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

R

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

I

R

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

R

III

R

Table of Contents

IV

R

Section 1

SERIAL NUMBER
PLATE LOCATION

R

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.

1

R

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

R

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

R

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

R

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.

5

R

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

R

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

R

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

R

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

R

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