Scag STT61V-35BVAC, STT61V-29DFI, STT-29DFI, STT61V-29DFI-LE, STT-35BVAC User Manual

OPERATOR’S
MANUAL

Turf Tiger

Models: STT52V-27CH
STT61V-27CH
STT61V-27KA
STT61V-29DFI
STT61V-29DFI-LE
STT61V-35BVAC

Congratulations on owning a Scag mower! This manual contains the operating
instructions and safety information for your Scag mower. Reading this manual
can provide you with assistance in maintenance and adjustment procedures to
keep your mower performing to maximum effi ciency. The specifi c models that
this book covers are listed on the inside cover. Before operating your machine,
please read all the information enclosed.

© 2010
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.

STT-29DFI
STT-35BVAC

PART NO. 03274 Rev. 2

PRINTED 12/2010

PRINTED IN USA

WARNING

FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT IN

SERIOUS INJURY OR DEATH.

Read this manual completely as well as other manuals that came with your mower.•

DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the •
cutter deck down). If the machine can back up the slope without the wheels slipping,
reduce speed and use extreme caution.

Under no circumstances should the machine be operated on slopes greater than 15 •
degrees. ALWAYS FOLLOW OSHA APPROVED OPERATION.

Stay two cut widths away from slopes, drop offs, ditches and retaining walls.•

DO NOT mow on wet grass. Wet grass reduces traction and steering control.•

Keep all shields in place, especially the grass discharge chute.•

Before performing any maintenance or service, stop the machine and remove the •
spark plug wire and ignition key.

If a mechanism becomes clogged, stop the engine before cleaning.•

Keep hands, feet and clothing away from power-driven parts.•

Keep others off the mow• er (only one person at a time)

REMEMBER - YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR!

HAZARD CONTROL AND ACCIDENT PREVENTION ARE DEPENDENT UPON THE AWARENESS,
CONCERN, PRUDENCE, AND PROPER TRAINING OF THE PERSONNEL INVOLVED IN THE
OPERATION, TRANSPORT, MAINTENANCE, AND STORAGE OF THE EQUIPMENT.

This manual covers the operating instructions and illustrated parts list for:

STT52V-27CH with a serial number of F5400001 to F5499999

STT61V-27CH with a serial number of F5600001 to F5699999

STT61V-27KA with a serial number of F5700001 to F5799999

STT61V-29DFI with a serial number of F5900001 to F5999999

STT-61V-29DFI-LE with a serial number of F6000001 to F6099999

STT61V-35BVAC with a serial number of F6300001 to F6399999

STT-29DFI with a serial number of F6500001 to F6599999

STT-35BVAC with a serial number of F6700001 to F6799999

Always use the entire serial number listed on the serial number tag when referring to this product.

Table of Contents

Table of Contents

GENERAL INFORMATIONSECTION 1 - ...................................................................................1

1.1 INTRODUCTION ...........................................................................................................................................1

1.2 DIRECTION REFERENCE ...........................................................................................................................1

1.3 SERVICING THE ENGINE AND DRIVE TRAIN COMPONENTS .................................................................1

1.4 SYMBOLS .................................................................................................................................................... 2

SAFETY INFORMATIONSECTION 2 - ......................................................................................3

2.1 INTRODUCTION ...........................................................................................................................................3

2.2 SIGNAL WORDS ..........................................................................................................................................3

2.3 BEFORE OPERATION CONSIDERATIONS ................................................................................................3

2.4 OPERATION CONSIDERATIONS ................................................................................................................4

2.5 ROLL-OVER PROTECTION SYSTEM .........................................................................................................6

2.6 MAINTENANCE CONSIDERATIONS & STORAGE ....................................................................................8

2.7 USING A SPARK ARRESTOR .....................................................................................................................8

2.8 SPARK IGNITION SYSTEM .........................................................................................................................8

2.9 SAFETY AND INSTRUCTIONAL DECALS .................................................................................................9

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SPECIFICATIONSSECTION 3 - ..............................................................................................10

3.1 ENGINE ...................................................................................................................................................... 10

3.2 ELECTRICAL ............................................................................................................................................. 10

3.3 POWER HEAD ........................................................................................................................................... 11

3.4 CUTTER DECK .......................................................................................................................................... 11

3.5 HYDRAULIC SYSTEM ...............................................................................................................................12

3.6 WEIGHTS AND DIMENSIONS ...................................................................................................................12

3.7 PRODUCTIVITY ......................................................................................................................................... 12

OPERATING INSTRUCTIONSSECTION 4 - ...........................................................................13

4.1 CONTROLS AND INSTRUMENT IDENTIFICATION ................................................................................ 13

4.2 SAFETY INTERLOCK SYSTEM ................................................................................................................14

4.3 INITIAL RUN-IN PROCEDURES ................................................................................................................15

4.4 STARTING THE ENGINE ...........................................................................................................................15

4.5 GROUND TRAVEL AND STEERING .........................................................................................................15

4.6 ENGAGING THE DECK DRIVE (CUTTER BLADES) ................................................................................ 16

4.7 HILLSIDE OPERATION ..............................................................................................................................17

4.8 PARKING THE MOWER .............................................................................................................................17

4.9 AFTER OPERATION ..................................................................................................................................17

4.10 REMOVING CLOGGED MATERIAL ........................................................................................................17

4.11 MOVING MOWER WITH ENGINE STOPPED ..........................................................................................18

4.12 RECOMMENDATIONS FOR MOWING .................................................................................................... 18

4.13 ADJUSTING CUTTING HEIGHT ..............................................................................................................18

4.14 ADJUSTING THE STEERING LEVERS ................................................................................................... 19

4.15 ADJUSTING THE HEIGHT ADJUST PEDAL ..........................................................................................19

4.16 TOWING (OPTIONAL HITCH ACCESSORY)...........................................................................................20

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Table of Contents

TROUBLESHOOTING CUTTING CONDITIONSSECTION 5 - ...............................................21

ADJUSTMENTSSECTION 6 - .................................................................................................24

6.1 PARKING BRAKE ADJUSTMENT ............................................................................................................24

6.2 TRAVEL ADJUSTMENTS ..........................................................................................................................25

6.3 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ............................................................................ 26

6.4 BELT ADJUSTMENT .................................................................................................................................26

6.5 BELT ALIGNMENT .....................................................................................................................................27

6.6 CUTTER DECK ADJUSTMENTS ..............................................................................................................27

6.7 CUSTOM-CUT BAFFLE ADJUSTMENT ...................................................................................................28

6.8 ELECTRIC CLUTCH ADJUSTMENT .........................................................................................................30

MAINTENANCESECTION 7 - ..................................................................................................31

7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS ......................................................31

7.2 LUBRICATION ............................................................................................................................................32

7.3 HYDRAULIC SYSTEM ...............................................................................................................................34

7.4 ENGINE OIL ............................................................................................................................................... 35

7.5 ENGINE FUEL SYSTEM ............................................................................................................................35

7.6 ENGINE AIR CLEANER .............................................................................................................................36

7.7 BATTERY ....................................................................................................................................................37

7.8 DRIVE BELTS .............................................................................................................................................38

7.9 CUTTER BLADES ......................................................................................................................................38

7.10 TIRES ........................................................................................................................................................39

7.11 CUTTER DECK GEARBOX .....................................................................................................................40

7.12 COOLING SYSTEM .................................................................................................................................40

7.13 BODY, DECK, AND UPHOLSTERY .........................................................................................................41

NOTES ..............................................................................................................................................................42

ILLUSTRATED PARTS LISTSECTION 8 - ..............................................................................43

8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES......................................................................43

52V CUTTER DECK ......................................................................................................................................... 44

61V & 72VS CUTTER DECKS .........................................................................................................................46

CUTTER DECK CONTROLS ...........................................................................................................................48

SHEET METAL COMPONENTS ......................................................................................................................50

STT ROLL-OVER PROTECTION SYSTEM ..................................................................................................... 52

STT SUSPENSION SEAT ................................................................................................................................54

DECK DRIVE COMPONENTS .........................................................................................................................56

ENGINE AND ATTACHING PARTS - KOHLER ...............................................................................................58

ENGINE & ATTACHING PARTS - 27HP, 29DFI KAWASAKI & 35BVAC ........................................................60

BRAKE AND STEERING COMPONENTS ......................................................................................................62

STT HYDRAULIC SYSTEM .............................................................................................................................64

STT FUEL SYSTEM - EPA PHASE 2 ..............................................................................................................66

STT FUEL SYSTEM - EPA PHASE 3 ..............................................................................................................68

STT-LE FUEL SYSTEM - C.A.R.B. TIER 3 ......................................................................................................70

II

Table of Contents

BDP-16A HYDRAULIC PUMP ASSEMBLY .....................................................................................................72

BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN(29DFI & 35BVAC)) .................................74

BELECTRICAL SYSTEM (KOHLER & BRIGGS & STRATTON) .................................................................... 76

ELECTRICAL SYSTEM - 27HP KAWASAKI ...................................................................................................78

ELECTRICAL SYSTEM - 29DFI KAWASAKI .................................................................................................. 80

REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................82

STT ELECTRICAL SCHEMATIC (KOHLER) ...................................................................................................84

STT ELECTRICAL SCHEMATIC - 29DFI KAWASAKI ....................................................................................86

STT ELECTRICAL SCHEMATIC (35BVAC BRIGGS & STRATTON) .............................................................87

LIMITED WARRANTY - COMMERCIAL EQUIPMENT .........................Following Section 8

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III

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Table of Contents

IV

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Section 1

SERIAL NUMBER
PLATE LOCATION

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MODEL

SERIAL

Division of Metalcraft of Mayville, Inc.

Mayville, Wisconsin 53050

Patents Issued and Pending

MANUFACTURED UNDER ONE OR MORE

OF THE FOLLOWING PATENTS:

PATENTS PENDING

4,487,006

4,885,903

4,920,733

4,967,543

4,991,382

4,998,948

5,118,617

5,826,416

5,832,708

5,865,018

GENERAL INFORMATION

INTRODUCTION1.1

Your mower was built to the highest standards in the
industr y. However, the prolonged life and maximum
efficiency of your mower depends on you following the
operating, maintenance and adjustment instructions in
this manual.

If additional information or service is needed, contact your
Scag Power Equipment Dealer.

We encourage you to contact your dealer for repairs.
All Scag dealers are informed of the latest methods to
service this equipment and provide prompt and efficient
service in the field or at their service shop. They carry a
full line of Scag service parts.

- IMPORTANT -

The replacement of any part on this product
by other than the manufacturer's authorized
replacement part may adversely affect the
performance, durability or safety of this
product.

USE ONLY SCAG APPROVED ATTACHMENTS AND
ACCESSORIES.

Attachments and accessories manufactured by companies
other than Scag Power Equipment are not approved for
use on this machine. See Section 8-1.

WARNING

For pictorial clarity, some illustrations and figures
in this manual may show shields, guards or plates
open or removed. Under no circumstances should
your mower be operated without these devices
in place.

All information is based upon product information available
at the time of approval for printing. Scag Power Equipment
reserves the right to make changes at any time without
notice and without incurring any obligation.

DIRECTION REFERENCE1.2

When ordering parts, always give the model and serial
number of your mower. The serial number plate is located
between the seat and the controls where shown in Figure
1-1.

Use of other than original Scag replacement
parts will void the warranty.

Mower Serial Number Plate LocationFigure 1-1.

The “Right” and “Left”, “Front” and “Rear” of the machine
are referenced from the operator’s right and left when
seated in the normal operating position and facing the
forward travel direction.

SERVICING THE ENGINE AND DRIVE 1.3

TRAIN COMPONENTS

The detail servicing and repair of the engine, hydraulic
pumps and gearboxes are not covered in this manual;
only routine maintenance and general service instructions
are provided. For service of these components during the
limited warranty period, it is impor tant to contact your
Scag dealer or find a local authorized servicing agent
of the component manufacturer. Any unauthorized work
done on these components during the warranty period
may void your warranty.

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SYMBOLS1.4

48071S

481039S

SYMBOL DESCRIPTION SYMBOL DESCRIPTION

Choke

Transmission

Section 1

Parking Brake

On/Start

Off/Stop

Falling Hazard

Fast

Continuously Variable - Linear

Spinning Blade

Spring Tension on Idler

Oil

Thrown Object Hazard

Slow

Cutting Element - Basic Symbol

Pinch Point

Hour meter/Elapsed Operating Hours

Thrown Object Hazard

Cutting Element - Engage

Cutting Element - Disengage

Read Operator's Manual

Keep Bystanders Away

2

Section 2

SAFETY INFORMATION

INTRODUCTION2.1

Your mower is only as safe as the operator. Carelessness
or operator error may result in serious bodily injury
or death. Hazard control and accident prevention are
dependent upon the awareness, concern, prudence, and
proper training of the personnel involved in the operation,
transport, maintenance and storage of the equipment. Make
sure every operator is properly trained and thoroughly
familiar with all of the controls before operating the
mower. The owner/user can prevent and is responsible for
accidents or injuries occurring to themselves, other people
or property.

READ THIS OPERATOR’S MANUAL BEFORE
ATTEMPTING TO START YOUR MOWER.

A replacement manual is available from your authorized
Scag Service Dealer or by contacting Scag Power
Equipment, Service Department at P.O. Box 152, Mayville,
WI 53050 or contact us via the Internet at www.scag.com.
The manual for this machine can be downloaded by using
the model and serial number or use the contact form to
make your request. Please indicate the complete model
and serial number of your Scag product when requesting
replacement manuals.

SIGNAL WORDS2.2

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DANGER

The signal word “DANGER” denotes that an extremely
hazardous situation exists on or near the machine that
could result in high probability of death or irreparable injury
if proper precautions are not taken.

WARNING

The signal word “WARNING” denotes that a hazard exists
on or near the machine that can result in injury or death if
proper precautions are not taken.

CAUTION

The signal word “CAUTION” is a reminder of safety practices
on or near the machine that could result in personal injury
if proper precautions are not taken.

Your safety and the safety of others depends significantly
upon your knowledge and understanding of all correct
operating practices and procedures of this machine.

This symbol means “Attention! Become Alert! Your
Safety is Involved!" The symbol is used with the following
signal words to attract your attention to safety messages
found on the decals on the machine and throughout this
manual. The message that follows the symbol contains
important information about safety. To avoid injury and
possible death, carefully read the message! Be sure to fully
understand the causes of possible injury or death.

SIGNAL WORD:

It is a distinctive word found on the safety decals on the
machine and throughout this manual that alerts the viewer
to the existence and relative degree of the hazard.

BEFORE OPERATION 2.3

CONSIDERATIONS

WARNING

Check all hydraulic connections for tightness.
Inspect all hydraulic hoses and / or lines to insure
they are in good condition before operating.

NEVER allow children to operate this riding mower. 1.
Do not allow adults to operate this machine without
proper instructions.

Do not mow when children and/or others are 2.
present. Keep children out of the mowing area and
in the watchful care of a responsible adult other than
the operator. Be alert and turn machine off if a child
enters the area.

3

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Section 2

DO NOT allow children to ride or play on the 3.
machine, it is not a toy.

Clear the area to be mowed of objects that could be 4.
picked up and thrown by the cutter blades.

DO NOT carry passengers.5.

DO NOT operate the machine under the influence of 6.
alcohol or drugs.

If the operator(s) or mechanic(s) cannot read English 7.
or Spanish, it is the owner's responsibility to explain
this material to them.

DO NOT wear loose fitting clothing. Loose clothing, 8.
jewelry or long hair could get tangled in moving
parts. Do not operate the machine wearing shorts;
always wear adequate protective clothing including
long pants. Wearing safety glasses, safety shoes and
a helmet is advisable and is required by some local
ordinances and insurance regulations.

WARNING

Always wear hearing protection. Operating this
machine over prolonged periods of time can
cause loss of hearing.

Keep the machine and attachments in good 9.
operating condition. Keep all shields and safety
devices in place. If a shield, safety device or decal
is defective or damaged, repair or replace it before
operating the machine.

WARNING

This machine is equipped with an interlock system
intended to protect the operator and others from
injury. This is accomplished by preventing the
engine from starting unless the deck drive is
disengaged, the parking brake is on, the steering
control levers are in the neutral position and the
operator is in the seat. The system shuts off the
engine if the operator leaves the seat with the deck
drive engaged and/or the steering control levers
are not in the neutral position and the parking
brake is not engaged. Never operate equipment
with the interlock system disconnected or
malfunctioning.

Be sure the interlock switches are functioning 10.
correctly.

Fuel is flammable; handle it with care. Fill the fuel 11.
tank outdoors. Never fill it indoors. Use a funnel or
spout to prevent spillage. Clean up any spillage
before starting the engine.

DO NOT add fuel to a running or hot engine. Allow 12.
the engine to cool for several minutes before adding
fuel. Never fuel indoors or inside enclosed trailers.

Keep flammable objects (cigarettes, matches, etc.), 13.
open flames and sparks away from the fuel tank and
fuel container. Use only approved containers.

See Section 7.5 ENGINE FUEL SYSTEM for fueling 14.
procedure.

Equipment must comply with the latest requirements 15.
per SAE J137 and/or ANSI/ASAE S279 when driven
on public roads.

- NOTE -

If the mower is driven on public roads, it must
comply with state and local ordinances as well as
SAE J137 and/or ANSI / ASAE S279 requirements.
Contact your local authorities for regulations and
equipment requirements.

Do not operate without the side discharge chute 16.
installed and in the down position or with an optional
grass catcher or mulch plate completely installed.

Check the blade mounting bolts at frequent intervals 17.
for proper tightness.

Make sure all hydraulic fluid connections are tight 18.
and all hydraulic hoses and lines are in good
condition before starting the machine.

OPERATION CONSIDERATIONS2.4

Know the function of all controls and how to stop 1.
quickly.

WARNING

DO NOT operate on steep slopes. To check a slope,
attempt to back up it (with the cutter deck down).
If the machine can back up the slope without the
wheels slipping, reduce speed and use extreme
caution. Under no circumstances should the
machine be operated on slopes greater than 15
degrees. See Figure 2-4, Page 7 to determine
approximate slope of area to be mowed. ALWAYS
FOLLOW OSHA APPROVED OPERATION.

4

Section 2

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Reduce speed and exercise extreme caution on 2.
slopes and in sharp turns to prevent tipping or loss
of control. Be especially cautious when changing
directions on slopes.

Stay two cut widths away from slopes, drop offs, 3.
ditches and retaining walls.

To prevent tipping or loss of control, start and stop 4.
smoothly, avoid unnecessary turns and travel at
reduced speed.

When using any attachment, never direct the 5.
discharge of material toward bystanders or allow
anyone near the machine while in operation.

Before attempting to start the engine, with the 6.
operator in the seat, disengage power to the cutter
deck, place the steering control levers in the neutral
position and engage the parking brake.

If the mower discharge ever plugs, shut off the 7.
engine, remove the ignition key, and wait for all
movement to stop before removing the obstruction.

Take all possible precautions when leaving the 14.
machine unattended, such as disengaging the
mower, lowering the attachments, setting the parking
brake, stopping the engine, and removing the key.

Disengage power to the attachments when 15.
transporting or when not in use.

The machine and attachments should be stopped 16.
and inspected for damage after striking a foreign
object, and damage should be repaired before
restarting and operating the machine.

CAUTION

Do not touch the engine or the muffl er while the
engine is running or immediately after stopping.
These areas may be hot enough to cause a
burn.

WARNING

DO NOT use your hand to dislodge the clogged
discharge chute. Use a stick or other device to
remove clogged material after the engine has
stopped running and the blades have stopped
turning.

Be alert for holes, rocks, roots and other hidden 8.
hazards in the terrain. Keep away from any drop­offs. Beware of overhead obstructions (low limbs,
etc.), underground obstacles (sprinklers, pipes, tree
roots, etc.). Cautiously enter a new area. Be alert for
hidden hazards.

Disengage power to cutter deck before backing up. 9.
Do not mow in reverse unless absolutely necessary
and then only after observation of the entire area
behind the mower. If you must mow in reverse,
maintain a constant lookout to the rear of the
machine and mow slowly.

DO NOT turn sharply. Use care when backing up.10.

Disengage power to cutter deck before crossing 11.
roads, walks or gravel drives.

Mow only in daylight or good artificial light.12.

NEVER raise the deck with the blades engaged.13.

DANGER

DO NOT run the engine inside a building or
a confined area without proper ventilation.
Exhaust fumes are hazardous and contain
carbon monoxide which can cause brain injury
and death.

Keep hands and feet away from cutter blades and 17.
moving parts. Contact can injure.

Transport the mower using a heavy duty trailer 18.
or truck. Insure the trailer or truck has all of the
necessary lighting and markings as required by
laws, codes, and ordinances. Secure a trailer with a
safety chain.

Be cautious when loading and unloading onto trailers 19.
or trucks. Use only a full width ramp. Ramp angle
should be no more than 15 degrees. See Figure 2-4,
Page 7 to determine approximate slope of the ramp.
Back up the ramp and drive down forward.

When transporting the mower, make sure the park 20.
brake is engaged, the steering control levers are in
the neutral position, the engine is off with the key
removed, and the wheels have been blocked.

Tie the mower down securely using straps, chains, 21.
cable, or ropes. Both front and rear straps must be
directed down and outward from machine.

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Section 2

Use care when approaching blind corners, shrubs, 22.
trees, or other objects that may obscure vision.

NEVER leave the machine running unattended.23.

ROLL-OVER PROTECTION SYSTEM2.5

WARNING

Keep the roll bar in the raised and locked position
and the seat belt securely fastened during
operation. Failure to do so could cause serious
injury or loss of life.

This mower has been designed for good traction and
stability under normal mowing conditions. However, caution
must be used when traveling on slopes, especially when the
grass is wet. Do not mow on wet grass. Wet grass reduces
traction and steering control.

Any or all parts of the Roll-Over Protection System MUST
NOT be removed. Failure to adhere to this guideline could
result in injury or death.

Lower the roll bar only when absolutely necessary.

To lower the roll bar, remove the hairpin cotter pins 1.
and remove the two (2) lock pins. See Figure 2-2.

Lower the roll bar to the down position.2.

To raise the roll bar, lift the bar to the upright 3.
position.

Install the two (2) lock pins through the hole, secure 4.
with the two (2) hairpin cotter pins. See Figure 2-2.

UPRIGHT AND
LOCKED POSITION

WARNING

There is no roll-over protection when the roll bar
is in the down position.

Lower the roll bar only when absolutely
necessary.

Raise the roll bar as soon as clearance permits.

DO NOT wear the seat belt when the roll bar is in
the down position.

ALWAYS wear seat belt when roll bar is in the up
position.

Operate the machine smoothly, no sudden turns,
starts or stops.

Check the area carefully before mowing for proper
overhead clearance (i.e. branches, doorways,
etc.).

DO NOT contact any overhead object with the
roll bar.

Foldable Roll-Over Protection SystemFigure 2-1.

HAIR PIN

LOCK PIN

ROPS HingeFigure 2-2.

The potential exposure of the seat belt to severe
environmental conditions make it crucial to inspect the seat
belt system regularly.

It is recommended that the seat belt be inspected on a
daily basis for signs of damage. Any seat belt system that
shows cuts, fraying, extreme or unusual wear, significant
discoloration due to UV exposure, dirt or stiffness, abrasion
to the seat belt webbing, or damage to the buckle, latch
plate, hardware or any other obvious problem should be
replaced immediately.

6

Section 2

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WARNING

Failure to properly inspect and maintain the seat
belt can cause serious injury or loss of life.

Check the full length of the seat belt webbing for 1.
cuts, wear, fraying, dirt and stiffness. See Figure 2-3.

Check the seat belt webbing in areas exposed to 2.
ultra violet rays from the sun or extreme dust or
dirt. If the original color of the webbing in these
areas is extremely faded and/or is packed with dirt,
the physical strength of this webbing may have
deteriorated. If this condition exists, replace the seat
belt system.

Check the buckle and latch for proper operation 3.
and determine if the latch plate is excessively worn,
deformed, or if the buckle is damaged or cracked.
See Figure 2-3.

INSPECT BUCKLE
& LATCH

o

20

o

15

o

10

o

5

Slope Angle GraphFigure 2-4.

WARNING

Reduce speed when turning, operating on slopes,
slick or wet surfaces. Allow extra distance to
stop.

Stay off of slopes too steep for safe operation.
To check a slope, attempt to back up it (with the
cutter deck down). If the machine can not back
up the slope without the wheels slipping, do not
operate the machine on this slope. Under no
circumstances should the machine be operated
on slopes greater than 15 degrees. See Figure 2-4
to determine approximate slope.

INSPECT WEBBING

Seat Belt InspectionFigure 2-3.

DO NOT mow near drop-offs, ditches or
embankments. The machine could suddenly roll
over if a wheel goes over the edge or if the edge
caves in.

Operate the machine smoothly, no sudden turns,
starts or stops on a slope.

NEVER tow on slopes. The weight of the towed
equipment may cause loss of traction and loss
of control.

DO NOT permit untrained personnel to operate
the machine.

Be cautious when loading and unloading onto
trailers or trucks.

Use only a full width ramp.

Ramp angle should be no more than 15 Degrees.
See Figure 2-4 to help determine approximate
slope.

Back up the ramp and drive down forward.

7

MAINTENANCE CONSIDERATIONS & 2.6

STORAGE

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Section 2

WARNING

Never make adjustments to the machine with the 1.
engine running unless specifically instructed to do
so. If the engine is running, keep hands, feet, and
clothing away from moving parts.

Disengage drives, lower implement, set parking 2.
brake, stop engine and remove key or disconnect
spark plug wire to prevent accidental starting of the
engine when servicing or adjusting the machine.
Wait for all movement to stop before adjusting,
cleaning or repairing.

Disconnect battery or remove spark plug wire before 3.
making any repairs. Disconnect the negative terminal
first and the positive last. Reconnect the positive first
and the negative last.

Keep all nuts, bolts and screws tight, to ensure the 4.
machine is in safe working condition. Check blade
mounting bolts frequently to be sure they are tight.

Do not change the engine governor settings or 5.
overspeed the engine. See the engine operator's
manual for information on engine settings.

To reduce fire hazard, keep the cutting units, drives, 6.
muffler and engine free of grass, leaves, excessive
grease, oil and dirt.

Park the machine on level ground and engage the 7.
parking brake.

NEVER allow untrained personnel to service the 8.
machine.

Hydraulic fl uid is under high pressure and can
penetrate skin causing injury. If hydraulic fl uid
is injected into the skin, it must be surgically
removed within a few hours by a doctor or
gangrene may result.

Keep body and hands away from pinholes or
nozzles that eject hydraulic fluid under high
pressure.Use paper or cardboard and not hands
to search for leaks.

Safely relieve all pressure from the hydraulic
system by placing the control levers in the neutral
lock position and shutting off the engine before
performing any work on the hydraulic system.

If you need service on your hydraulic system,
please see your authorized Scag dealer.

Let the engine cool before storing.13.

DO NOT store the machine near an open flame.14.

Shut off fuel while storing or transporting.15.

DO NOT store fuel near flames or drain indoors.16.

Charge batteries in an open, well ventilated area, 17.
away from spark and flames. Unplug charger before
connecting or disconnecting from battery. Wear
protective clothing and use insulated tools.

Use care when checking blades. Use a Blade Buddy, 9.
wrap the blade(s) or wear gloves and USE CAUTION
when servicing blades. Only replace blades. NEVER
straighten or weld blades.

Keep all parts in good working condition. Replace all 10.
worn or damaged decals.

Use jack stands to support components when 11.
required.

Carefully release pressure from components with 12.
stored energy.

USING A SPARK ARRESTOR2.7

The engine in this machine is not equipped with a spark
arrestor muffler. It is in violation of California Public
Resource Code Section 4442 to use or operate this engine
on or near any forest covered, brush covered or grass
covered land unless the exhaust system is equipped with
a spark arrestor meeting any applicable local or state laws.
Other states or federal areas may have similar laws. Check
with your state or local authorities for regulations pertaining
to these requirements.

SPARK IGNITION SYSTEM2.8

This spark ignition system complies with Canadian
ICES-002.

8

Section 2

WARNING

SAFETY AND INSTRUCTIONAL DECALS2.9

483407

483407

WARNING

INSTALL BELT COVER BEFORE

OPERATING MACHINE

READ OPERATOR'S MANUAL

483402

483402

FORWARD

R

R

483406

483633

484293

483300

F

483425

REVERSE

481568

WARNING

Operation of this equipment
may create sparks that can
start res around dry
vegetation. A spark
arrestor may be required.
The operator should contact
local re agencies for laws
or regulations relating to
re prevention requirements.

483900

(supplied with California

models only)

483397

483900

483397

484321

484320

390S0150i

9

R

Section 3

SPECIFICATIONS

ENGINE3.1

General Type ................................................................................................Heavy Duty Industrial/Commercial Gasoline

Model:

Scag Model STT52V-27CH, STT61V-27CH .......................................................................Kohler Command CH740S

Scag Model STT61V-27KA ............................................................................................................ Kawasaki FD750D

Scag Model STT61V-29DFI-SS, STT-29DFI-SS ............................................................................ Kawasaki FD791D

Scag Model STT61V-35BVAC-SS, STT-35BVAC-SS ........................................................Briggs & Stratton Vanguard

Horsepower @ 3800 RPM:

Scag Model STT52V-27CH, STT61V-27CH ........................................................................................................ 27HP

Scag Model STT61V-27KA ................................................................................................................................. 27HP

Scag Model STT61V-29DFI-SS, STT-29DFI-SS .................................................................................................29HP

Scag Model STT61V-35BVAC-SS, STT-35BVAC-SS .......................................................................................... 35HP

Displacement:

Kohler CH740S................................................................................................................................................... 725cc

Kawasaki FD750D and FD791D ........................................................................................................................ 745cc

Briggs & Stratton ................................................................................................................................................ 993cc

Type:

Kohler ...................................................................................4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV

Kawasaki (FD750D) .............................................................4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV

Kawasaki (FD791D) ..................................................... 4-Cycle, Liquid-Cooled, Digital Fuel Injection Gasoline, OHV

Briggs & Stratton .................................................................................4-Cycle, Air-Cooled, Naturally Aspirated, OHV

Cylinders ..................................................................................................................................... 2 with Cast Iron Sleeves

Governor ........................................................................Mechanical Type with Variable Speed Control Set At 3800 RPM

Idle Speed:

Kohler ..........................................................................................................................................................1400 RPM

Kawasaki .....................................................................................................................................................1400 RPM

Briggs & Stratton ......................................................................................................................................... 1750 RPM

Carburation:

Kohler .......................................................... Fixed Jet Carburetor with Smart-Choke™ and Fuel Shutdown Solenoid

Kawasaki (FD750D) ................................................................................................... Fixed Jet Downdraft Carburetor

Kawasaki (FD791D) .....................................................................................................................Digital Fuel Injection

Briggs & Stratton .......................................................................................................... Fixed Jet Sidedraft Carburetor

Fuel Pump:

Kohler .................................................................................................................... Mechanical with In-Line Fuel Filter

Kawasaki ..............................................................................................High Pressure Electric with In-Line Fuel Filter

Briggs & Stratton ................................................................................................... Mechanical with IN-Line Fuel Filter

Fuel ...................................................................................... Non-Leaded Gasoline with a Minimum Octane Rating of 87

Oil Pump ...........................................................................................................................Full Pressure w/Full-Flow Filter

Starter ........................................................................................................................ Electric Starting with Solenoid Shift

Belts .................................................................................................................Kevlar cord. Self-adjusting, Self-tightening

ELECTRICAL3.2

Battery .................................................................................................................................................................... 12 Volt

Charging System ............................................................................................................................................... Alternator

Charging Output:

Kohler ..................................................................................................................................................12 Volt, 15 Amp

Kawasaki .............................................................................................................................................12 Volt, 20 Amp

Briggs & Stratton ................................................................................................................................. 12 Volt, 20 Amp

System Polarity ....................................................................................................................................... Negative Ground

Interlock Switches ....................................................... Seat, Neutral Control, Mower Engagement (BBC), Parking Brake

Instrument Panel ...................................................... Ammeter, Key Switch, Throttle Lever, Manual Choke, BBC Switch,

Fuses and Safety Start module, Temp. Gauge (KA), Check Engine Indicator (DFI)

Fuses ........................................................................................................................................................ Two (2) 20 Amp

10

R

Section 3

POWER HEAD3.3

Drive System ............... Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-Iron High Torque Motors

Hydrostatic Pumps .....................................................................Two Hydro-Gear™ 16 cc/rev. Pumps with Dump Valves

Drive Wheel Motors: ......................................................Two Parker Model TG 15 cu. inch Cast-Iron High Torque Motors

Steering/Travel Control ...........................................................................................Twin Lever Fingertip Steering Control

with Individual Control to Each Wheel with Gas Spring Dampers

Parking Brake ...................................................................Lever Actuated Linkage to Brakes on Both Drive Wheel Axles

Wheels:

(2) Front Caster - (52" Deck) .......................................................................................... 13 X 5.00 Four-Ply, Flat Free

(2) Front Caster - (61" & 72" Deck) ................................................................................ 13 X 6.50 Four Ply, Flat Free

(2) Drive - (52" Deck) .................................................... 23 X 10.50 X 12 Four-Ply Pneumatic Tubeless, Radius Edge

(2) Drive - (61" & 72" Deck) ................................................ 24 x 12 x 12 Four-Ply Pneumatic Tubeless, Radius Edge

Tire Pressure:

Front Caster....................................................................................................................................................Flat Free

Drive .................................................................................................................................................................. 12 PSI

Fuel Tank ................................8-1/2-Gallon Seamless Polyethylene Tank with Large Opening, Fuel Gauge and Fill Cap

Seat ...........................................................................................................................................Padded Suspension Seat

Travel Speed .................................................................................................................... 27HP ..................... 29HP/35HP

Forward.........................................................................................................................0-10 MPH ....................0-12 MPH

Reverse ......................................................................................................................... 0-5 MPH .......................0-6 MPH

-NOTE- The machine will travel at 10 mph or 12 mph for transport purposes. For best cutting performance the forward
travel speed should be adjusted depending upon the cutting conditions.

CUTTER DECK3.4

Type ......................... Floating, Adjustable, Anti-Scalping, Hybrid Design Combines Out-Front and Belly-Mount Designs

Construction ............................................................................................................................Tri-Plate deck construction

Top of deck consists of three steel plates totaling nearly 1/2" of steel., 7-gauge (3/16") deck skirt.
True Cutting Width:

52V ........................................................................................................................................................52" (132.0 cm)

61V ........................................................................................................................................................61" (155.0 cm)

72VS ...................................................................................................................................................71.5" (181.6 cm)

Cutting Height Adjustment ...........Foot-Operated Lever Adjustment from Operator's Seat, 1.0" to 6.0" in 1/4"increments

Cutter Blades .........................................................................197 or .250 Thick, Milled Edge, Wear Resistant Marbain™

52V .............................................................................................................................................. Three (3) 18" blades

61V .............................................................................................................................................. Three (3) 21" blades

72VS ......................................................................................................................................... Three (3) 24.5" blades

Blade Engagement ............................................................Electric Blade Engagement Clutch with Control Panel Switch

Connected to the Cutter Deck Gearbox through a Drive Shaft.

Discharge Opening ....................Extra-Wide Discharge Opening with Spring-Loaded Discharge Chute and Turbo Baffle

Discharge Chute ...................................................................................................Black, Polypropylene (Plastic), Flexible

Spindles ......................................Heavy-Duty 1-1/8" Top Dimension Spindle Shaft, Cast Housing, Taper Roller Bearing,

Low Maintenance with Top Access Grease Fitting and Grease Overfill Relief Poppet

Spindle Pulleys ............................................................................................ Split Steel with Easily Removed Taper Hubs

Cutter Deck Belts .................................................................. B-Section with Kevlar Cord, Self-Adjusting, Self-Tightening

Electric Clutch Type ................................................................................................Ogura Heavy Duty PTO Clutch Brake

Drive Shaft ............................................................................................Clamp Yoke Shaft With Two High-Speed U-Joints

11

R

Section 3

HYDRAULIC SYSTEM3.5

Hydraulic Oil Filter ........................................................................................................ 10 Micron Spin-on Element Type

Hydraulic Reservoir ..................................................................................................................... Nylon; 3 Quart Capacity

WEIGHTS AND DIMENSIONS 52V 61V 72VS3.6

Length......................................................................................... 83" ............................... 87.5" ...................................90"

Tracking Width ............................................................................ 51" ................................ 56" ....................................56"

Overall Width w/chute down ......................................................64.5" .............................. 73.5" ...................................83"

Overall Width w/chute up ............................................................ 53" ................................ 62" ....................................73"

Overall Height w/ROPS up ........................................................67.5" .............................. 67.5" ................................67.5"

Overall Height w/ROPS down .................................................... 56.5" ..............................56.5" ................................56.5"

Operating Weight w/ROPS ....................................................... 1250# ............................ 1350# .............................1400#

Operating Weight w/ROPS and 35BV Engine .............................NA ..............................1445# ............................. 1495#

PRODUCTIVITY 52V 61V 72VS3.7

Cutting Width .............................................................................. 52" ................................ 61" ....................................72"

Acres Per Day .............................................................................20.2 .............................. 23.7 ..................................... 28

The preceding chart will aid you in determining how many acres your Scag mower will cut per day. The chart is an
estimate based on 8 hours per day cutting time at 6 MPH with a 20% allowance for overlap and turns.

12

R

Section 4

CHOKE

481348

F

LEFT STEERING

CONTROL

MOWER DECK

IGNITION SWITCH

FUEL

GAUGE

DUMP VALV E

DUMP VALV E

FUSES

ENGINE

CHOKE

CONTROL

ENGINE THROTTLE

CONTROL

RIGHT STEERING

CONTROL

DECK LIFT

DECK RELEASE

2011 STTCHMI

PARKING BRAKE

CONTROL

CUTTING HEIGHT

ADJUSTMENT

KAWASAKI DFI ONLY

AMMETER

SWITCH

WATER TEMPERATURE

CHECK
ENGINE

LIGHT

CHECK

ENGINE LIGHT

482796

SLOW

FAST

HOUR METER

SEAT BELT

OPERATING INSTRUCTIONS

CAUTION

Do not attempt to operate this mower unless you
have read this manual. Learn the location and
purpose of all controls and instruments before
you operate this mower.

CONTROLS AND INSTRUMENT 4.1

IDENTIFICATION

Before operating the mower, familiarize yourself with all
mower and engine controls. Knowing the location, function
and operation of these controls is important for safe and
efficient operation of the mower.

Mower Deck Switch (Figure 4-1). 2. Used to engage
and disengage the mower drive system. Pulling up
on the switch will engage the deck drive. Pushing
down on the switch will disengage the deck drive.

Engine Choke Control (Figure 4-1).

3. Used to start

a cold engine. Not used on the 29DFI.

Engine Throttle Control (Figure 4-1).4. Used to
control the engine speed. Pushing the lever forward
increases engine speed. Pulling the lever back
decreases engine speed. Full back position is the
IDLE position. Full forward is the cutting position.

Ammeter (Figure 4-1).5. Indicates the condition of
the charging system. When the engine is running
the needle should be toward the positive end of the
meter. If the needle is toward the negative end of the
meter, this indicates a discharge condition and the
machine should be taken in for service.

Ignition Switch (Figure 4-1).1. The ignition switch
is used to start the engine and has three positions;
OFF, ON, and START.

Controls and InstrumentsFigure 4-1.

13

R

Section 4

390S141-1

DUMP VALV E
CONTROL

Hourmeter (Figure 4-1).6. Indicates the number of
hours the engine has been operated. It only operates
when the engine is running. Has preset maintenance
reminders for engine and hydraulic system oil
changes. Will start flashing scheduled maintenance
2 hours before preset time and continue flashing
until 2 hours after. Automatically resets.

Fuse Holders (Figure 4-1).

7. Two 20-amp fuses

protect the mower’s electrical system. To replace
fuses, pull fuse out of the socket and install a new
fuse.

8. Used to control

Left Steering Control (Figure 4-1).

the mower's left wheel when traveling forward or
reverse.

Right Steering Control (Figure 4-1).

9. Used to

control the mower's right wheel when traveling
forward or reverse.

10. Used to

Parking Brake Control (Figure 4-1).

engage and disengage the parking brakes. Pull the
lever back to engage the parking brakes. Push the
lever forward to disengage the parking brakes.

Fuel Gauge (Figure 4-1). 11. Indicates the amount of
fuel in the fuel tank.

Dump Valve Control Levers (Figure 4-2). 12. Located
on the hydraulic pumps, used to “free-wheel” the
mower. Rotating the levers clockwise until they stop
allows the unit to move under hydraulic power. The
levers must be in this position and torqued to 10 lb-ft
during operation of the mower. Rotating the levers
counter-clockwise allows the mower to be moved by
hand (free-wheeling).

Cutting Height Adjustment (Figure 4-1).14. Used to
set the cutter deck at the desired cutting height.

Deck Release Lever (Figure 4-1). 15. Used to lock the
cutter deck in the transport position. Push the foot
pedal forward and pull back on the release lever to
release the cutter deck for normal mowing.

Temperature Gauge (Figure 4-1).

16. Indicates the

operating temperature of the engine. Used on
mowers with the liquid-cooled engine only.

Check Engine Light (Figure 4-1).17. Indicates the
operation of the engine sensors on the Kawasaki
Digital Fuel Injection (DFI). Light will flash once at
initial start up. If a problem occurs with a sensor
on the engine, the light will flash a code. See your
authorized Scag Dealer for diagnosis and repair.

18. Used to secure the operator.

Seat Belt (Figure 4-1).

Seat belt must be worn at all times when the ROPS
is in the upright and locked position.

Seat Hold Down Release Latch (Figure 4-1).19.
Located behind the seat. Used to secure the seat
in the operator's position. Release the latch to gain
access under the seat.

SAFETY INTERLOCK SYSTEM4.2

The mower is equipped with a safety interlock system that
prevents the engine from starting unless the deck drive is
disengaged, the parking brake is engaged, the steering
control levers are in the neutral position and the operator
is in the seat. The interlock system shuts off the engine
if the operator leaves the seat with the steering control
levers not in the neutral position and/or the cutter blades
engaged and the parking brake not engaged.

Deck Lift Foot Lever (Figure 4-1). 13. Used to raise
and lower the cutter deck. Push full forward to lock in
the transport position.

WARNING

Never operate the mower with the interlock
system disconnected or malfunctioning. Do not
disengage or bypass any switch; injury to yourself
and others or property damage could result.

Dump Valve ControlFigure 4-2.

14

R

Section 4

INITIAL RUN-IN PROCEDURES4.3

9.

Allow engine to warm before operating the mower.

FIRST DAY OF USE OR APPROXIMATELY 20 HOURS

Check all belts for proper alignment and wear at 2, 4 1.
and 8 hours.

Change the engine oil and oil filter after the first 20 2.
hours of operation. (See Section 7.4.)

Check hydraulic oil level in reservoir. (See Section 3.

7.3.)

Check for loose hardware. Tighten as needed.

4.

Check interlock system for proper operation. (See 5.
Section 4.2.)

6.

Check tire pressure. Adjust pressure if necessary.
(See Section 7.10.)

STARTING THE ENGINE4.4

CAUTION

DO NOT USE STARTING FLUIDS. Use of starting
fluids in the air intake system may be potentially
explosive or cause a “runaway” engine condition
that could result in engine damage and/or
personal injury.

Be sure the fuel shutoff valve, located behind the 1.
operator's seat, is fully open. (See Section 7.5.)

2.

Secure the ROPS in the upright and locked position.

Sit in the operator’s seat, fasten seat belt and place 3.
the steering control levers in the neutral position.

GROUND TRAVEL AND STEERING4.5

- IMPORTANT -

If you are not familiar with the operation of a
machine with lever steering and/or hydrostatic
transmissions, the steering and ground speed
operations should be learned and practiced in
an open area, away from buildings, fences, or
obstructions.

Learn the operation on flat ground before operating
on slopes.

Start practicing with a slow engine speed and slow
forward travel.

Learn to feather the steering controls to obtain a
smooth operating action.

Practice operating the mower until you are
comfortable with the controls before proceeding
to mow.

FORWARD TRAVEL

To travel forward with the mower, disengage the parking
brake, pull levers inward out of the neutral lock position
and slowly push the steering control levers forward an
equal distance. The further the steering control levers
are pushed forward the greater the forward speed will
be. To increase the speed, push the steering control
levers further forward and to decrease the speed, pull the
steering control levers back.

To stop the forward travel, pull the steering control levers
back to the neutral position.

Engage the parking brake.4.

Place the PTO switch in the disengaged position.5.

If the engine is cold, choke the engine as needed.6.

Move the engine throttle control to about half engine 7.
speed.

8.

Turn the ignition key to the START position and
release the key as soon as the engine starts. Do
not hold the key in the START position for more
than 15 seconds at a time. Allow at least 60
seconds between each cranking attempt to prevent
overheating of the starter motor. Prolonged cranking
can damage the starter motor and shorten battery
life.

To steer the mower left while traveling forward, pull the left
steering lever back. The further the lever is pulled back,
the quicker the mower will turn left.

To steer the mower right while traveling forward, pull the
right steering control lever back. The further the lever is
pulled back, the quicker the mower will turn right.

- NOTE -

Smooth operation of the steering levers will
produce smooth mower operation. While learning
the operation of the steering controls, keep the
travel speed low.

15

R

Section 4

390S0138

PULL UP TO ENGAGE

PUSH DOWN TO DISENGAGE

- IMPORTANT -

Do not travel forward over a curb. The mower will
hang up on the curb. Raise the deck and travel
backwards over the curb at a 45 degree angle.
(See Section 4.1, items 13 - 15, on page 14 for
cutter deck raising descriptions.)

REVERSE TRAVEL

CAUTION

Disengage power to the mower before backing
up. Do not mow in reverse unless absolutely
necessary and then only after observation of the
entire area behind the mower.

CAUTION

To stop the reverse travel, allow the steering control levers
to return to the neutral position. If the mower is to be
parked, place the handles in the neutral lock position and
engage the parking brake.

ENGAGING THE DECK DRIVE (CUTTER 4.6

BLADES)

Set the throttle at about 3/4 speed. Do not attempt to 1.
engage the deck drive at high speed as this shortens
the electric clutch life — use only moderate engine
speed when engaging the deck drive.

Engage the deck drive by pulling out on the yellow 2.
switch, located on the instrument panel, to the
engage position. See Figure 4-3.

Before backing up, observe the rear for persons
and obstructions. Clear the area before backing
up. Possible injury or property damage could
occur.

To travel in reverse, pull levers inward out of the neutral
lock position and pull both handles back. Keep the travel
speed low while traveling in reverse.

- NOTE -

The mower may not travel straight in reverse.
Slight adjustments may need to be made using
the steering controls.

To steer left while traveling in reverse, allow the left
steering control lever to move forward. The further the
control is allowed to move forward, the quicker the mower
will turn left.

To steer right while traveling in reverse, allow the right
steering control lever to move forward. The further the
control is allowed to move forward, the quicker the mower
will turn right.

Cutter Engage SwitchFigure 4-3.

- NOTE -

A squealing noise may be heard when engaging
or disengaging the deck drive. It is caused by the
electric clutch plates meshing as the mower comes
up to speed. This is normal.

To disengage the deck drive, push the switch in to 3.
the disengage position.

Always operate the engine at full throttle to properly 4.
maintain cutting speed. If the engine starts to lug
down, reduce the forward speed and allow the
engine to operate at maximum RPM.

16

R

Section 4

HILLSIDE OPERATION4.7

WARNING

DO NOT operate on steep slopes. To check a slope,
attempt to back up it (with the cutter deck down).
If the machine can back up the slope without the
wheels slipping, reduce speed and use extreme
caution. Under no circumstances should the
machine be operated on slopes greater than 15
degrees. See Figure 2-4, Page 7 to help determine
approximate slope of area to be mowed. ALWAYS
FOLLOW OSHA APPROVED OPERATION.

This mower has been designed for good traction 1.
and stability under normal mowing conditions.
However, caution must be used when traveling on
slopes, especially when the grass is wet. Wet grass
reduces traction and steering control. The Roll-Over
Protection System is standard equipment for this
machine. See Section 2.5, page 6 of this manual for
further details.

AFTER OPERATION4.9

Wash the entire mower after each use. Do not 1.
use high pressure spray or direct the spray onto
electrical components.

- IMPORTANT -

Do not wash a hot or running engine. Cold water
will damage the engine. Use compressed air to
clean the engine if it is hot.

Keep the entire mower clean to inhibit serious heat

2.
damage to the engine or hydraulic oil circuit.

Check the drive belts for proper alignment and any 3.
signs of wear. Correct and adjust if necessary.

DANGER

To avoid injury from burns, allow the mower
to cool before removing the fuel tank cap and
refueling.

Stay two cut widths away from slopes, drop offs, 2.
ditches and retaining walls.

To prevent tipping or loss of control, do not start or 3.
stop suddenly, avoid unnecessary turns and travel
at reduced speed. If tires loose traction, disengage
blades and proceed slowly off the slope.

Avoid sudden starts when mowing uphill. Sudden 4.
starts may cause the machine to tip backwards.

Loss of traction may occur when traveling down hill. 5.
Weight transfers to the front of the machine and
may cause the drive wheels to slip causing loss of
braking or steering.

Keep tires properly inflated.6.

PARKING THE MOWER4.8

Park the machine on a flat, level surface only. Do not 1.
park the machine on an incline.

Place the steering control levers in the neutral 2.
position.

Disengage the cutter blades.3.

Slow the engine to idle speed.4.

Engage the parking brake.5.

Turn the ignition key to the OFF position and remove 6.
the key.

4.

After the mower has cooled down, fill the fuel tank
with fresh, clean fuel at the end of every day of
operation. See Engine Owner's Manual for proper
octane requirements.

Check the tire pressure. Adjust pressure if 5.
necessary.

REMOVING CLOGGED MATERIAL4.10

DANGER

ROTATING BLADES

NEVER PUT YOUR HANDS INTO THE DISCHARGE
CHUTE FOR ANY REASON!

Shut off the engine and remove the key and
only then use a stick or similar object to remove
material if clogging has occurred.

1.

If the discharge chute becomes clogged, shut off
the engine and remove the ignition key. Using a stick
or similar item, dislodge the clogged material. Then
resume normal mowing.

17

R

MOVING MOWER WITH ENGINE 4.11

390S141-1

DUMP VALV E
CONTROL

CUTTING

HEIGHT

6

5.5

5

4.5

4

3.5

3

2.5

2

1.5

1

48

1

5

4

3

390S0140-2

HEIGHT ADJUSTMENT PEDAL

LANYARD
PIN

STOPPED

To “free-wheel” or move the mower around without the
engine running, rotate the dump valve levers counter­clockwise. See Figure 4-4. Disengage the parking brake
and move the mower by hand. When the machine is in the
desired position, engage the parking brake and rotate the
levers clockwise until they stop. The dump valve levers
must be returned to the DRIVE position and torqued to
10 lb-ft to drive the mower.

Section 4

4.

Keep mower and discharge chute clean.

When mowing wet or tall grass, mow the grass twice. 5.
Raise the mower to the highest setting for the first
pass and then make a second pass to the desired
height.

Use a slow travel speed for trimming purposes.6.

Operate the engine at full throttle for best cutting. 7.
Mowing with a lower RPM causes the mower to tear
the grass. The engine is designed to be operated at
full speed.

Use the alternate stripe pattern for best lawn 8.
appearance. Vary the direction of the stripe each
time the grass is mowed to avoid wear patterns in
the grass.

ADJUSTING CUTTING HEIGHT4.13

The mower deck can be adjusted from a height of 1.0 inch
to 6.0 inches at 1/4-inch intervals. To adjust the cutting
height:

DO NOT operate without Discharge Chute,
Mulching Kit, or entire Grass Catcher properly
installed.

Dump Valve ControlFigure 4-4.

RECOMMENDATIONS FOR MOWING4.12

Do not mow with dull blades. A dull blade will tear 1.
grass, resulting in poor lawn appearance and
reduced mowing power.

WARNING

The discharge chute must not be removed and 2.
must be kept in the lowest position to deflect grass
clippings and thrown objects downward. Direct the
side discharge away from sidewalks or streets to
minimize cleanup of clippings. When mowing close
to obstacles, direct the discharge away from the
obstacles to reduce the chance of property damage
by thrown objects.

WARNING

DO NOT adjust the cutting height with the mower
blades rotating. Disengage the power to the cutter
blades and then adjust cutting height.

1.

Disengage the power to the cutter blades.

Push the cutting height adjustment foot pedal all 2.
the way forward using your right foot until it locks in
place. See Figure 4-5.

Cut grass when it is dry and not too tall. Do not cut 3.
grass too short (cut off 1/3 or less of existing grass
for best appearance). Mow frequently.

Adjusting Cutting HeightFigure 4-5.

18

R

Section 4

CUTTING

HEIGHT

6

5.5

5

4.5

4

3.5

3

2.5

2

1.5

1

481543

390S0151-1

DECK RELEASE
LEVER

TENSION
KNOB

TENSION
KNOB

ROTAT E
LEVER

CUTTING

HEIGHT

6

5.5

5

4.5

4

3.5

3

2.5

2

1.5

1

481

5

4

3

390S0140-2

HEIGHT ADJUSTMENT PEDAL LOCATIONS

Insert the lanyard pin into the cutting height index at 3.
the desired cutting height. Push forward on the deck
lift foot lever, hold in place and pull back on the deck
release lever. See Figure 4-6. Slowly release the foot
pedal. A deck height decal is located on the cutting
height index as an aid in adjusting the deck to the
desired height. See Figure 4-5.

Adjusting Steering LeversFigure 4-7.

4.

The control handle can also be adjusted in two
different positions. If necessary, remove the two
bolts securing the control handle to the control lever.
Install the handle in the desired position.

ADJUSTING THE STEERING LEVERS4.14

Position the seat to the desired location.1.

While in the operator's position without the engine 2.
running, move both steering levers forward and
reverse to check for full function control and comfort.

If adjustment of the steering levers is needed, use 3.
the following instructions to adjust.

A. Loosen the tension knob on the lever assembly.

B. Rotate the steering lever forward or backward to
achieve the optimum operating position.

C. Tighten the tension knob and repeat on the opposite
side.

D. While in the operator's position, bring the steering
levers out of the neutral lock position and check to
make sure both levers are even before operating.

ADJUSTING THE HEIGHT ADJUST 4.15

PEDAL

Deck Release LeverFigure 4-6.

Position the seat to the desired location.1.

While in the operator's position without the engine 2.
running, push down on the height adjust pedal to
check for full function control.

The height adjust pedal can be located in three (3) 3.
different positions for operator comfort and control.
See Figure 4-8.

Height Adjust Pedal LocationsFigure 4-8.

19

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TOWING (OPTIONAL HITCH 4.16

ACCESSORY)

NEVER allow children or others in or on towed 1.
equipment.

Tow only with a machine that has a hitch designed

2.
for towing. Do not attach towed equipment except at
the hitch point.

Follow manufacturer's recommendations for weight 3.
limit for towed equipment. 250 lbs. maximum towing
weight.

4.

NEVER tow on slopes. The weight of the towed
equipment may cause loss of traction and loss of
control.

Travel slowly and allow extra distance to stop.5.

Zero-turning with a trailer attached could cause 6.
damage to the trailer or mower.

Section 4

20

R

Section 5

Width of Deck

SGB020

Width of Deck

SGB018

Width

of

Deck

Width

of

Deck

SGB019

CONDITION CAUSE CURE

TROUBLESHOOTING CUTTING CONDITIONS

STRINGERS - OCCASIONAL
BLADES OF UNCUT GRASS

STR E A K ING - STRI P S OF
UNCUT GRASS IN CUTTING
PATH

Low engine RPM Run engine at full RPM

Ground speed too fast Slow speed to adjust for conditions

Wet grass Cut grass after it has dried out

Dull blades, incorrect sharpening Sharpen blades

Deck plugged, grass accumulation Clean underside of deck

Belts slipping Adjust belt tension

Dull, worn blades Sharpen blades

Incorrect blade sharpening Sharpen blades

Low engine RPM Run engine at full RPM

Belt slipping Adjust belt tension

Deck plugged, grass accumulation Clean underside of deck

STR E A K ING - STRI P S OF
UNCUT GRASS BETWEEN
CUTTING PATHS

Ground speed too fast Slow speed to adjust for conditions

Wet grass Cut grass after it has dried out

Bent blades Replace blades

Not enough overlapping between rows Increase the overlap of each pass

21

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Width of Deck

SGB020

Width of Deck

SGB021

Width of Deck

SGB023

TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)

CONDITION CAUSE CURE

Section 5

U N E V E N C U T O N F L AT
GROUND - WAVY HIGH-LOW
APPEARANCE, SCALLOPED
CUT, OR ROUGH CONTOUR

UNE V EN CUT ON UNEVE N
GROUND - WAVY APPEARANCE,
HIGH-LOW SCALLOPED CUT,
OR ROUGH CONTOUR

Lift worn from blade Replace blade

Blade upside down Mount with cutting edge toward ground

Deck plugged, grass accumulation Clean underside of deck

Too much blade angle (deck pitch) Adjust pitch and level

Deck mounted improperly See your authorized SCAG dealer

Bent spindle area See your authorized SCAG dealer

Dull blade Sharpen blade

May need to reduce ground speed, raise

Uneven ground

cutting height, and/or change direction
of cut

SLOPI N G R I D GE AC ROSS
WIDTH OF CUTTING PATH

Tire pressures not equal Check and adjust tire pressure

Wheels uneven Check and adjust tire pressure

Deck mounted incorrectly See your authorized SCAG dealer

Deck not level side-to side Check for level and correct

22

R

Section 5

Width of Deck

SGB022

Width of Deck

SGB024

Width of Deck

SGB025

TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)

CONDITION CAUSE CURE

SCALPING - BLADES HITTING
DIRT OR CUTTING VERY CLOSE
TO THE GROUND

STEP CUT - RIDGE IN CENTER
OF CUTTING PATH

Low tire pressures Check and adjust pressures

Ground speed too fast Slow speed to adjust for conditions

May need to reduce ground speed, raise

Cutting too low

cutting height, change direction of cut,
and/or change pitch and level

May need to reduce ground speed, raise

Rough terrain

cutting height, and/or change direction
of cut

Ground speed too fast Slow speed to adjust for conditions

Wet grass Cut grass after it has dried out

Blades not mounted evenly Adjust pitch and level

Bent blade Replace blade

Internal spindle failure See your authorized SCAG dealer

SLOPE CUT - SLOPING RIDGES
ACROSS WIDTH OF CUTTING
PATH

Mounting of spindle incorrect See your authorized SCAG dealer

Bent spindle mounting area See your authorized SCAG dealer

Internal spindle failure See your authorized SCAG dealer

Bent deck housing See your authorized SCAG dealer

23

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ADJUSTMENTS

390S0152-1

LOOSEN HERE

2" to 2-1/4" Clearance

390S0153-1

LOOSEN
HERE

1/8"

Section 6

PARKING BRAKE ADJUSTMENT6.1

WARNING

Do not operate the mower if the parking brake
is not operable. Possible severe injury could
result.

The parking brake linkage should be adjusted whenever
the parking brake lever is placed in the “ENGAGE” position
and the parking brake will allow the mower to move. If the
following procedures do not allow you to engage the parking
brake properly, contact your Scag dealer for further brake
adjustments.

Position a floor jack under the rear of the machine. 1.
Raise the machine and support it to prevent it
from falling. Block the caster wheels to prevent the
machine from moving. Remove the drive wheels.

With the brake lever in the disengaged position,

2.
check the distance between the top of the frame
tube and the bottom of the brake handle. The
distance should be 2" to 2-1/4". See Figure 6-1.

- NOTE -

If this procedure does not achieve proper brake
adjustment, please contact your authorized Scag
dealer.

Brake AdjustmentFigure 6-1.

If the distance is not at the specified measurement, 3.
adjust by loosening the jam nuts at both ends of the
brake control rod and turning the rod until the proper
distance is achieved. Tighten the jam nuts. See
Figure 6-1.

4.

With the brake in the engaged position, check
the distance between the lower nut on the brake
actuator rod and the brake actuator lever on the LH
side of the machine. The distance should be 1/8".
See Figure 6-2.

If the distance is not at the specified measurement,

5.
loosen the jam nut at the clevis on the top of the
brake actuator rod. See Figure 6-2.

Turn the bolt at the bottom of the brake actuator lever 6.
until the 1/8" measurement is achieved and tighten
the jam nut at the clevis on the brake actuator rod.
See Figure 6-2.

Repeat steps 4 though 6 on the RH side of the 7.
machine.

Replace the drive wheels and test the brake.8.

Brake Rod AdjustmentFigure 6-2.

24

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Section 6

390S0149-1

CONTROL

ROD

LOOSEN

HERE

STT99RHCRA

LOOSEN HERE

ADJUST HERE

390S0147-1

LOOSEN

HERE

390S0146

LOOSEN HERE

ADJUST HERE

TRAVEL ADJUSTMENTS6.2

Neutral or tracking adjustments will need to be made if:

A. The steering control levers are in the neutral position
and the machine creeps forward or backward. See
Neutral Adjustment on page 25 (next procedure).

B. The steering control levers are in the full forward
position and the mower pulls to one side or the other
when traveling in a forward direction. See Tracking
Adjustment on page 26.

NEUTRAL ADJUSTMENT

Be sure the dump valve levers are in the run position 1.
and the steering control levers are in the neutral lock
position.

2.

With an operator in the seat, start the engine and
disengage the parking brake.

Run the engine at full operating speed and check if 3.
the machine creeps forward or backwards.

Adjust the RH wheel by loosening the jam nuts on 4.
the steering control rod and turning the rod until the
drive wheel turns in the forward direction. Turn the
rod back until the drive wheel stops moving. Turn the
rod an additional 1/2 turn. See Figure 6-3.

RH Steering Control Rod AdjustmentFigure 6-3.

Tighten the jam nuts and repeat for the LH wheel. 5.
See Figure 6-4.

LH Steering Control Rod AdjustmentFigure 6-4.

25

R

Section 6

Actuate the steering control levers forward and 6.
reverse several times and return them to the neutral
position.

Check that the drive wheels remained in neutral and

7.
readjust if necessary.

Check that the steering control levers hit the stop 8.
before the pumps reach full stroke. Adjust as
needed.

TRACKING ADJUSTMENT

CAUTION

Stop the engine and remove the key from the
ignition before making any adjustments. Wait
for all moving parts to come to a complete stop
before beginning work.

- NOTE -

If after making the adjustment as outlined in step
1A, the machine creeps forward or backward,
perform the neutral adjustment. See Neutral
Adjustment on page 25.

2.

If at full speed the mower pulls left, it is an indication
that the right wheel is turning faster than the left
wheel. To adjust this condition, proceed as follows:

A. Stop the machine and place the steering control
levers in the neutral position. Loosen the lock nuts
securing the ball joints at each end of the RH steering
control rod. Rotate the control rod to lengthen the rod
and tighten the lock nuts. This will cause the control
rod to stroke the RH pump less, slowing down the RH
wheel. See Figure 6-3.

- NOTE -

If after making the adjustment as outlined in step
2A, the machine creeps forward or backward,
perform the neutral adjustment. See Neutral
Adjustment on page 25.

CAUTION

The engine and drive unit can get hot during
operation causing burn injuries. Allow engine
and drive components to cool before making any
adjustments.

- NOTE -

Before proceeding with this adjustment, be sure
that the caster wheels turn plus pivot freely and
that the tire pressure in the drive wheels is correct.
If the tire pressure is not correct, the machine will
pull to the side with the lower pressure.

If at full speed the mower pulls right, it is an

1.
indication that the left wheel is turning faster than
the right wheel. To adjust this condition, proceed as
follows:

A. Stop the machine and place the steering control
levers in the neutral position. Loosen the lock nuts
securing the ball joints at each end of the LH steering
control rod. Rotate the control rod to lengthen the rod
and tighten the lock nuts. This will cause the control
rod to stroke the LH pump less, slowing down the LH
wheel. See Figure 6-4.

THROTTLE CONTROL AND CHOKE 6.3

ADJUSTMENTS

These adjustments must be performed by your Scag dealer
to ensure proper and efficient running of the engine. Should
either need adjustment, contact your authorized Scag
service center.

BELT ADJUSTMENT6.4

WARNING

Before removing any guards, shut the engine off
and remove the ignition key.

All drive belts are spring loaded and self-tensioning,
however after the first 2, 4, 8 and 10 hours of operation,
the belts should be checked for proper alignment and wear.
Thereafter, check the belts after every 40 hours of operation
or weekly, whichever occurs first.

26

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Section 6

LOOSEN
HERE

ADJUST
HERE

390S0174-1

JAM NUT
ADJUST HERE

BELT ALIGNMENT6.5

Belt alignment is important for proper performance of
your Scag mower. If you experience frequent belt wear
or breakage, see your authorized Scag service center for
belt adjustment.

2.

Loosen the two (2) elastic stop nuts. Adjust the bolt
up or down on the adjustment bracket to adjust
the cutter deck until the distance from the bottom
of the cutter deck to the floor is the same as the
measurement on the RH side of the machine.

Tighten the two (2) elastic stop nuts to secure the

3.
cutter deck in the proper position.

CUTTER DECK ADJUSTMENTS6.6

Cutter deck level, pitch and height are set at the factory.
However, if these adjustments should ever need to be
made, the following procedures will aid in obtaining the
proper cutter deck adjustment.

- NOTE -

Before proceeding with the cutter deck adjustments,
be sure that all tires are properly inflated.

CUTTER DECK LEVEL

The cutter deck should be level from side-to-side for
proper cutting performance. To check for level, be sure
that the mower is on a flat, level surface, the tires are
properly inflated and the cutter deck is set at the most
common cutting height that you will use. On the RH side
of the machine, check the distance from the top of the
cutter deck to the floor. Next check the distance from the
top of the cutter deck to the floor on the LH side of the
machine. Both measurements should be the same. If the
two measurements are different, the cutter deck level must
be adjusted as follows:

CUTTER DECK PITCH

The pitch of the cutter deck should be equal between
the front and rear of the cutter deck for proper cutting
performance. To check for proper deck pitch, be sure
that the mower is on a flat, level surface and the tires are
properly inflated.

Check the distance from the top of the cutter deck to the
floor at the rear RH side of the cutter deck directly behind
the cutter deck hanging chains. Next check the distance
from the top of the cutter deck to the floor at the front RH
side of the cutter deck directly in front of the cutter deck
hanging chains. The measurement at the front of the cutter
deck should be the same as the rear of the deck. Make
these measurements at the LH side of the cutter deck also.
If the measurement at the front of the deck is not the same,
the cutter deck pitch must be adjusted as follows:

1.

Loosen the jam nut on both adjusting rods. See
Figure 6-6.

On the front LH side of the cutter deck locate the 1.
cutter deck level adjusting bracket. See Figure 6-5.

Cutter Deck Level AdjustmentFigure 6-5.

27

Cutter Deck Level AdjustmentFigure 6-6.

2.

Using a wrench on the jam nut turn the adjusting
rods until the proper pitch is obtained on both the RH
and the LH side of the cutter deck. Tighten both jam
nuts. See Figure 6-6.

R

- NOTE -

390S014A-2

CUTTING

HEIGHT

6

5.5

5

4.5

4

3.5

3

2.5

2

1.5

1

4

8

154

3

HEIGHT ADJUSTMENT PEDAL

LANYARD
PIN

LOOSEN HERE

1/4"

DECK
STOP

390S0175-1

To prevent the cutter deck from teetering, all four
(4) cutter deck hanging chains must have tension
on them. If all four chains do not have tension on
them and the deck teeters, you must readjust the
cutter deck as outlined in the procedures above.
All measurements should be taken from the top
edge of the deck as the Velocity Plus decks have
an uneven bottom edge.

CUTTER DECK HEIGHT

The cutter deck height adjustment is made to ensure that
the cutter deck is cutting at the height indicated on the
cutting height index gauge. To check for proper deck height,
be sure that the mower is on a flat, level surface and the
tires are properly inflated.

Place the cutter deck in the transport position. 1.
Loosen the jam nuts on both ends of the deck height
control rod. See Figure 6-7.

Section 6

Cutter Deck StopFigure 6-8.

Check the cutter deck cutting height by placing the 3.
lanyard pin in the 3" position on the cutting height
index. Release the deck from the transport position
and allow the deck to move to the 3" cutting height
position.

Cutter Deck Height AdjustmentFigure 6-7.

Turn the control rod (See Figure 6-7) until there is a 2.
1/4" space between the rear deck stop and the top of
the cutter deck. See Figure 6-8. Tighten the jam nuts
on the control rod.

Check the measurement from the floor to the 4.
cutter blade tip. If the measurement is not at 3",
an adjustment can be made using the deck height
control rod. See Figure 6-7.

- NOTE -

If an adjustment had to be made, be sure that the
cutter deck can easily be locked into the transport
position.

CUSTOM-CUT BAFFLE ADJUSTMENT6.7

The Custom-Cut Baffle is designed to deliver optimum
airflow and superior cutting performance in any type of
grass. The Custom-Cut Baffle can be raised or lowered
to precisely tailor the deck's performance for the type of
grass being cut. The baffle can be set in seven (7) different
positions for optimum performance.

A. 3-1/2" or 3-3/4" Position - (See Figure 6-9). For very
tall, wiry or tough-to-cut grass.

B. 4" (factory setting), 4-1/4" or 4-1/2" Position - (See
Figure 6-9). For general purpose cutting. This gives the
best mix of cutting performance in all types of grass.

28

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Section 6

1

2

3

4

A
B

1

2

3

4

A

B

Custom-Cut Baffle Adjustment

Mounting Slot Selected Mounting Hardware Location

Slot “A” Hole 1 Hole 2 Hole 3 Hole 4
Height (inches) 3-3/4” 4-1/4” 4-3/4” 5-1/4”

Slot “B” Hole 2 Hole 3 Hole 4
Height (inches) 3-1/2” 4” 4-1/2”

C. 4-3/4" or 5-1/4" Position - (See Figure 6-9). Placing
the baffle in either the 4-3/4" or 5-1/4" setting will
enhance fall cutting (leaf pickup) and reduce cutter
deck "blowout".

To adjust the Custom-Cut Baffle height:

Place the cutter deck in the transport position.1.

Remove the hardware securing the Custom-Cut 2.
Baffle to the cutter deck.

- NOTE -

Hardware location used in the illustrations are for
reference only. Location of hardware may vary
depending on cutter deck size.

3.

Move the Custom-Cut Baffle to desired position. See
Figure 6-9.

Reinstall the mounting hardware. Torque hardware to 4.
39 lb-ft.

7-Position Custom-Cut Baffle AdjustmentFigure 6-9.

29

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ELECTRIC CLUTCH ADJUSTMENT6.8

INSPECTION WINDOW (x3)

ADJUSTMENT NUTS

ADJUSTMENT NUTS

The electric clutch serves two functions in the operation of
the mower. In addition to starting and stopping the power
flow to the cutter blades, the clutch also acts as a brake to
assist in stopping blade rotation when the PTO is switched
off or the operator presence circuit is interrupted.

When the clutch is disengaged, the air gap between the
armature and rotor must be adjusted to fifteen thousandths
of an inch, 0.015, for proper operation. The airgap
adjustment is made at three bolts on the clutch. There are
three inspection windows, one next to each adjusting bolt.
See Figure 6-10.

Section 6

Clutch Air Gap AdjustmentFigure 6-10.

Locate the inspection windows on the clutch.1.

Place a 0.015 feeler gauge in the slot between the 2.
rotor and the armature.

Tighten or loosen the adjusting bolt as needed to 3.
acheive the 0.015 inch airgap. See Figure 6-11.
Perform this operation at all three inspection
windows.

Clutch Air Gap AdjustmentFigure 6-11.

This adjustment should be done every 500 hours of
operation or annually, whichever comes first. In cases
where the machine is heavily used, airgap settings should
be checked more often.

If the air gap is too narrow, the clutch armature may drag
when disengaged, resulting in premature failure.

If the air gap is too wide, the clutch may be slow to engage
as the magnet must pull the armature in from a greater

distance.

30

R

Section 7

MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS7.1

BREAK-IN
(FIRST 10)

X

MAINTENANCE

HOURS

PROCEDURE COMMENTS

8 20 40 100 200 500

Check all hardware for tightness

X

X

X

X

X

X

X

X

X

X

X

X

Check hydraulic oil level See paragraph 7.3

C h e ck al l b e l t s f o r p r o p e r
alignment

Check coolant level See paragraph 7.11

Check hydraulic fittings and hoses
for leaks

Check engine oil level See paragraph 7.4

*Clean mower See paragraph 7.12

Check condition of blades See paragraph 7.9

Apply grease to fittings See paragraph 7.2

Check tire pressure See paragraph 7.10

Ins p e c t s eat be l t fo r we a r o r
damage

Che c k the op e rat o r in t e r l o ck
system

Check coolant level See paragraph 7.11

See paragraph 7.8

Use extreme caution when
checking the hydraulic hoses.
See paragraph 2.6

See paragraph 2.5

See paragraph 4.2

X

X

X

X

X

X

X

X

* Perform these maintenance procedures more frequently under extreme dusty or dirty conditions

Change engine oil and filter See paragraph 7.4

Ch eck batt er y electro lyte level
clean battery posts and cables

Check belts for proper alignment See paragraph 7.8

Apply grease to fittings See paragraph 7.2

Change engine oil See paragraph 7.4

*Clean air cleaner element See paragraph 7.6

Che ck l u bricant i n cutt e r deck
gearbox

Check condition of fuel lines

See paragraph 7.7

See paragraph 7.11

31

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MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS (CONT'D)

HOURS

BREAK-IN
(FIRST 10)

8 40 100 200 500

X

Apply grease to fittings See paragraph 7.2

PROCEDURE COMMENTS

Section 7

X

X

X

Check hardware for tightness

Change engine oil filter See paragraph 7.4

Check hydraulic oil level See paragraph 7.3

Replace engine fuel filter See paragraph 7.5

X

Drain hydraulic system and replace

X

hydraulic oil

Replace hydraulic oil filter See paragraph 7.3

X

Rep l a c e c utt e r deck g e arb ox

X

lubricant

Change coolant See paragraph 7.11

X

Use SAE 20W50 Motor Oil.
See paragraph 7.3

See paragraph 7.11

LUBRICATION7.2

GREASE FITTING LUBRICATION CHART (SEE FIGURE 7-1)

LOCATION LUBRICATION INTERVAL LUBRICANT

1 Caster Wheel Pivot * 500 Hours/Yearly Chassis Grease 2

2 Caster Wheel Bearings 100 Hours/Monthly Chassis Grease 2

3 Brake Actuator 200 Hours/Monthly Chassis Grease 2

4 Cutter Deck Bellcranks 100 Hours/Bi-Weekly Chassis Grease 4

5 Cutter Deck Pusharms 100 Hours/Bi-Weekly Chassis Grease 2

6 PTO Spindle 40 Hours/Weekly +Lithium MP White Grease 2125 1

7 Cutter Deck Spindle 40 Hours/Weekly +Lithium MP White Grease 2125 3

8 Brake Handle 200 Hours/Monthly Chassis Grease 1

9 Cutter Deck Drive Shaft U-Joints 200 Hours/Monthly Chassis Grease 2

10 Cutter Deck Drive Shaft Slip Sleeve 40 Hours/Weekly Chassis Grease 1

NO. OF

PLACES

+ Compatible Greases: Mobilix #2 found at Mobil Service Stations
Ronex MP found at Exxon Service Stations
Super Lube MEP #2 & Super Stay-M #2 found at Conoco Stations
Shell Alvania #2 found at Shell Service Stations
Lidok EP #2 found at industrial shops
Timken Lithium Multi-Use #2 found at industrial shops

* PROCEDURE: Remove grease cap, part number 481559. Remove plug, part number 482028-01, and install grease
zerk. Apply grease to the fitting until new grease appears at the top of the caster extension. Remove the grease
zerk and reinstall the plug. Reinstall the grease cap. Special tool, part number 47007, is recommended for use in the
installation of the grease cap.

32

R

Section 7

GREASE FITTING LUBRICATION

LUBRICANT / INTERVAL

LITHIUM MP WHITE GREASE 2125
( 40 HOURS / WEEKLY )

CHASSIS GREASE
( 100 HOURS / BI-MONTHLY )

CHASSIS GREASE
( 200 HOURS / MONTHLY )

4

1

6

3

5

7

2

CHASSIS GREASE
( 500 HOURS / YEARLY )

390S0145-1

1

8

4 3 9

5

9

2

Lubrication Fitting PointsFigure 7-1.

33

R

Section 7

390S0155-1

HYDRAULIC
OIL FILTER

Hydraulic Oil
Reservoir

STT99HOR-1

HYDRAULIC SYSTEM7.3

A. CHECKING HYDRAULIC OIL LEVEL

The hydraulic oil level should be checked after the first 10
hours of operation. Thereafter, check the oil after every
200 hours of machine operation or monthly, whichever
occurs first.

- IMPORTANT -

If the oil level is consistently low, check for leaks
and correct immediately.

1.

Wipe dirt and contaminants from around the
reservoir cap. Remove the cap from the hydraulic oil
reservoir.

Visually check the level of hydraulic oil. Hydraulic 2.
oil must be at least 3" inches from top of the filler
neck. If the level cannot be determined visually,
use a clean tape measure to check the level. If the
fluid is low, add 20W50 motor oil. DO NOT overfill;
(overfilling the oil reservoir may cause oil seepage
around the cap area).

- IMPORTANT -

The hydraulic oil should be changed if you notice
the presence of water or a rancid odor to the
hydraulic oil.

1.

Park the mower on a level surface and stop the
engine.

Place a suitable container under the hydraulic oil 2.
filter. Remove the fill cap from the reservoir and the
drain plug from the bottom of the drain tee fitting on
the filter base. See Figure 7-3. Allow the fluid to drain
into the container and properly discard it.

Clean the fill cap and install it onto the reservoir.3.

Hydraulic Oil ReservoirFigure 7-2.

B. CHANGING HYDRAULIC OIL

The hydraulic oil should be changed after every 500 hours
or annually, whichever occurs first. The oil should also
be changed if the color of the fluid has become black or
milky. A black color and/or a rancid odor usually indicates
possible overheating of the oil, and a milky color usually
indicates water in the hydraulic oil.

Hydraulic Oil FilterFigure 7-3.

Re-install the drain plug into the tee fitting and be 3.
sure it is tight.

- NOTE -

Before refilling the hydraulic oil reservoir the
hydraulic oil filter should be changed as outlined
in Procedure C "Changing Hydraulic Oil Filter
Element" on page 35.

Fill the reservoir to 3-1/4" inches from the top of the 4.
filler neck with 20W50 motor oil.

Replace the reservoir fill cap. Start the engine and 5.
drive forward and backward for two minutes. Check
the oil level in the reservoir. If necessary, add oil to
the reservoir.

34

R

Section 7

STT99CEC

ENGINE OIL FILTER

DRAIN
PLUG

390S0156

ENGINE OIL

DIPSTICK

C. CHANGING HYDRAULIC OIL FILTER
ELEMENT

The hydraulic oil filter should be changed after every 500
hours of operation or annually, whichever occurs first.

Remove the oil filter element and properly discard it. 1.
See Figure 7-3. Fill the new filter with clean oil and
install the filter. Hand tighten only.

Run the engine at idle speed with the speed control 2.
lever in neutral for five minutes.

Check the oil level in the hydraulic tank. It must 3.
be 3-1/4" inches from the top of the filler neck. If
necessary, add SAE 20W50 motor oil.

ENGINE OIL7.4

Engine Oil Fill/Dipstick LocationFigure 7-4.

A. CHECKING ENGINE CRANKCASE OIL LEVEL

The engine oil level should be checked after every 8 hours
of operation or daily as instructed in the Engine Operator’s
Manual furnished with this mower.

B. CHANGING ENGINE CRANKCASE OIL

After the first 20 hours of operation, change the engine
crankcase oil and replace the oil filter. Thereafter,
change the engine crankcase oil after every 100 hours of
operation or bi-weekly, whichever occurs first. Refer to the
Engine Operator’s Manual furnished with this mower for
instructions. See Figure 7-5.

Drain Plug and Oil Filter LocationFigure 7-5.

C. CHANGING ENGINE OIL FILTER

After the first 20 hours of operation, replace the engine
oil filter. Thereafter, replace the oil filter after every 200
hours of operation or every month, whichever occurs first.
Refer to Engine Operator’s Manual for instructions. See
Figure 7-5.

ENGINE FUEL SYSTEM7.5

DANGER

To avoid injury from burns, allow the mower
to cool before removing the fuel tank cap and
refueling.

A. FILLING THE FUEL TANK

Fill the fuel tank at the beginning of each operating day.
For EPA Phase 2 (produced prior to 1/1/2011) models,
fill to within one (1) inch below the filler neck. For Low
Emis s i o n (LE) and EPA Phase 3 (produ c e d a fter
1/1/2011) models, fill to the bottom of the filler neck insert
(approximately 8-1/2 gallons indicating Full (F) on the fuel
gauge) at the beginning of each operating day. See Figure
7-6. Do not overfill. Use clean, fresh unleaded gasoline
with a minimum octane rating of 87 and a maximum of
10% Ethanol.

DO NOT use E85 Fuel. Using E85 Fuel will cause severe
damage to the engine.

35

R

Section 7

E

F

1/4

1/2

3/4

.

.

..

.

FUEL LEVEL

FILLER NECK

INSERT

Fuel Filter
(with hose clamps
above and below)

STT99FF-1

Replace gas cap and tighten securely. For Low

10.
Emission (LE) and EPA Phase 3 (produced after
1/1/2011) models, tighten the fuel cap until it
ratchets.

B. REPLACING IN-LINE FUEL FILTER
ELEMENTS

The engine fuel filter should be replaced after every 500
hours of operation or annually, whichever occurs first. See
Figure 7-6.

1.

Close the shut-off valve.

Remove the two clamps securing the fuel filter to the 2.
fuel hose. Remove the fuel filter.

3.

Install a new fuel filter. Be sure it is installed in the
proper direction. Secure to the fuel hose using the

C.A.R.B. / EPA Phase 3 Fuel LevelFigure 7-6.

two clamps.

To avo id p erson al i njury or p roperty damag e, use
extreme care in handling gasoline. Gasoline is extremely
flammable and the vapors are explosive.

Extinguish all cigarettes, cigars, pipes and other 1.
sources of ignition.

Use only an approved gasoline container.2.

Never remove the gas cap or add fuel with the 3.
engine running. Allow the engine to completely cool
before fueling.

Never fuel the machine indoors or in an enclosed 4.
trailer.

Never store the machine or fuel container where 5.
there is an open flame, spark or pilot light such as on
a water heater or other appliances.

Never fill containers inside a vehicle or on a truck 6.
or trailer bed with a plastic liner. Always place
containers on the ground away from your vehicle
before filling.

Remove the machine from the truck or trailer and 7.
fuel on the ground. If this is not possible, then refuel
the machine with a portable container, rather than
from a gasoline dispenser nozzle.

Keep the nozzle in contact with the rim of fuel tank 8.
or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.

If fuel is spilled on clothing, change clothing 9.
immediately and wash affected skin.

Open the fuel shut-off valve.4.

Fuel FilterFigure 7-7.

ENGINE AIR CLEANER7.6

A. CLEANING AND/OR REPLACING AIR
CLEANER ELEMENT

For any air cleaner, the operating environment dictates
the air cleaner service periods. Inspect and clean the air
cleaner element after every 100 hours of operation or
bi-weekly, whichever occurs first and replace the element
if required. See Engine Owner's Manual for service
information.

36

R

Section 7

- NOTE -

In extremely dusty conditions it may be necessary
to check the element once or twice daily to prevent
engine damage.

1.

Unhook the clamps securing the air cleaner cover to
the air filter canister. Remove the air cleaner cover
and set aside.

Remove the air cleaner and inspect.2.

Clean or replace the air cleaner and foam 3.
pre-cleaner as recommended by the engine
manufacturer.

Replace the air cleaner cover and be sure to snap

4.
the latches closed.

BATTERY7.7

WARNING

Lead-acid batteries produce flammable and
explosive gases. To avoid personal injury when
checking, testing or charging batteries, DO NOT
use smoking materials near batteries. Keep arcs,
sparks and flames away from batteries. Provide
proper ventilation and wear safety glasses.

WARNING

Electric storage battery fluid contains sulfuric
acid which is POISON and can cause SEVERE
CHEMICAL BURNS. Avoid contact of fluid with
eyes, skin, or clothing. Use proper protective gear
when handling batteries. DO NOT tip any battery
beyond 45° angle in any direction. If fluid contact
does occur, follow first aid suggestions below.

BATTERY ELECTROLYTE FIRST AID

External Contact — Flush with water.

Eyes — Flush with water for at least 15 minutes
and get medical attention immediately.

Internal — Drink large quantities of water. Follow
with Milk Of Magnesia, beaten egg, or vegetable
oil. Get medical attention immediately. In case of
internal contact, DO NOT give fluids that would
induce vomiting.

A. CHARGING THE BATTERY

Re fer to t he bat tery c harger ’s manual for specif ic
instructions.

WARNING

Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to cause cancer and reproductive harm.
Wash hands after handling.

Under normal conditions the engine’s alternator will have
no problem keeping a charge on the battery. If the battery
has been completely discharged for a long period of time,
the alternator may not be able to recharge the battery,
and a battery charger will be required.

DO NOT charge a frozen battery. It may explode and
cause injury. Let the battery warm before attaching a
charger.

Whenever possible, remove the battery from the mower
before charging and make sure the electrolyte covers the
plates in all cells.

37

R

Section 7

WARNING

BATTERIES PRODUCE EXPLOSIVE GASES.
Charge the battery in a well ventilated space so
gases produced while charging can dissipate.

Charging rates between 3 and 50 amperes are satisfactory
if excessive gassing or spewing of electrolyte does not
occur or the battery does not feel excessively hot (over
125°F). If spewing or gassing occurs or the temperature
exceeds 125°F, the charging rate must be reduced or
temporarily stopped to permit cooling.

B. JUMP STARTING

The booster battery must be a 12 volt type. If a 1.
vehicle is used for jump starting, it must have a
negative ground system.

When connecting the jumper cables, connect the 2.
positive cable to the positive battery post, then
connect the negative cable to the negative battery
post.

DRIVE BELTS7.8

WARNING

Always wear proper hand and eye protection when
working with cutter blades.

Check the cutter blades for straightness. If the cutter 3.
blades appear bent, they will need to be replaced.

WARNING

Do not attempt to straighten a bent blade, and
never weld a broken or cracked blade. Always
replace it with a new blade to assure safety.

4.

If a blade cutting edge is dull or nicked, it should be
sharpened. Remove the blades for sharpening. See
"Blade Replacement."

- NOTE -

Keep the blades sharp. Cutting with dull blades not
only yields a poor mowing job, but slows the cutting
speed of the mower and causes extra wear on the
engine and the blade drive by pulling hard.

All drive belts are spring-loaded and self-tensioning,
however after the first 2, 4, 8 and 10 hours of operation,
the belts should be checked for proper alignment and
wear. Thereafter, check the belts after every 40 hours of
operation or weekly, whichever occurs first.

- NOTE -

If you experience frequent belt wear or breakage,
see your authorized Scag service center for belt
adjustment.

CUTTER BLADES7.9

A. BLADE INSPECTION

Remove the ignition key before servicing the blades.1.

Raise the mower deck to the highest position. Place 2.
the lanyard pin in the highest cutting height position
to prevent the cutter deck from falling.

B. BLADE SHARPENING

- NOTE -

If possible, use a file to sharpen the blade. Using
a wheel grinder may burn the blade.

- NOTE -

DO NOT sharpen the blades beyond 1/3 of the
width of the blade. See Figure 7-7.

Sharpen the cutting edge at the same bevel as the

1.
original. See Figure 7-7. Sharpen only the top of the
cutting edge to maintain sharpness.

38

R

Section 7

SGB033

Angle Blade Back

Do Not Cut In

X Must NOT Exceed

1/3 Blade Width

X

30

WASHER

HEX HEAD BOLT

CUTTER

BLADE

SPINDLE
ASSEMBLY

CUTTER BLADE

SPACER

HEX HEAD

BOLT / NUT

CUTTER

DECK

SPINDLE
SHAFT

HEX NUT-TORQUE
TO 75 LB-FT

Blade SharpeningFigure 7-8.

Check the balance of the blade. If the blades are out 2.
of balance, vibration and premature wear can occur.
See your authorized Scag dealer for blade balancing
or special tools, if you choose to balance your own
blades.

C. BLADE REPLACEMENT

WARNING

Always wear proper hand and eye protection when
working with cutter blades.

Remove the ignition key before replacing the blades.1.

Raise the mower deck to the highest position. Place 2.
the lanyard pin in the highest cutting height position
to prevent the cutter deck from falling.

Secure the cutter blades to prevent them from 3.
rotating, (use the optional Blade Buddy tool P/N
9212, to assist in securing the cutter blades), remove
the nut from the blade attaching bolt. Remove the
cutter blade, bolt and spacer from the spindle shaft.
See Figure 7-8.

- NOTE -

The front of the machine will have to be raised
slightly to remove the blade bolt from the cutter
spindle.

To install the new cutter blade, put the flat washer 4.
onto the blade bolt and slide the bolt into the hole in
the cutter blade.

Blade ReplacementFigure 7-9.

- NOTE -

Be sure that the blade is installed with the lift wing
toward the top.

Install the spacer onto the blade bolt and insert the 5.
bolt into the cutter spindle shaft.

Install the hex nut to the blade bolt at the top of the 6.
cutter spindle. Secure the blades from rotating and
torque to 75 lb-ft. See Figure 7-8.

TIRES7.10

Check the tire pressures after every 8 hours of operation
or daily.

Caster Wheels Flat Free
Drive Wheels 12 PSI

39

R

CUTTER DECK GEARBOX7.11

390S0161

CUTTER DECK

GEARBOX

CHECK
PLUG

Fill to Bottom of
Filler Neck

030467-13

A. CHECKING LUBRICANT LEVEL

CAUTION

The cutter deck gearbox can reach high operating
temperatures. Allow the cutter deck gearbox to
cool before servicing.

Section 7

2.

Remove the drain plug, drain the lubricant into the
container and properly discard it.

Re-install the drain plug and add SAE 80W90

3.
lubricant through the check plug hole in the gearbox
until it is level with the bottom of the check plug hole.
Install the check plug and tighten securely.

COOLING SYSTEM7.12

(LIQUID-COOLED MACHINES ONLY)

The fluid level in the cutter deck gearbox should be
checked after every 100 hours of operation or bi-weekly,
whichever occurs first.

Lower the cutter deck to to its lowest position to gain 1.
access to the cutter deck gearbox.

2.

Clean and remove the check plug from the side of
the gearbox. See Figure 7-9.

Cutter Deck GearboxFigure 7-10.

WARNING

To avoid burns, always allow the engine to cool
before removing the radiator cap.

A. CHECKING COOLANT LEVEL

The coolant level should be checked before each day of
operation.

1.

Remove the radiator cap by turning it slowly
counterclockwise to the first stop and allow any
pressure to be released. Push down on the cap and
turn counterclockwise to remove.

Visually check the coolant level. The coolant level

2.
should be up to the bottom of the filler neck as
shown in Figure 7-10. Add a mixture of coolant and
soft water as needed.

- NOTE -

Refer to the coolant manufacturer's instructions for
the proper coolant mixture ratio.

Visually check that the lubricant level is up to the 3.
bottom edge of the check plug hole. If lubricant is
low, add SAE 80W90 lubricant through the check
plug hole in the gearbox until it is level with the
bottom of the check plug hole. Install the check plug
and tighten securely.

B. CHANGING LUBRICANT

The lubricant in the cutter deck gearbox should be
changed after every 500 hours of operation or yearly,
whichever occurs first.

Place a suitable container beneath the cutter deck 1.
gearbox and locate the gearbox drain plug.

Coolant LevelFigure 7-11.

40

R

Section 7

Replace the radiator cap. Push down on the cap and 3.
turn clockwise until it stops.

- NOTE -

The cooling system should be flushed and the
coolant replaced every 500 hours of operation or
annually. See your Scag dealer for proper coolant
replacement.

B. CLEANING THE RADIATOR DEBRIS SCREEN

After each day of operation, remove and clean the radiator
debris screen.

CAUTION

To avoid personal injury, always wear safety
glasses when using compressed air.

Pull the debris screen up to remove.

1.

BODY, DECK, AND UPHOLSTERY7.13

CAUTION

Do not wash any portion of the equipment while it
is hot. Do not wash the engine; use compressed
air.

After each use, wash the mower and cutter deck. 1.
Use cold water and automotive cleaners. Do not use
pressure cleaners.

Do not spray electrical components.2.

Use a mild soap solution or a vinyl/rubber cleaner to 3.
clean the seat.

Repair damaged metal surfaces using Scag touch-

4.

up paint available from your authorized Scag dealer.
Wax the mower for maximum paint protection.

Clean the debris screen with compressed air or a 2.
water hose.

- NOTE -

Check the radiator for excessive debris and clean
with compressed air. Never spray a hot engine
with water, use only compressed air to remove
debris.

Re-install the debris screen to the radiator.3.

C. CHECKING THE FAN BELT TENSION (LIQUID­COOLED ENGINES ONLY)

Periodically check the fan belt tension. The belt should
deflect 1/2" with 10 pounds of pressure. See your Scag
dealer if the belt is in need of adjustment or replacement.

41

R

NOTES

Section 8

42

R

Section 8

ILLUSTRATED PARTS LIST

SCAG APPROVED ATTACHMENTS AND ACCESSORIES8.1

Attachments and accessories manufactured by companies other than Scag Power Equipment are not
approved for use on this machine.

Scag approved attachments and accessories:

GC-STT (p/n 9059, 9060, 9039)•

GC-STT-CS (p/n 9063, 9064, 9041)•

Mulch Plate (p/n 9287, 9288, 9262)•

Hurricane Mulch (p/n 9284, 9285, 9267)•

STT Hitch (p/n 9242)•

STT Bumper (p/n 9256)•

STT Lights (p/n 9279)•

Tiger Striper (p/n 9269)•

Blade Buddy (p/n 9212)•

43

R

52V CUTTER DECK

44 61 63

69

12

65

64

52

58

54

17

59

24

14

56

28

56

33

3

A

A

B

B

4

14 29 20

53

2852

24

58

24

52

73

66

32

13

68

55

55

29

58

2

3

23

3

11

50

13

46

60

49

67

24

35

48

9

16

19

15

27

26

12

82

51 23

23

36

37

44

39

43

42

38

45

41

34

62

22

40

37

18

10

1

5

7

68

STT 2008 CD

14

29

12

30

28

31

25

31

21

22A

47

51

12

23

70
71

22A

13

72

74

28

29

13

26

57

75

76

77

78

79

80

81

83

84

85

86

Section 8

44

R

Section 8

52V CUTTER DECK

Ref.

Part No. Description

No.

1

461859

2

04003-40

3

04019-04

4

481625-01

5

481632

6

04003-26

7

422478

8

04017-27

9

04043-06

10

04021-05

11

461845

12

04001-11
04001-12

13

04021-22

14

04020-09

15

451240

16

04001-41

17

04003-12

18

04001-108

19

04063-08

20

04063-01

21

04043-04

22

04001-176

23

04019-03

24

04001-172

25

48100-15

26

04030-03

27

04040-15

28

04041-07

29

04021-09

30

04001-62

31

04001-54

32

04001-20

33

04001-136

34

461663

35

43589

36

481024

37

481022

38

43644

39

43312

40

43296

41

481025

42

43297

43

481035

44

48114-04

45

48677

Cutter Deck Velocity Plus
Bolt, Carriage 7/16-14 x 1-1/4”
Nut, Hex Serr. Flng 3/8-16
Wing nut, 3/8-16
Anti-Scalp Wheel
Bolt, Carriage 3/8-16 x 4”
Anti-Scalp Wheel Bracket
Bolt, Hex Serr. Flng 3/8-16 x 1”
Flatwasher, 5/8” Hardened
Locknut, 3/8-16 Center Lock
Discharge Chute
Bolt, Hex Head 5/16-18 x 1-3/4” - Front
Bolt, Hex Head 5/16-18 x 1-1/2” - Rear
Nut, Hex Elastic Stop 5/16-18 Grd 8
Nut, 5/8-11 UNC
Push Arm Shaft
Bolt, HH 5/8-11 x 9-1/2”
Bolt, Carriage 5/16-18 x 3/4”
Bolt, HH 5/16-18 x 4-1/2”
Key, 1/4 x 1/4 x 2”
Key, 1/4 x 1/4 x 1-1/4”
Flatwasher,3/8” (.39 x .938 x .105”) HD
Bolt, HH 5/16-18 x 1-3/4”
Nut, Hex Serr. Flng 5/16-18
Bolt, HH 1/4-20 x 1” Grd 8
Bushing, .376” I.D. Oilite
Lockwasher, 5/16”
Flatwasher, 5/16” (.375 x .875 x .083”)
Flatwasher, 3/8” (.391 x .938 x .105”)
Nut, Hex Elastic Stop 3/8-16
Bolt, HH 3/8-16 x 3-1/4”
Bolt, HH 3/8-16 x 3”
Bolt, HH 3/8-16 x 1-1/2”
Bolt, HH 3/8-16 x 1-1/2” Grd 8
Spindle Assembly
Spindle Shaft
Seal, Top
Bearing Assembly
Spindle Housing
Spacer, Outside
Spacer, Inside
Seal, Bottom
Spindle Bushing, Bottom
Nut, Special 1-1/16-18
Grease Fitting
Relief Fitting, Tapered Spindle

Ref.

Part No. Description

No.

46

483378

47

482295

48

482878

49

482486

50

482281

51

45944

52

48926

53

48141

54

461842

55

48224

56

483215

57

461929

58

482744

59

424798

60

422412

61

461516

62

43590

63

04020-16

64

48763

65

04001-79

66

483704

67

482747

68

04110-03

69

04021-13

70

424208

72

43503

73

424840

74

04003-23

75

04040-11

76

04021-11

77

483167

78

04003-12

79

04040-04

80

04021-04

81

483176

82

48038

83

04021-10

84

43763

85

424799

86

04001-154

Spring, Discharge Chute
Wheel, Anti-Scalp
Cutter Blade, 18”
Gearbox Assm, Deck Drive
Belt, Cutter Deck Drive
Roller Shaft
Tapered Hub, 1-1/8” Bore
Tapered Hub, 1” Bore
Idler Arm, Cutter Deck
Bearings, Ball
Pulley, Idler
Lever Assembly, Deck Level (Incl. 77)
Pulley, 5.75” O.D. (52”)
Mounting Plate, RH Gearbox
Belt, Cover
Pusharm (includes items 44, 63 & 64)
Spacer, Spindle Bottom
Nut, Hex Head 5/8-18 UNF
Rod End, 5/8” Male RH Thrd
Bolt, Hex Head 5/8-11 x 4-1/2”
Spring, Cutter Deck
Pulley, 6.95” O.D.
U-Nut, 3/8-16
Nut, Hex Elastic Stop 5/8-11
Discharge Baffle 52V
Pivot, Idler - Short
Baffle, Custom Cut 52V
Bolt, Carriage 3/8-16 x 1”
Flatwasher, 7/16” (.500 x 1.25 x .083”)
Nut, Elastic Stop 7/16-14
Bolt, Deck Adjust
Bolt, Carraige 5/16-18 x 3/4”
Flatwasher, 5/16”
Nut, Center Lock 5/16-18
Wear Pad
Wheel, Anti-Scalp
Nut, Elastic Stop 5/16-18
Spacer, Gearbox Mount
Mounting Plate, LH Gearbox
Bolt, HH 5/16-18 x 4-3/4”

45

50

48

54

82

51

83

23

55

50

1

44A

84

49

R

87

86

2

11

72V Only

56

53

52

12

20

48

13

85

47

48

Section 8

61V & 72VS CUTTER DECKS

3

4

57

9

8

12

A

6

B

12

64

57

6

59

20

B

80

81

44
44A

43

42

77

65

48

68

66

67

70

75

76

73

3

10

3

4

5

11

69

14 15 16

A

71

72

73

37

23

25

30

36

35

38

34

74

39

17

21

22

18

19

20

20

23

24

26

27

14

28

29

7

59

61

7

6

3

4

7

79

78

23

5

5

7

6

11

63

61

62

58

60

57

22

30

41

40

33

31

32

STT-61V 2011 CD

46

6

7

45

46

Section 8

R

61V & 72VS CUTTER DECKS

Ref.

Part No. Description 61 72

No.

1
2

3

4
5
6

7
8
9
10

11

12
13

14
15

16
17
18

19

20

21
22
23

24
25
26
27
28
29
30
31
32
33
34
35

36

37
38
39
40
41

42

43
44

481625-01
424325
422708
422677
04001-172

04020-09
48926
04041-07

04021-09
48141
04063-0
482746
482745
482745
482747
483215
481558
481980
48114-04
461516

04020-16
04021-13
48763

04001-79

04019-03

451240
45944
04001-12

48038
461663
43589
481024
43644
43312
481022
481025
481035
43297
43296
48677

483176
483174
04040-04
04021-04
04063-08
04043-06
04001-41

482879
482881
482882
43590
04001-176

Wing Nut, 3/8-16
Belt Cover
Belt Cover RH
Belt Cover LH
Bolt, Hex Head 1/4-20 x 1”
Grd 8
Nut, 5/8-11 UNC
Tapered Hub, 1-1/8” Bore
Flatwasher, 3/8” (.391 x .938
x .105)
Nut, Hex Elastic Stop 3/8-16
Tapered Hub, 1” Bore
Key, 1/4 x 1/4 x 1-1/4”
Pulley, 6.75 O.D.
Pulley, 6.35 O.D.
Pulley, 6.35 O.D.
Pulley, 6.95 O.D.
Pulley, Idler
Belt, Cutter Deck Drive
Belt, Cutter Deck Drive
Grease Fitting
Pusharm (incl. items 14, 16,
& 18)
Nut, Hex Head 5/8-18 UNF
Nut, Hex Elastic Stop 5/8-11
Rod End, 5/8” Male RH
Thread
Bolt, Hex Head 5/8-11 x
4-1/2”
Nut, Hex Serrated Flange
5/16-18
Push Arm Shaft
Roller Shaft
Bolt, Hex Head 5/16-18 x
1-3/4”
Wheel, Anti-Scalp
Spindle Assembly
Spindle Shaft
Seal, Top
Spindle Housing
Spacer, Outside
Bearing Assembly
Seal, Bottom
Nut, Special 1-1/16-18
Spindle Bushing, Bottom
Spacer, Inside
Relief Fitting, Tapered
Spindle
Wear Pad
Wear Pad
Flatwasher, 5/16”
Nut, Center Lock 5/16-18
Key, 1/4 x 1/4 x 2”
Flatwasher, 5/8” Hardened
Bolt, Hex Head 5/8-11 x
9-1/2”
Cutter Blade, 21”
Cutter Blade, 21” (35BVAC)
Cutter Blade, 24.5”
Spacer, Spindle Bottom
Bolt, Hex Head 5/16-18 x
1-3/4”

Ref.

Part No. Description 61 72

No.

45

46
47

48

49
50
51
52
53
54
55

56
57

58
59
60
61
62
63

64

65
66
67
68
69
70
71
72
73
74

75
76
77

78
79
80
81
82

83
84

85
86
87

424841
424917
04003-23
424209
425625
424856
04021-22

482295
48100-15
481632
04021-05
422478
04003-26
04017-27

04110-03
04019-04

04001-20
04001-54
43503
48224
483704
04043-04

04001-136

461842
04003-12
04021-10
424798
482486
43763
424799
04001-154
04030-03
04040-15

04021-11
04003-12
04040-11

04001-62
04003-40
483167
461929
461863
462364
462144
483378
461846
462132
04001-108
462360
484368

X

X

X

X
X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X
X
X

X
X

X

X

X

Baffl

e, Custom Cut 61V
Baffl e, Custom Cut 72V
Bolt, Carriage 3/8-16 x 1”
Discharge Baffl e 61V
Discharge Baffl e 61V (LE)
Discharge Baffl e 72V
Nut, Hex Elastic Stop 5/16-18
Grd 8
Wheel, Anti-Scalp
Bushing, .376 I.D. Oilite
Anti-Scalp Wheel
Locknut, 3/8-16 Center Lock
Anti-Scalp Wheel Bracket
Bolt, Carriage 3/8-16 x 4”
Bolt, Hex Serrated Flange 3/8­16 x 1”
U-Nut, 3/8-16
Nut, Hex Serrated Flange
3/8-16
Bolt, Hex Head 3/8-16 x 1-1/2”
Bolt, Hex Head 3/8-16 x 3”
Pivot, Idler - Short
Bearings, Ball
Spring, Cutter Deck
Flatwasher,3/8-.39 x .938 x
.105 HD
Bolt, Hex Head 3/8-16 x 1-1/2”
Grd 8
Idler Arm, Cutter Deck
Bolt, Carriage 5/16-18 x 3/4”
Nut, Elastic Stop 5/16-18
Mounting Plate, RH Gearbox
Gearbox Assembly, Deck Drive
Spacer, Gearbox Mount
Mounting Plate, LH Gearbox
Bolt, Hex Head 5/16-18 x 4-3/4”
Lockwasher, 5/16”
Flatwasher, 5/16” (.375 x .875
x .083)
Nut, Elastic Stop 7/16-14
Bolt, Carraige 5/16-18 x 3/4”
Flatwasher, 7/16-.500 x 1.25
x .083
Bolt, Hex Head 3/8-16 x 3-1/4”
Bolt, Carriage 7/16-14 x 1-1/4”
Bolt, Deck Adjust
Lever Assy, Deck Level (Incl.80)
Cutter Deck 61 V w/Decals
Cutter Deck 61 V w/Decals (LE)
Cutter Deck 72 V w/Decals
Spring, Discharge Chute
Discharge Chute 61V
Discharge Chute 72V
Bolt, Hex Head 5/16-18 x 4-1/2”
Belt Cover Assy. (LE model)
Cap, Spindle (LE model)

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X
X
X

X
X
X

X
X

X
X
X

47

R

CUTTER DECK CONTROLS

STT2006CDC

21

19

37

42

4

6

14

10 42

5

2

3

35

23

41

3832

34

30

7

27

33

40

41

28

28

24

26

41

40

CUTTER DECK

13

40

39

31

41

40

39

43

9

8

45

20

18

36

16

44

17

41

40

26

11

29

22

40

41

15

22

41

1

40

24

12

26

29

41

25

Section 8

48

R

Section 8

CUTTER DECK CONTROLS

Ref.
No.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

Part No. Description

461929
481764
481765
481766
04020-27
04020-28
04021-09
482429
43391
43487
43526
43527
45904
45905
04021-05
422381
423509
422346
46975
48100-14
481428
481598
424504
04020-09
04019 -03
04040-09
04041-14
48114-04
04061-07
04030-07
04004-44
04067-09
04050-08
04021-07
04105-01
423463
04014-03
481547
48540
04001-20
04019-04
04050-10
04001-74
04003-04
04009-02

Lever Assembly, Deck Level
Link, Deck Lift
Rod End, Female - 1/2-20 RH
Rod End, Female - 1/2-20 LH
Nut, Jam 1/2-20 RH
Nut, Jam 1/2-20 LH
Nut, 3/8-16 Elastic Stop
Slide Weldment, Height Adjustment
Spacer, Decklift Pedal
Pin, Decklift
Swivel Joint, LH
Swivel Joint, RH
Bellcrank Weldment, LH Rear
Bellcrank Weldment, RH Rear
Locknut, 3/8-16 Center Lock
Guide, Short
Guide, Long
Lockplate, Decklift
Deck Latch (Includes items 20 & 21)
Bushing, .502” ID.
Grip, Deck Latch
Spring, Helper (61” & 72” Cutter Decks Only)
Foot Pedal, Height Adjustment
Nut, Hex 5/8-11
Nut, Hex Serrated Flange 5/16-18
Flatwasher, 5/8” (.656 x 1.312 x .095”)
Flatwasher, 1” (1.062 x 1.50 x .048”)
Grease Fitting
Cotter Pin, 3/16 x 1”
Lockwasher, 5/8”
Stud, 5/8-11 x 22.0”
Ring Pin, 1/2 x 3.06”
Ring, Retaining 1” External “E”
Nut, Hex Elastic Stop 1/2-13
Capscrew, 5/8-11 x 1-1/2”
Bracket, Cutting Height Adjustment
Screw, Cap 5/16-18 x 3” FHHS
Lanyard, Deck Height Pin
Chain
Bolt, Hex Head 3/8-16 x 1-1/2”
Nut, Hex Serrated Flange 3/8-16
Ring, Retaining 1/2” External “E”
Bolt, Hex Head 1/2-13 x 3”
Bolt, Carriage 5/16-18 x 1”
Bolt, Shoulder 1/2 x 3/4”

49

R

STT 2011 SMC

48

50

26

30

25

12

15

19

9

1

23

24

31

32

33

34

29

33

36

37

40

39

38

41

42

43

51

35

44

45

15

27

22

4

20

28

15

14

13

12

11

10

16

17

20

5

8

7

18

18

4

A

A

6

49

47

46

3

8

SHEET METAL COMPONENTS

Section 8

50

R

Section 8

SHEET METAL COMPONENTS

Ref.
No.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

36
37
38

39

40

41

42
43
44
45

Part No. Description

451481
04001-09
483371
482621
491729
424819
04001-117
04019-05
*
48903
421274
04003-12
423308
04029-01
04019-03
04003-01
48661
43584
04003-04
482622
04021-09
462329
04019-04
04017-27
451480
423489
04021-09
04001-19
04001-125
04021-13
481559
04021-20
481657
482028-01
451450
451957
451825
451451
451452
451453
481025
04021-07
45934
451416
04001-134
04001-167

43581
43583
9277
9278
04001-01
04001-01
423674
481284

Fender Weldment, RH
Bolt, Hex Head, 5/16-18 x 1, Zinc
Spring, Seat Latch
Bearing w/ Race
Seat Plate w/Decal
Guard, Fuel Line
Bolt, Hex Head 7/16-14 x 1-3/4”
Nut, 7/16-14 Serrated Flange
Battery (not avail. through Scag)
Pad, Battery Cover
Cover, Battery
Bolt, Carriage 5/16-18 x 3/4”
Plate, Battery Box
Wing Nut, 1/4-20 x 3/4”
Nut, Hex Serrated Flange 5/16-18
Bolt, Carriage 1/4-20 x 6”
Rubber Pad
Spacer, Caster Wheel
Bolt, Carriage 5/16-18 x 1”
Seal
Locknut, 3/8-16, Elast. Stop
Main Frame w/Decals
Nut, Hex Serrated Flange 3/8-16
Screw, Hex Serrated Flange 3/8-16 x 1”
Fender Weldment, LH
Foot Plate
Nut, Hex Elastic Stop 3/8-16
Bolt, Hex Head 3/8-16 x 1”
Bolt, Hex Head 5/8-11 x 4”
Nut, Hex Elastic Stop 5/8-11
Cap, Grease
Nut, Hex Elastic Stop 1.0-14
Bearing W/Race
Plug, 1/4-28 THD Form
Extention Weldment, Caster 52V (LH)
Extention Weldment, Caster 52V (RH)
Extention Weldment, Caster 61V (LH)
Extention Weldment, Caster 61V (RH)
Extention Weldment, Caster 72VS (LH)
Extention Weldment, Caster 72VS (RH)
Seal, 2.00” OD. x 1.625” Bore
Nut, Hex Elastic Stop 1/2-13
Yoke Weldment, Caster (52V)
Yoke Weldment, Caster (61V & 72A/VS)
Bolt, Hex Head 1/2-13 x 7-1/2” (52V)
Bolt, Hex Head 1/2-13 x 9-1/2” (61V &
72A/VS)
Sleeve, Caster Wheel (52V)
Sleeve, Caster Wheel (61V, 72A/VS)
Wheel Assy, 52V (Incl. items 20, 54, 55)
Wheel Assy, 61V, 72A (Incl. 20, 54, 55)
Bolt, Hex Head 1/4-20 x 3/4”
Bolt, Hex Head 1/4-20 x 3/4”
Mounting Bracket, STT Cup Holder
Bumper, Rubber

Ref.
No.

46
47
48
49
50

51

Part No. Description

04050-01
484341
9240
491731
462045

462046

461908

461909

461910

462154

48114-10

Retaining Ring, .625” Ext. “E”
Grip, Seat Latch
Cup Holder Assembly
Lever Assembly, Seat Release
Caster Wheel Assembly (Incl. 31 thru 43)
52V (LH)
Caster Wheel Assembly (Incl. 31 thru 43)
52V (RH)
Caster Wheel Assembly (Incl. 31 thru 43)
61V (LH)
Caster Wheel Assembly (Incl. 31 thru 43)
61V (RH)
Caster Wheel Assembly (Incl. 31 thru 43)
72VS (LH)
Caster Wheel Assembly (Incl. 31 thru 43)
72VS (RH)
Grease Fitting

51

R

STT ROLL-OVER PROTECTION SYSTEM

2

3

4

4

2

3

4

3

4

1

1

1

7

8

6

9

5

7

5

11

10

11

6

10

9

2

5

5

Section 8

52

R

Section 8

STT ROLL-OVER PROTECTION SYSTEM

Ref.
No.

1
2
3
4
5
6
7
8
9
10
11

Part No. Description

462210
04001-87
04021-19
04040-13
484168
04001-163
04021-19
484166
484170
484169
484167

STT, ROPS
Bolt, Hex Head 1/2-13 x 4”
Nut, Center Lock 1/2-13
Flatwasher, 1/2-.562 x 1.375 x .109
Pin Assembly (incl. #9 & #10)
Bolt, Hex Head 1/2-13 x 3-3/4”
Nut, Center Lock 1/2-13
Stop Bracket, ROPS
Spring, ROPS
Clip, ROPS
Spring Clip, ROPS

53

R

3

4

7

6

5

11

10

9

8

4

3

1

2

2

13

12

12

12

12

STT SUSPENSION SEAT

Section 8

Ref.
No.

1
2
3
4
5

6
7

8
9
10

11

12
13

Part No. Description

9292
04001-178
04040-11
483594
482950
482945
482946
482940
482943
482948
482942
482952
482944
482948
482941

04001-12
483440

Suspension Seat Assembly w/seat belt
Bolt, Hex Head 7/16-20 x 1”
Flatwasher, 7/16-.500 x 1.25 x .083
Retractable Seat Belt
Armrest Only
Armrest Assembly Kit, LH
Armrest Assembly Kit, RH
Back Cushion Kit
Lumbar Kit
Knob Kit
Shock Absorber Kit
Seat Adjustment, Track Set
Weight Adjustment Kit
Knob Kit
Seat Cushion Kit
Seat Drain Kit (Included with Seat Cushion)
Bolt, Hex Head 5/16-18 x 1-3/4"
Wire Harness Adapter

54

R

Section 8

NOTES

55

R

DECK DRIVE COMPONENTS

STT 2011 DDC

B

A

A

B

C

C

Frame

2

1

40

3

47

46

47

43

42

4

41

45

59

53

8

54

72

5

6

64

63

62

7

52

55

9

60

61

10

11

56

52

12

15

65

58

52

14

13

12

20

17

45

18

66

19

67

45

56

21

57

58

52

22

18

23

24

49

50

69

25

26

27

28

29

30

36

35

34

33

32

31

68

48

51

38

71

73

70

39

53

45

46

52

44

45

45

45

37

73

16

45

52

74

75

76

77

Section 8

56

R

Section 8

DECK DRIVE COMPONENTS

Ref.
No.

1
2
3
4
5
6

7
8
9
10
11
12
13

14
15

16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

39
40
41
42
43
44

45

Part No. Description

423925
481531
481309
482845
48030-09
461661
461662
482876
483088
48181
481536
482949
481884
483165
483166
483214
483082
483083

43631
04063-14
48224
481284
482745
482667
461609
43632
461697
481035
43297
481025
481022
43312
43296
48114-04
48677
43644
481022
481024
43534
461608
482424
482438

04012-08
04011-11
04041-07
04069-01
43507
462092

452021

462091

04019-04

Belt Guard, Rear
Hinge, Belt Guard
Latch, Hood
Rod Assembly, Clutch Anti-Rotation
Clamp, Cable
Clutch, Ogura GT-3.5
Clutch, Ogura GT-5 (35BVAC)
Belt, Deck Drive
Spring, Transmission Idler
Pulley, Idler 5” Dia.
Tapered Hub, 1” Bore
Pulley, 6.70” Tapered Bore
Tapered Hub, 17mm Bore
Belt, Pump Drive STT
Belt, Pump Drive (29DFI, 35BVAC)
Pulley, Idler 4” Dia.
Pulley, 4.55” Dia.-1.125” Bore
Pulley, 5.15” Dia.-1.125” Bore (29DFI,
35BVAC)
Spacer, Idler Bearing
Key, 5.0 x 5.0 x 25mm
Ball Bearing
Bumper, Rubber
Pulley, 6.35” O.D. (29DFI, 35BVAC)
Spring, PTO
Idler Arm Weldment, PTO Drive
Pivot, Idler PTO
Spindle Assembly, Deck Drive
Nut, 1.06”-18 Thread
Spindle Bushing, Bottom
Seal, 2.0” OD x 1.625” Bore
Roller Bearing Tapered
Spacer, Outside
Spacer, Inside
Grease Fitting, 1/4-28
Relief Fitting
Spindle Housing
Roller Bearing Tapered
Seal, 2.0” OD x 1.5” Bore
Shaft, Deck Drive
Idler Arm Weldment, Pump Drive
Driveshaft (Air-Cooled Engine)
Driveshaft (Liquid-Cooled Engine &
35BVAC)
Set Screw, 3/8-16 x 3/4” Torx Socket
Screw, #10-32 x .56”
Flatwasher, 3/8 (.391 x .938 x .105”)
Pin, Rue Cotter 3/8” Dia.
Stud, Anti Rotation
Pump Mounting Plate Weldment (Air­Cooled Kohler)
Pump Mounting Plate Weldment (Liquid­Cooled Kawasaki)
Pump Mounting Plate Weldment (Air­Cooled Briggs & Stratton)
Nut, Serrated Flange 3/8-16

Ref.
No.

46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77

Part No. Description

04019-02
04003-07
04021-22
04001-176
04063-06
04001-171
04043-04
04001-135
04001-136
04001-170
04021-05
04001-136
04021-09
04001-45
04001-109
04030-02
04001-101
04030-05
04041-28
04001-172
04001-21
04019-03
04021-09
04001-19
04021-05
04001-21
04063-02
04063-20
424138
43063
04001-19
425214

Nut, Serrated Flange 1/4-20
Bolt, Carriage 1/4-20 x 1/2”
Nut, Elastic Stop 5/16-18 Grade 8
Bolt, Hex Head 5/16-18 x 1-3/4” Grade 8
Key, 1/4 x 1/4 x 1-1/2”
Bolt, Hex Head 3/8-16 x 4-1/2” Grd 8 Black
Washer, 3/8” Hardened
Bolt, Hex Head 3/8-16 x 1-3/4” Grd 8 Black
Bolt, Hex Head 3/8-16 x 1-1/2” Grd 8 Black
Bolt, Hex Head 3/8-16 x 2-1/2” Grd.8
Nut, Center Lock 3/8-16
Bolt, Hex Head 3/8-16 x 1-1/2” Grd 8 Black
Nut, Elastic Stop 3/8-16
Bolt, Hex Head 3/8-16 x 2”
Bolt, Hex Head 1/4-20 x 1-3/8”
Lockwasher, 1/4” Spring
Bolt, Hex Head 7/16-20 x 2-1/2” UNF
Lockwasher, 7/16” Spring
Flatwasher, 7/16 (.469 x 1.75 x .25”)
Bolt, Hex Head 1/4-20 x 1” Grade 8
Bolt, Hex Head 3/8-16 x 1-3/4”
Nut, Serrated Flange 5/16-18
Nut, Elastic Stop 3/8-16
Bolt, Hex Head 3/8-16 x 1”
Nut, Center Lock 3/8-16
Bolt, Hex Head 3/8-16 x 1-3/4”
Key, 1/4 x 1/4 x 2-1/4”
Key, 1/4 x 1/4 x 1”
Bracket
Spacer
Bolt, Hex Head 3/8-16 x 1”
Bracket, Idler Stop

57

R

Section 8

STT 2005 EAPKH

1

3

7

8

2

5

9

10

9

14

FRAME

REF. PUMP

MTG. WELDMENT

11

6

15

16

10

12

4

12
10

13

ENGINE AND ATTACHING PARTS - KOHLER

58

R

Section 8

ENGINE AND ATTACHING PARTS - KOHLER

Ref.
No.

Part No. Description

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

422593
04017-05
**
482510
04110-01
424691
483537
** 484234
04001-19
04030-04
04001-21
04021-09
04001-32
451459
04003-12
04019-03

Muffler Guard
Screw, Hex Serrated Flange 1/4-20 x 3/4”
Muffler, Part Of Engine (Available only through Kohler)
Oil Drain Extension
U-Nut, 1/4-20
Rear Cover
Hour Meter
Engine, Kohler 27 CH (Available only through Kohler)
Bolt, Hex Head 3/8-16 x 1”
Lockwasher, 3/8” Spring
Bolt, Hex Head 3/8-16 x 1-3/4”
Nut, Hex Elastic Stop 3/8-16
Bolt, Hex Head 3/8-16 x 1-1/4”
Plate, Engine Mounting
Bolt, Carriage 5/16-18 x 3/4”
Nut, Hex Serrated Flange 5/16-18

** Available through the individual engine manufacturer.

59

R

Section 8

STT 2009 EAPKA

8

FRAME

REF. PUMP

MTG. WELDMENT

11

1

3

2

10

12

10

12

10

12

13

14

7

4

A

9

6

10

13

5

A

17

15

16

11

16

23

18

19

20

21

22

24

25

26

12

27

ENGINE & ATTACHING PARTS - 27HP, 29DFI KAWASAKI & 35BVAC

60

R

Section 8

ENGINE & ATTACHING PARTS - 27HP, 29DFI KAWASAKI & 35BVAC

Ref.
No.

1

2
3

4
5
6
7

8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

Part No. Description

451378
422593
04017-05
482699
483819
483857
451421
04110-01
483537
482351
483017
** 484235
** 484048
** 484238
04002-18
04030-04
04001-21
04021-09
04001-32
451454
04003-12
04019-03
424691
04040-05
424634
483507
424633
04009-07
*462157
*43740
*483471
*04041-11
*04041-07

Muffler Guard (Kawasaki
Muffler Guard (Briggs & Stratton)
Screw, Hex Serrated Flange 1/4-20 x 3/4”
Muffler (Kawasaki)
Muffler (Briggs & Stratton)
Spark Arrestor Assembly, Briggs & Stratton (not shown, 35BVAC only)
Screen Weldment, Radiator (Kawasaki Only)
U-Nut, 1/4-20
Hour Meter
Oil Drain, 2.6” (Kawasaki Only)
Oil Drain, (BV Only)
Engine, Kawasaki 27KA (Available only through Kawasaki)
Engine, Kawasaki 29KA-DFI (Available only through Kawasaki)
Engine, Briggs & Stratton 35HP V-Twin Air-Cooled (Avail. only through B & S)
Bolt, M10-1.50 x 25mm Grade 8.8
Lockwasher, 3/8” Spring
Bolt, Hex Head 3/8-16 x 1-3/4”
Nut, Hex Elastic Stop 3/8-16
Bolt, Hex Head 3/8-16 x 1-1/4”
Plate, Engine Mounting
Bolt, Carriage 5/16-18 x 3/4”
Nut, Hex Serrated Flange 5/16-18
Rear Cover
Flatwasher, 3/8 - .406 x .812 x .065
Lock, Hood Latch
Spring, Hood Latch
Latch, Hood
Bolt, Shoulder 5/16-18 x 1/2”
Hood Assembly w/Decals (Incl. 16, 18, 19, 20, 21, 22)
Spacer, Hood
Disc, Anti-Friction
Flatwasher, 3/8 - .406 x 1.50 x 7 Gauge
Flatwasher, 3/8 - .391 x .938 x .105

* Liquid Cooled Models Only.
** Available through the individual engine manufacturer.

61

R

BRAKE AND STEERING COMPONENTS

STT2006B&SC REV 1

A

1

10

11

33

17

9

19

23

41

11
21

34

36

57

73

48

47

46

5

23

53

42

43 44 45

15

56

70

69

71

62

15

65

60

64

67

60

52

41

34

23

51

50

34

35

TO RH PUMP

TO LH PUMP

37

36

27

28

35

33

78

34

31

30

29

8

9

32

13

B

9

B

25

18

72

49

55

54

75

26

58

5

68

66

37

36

61

59

74

7

20

13

14

22

14

39

16

24

38

63

24

38

12

79

22

21

A

40

38

80

77

45

2

76

4

3

6

6

81

5

82

Section 8

62

R

Section 8

BRAKE AND STEERING COMPONENTS

Ref.
No.

1
2

3
4
5
6
7

8
9
10
11
12
13
14
15
16
17
18

19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

36
37
38
39
40
41
42
43
44
45

Part No. Description

482340
461914
461923
04001-09
04030-03
483250
483238
451483
451484
04001-17
04021-10
04001-45
04021-09
423488
48224
43607
04069-01
04001-13
04021-13
461601
461602
04003-04
43600
04003-12
04019-03
04050-01
43602
45918
04003-02
04040-14
04021-08
43477
481389
04060-01
04061-06
482586
04020-25
43629
43624
04020-26
482585
04021-10
482794
04001-187
48114-04
461082
481548
04001-22
04019-06

Grip, Handle Bar
Handle Bar, LH (Includes item 1)
Handle Bar, RH (Includes item 1)
Bolt, Hex Head 5/16-18 x 1”
Lockwasher, 5/16”
Rubber Spacer
Bar, Control Lever
Control Lever Weldment, LH
Control Lever Weldment, RH
Bolt, Hex Head 5/16-18 x 2”
Nut, Hex Elastic Stop 5/16-18
Bolt, Hex Head 3/8-16 x 2”
Nut, Hex Elastic Stop
Mount, Control Linkage
Ball Bearings, Neutral Return
Spacer
Pin, Rue Cotter 3/8” Dia.
Bolt, Hex Head, 5/16-18 x 2.75” Zinc
Nut, Hex Elastic Stop 5/8-11
Bracket, Control Lever LH
Bracket, Control Lever RH
Bolt, Carriage 5/16-18 x 1”
Spacer, Bearing
Bolt, Carriage 5/16-18 x 3/4”
Nut, Hex Serrated Flange 5/16-18
Ring, Retaining 5/8” External “E”
Spacer
Bracket, Neutral Return
Bolt, Carriage 1/4-20 x 3/4”
Flatwasher, 1/4” (.312 x .750 x .065”)
Nut, Hex Elastic Stop 1/4-20
Pin, Retaining Spring
Spring
Roll Pin, Spring 5/32” x 3/4”
Pin, Cotter 9/16” x 1-1/2”
Rod End, Male 3/8”-24 RH Thread
Nut, 3/8”-24 RH Thread
Tube, Control Link Air-Cooled Engine
Tube, Control Link Liquid-Cooled Engine
Nut, Hex 3/8”-24 LH Thread
Rod End, Male 3/8”-24 LH Thread
Locknut, 5/16-18, Elastic Stop
Gas Damper
Bolt, Hex Head 1/2-13 x 2-1/2” Grade 8
Grease Fitting
Lever, Parking Brake (Includes item 43)
Grip, Parking Brake
Bolt, Hex Head 3/8-16 x 2-3/4”
Nut, Hex Serrated Flange 1/2-13

Ref.
No.

46
47
48
49
50
51
52
53
54
55

56

57
58
59
60
61
62
63
64
65
66
67
68
69

70
71
72
73
74
75
76
77
78
79
80
81
82

Part No. Description

48343-04
04064-02
04061-02
04004-34
48544
48796
04001-08
04001-147
481637
04010-12

462100
462101
45953
48807
04001-163
04021-19
04001-52
482639
04001-12
483644
04064-16
43063
461438
04063-25
481552
481659
481660
481850
481851
481852
04028-02
48680
422373
04001-20
423279
423491
04017-16
04003-36
04001-19
481638
04001-168
04003-38
483269

Clevis, Traction Control
Pin, Clevis 3/8-16 x 1-1/16”
Pin, Cotter 3/32 x .75”
Rod, Parking Brake
Rod End, LH Thread
Bushing, Self Align
Bolt, Hex Head 5/16-18 x 3/4”
Bolt, Hex Hd 3/8-24 x 5-1/4”, 23/4” Thrd
Switch
Screw, Hex-Slotted Washer Head #10 32
x 3/4”
Brake Linkage, LH
Brake Linkage, RH
Bellcrank, Brake Actuator
Spring
Bolt, Hex Head 1/2-13 x 3-3/4”
Locknut, Hex 1/2-13 Center Lock
Bolt, Hex Head 1/2-13 x 2-1/2”
Wheel Motor
Bolt, Hex Head, 5/16-18 x 1.75”, Zinc
Brake Band Assembly
Pin, Clevis 3/8” Dia. x 1.93”
Spacer
Wheel Hub/Brake Drum Assembly
Key, Woodruff 5/16 x 1”
Wheel Assembly 23 x 10.5-12 (52” Only)
Rim W/Valve Stem (52” Only)
Tire, 23 x 10.5-12 (52” Only)
Wheel Assembly 24 x 12-12 Turf Master
Rim W/Valve Stem
Tire, 24 x 12-12 Turf Master
Lug Nut, 1/2-20
Nut, Hex Castle
Threaded Plate
Bolt, Hex Head 3/8-16 x 1-1/2”
Plate Weldment, Motor Backing
Actuator Switch
Bolt, Hex Serrated Flange 5/16-18 x 3/4”
Bolt, Carriage 3/8-16 x 4-3/4”
Bolt, Hex Head 3/8-16 x 1”
Switch
Bolt, Hex Head 3/8-16 x 1-1/4” Grade 8
Bolt, Carriage 5/16-18 x 1-1/2”
Knob

.

63

R

STT HYDRAULIC SYSTEM

D

D

D

E

F

C

I

H

G

G

F

E

A

A

B

C

DUMP
VALVE

B

2011 STT HS.eps

I

H

39

23
24
26
40

34
25
35

21
31

33

9

30

30

11
12
13

7

4

4

3

44 45 17

46

16

14

15

32

5

4

4

5

42

34
25
35

18

8
20
19

6

22
41

27
28

29
30

38

Z

2

2

36
10
37

7

7

22

5

4

4

43 (2)

43 (2)

7

5

1

Section 8

64

R

Section 8

STT HYDRAULIC SYSTEM

Ref.
No.

1
2
3
4
5
6
7

8
9

10

11

12
13

14
15
16

17
18
19
20
21
22
23
24
25
26
27

28
29
30
31
32
33
34

35
36
37
38
39

40

Part No. Description

04110-01
48136-13
04001-03
48811
48136-07
481301-03
482266-01

48471-02
482606

425437
425490

425438
425491

04043-04

04021-09
482696
483100
04001-32
04021-09
482695
483101
481793
04001-09
04019-03
48758
482483
04021-08
481164
481507
48603-02
461451
482572
482571
48136-13
48811
04010-10
48571-02
422694
48136-05
48350-02
48350-05
48938-02
482505
04001-08
04003-02
482574
482573
423513

U-Nut 1/4-20
Hose Clamp, 0.69” Dia.
Bolt, Hex Head 1/4-20 x 2.0”
Hose, 3/8” ID Pushlock - (order by inch)
Clamp, Hose 1/2”
Elbow, 90 Degree - 1/4” NPT x 3/8” Hose
Elbow, 90 Degree - 9/16” O-Ring x 3/8”
Hose
Oil Filter Base
Hose Assembly, 1/2” ID (Tank to Filter
Base)
Mounting Bracket - LH, Oil Cooler
Mounting Bracket - LH, Oil Cooler
(35BVAC)
Mounting Bracket - RH, Oil Cooler
Mounting Bracket - RH, Oil Cooler
(35BVAC)
Flatwasher, 3/8” (.391 x .938 x .105”)
Grade 8
Nut, Hex Elastic Stop 3/8-16
Pump, Right Hand
Pump w/Fan, Right Hand (29DFI,35BVAC)
Bolt, Hex Head, 3/8-16 x 1-1/4”
Nut, Hex, Elastic Stop 3/8-16
Pump, Left Hand
Pump w/Fan, Left Hand (29DFI, 35BVAC)
Block, Pump Control
Bolt, Hex Head 5/16-18 x 1.0” Zinc
Nut, Serrated Flange 5/16-18
Oil Filter
Tee, 3/4” O-Ring x JIC x 1/2” Hose
Nut, Hex Elastic Stop 1/4-20
Cap, Hydraulic Tank
Insert, Filler Neck
O-Ring
Oil Reservoir Assembly (incl. 24, 27, 39)
Elbow, 90 Degree .38” Hose
Bushing, .56” Dia. Viton
Hose Clamp, 0.69” Dia.
Hose, 3/8” ID, Pushlock (order by inch)
Screw, Phillips Head, 1/4-20
Cap
Clamp Plate, Pump Control
Clamp, Hose
Elbow, 90 Degree, 1/2” x 1/2”
Elbow, 90 Degree, 5/8” x 1/2” (35BV Only)
Bushing, 7/8”-14 JIC x 3/4”-16 O-Ring
Cooler, Oil
Bolt, Hex Head 5/16-18 x 3/4”
Bolt, Carraige 1/4-20 x 3/4”
Elbow, 90 Degree
Bushing, .78” Dia. Viton
Strap, Hydraulic Tank

Ref.
No.

41
42

43
44
45
46

Part No. Description

423485
481611

48572-04
04001-59
04030-02
04060-09

Support Bracket, Hydraulic Tank
Hose Assembly, Pump (27CH, 27KA,
29DFI)
Union, 3/4”-16 JIC x 3/4”-16 O-Ring
Bolt, Hex Head, 1/4-20 x 1-1/4”
Lockwasher, 1/4” Spring
Roll Pin, Spring 3/16 x 3/4”

** Available through the individual engine manufacturer.

65

R

Section 8

2011 STT FS - EPA Phase 2.eps

Z

Z

To
Injector

Fuel

Return

To Fuel

Pump

Fuel

Tank

To
Carburetor

Kohler
Briggs & Stratton - 35BVAC

Kawasaki - 27KA

Kawasaki - 29DFI

1

2

3

4

5

6

7

8

9

10

10

10

10

11

11

12

*

*

*

*

*

*

*

*

*

11

11

10

10

10

10

10

10

10

11

13

13

14

15

16

*

8

STT FUEL SYSTEM - EPA PHASE 2

(models produced prior to 1/1/2011)

66

R

Section 8

STT FUEL SYSTEM - EPA PHASE 2

(models produced prior to 1/1/2011)

Ref.
No.

1 484251 Fuel Gauge Assembly
2 484242 Seal, Fuel Gauge
3 483792 Fuel Cap
4 04003-02 Bolt, Carriage 1/4-20 x 3/4”
5 462301 Fuel Tank Assembly - STT (incl. # 1, 2, 8, 9)
462302 Fuel Tank Assembly - STT-29DFI (incl. # 1, 2, 8, 9, 17, 18)
6 425517 Support Bracket, Fuel Tank
7 04019-02 Nut, 1/4-20 Serrated Flange
8 482571 Bushing, .56 Dia. Viton
9 483749 Hose Fitting
10 48059-01 Clamp, Fuel Hose 1/4” I.D. (27CH, 35BVAC, 29DFI Fuel Return Hose)
48059-04 Clamp, Fuel Hose 5/16” I.D. (27KA, 29DFI)
11 483617 Fuel Hose, 1/4” I.D. Non-Perm (27CH, 35BVAC) - Order by Inch
483620 Fuel Hose, 5/16” I.D. Non-Perm (27KA, 29DFI) - Order by Inch
12 481308 Valve, Fuel Shut-Off (27KA, 29DFI)
481753 Valve, Fuel Shut-Off (27CH, 35BVAC)
13 48136-05 Clamp, .87” Max. Dia
14 483622 Fuel Hose, 1/2” I.D. Non-Perm - Order by Inch
15 483617 Fuel Hose, 1/4” I.D. Non-Perm (29DFI Fuel Return) - Order by Inch
16 482703 Return Fitting, Straight

Part No. Description

* = Available through engine manufacturer only.

67

R

2011 STT FS - EPA Phase 3.eps

Z

Z

1

2

3

4

5

6

7

8

9

10

10

10

10

11

11

12

To
Injector

Fuel

Return

Fuel

Ta nk

Kawasaki - 29DFI

*

*

11

10

10

10

10

10

11

13

13

14

15

16

*

8

Tank

Purge

A

B

To Engine

Purge Port

B

C

A

C

17

18

19

20

21

21

22

23

24

25

26

27

28

28

32

29

30

31

To Fuel

Pump

To
Carburetor

Kohler
Briggs & Stratton - 35BVAC

Kawasaki - 27KA

*

*

*

*

*

*

*

11

10

10

18

18

19

Section 8

STT FUEL SYSTEM - EPA PHASE 3

(models produced after 1/1/2011)

68

R

Section 8

STT FUEL SYSTEM - EPA PHASE 3

(models produced after 1/1/2011)

Ref.
No.

1 484251 Fuel Gauge Assembly
2 484242 Seal, Fuel Gauge
3 484286 Fuel Cap, Tethered
4 04003-02 Bolt, Carriage 1/4-20 x 3/4”
5 462303 Fuel Tank Assembly - STT- (incl. # 1, 2, 8, 9, 30, 31)
462304 Fuel Tank Assembly - STT-DFI / EFI (incl. # 1, 2, 8, 9, 16, 30, 31)
6 425517 Support Bracket, Fuel Tank
7 04019-02 Nut, 1/4-20 Serrated Flange
8 482571 Bushing, .56 Dia. Viton
9 483749 Hose Fitting
10 48059-04 Clamp, Fuel Hose 5/16” I.D. (29DFI)
11 483620 Fuel Hose, 5/16” I.D. Non-Perm (29DFI) - Order by Inch
12 481308 Valve, Fuel Shut-Off (29DFI)
13 48136-05 Clamp, .87” Max. Dia
14 483622 Fuel Hose, 1/2” I.D. Non-Perm - Order by Inch
15 483617 Fuel Hose, 1/4” I.D. Non-Perm (29DFI Fuel Return) - Order by Inch
16 482703 Return Fitting, Straight
17 484279-02 Tube, Fuel Tank Insert - 6”
18 48059-05 Clamp, Vapor Recovery Hose 3/16”
19 48059-02 Clamp, Fuel Hose 7/32 ID
20 484342 Carbon Canister
21 04003-02 Bolt, Carriage 1/4-20 x 3/4”
22 48030-22 Clamp
23 04040-03 Flatwasher, 1/4-.281 x .562 x .049
24 04021-08 Nut, 1/4-20 Elastic Stop
25 04019-02 Nut, 1/4-20 Serrated Flange
26 425496 Bracket, RH Canister Mounting
27 48136-17 Clamp
28 484345 Hose, 3/16 (order by inch)
29 484343-01 Mender, 1/4 x 3/16 w/.02 Hole
30 484284 Valve, Rollover
31 484284 Grommet, Viton
32 484347 Hose, 1/4” Vapor Recovery (order by inch)

Part No. Description

* = Available through engine manufacturer only.

69

R

2011 STT FS - CARB TEIR 3 Rev2.eps

Z

Z

1

2

3

4

5

6

7

8

9

10

10

10

10

11

11

12

To
Injector

Fuel

Return

Fuel
Ta nk

Kawasaki - 29DFI

*

*

11

10

10

10

10

10

11

13

13

14

15

16

*

8

Tank

Purge

A

B

To Engine

Purge Port

B

C

A

C

17

18

19

20

21

21

22

23

24

25

26

27

28

28

32

29

30

31

To Fuel

Pump

To
Carburetor

Kohler
Briggs & Stratton - 35BVAC

Kawasaki - 27KA

*

*

*

*

*

*

*

11

10

10

18

18

19

Section 8

STT-LE FUEL SYSTEM - C.A.R.B. TIER 3

(LE models only - Produced after 1/1/2010)

70

R

Section 8

STT-LE FUEL SYSTEM - C.A.R.B. TIER 3

(LE models only - Produced after 1/1/2010)

Ref.
No.

1 484251 Fuel Gauge Assembly
2 484242 Seal, Fuel Gauge
3 484297 Fuel Cap, Tethered (C.A.R.B.)
4 04003-02 Bolt, Carriage 1/4-20 x 3/4”
5 462303 Fuel Tank Assembly - STT- (incl. # 1, 2, 8, 9, 30, 31)
462304 Fuel Tank Assembly - STT-DFI / EFI (incl. # 1, 2, 8, 9, 16, 30, 31)
6 425517 Support Bracket, Fuel Tank
7 04019-02 Nut, 1/4-20 Serrated Flange
8 482571 Bushing, .56 Dia. Viton
9 483749 Hose Fitting
10 48059-04 Clamp, Fuel Hose 5/16” I.D. (29DFI)
11 483620 Fuel Hose, 5/16” I.D. Non-Perm (29DFI) - Order by Inch
12 481308 Valve, Fuel Shut-Off (29DFI)
13 48136-05 Clamp, .87” Max. Dia
14 483622 Fuel Hose, 1/2” I.D. Non-Perm - Order by Inch
15 483617 Fuel Hose, 1/4” I.D. Non-Perm (29DFI Fuel Return) - Order by Inch
16 482703 Return Fitting, Straight
17 484279-02 Tube, Fuel Tank Insert - 6”
18 48059-05 Clamp, Vapor Recovery Hose 3/16”
19 48059-02 Clamp, Fuel Hose 7/32 ID
20 484342 Carbon Canister
21 04003-02 Bolt, Carriage 1/4-20 x 3/4”
22 48030-22 Clamp
23 04040-03 Flatwasher, 1/4-.281 x .562 x .049
24 04021-08 Nut, 1/4-20 Elastic Stop
25 04019-02 Nut, 1/4-20 Serrated Flange
26 425496 Bracket, RH Canister Mounting
27 48136-17 Clamp
28 484345 Hose, 3/16 (order by inch)
29 484343-01 Mender, 1/4 x 3/16 w/.02 Hole
30 484284 Valve, Rollover
31 484284 Grommet, Viton
32 484347 Hose, 1/4” Vapor Recovery (order by inch)

Part No. Description

* = Available through engine manufacturer only.

71

R

Section 8

OR

OR

PORT "A"
SIDE

PORT "B"
SIDE

Overhaul Seal Kit

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

17

18

19

20

20

21

21

22

23

24

25

26

27

28

29

30

BDP-16A HYDRAULIC PUMP ASSEMBLY

72

R

Section 8

BDP-16A HYDRAULIC PUMP ASSEMBLY

Ref.
No.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

Part No. Description

HG70740
HG51455
HG70735
HG51462
HG51436
HG2000015
HG2000014
HG2000025
HG2000024
HG2000032
HG2000023
HG2000038
HG51092
HG70581
HG70738
HG70739
HG50641
HG51437
HG9005110-7500
HG70743
HG70742
HG9005200-7500
HG70736
HG2513030
HG9004100-1430
HG50406
HG50173
HG2510071
HG51457
HG70402

Overhaul Seal Kit
Valve Plate
Cylinder Block Kit - 16cc
Thrust Ball Bearing Assembly
Variable Swashplate
Slot Guide
Trunnion Arm
Block Spring
Block Thrust Washer
Shaft Ball Bearing
Spacer
Retaining Ring
Seal
Kit, Pump Shaft
Housing Kit
Trunnion Seal Kit
Pin
O-Ring
Straight Thread Plug
Shock Valve Kit (.031 Orifice)
Shock Valve Kit (.024 Orifice)
Straight Thread Plug
End Cap Kit
Bypass Valve Kit
O-Ring
Gerotor Assembly (.19 cu.in./rev.)
Socket Head Cap Screw (M8 x 1.25-25mm)
Charge Pump Kit (.19 STD. Splined)
Hex Screw, Flanged Head (M10 x 1.50-65mm)
Charge Relief Kit

73

R

BDP-16A HYDRAULIC PUMP ASSEMBLY with COOLING FAN

OR

OR

PORT "A"
SIDE

PORT "B"
SIDE

Overhaul Seal Kit

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

17

18

19

20

20

21

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

27

(29DFI & 35BVAC))

Section 8

74

R

Section 8

BDP-16A HYDRAULIC PUMP ASSEMBLY with COOLING FAN

(29DFI & 35BVAC))

Ref.
No.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

Part No. Description

HG70740
HG51455
HG70735
HG51462
HG51436
HG2000015
HG2000014
HG2000025
HG2000024
HG2000032
HG2000023
HG2000038
HG51092
HG70578
HG70738
HG70739
HG50641
HG51437
HG9005110-7500
HG70743
HG70742
HG9005200-7500
HG70736
HG2513030
HG9004100-1430
HG50406
HG50173
HG70924
HG51457
HG70402
HG71287
HG51348
HG52016
HG52014
HG52256
HG44809
HG52059

Overhaul Seal Kit
Valve Plate
Cylinder Block Kit - 16cc
Thrust Ball Bearing Assembly
Variable Swashplate
Slot Guide
Trunnion Arm
Block Spring
Block Thrust Washer
Shaft Ball Bearing
Spacer
Retaining Ring
Seal
Kit, Pump Shaft (keyed thru taper)
Housing Kit
Trunnion Seal Kit
Pin
O-Ring
Straight Thread Plug
Shock Valve Kit (.031 Orifice)
Shock Valve Kit (.024 Orifice)
Straight Thread Plug
End Cap Kit
Bypass Valve Kit
O-Ring
Gerotor Assembly (.19 cu.in./rev.)
Socket Head Cap Screw (M8 x 1.25-25mm)
Charge Pump Kit (.19 STD. Splined)
Hex Screw, Flanged Head (M10 x 1.50-65mm)
Charge Relief Kit
Fan Kit (incl. items 32, 34, 35, 36)
Hub
Bracket, Shroud
Fan
Washer
Nut
Shroud

75

R

ELECTRICAL SYSTEM (KOHLER & Briggs & Stratton)

SCAG

POW

ER EQUIPME

NT

21

1

3

4

5

6

12

13

17

STT 2008 ESKH

10

10

11

17

18

15

14

19

20

22

23

24

25

1

28

27

14

15

9
10

11

8

B

B

7

15

14

16

A

26

18

A

C

C

29

2

20

20

2

31

32

30

Section 8

76

R

Section 8

ELECTRICAL SYSTEM (KOHLER & Briggs & Stratton)

Ref.
No.

1

2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17

18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

Part No. Description

483623
484078
482849
48298
483366
462069
48017-04
48017-03
461916
48798
483957
483013
04031-01
04020-01
481755
451879
04030-02
04001-01
04110-01
481544
481662
04010-01
481638
04001-44
48029-22
04020-02
48029-11
48030-09
48136-05
483029
04002-12
04031-03
483642
482588
483629
483571

Wire Harness, STT Air-Cooled
Wire Harness Adapter Kohler (not shown)
Wire Harness Adapter Briggs & Stratton (not shown)
Fuse, 20 AMP
Key, Ignition
Key Assembly w/Fob
Nut, Hex 5/8-32
Lockwasher, 5/8” Internal
Instrument Panel, Top w/Decals
Key Switch
Switch, PTO
Relay
Lockwasher, #10 External Tooth
Nut, Hex #10-32
Ammeter
Base, Instrument Panel
Lockwasher, 1/4”
Bolt, Hex Head 1/4-20 x 3/4”
U-Nut, 1/4-20
Throttle And Choke Controls (Kohler)
Throttle And Choke Controls (35BVAC Briggs & Stratton)
Screw, Phillips Washer Head #10-32 x 1/2”
Switch, Interlock-Seat
Bolt, Hex Head 1/4-20 x 1/2”
Cable, Battery - Red
Nut, Hex 1/4-20
Cable, Battery - Black
Clamp, Cable 1/2” ID.
Clamp, Cable 3/4” ID.
Electronic Module
Bolt, Hex Head M8-1.25 x 20mm
Lockwasher, 5/16” External Tooth
Double Fuse Assembly, Sealed (Incl. items 2, 42, 43, 44)
Clip, Wire
Fuse Holder
Cover, Sealed Double

** Available through the individual engine manufacturer.

77

R

ELECTRICAL SYSTEM - 27HP KAWASAKI

21

28

27

1

3

4

5

6

13

17

STT2008 ESKA

10

10

11

17

18

15

14

19

20

22

23

24

25

26

28

29

30

14

15

9
10

11

8

B

B

7

15

14

16

A

31

18

A

C

C

12

32

33

2

20

20

2

34

35

36

SCAG

POW

ER EQUIPMENT

Section 8

78

R

Section 8

ELECTRICAL SYSTEM - 27HP KAWASAKI

Ref.
No.

1
2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

Part No. Description

481755
48298
483366
462069
48017-04
48017-03
461916
48798
483957
483013
04031-01
04020-01
481183
451879
04030-02
04001-01
04110-01
481662
04010-01
481638
04001-44
48029-06
04020-02
48029-11
48030-09
48136-05
48030-11
481670
483625
04031-03
04002-12
483029
481945-01
483642
483629
483571
482588

Ammeter
Fuse, 20 AMP
Key, Ignition
Key Assembly w/Fob
Nut, Hex 5/8-32
Lockwasher, 5/8” Internal
Instrument Panel, Top w/Decals
Key Switch
Switch, PTO
Relay
Lockwasher, #10 External Tooth
Nut, Hex #10-32
Water Temp. Gauge
Base, Instrument Panel
Lockwasher, 1/4”
Bolt, Hex Head 1/4-20 x 3/4”
U-Nut, 1/4-20
Throttle And Choke Controls
Screw, Phillips Washer Head #10-32 x 1/2”
Switch, Interlock-Seat
Bolt, Hex Head 1/4-20 x 1/2”
Cable, Battery - Red
Nut, Hex 1/4-20
Cable, Battery - Black
Clamp, Cable 1/2” ID.
Clamp, Cable 3/4” ID.
Clamp, Cable
Sending Unit, Water Temp.
Wire Harness, STT Kawasaki Liquid-Cooled
Lockwasher, 5/16” External Tooth
Bolt, Hex Head M8-1.25 x 20mm
Electronic Module
Heatshield, Flexible
Double Fuse Assembly, Sealed (Incl. items 2, 42, 43, 44)
Fuse Holder
Cover, Sealed Double
Clip, Wire

** Available through the individual engine manufacturer.

79

R

SCAG

POW

ER EQUIPME

NT

21

28

27

1

3

4

5

6

13

17

10

11

17

18

15

14

19

20

22

23

24

25

26

28

29

30

14

15

9

10

11

8

B

B

7

15

14

16

A

31

18

A

C

C

12

32

34

33

2

20

20

2

35

36

37

20

2

37

35

38

39

ELECTRICAL SYSTEM - 29DFI KAWASAKI

Section 8

80

R

Section 8

ELECTRICAL SYSTEM - 29DFI KAWASAKI

Ref.
No.

1
2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

Part No. Description

481755
48298
483366
462069
48017-04
48017-03
461916
48798
483957
48788
04031-01
04020-01
481183
451879
04030-02
04001-01
04110-01
481662
04010-01
481638
04001-44
48029-06
04020-02
48029-11
48030-09
48136-05
48030-11
481670
483626
04031-03
04002-12
483029
481945-01
483642
481182
483629
483571
482588
483643
483641

Ammeter
Fuse, 20 AMP
Key, Ignition
Key Assembly w/Fob
Nut, Hex 5/8-32
Lockwasher, 5/8” Internal
Instrument Panel, Top w/Decals
Key Switch
Switch, PTO
Relay
Lockwasher, #10 External Tooth
Nut, Hex #10-32
Water Temp. Gauge (STT - KA Only)
Base, Instrument Panel
Lockwasher, 1/4”
Bolt, Hex Head 1/4-20 x 3/4”
U-Nut, 1/4-20
Throttle Controls
Screw, Phillips Washer Head #10-32 x 1/2”
Switch, Interlock-Seat
Bolt, Hex Head 1/4-20 x 1/2”
Cable, Battery - Red
Nut, Hex 1/4-20
Cable, Battery - Black
Clamp, Cable 1/2” ID.
Clamp, Cable 3/4” ID.
Clamp, Cable
Sending Unit, Water Temp.
Wire Harness, STT Liquid-Cooled Digital Fuel Injection (DFI)
Lockwasher, 5/16” External Tooth
Bolt, Hex Head M8-1.25 x 20mm
Electronic Module
Heatshield, Flexible
Double Fuse Assembly, Sealed (Incl. items 2, 42, 43, 44)
Indicator Light, Check Engine
Fuse Holder
Cover, Sealed Double
Clip, Wire
Cover, Sealed Single
Single Fuse Assembly, Sealed (Incl. items 2, 35, 37, 38)

81

R

REPLACEMENT DECALS AND INFORMATION PLATES

1

2

3

5

8

6

4

9

12

13

7

CHOKE

SLOWFAST

482983

48404

STT 2011 Decals 1

WARNING

INSTALL BELT COVER BEFORE

OPERATING MACHINE

READ OPERATOR'S MANUAL

481568

FORWARD

REVERSE

F

R

11

482508

PULL OUT TO ENGAGE

ON

START

PUSH IN TO DISENGAGE

OFF

MOWER DECK

Hea

vy-

Duty

Commerc

ial

481971

10

PUSH IN TO DISENGAGE

MOWER DECK

PULL OUT TO ENGAGE

22

CHECK

ENGINE LIGHT

482984

SLOW

FAST

23

25

26

__________ __________ __________ __________
__________ __________ __________ __________
__________ __________ __________ __________
__________ __________ __________ __________

24

Section 8

82

R

Section 8

481569

R

16

2011 STT Decals Page2

17

1918

15

481663

481664

20

21

27

14

REPLACEMENT DECALS AND INFORMATION PLATES

Ref.
No.

1
2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
**
**

Part No. Description

483192
483406
483200
483201
481956
483693
483397
483044
481568
481971
48404
483402
482515
482508
482983
482565
484321
484320
482577
483229
481664
481663
481694
483405
482493
482984
483158
483425
484293
483633
461982
01411

Decal, Danger - Spinning Blades
Decal, Warning - Rotating Blades
Decal, 52 Velocity Plus
Decal, 61 Velocity Plus
Decal, 72 Advantage
Decal, 72 Velocity Plus
Decal, Fuel Tank
Decal, Patents
Decal, Traction Control
Decal, Heavy-Duty Commercial
Decal, Metalcraft-Made In USA
Decal, Belt Cover
Decal, Instrument Panel - Upper (Air-Cooled)
Decal, Instrument Panel - Upper (Kawasaki)
Decal, Instrument Panel-Lower
Decal, Cutting Height - Lower
Decal, Fuel Tank Warning
Decal, STT Adjustments
Decal, Turf Tiger
Decal, Turf Tiger
Decal, Stripes-RH
Decal, Stripes-LH
Decal, Tiger
Decal, Warning
Decal, Cutting Height - Upper
Decal, Instrument Panel - Lower (Kawasaki 29DFI only)
Decal, ROPS
Decal, ROPS
Decal, Start / Drive
Decal, Seat Replacement
Spanish Decal Kit, STT (not shown)
DVD Video, Tips for Safe Operation of Your Scag Zero-Turn Mower (not shown)

83

R

STT ELECTRICAL SCHEMATIC (KOHLER)

Kohler STT Schematic

Serial No. 7700001 & Higher

RELAY

MODULE

PLUG

POS

AMPMETER

NEG

AMPMETER

PTO

SWITCH

KEY

SWITCH

ENGINE

CLUTCH

NEG

POS

HOURMETER

GROUND

R.H. NEUTRAL

SWITCH

20 AMP FUSE
20 AMP FUSE

BRAKE

INTERLOCK

SWITCH

SEAT

SWITCH

L.H. NEUTRAL

SWITCH

DIODE

DIODE

GRN W/WHT STRIPE

GRN W/BLK STRIPE

GREEN

RED W/YEL STRIPE

PINK

RED

GRN W/BLK STRIPE

WHITE

BLACK

LIGHT BLUE

ORANGE

BROWN

RED

RED

BLUE

RED

LIGHT BLUE

YEL W/RED STRIPE

RED W/YEL STRIPE

RED

YELLOW

RED

RED

WHITE

WHITE

BLACK

BLACK

GREEN

YEL W/RED STRIPE

RED

RED

PINK

RED

RED

YELLOW

YELLOW

RED

RED

BROWN

ORANGE

BLUE

YELLOW

GRN W/WHT STRIPE

RED

WHITE

RED W/WHT STRIPE

RED

RED

RED

RED W/WHT STRIPE

BLACK

BLUE

RED

BLACK

BLACK

BLACK

DIODE

(600V 2A)

Section 8

84

R

Section 8

RELAY

WATER

TEMP

GAUGE

MODULE

PLUG

POS

AMPMETER

NEG

AMPMETER

PTO

SWITCH

KEY

SWITCH

ENGINE

CLUTCH

NEG

POS

HOURMETER

STARTER

SOLENOID

STARTER

GROUND

FUEL

PUMP

R.H. NEUTRAL

SWITCH

20 AMP FUSE
20 AMP FUSE

BRAKE

INTERLOCK

SWITCH

SEAT

SWITCH

L.H. NEUTRAL

SWITCH

DIODE

DIODE

GRN W/WHT STRIPE

GRN W/BLK STRIPE

GREEN

RED W/YEL STRIPE

RED

RED

WHT W/BLK STRIPE

BLACK

BLACK

PINK

RED

GRN W/BLK STRIPE

WHITE

BLACK

LIGHT BLUE

ORANGE

BROWN

RED

RED

RED

BLUE

RED

LIGHT BLUE

YEL W/RED STRIPE

RED W/YEL STRIPE

YELLOW

RED

RED

WHITE

WHITE

BLACK

BLACK

GREEN

YEL W/RED STRIPE

RED

RED

PINK

RED

RED

YELLOW

YELLOW

RED

RED

BROWN

ORANGE

BLUE

WHT W/BLK STRIPE

YELLOW

GRN W/WHT STRIPE

RED

WHITE

RED W/WHT STRIPE

RED

RED
RED

RED W/WHT STRIPE

BLACK

BLACK

YELLOW

BLACK

BLACK

WHT W/BLK STRIPE

WHITE

BLUE

RED

GRN W/WHT STRIPE

BLACK

BLACK

BLACK

BLACK

RED

RED

Kawasaki 27hp Schematic

DIODE

(600V 2A)

STT ELECTRICAL SCHEMATIC (27HP KAWASAKI)

85

R

ELECTRICAL SCHEMATIC - 29DFI KAWASAKI

RELAY

WATER

TEMP

GAUGE

MODULE

PLUG

POS

AMPMETER

NEG

AMPMETER

PTO

SWITCH

KEY

SWITCH

CHECK

ENGINE

LIGHT

ENGINE

ENGINE

ENGINE

20 AMP

FUSE

CLUTCH

NEG

POS

HOURMETER

STARTER

SOLENOID

STARTER

GROUND

FUEL

PUMP

FUEL

PUMP RELAY

MAIN

RELAY

R.H. NEUTRAL

SWITCH

20 AMP FUSE
20 AMP FUSE

BRAKE

INTERLOCK

SWITCH

SEAT

SWITCH

L.H. NEUTRAL

SWITCH

GRN W/WHT STRIPE

GRN W/BLK STRIPE

GREEN

RED W/YEL STRIPE

RED

RED

WHT W/BLK STRIPE

BLACK

BLACK

PINK

RED

GRN W/BLK STRIPE

WHITE

BLACK

LIGHT BLUE

ORANGE

BROWN

RED

YEL W/RED STRIPE

RED W/YEL STRIPE

RED

RED

BLUE

RED

LIGHT BLUE

YELLOW

RED

RED

WHITE

WHITE

BLACK

BLACK

GREEN

YEL W/RED STRIPE

RED

RED

BLK W/ORG STRIPE

RED

RED

PINK

RED

RED

YELLOW

YELLOW

RED

RED

BROWN

ORANGE

RED
RED

RED

RED

RED

RED

RED

BLACK

BLACK

BLACK

BLACK

BLACK
BLACK

BLACK

BLACK

BLACK

BLACK

RED W/BLUE STRIPE

RED W/GRN STRIPE

RED W/GRN STRIPE

RED W/GRAY STRIPE

BLK W/ORG STRIPE

GRN W/WHT STRIPE

GRN W/WHT STRIPE

RED

RED

RED

RED

BLACK

BLUE

BLUE

YELLOW

BLK W/ORG STRIPE

BLUE

WHT W/BLK STRIPE

YELLOW

GRN W/WHT STRIPE

RED

WHITE

RED W/WHT STRIPE

RED W/WHT STRIPE

RED

RED

Kawasaki 29DFI Schematic

DIODE

DIODE

DIODE

(600V 2A)

Section 8

86

R

Section 8

31BV Briggs & Stratton STT Schematic

RELAY

MODULE

PLUG

POS

AMPMETER

NEG

AMPMETER

PTO

SWITCH

KEY

SWITCH

ENGINE

ADAPTER

CLUTCH

NEG

POS

HOURMETER

GROUND

R.H. NEUTRAL

SWITCH

20 AMP FUSE
20 AMP FUSE

BRAKE

INTERLOCK

SWITCH

SEAT

SWITCH

L.H. NEUTRAL

SWITCH

DIODE

DIODE

GRN W/WHT STRIPE

GRN W/BLK STRIPE

GREEN

RED W/YEL STRIPE

PINK

RED

GRN W/BLK STRIPE

WHITE

BLACK

LIGHT BLUE

ORANGE

BROWN

RED

RED

BLUE

RED

LIGHT BLUE

YEL W/RED STRIPE

RED W/YEL STRIPE

RED

YELLOW

RED

RED

WHITE

WHITE

BLACK

BLACK

GREEN

YEL W/RED STRIPE

RED

RED

PINK

RED

RED

YELLOW

YELLOW

RED

RED

BROWN

ORANGE

BLUE

YELLOW

GRN W/WHT STRIPE

RED

WHITE

RED W/WHT STRIPE

RED

RED

RED

RED W/WHT STRIPE

BLACK

BLUE

RED

BLACK

BLACK

BLACK

RED

RED

YELLOW

WHITE

GRN W/WHT STRIPE

ENGINE

ADAPTER
HARNESS

DIODE

(600V 2A)

STT ELECTRICAL SCHEMATIC (35BVAC Briggs & Stratton)

87

LIMITED WARRANTY - COMMERCIAL EQUIPMENT

Any part of the Scag commercial mower manufactured by Scag Power Equipment and found, in the reasonable judgment of Scag, to
be defective in materials or workmanship, will be repaired or replaced by an Authorized Scag Service Dealer without charge for parts
and labor during the periods specified below. This warranty is limited to the original purchaser and is not transferable. Proof of purchase
will be required by the dealer to substantiate any warranty claims. All warranty work must be performed by an Authorized Scag Service
Dealer.

This warranty is limited to the following specified periods from the date of the original retail purchase for defects in materials or
workmanship:

Wear items including drive belts, blades, hydraulic hoses and tires are warranted for ninety (90) days.•
Batteries are covered for ninety (90) days.•
Frame and structural components including oil reservoir and oil coolers are warranted for two (2) years (parts and labor) for com-•

mercial use or three (3) years / 500 hours (whichever comes first) (parts and labor) for non-commercial use.

Cutter decks are warranted against cracking for a period of three (3) years. (parts and labor 1st and 2nd year; parts only 3rd year.) •
The repair or replacement of the cutter deck will be at the option of Scag Power Equipment. We reserve the right to request compo­nents for evaluation. This warranty does not cover any mower that has been subject to misuse, neglect, negligence, or accident, or
that has been operated in any way contrary to the operating instructions as specified in the Operator’s Manual.

Engines and electric starters are covered by the engine manufacturer’s warranty period.•

Major drive system components are warranted for two (2) years (parts and labor) for commercial use or three (3) year / 500 hour •
(whichever comes first) (parts and labor) for non-commercial use by Scag Power Equipment. (commercial and non-commercial war­ranty excludes fittings, hoses, drive belts). The repair or replacement of the hydraulic pump or hydraulic motor will be at the option of
Scag Power Equipment. This warranty does not cover any mower that has been subject to misuse, neglect, negligence, or accident,
or that has been operated in any way contrary to the operating instructions as specified in the Operator’s Manual.

Electric clutches have a Limited Warranty for two (2) years (parts and labor) for commercial use or three (3) year / 500 hours •
(whichever comes first) (parts and labor) for non-commercial use.

Spindle assemblies have a Limited Warranty for three years (parts and labor 1st year and 2nd; parts only 3rd year).•

Any Scag product used for rental purposes is covered by a 90 day warranty. •

The Scag mower, including any defective part must be returned to an Authorized Scag Service Dealer within the warranty period. The
expense of delivering the mower to the dealer for warranty work and the expense of returning it to the owner after repair will be paid
for by the owner. Scag’s responsibility is limited to making the required repairs and no claim of breach of warranty shall be cause for
cancellation or rescission of the contract of sale of any Scag mower. “Non-Commercial” use is defined as a single property owner,
where the single property is the residence of the owner of the mower. If the mower is cutting more than the owners single property, it is
deemed commercial use and the “non-commercial” warranty does not apply. Scag Power Equipment reserves the right to deny and / or
void the non-commercial warranty if it believes it to be in commercial use.

This warranty does not cover any mower that has been subject to misuse, neglect, negligence, or accident, or that has been
operated in any way contrary to the operating instructions as specified in the Operator’s Manual. The warranty does not apply

to any damage to the mower that is the result of improper maintenance, or to any mower or parts that have not been assembled or
installed as specified in the Operator’s Manual and Assembly Manual. The warranty does not cover any mower that has been altered or
modified, changing performance or durability. In addition, the warranty does not extend to repairs made necessary by normal wear, or
by the use of parts or accessories which, in the reasonable judgment of Scag, are either incompatible with the Scag mower or adversely
affect its operation, performance or durability.

Scag Power Equipment reserves the right to change or improve the design of any mower without assuming any obligation to
modify any mower previously manufactured. All other implied warranties are limited in duration to the two (2) year for commercial

use, three (3) years / 500 hour for non-commercial use or ninety (90) days for mowers used for rental purpose. Accordingly, any such
implied warranties including merchantability, fitness for a particular purpose, or otherwise, are disclaimed in their entirety after the
expiration of the appropriate two year or ninety day warranty period. Scag’s obligation under this warranty is strictly and exclusively
limited to the repair or replacement of defective parts and Scag does not assume or authorize anyone to assume for them any other
obligation. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

Scag assumes no responsibility for incidental, consequential or other damages including, but not limited to, expense for gasoline,
expense of delivering the mower to an Authorized Scag Service Dealer and expense of returning it to the owner, mechanic’s travel time,
telephone or telegram charges, rental of a like product during the time warranty repairs are being performed, travel, loss or damage to
personal property, loss of revenue, loss of use of the mower, loss of time or inconvenience. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you
specific legal rights, and you may also have other rights which vary from state to state.

© 2010
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.