Scag STT-28CAT User Manual
OPERATOR’S
MANUAL
Turf Tiger
Model: STT-28CAT
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 efciency. The specic models that
this book covers are listed on the inside cover. Before operating your machine,
please read all the information enclosed.
© 2008
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.
PART NO. 03244
PRINTED 2/2008
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.
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:
STT61v-28CAT-SS with a serial number of E2000001 to E2099999
STT-28CAT-SS with a serial number of E2100001 to E2199999
SMT-72v with a serial number of E2300001 to E2399999
Always use the entire serial number listed on the serial number tag when referring to this product.
R
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 SAFETY AND INSTRUCTIONAL DECALS .................................................................................................9
SPECIFICATIONSSECTION 3 - ..............................................................................................10
3.1 ENGINE ......................................................................................................................................................10
3.2 ELECTRICAL .............................................................................................................................................10
3.3 POWER HEAD ...........................................................................................................................................10
3.4 CUTTER DECk ..........................................................................................................................................11
3.5 HYDRAULIC SYSTEM ...............................................................................................................................11
3.6 WEIGHTS AND DIMENSIONS ...................................................................................................................11
3.7 PRODUCTIvITY .........................................................................................................................................11
OPERATING INSTRUCTIONSSECTION 4 - ...........................................................................12
4.1 CONTROLS AND INSTRUMENT IDENTIFICATION .................................................................................12
4.2 SAFETY INTERLOCk SYSTEM ................................................................................................................13
4.3 INITIAL RUN-IN PROCEDURES (FIRST DAY OF USE OR APPROxIMATELY 10 HOURS) ...................13
4.4 STARTING THE ENGINE ...........................................................................................................................14
4.5 GROUND TRAvEL AND STEERING .........................................................................................................14
4.6 ENGAGING THE DECk DRIvE (CUTTER BLADES) ................................................................................15
4.7 HILLSIDE OPERATION
4.8 PARkING THE MOWER .............................................................................................................................16
4.9 AFTER OPERATION ..................................................................................................................................16
4.10 REMOvING CLOGGED MATERIAL ........................................................................................................16
4.11 MOvING MOWER WITH ENGINE STOPPED ..........................................................................................17
4.12 RECOMMENDATIONS FOR MOWING
4.13 ADJUSTING CUTTING HEIGHT
4.14 ADJUSTING THE HEIGHT ADJUST PEDAL ..........................................................................................18
4.15 ADJUSTING THE STEERING LEvERS ...................................................................................................18
4.16 TOWING (OPTIONAL HITCH ACCESSORY)...........................................................................................19
..............................................................................................................................16
....................................................................................................17
..............................................................................................................17
TROUBLESHOOTING CUTTING CONDITIONSSECTION 5 - ...............................................20
I
R
Table of Contents
ADJUSTMENTSSECTION 6 - .................................................................................................23
6.1 PARkING BRAkE ADJUSTMENT ............................................................................................................23
6.2 TRAvEL ADJUSTMENTS ..........................................................................................................................24
6.3 THROTTLE CONTROL AND CHOkE ADJUSTMENTS ............................................................................25
6.4 BELT ADJUSTMENT
6.5 BELT ALIGNMENT
6.6 CUTTER DECk ADJUSTMENTS ..............................................................................................................26
MAINTENANCESECTION 7 - ..................................................................................................29
7.1 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS ......................................................29
7.2 LUBRICATION ............................................................................................................................................30
7.3 HYDRAULIC SYSTEM ...............................................................................................................................32
7.4 ENGINE OIL ...............................................................................................................................................33
7.5 ENGINE FUEL SYSTEM ............................................................................................................................33
7.6 ENGINE AIR CLEANER .............................................................................................................................34
7.7 BATTERY ....................................................................................................................................................34
7.8 DRIvE BELTS .............................................................................................................................................35
7.9 CUTTER BLADES ......................................................................................................................................35
7.10 TIRES ........................................................................................................................................................36
7.11 CUTTER DECk GEARBOx .....................................................................................................................37
7.12 COOLING SYSTEM
7.13 BODY, DECk, AND UPHOLSTERY .........................................................................................................38
.................................................................................................................................25
.....................................................................................................................................26
.................................................................................................................................37
ILLUSTRATED PARTS LISTSECTION 8 - ..............................................................................39
8.1 SCAG APPROvED ATTACHMENTS AND ACCESSORIES. .....................................................................39
61v & 72v CUTTER DECk ..............................................................................................................................40
CUTTER DECk CONTROLS ...........................................................................................................................42
SHEET METAL COMPONENTS ......................................................................................................................44
STT ROLL-OvER PROTECTION SYSTEM - WITH SUSPENSION SEAT ......................................................46
DECk DRIvE COMPONENTS .........................................................................................................................48
ENGINE & ATTACHING PARTS - (28HP CAT DIESEL) ..................................................................................50
RADIATOR & ATTACHING PARTS - (28HP CAT DIESEL) .............................................................................52
BRAkE AND STEERING COMPONENTS ......................................................................................................54
FUEL AND HYDRAULIC SYSTEM - (28HP CAT DIESEL) .............................................................................56
BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN .................................................................58
ELECTRICAL SYSTEM (28HP CAT DIESEL) .................................................................................................60
REPLACEMENT DECALS AND INFORMATION PLATES
ELECTRICAL SCHEMATIC (28HP CAT DIESEL) ...........................................................................................64
.............................................................................62
LIMITED WARRANTY - COMMERCIAL EqUIPMENT .................................Inside Back Cover
II
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
industry. 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.
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 OF OTHER THAN ORIGINAL SCAG REPLACEMENT
PARTS WILL vOID THE WARRANTY.
When ordering parts, always give the model and serial
number of your mower. The serial number plate is located
where shown in Figure 1-1.
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
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
Mower Serial Number Plate LocationFigure 1-1.
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 important 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
STT MODELS
Cutting Element - Engage
Cutting Element - Disengage
CE Mark
Seat must be installed under the seat
hold down bracket during installation.
Failure to secure the seat under the hold
down bracket could result in serious
injury or death in a roll over.
Thrown Object Hazard
Read Operator's Manual
Keep Bystanders Away
2
R
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
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 irrepairable 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
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.
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.
3
R
Section 2
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.
12.
DO NOT add fuel to a running or hot engine. Allow
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.
Equipment must comply with the latest requirements 14.
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 15.
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 16.
for proper tightness.
Make sure all hydraulic fluid connections are tight 17.
and all hydraulic hoses and lines are in good
condition before starting 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.
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. ALWAYS FOLLOW OSHA APPROvED
OPERATION.
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.
To prevent tipping or loss of control, start and stop 3.
smoothly, avoid unnecessary turns and travel at
reduced speed.
4
R
Section 2
When using any attachment, never direct the 4.
discharge of material toward bystanders or allow
anyone near the machine while in operation.
CAUTION
Before attempting to start the engine, with the 5.
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 6.
engine, remove the ignition key, and wait for all
movement to stop before removing the obstruction.
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 7.
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. 8.
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.9.
Disengage power to cutter deck before crossing 10.
roads, walks or gravel drives.
Mow only in daylight or good artificial light.11.
NEVER raise the deck with the blades engaged.12.
Take all possible precautions when leaving the 13.
machine unattended, such as disengaging the
mower, lowering the attachments, setting the parking
brake, stopping the engine, and removing the key.
Do not touch the engine or the muffler while the
engine is running or immediately after stopping.
These areas may be hot enough to cause a
burn.
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 16.
moving parts. Contact can injure.
Transport the mower using a heavy duty trailer 17.
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 18.
trailers or trucks. Use only a full width ramp. Ramp
angle should be no more than 15 degrees. Back up
the ramp and drive down forward.
When transporting the mower, make sure the park 19.
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, 20.
cable, or ropes. Both front and rear straps must be
directed down and outward from machine.
Use care when approaching blind corners, shrubs, 21.
trees, or other objects that may obscure vision.
NEVER leave the machine running unattended.22.
Disengage power to the attachments when 14.
transporting or when not in use.
The machine and attachments should be stopped 15.
and inspected for damage after striking a foreign
object, and damage should be repaired before
restarting and operating the machine.
5
R
Section 2
UPRIGHT AND
LOCkED POSITION
TENSION
kNOBS
TENSION
kNOB
HAIR PIN
LOCk PIN
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, loosen the tension knob on both 1.
the left hand and right hand bar. See Figure 2-1.
Remove the hairpin cotter pins and remove the two 2.
(2) lock pins. See Figure 2-2.
Lower the roll bar to the down position.3.
To raise the roll bar, lift the bar to the upright 4.
position.
Install the two (2) lock pins through the hole, secure 5.
with the two (2) hairpin cotter pins and tighten the
tension knobs. See Figure 2-2. Remove the seat belt
from the retainer brackets.
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.
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.
6
R
Section 2
INSPECT WEBBING
INSPECT BUCkLE
& LATCH
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.
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.
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.
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.
Seat Belt InspectionFigure 2-3.
Back up the ramp and drive down forward.
7
R
MAINTENANCE CONSIDERATIONS & 2.6
STORAGE
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.
Section 2
WARNING
Hydraulic fluid is under high pressure. keep
body and hands away from pinholes or nozzles
that eject hydraulic fluid under high pressure.
If you need service on your hydraulic system,
please see your authorized Scag dealer. If
hydraulic fluid is injected into the skin, it must be
surgically removed within a few hours by a doctor
or gangrene may result.
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.
4.
Keep all nuts, bolts and screws tight, to ensure the
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.
8.
NEVER allow untrained personnel to service the
machine.
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.
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.
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.
8
R
Section 2
390S0150F
483395
483406
483407
483402
483444
483154
WARNING
INSTALL BELT COVER BEFORE
OPERATING MACHINE
READ OPERATOR'S MANUAL
481568
FORWARD
REVERSE
F
R
483429
483633
!
CAUTION
DIESEL FUEL ONLY
Avoid injury from burns.
Shut off engine before
removing fuel tank cap.
483395
483154
!
WARNING
483444
START / DRIVE PROCEDURE
AVOID SERIOUS INJURY OR DEATH
483425
SAFETY AND INSTRUCTIONAL DECALS2.7
9
R
Section 3
SPECIFICATIONS
ENGINE3.1
General Type ....................................................................................................Heavy Duty Industrial/Commercial Diesel
Brand ..................................................................................................................................................... CAT 28HP Diesel
Model ......................................................................................................................................................................... C1.1
Horsepower .................................................................28 HP at 3200 RPM (Model STT61V-28CAT-SS, STT-28CAT-SS)
Type .....................................................................................4 Stroke Diesel, 3 Cylinder, Horizontal Shaft, Liquid-Cooled
Displacement ...........................................................................................................................................................1.13L.
Cylinders ..........................................................................................................................................................................3
Governor ........................................................................Mechanical Type with Variable Speed Control Set At 3200 RPM
Idle Speed ........................................................................................................................................................1200 RPM
Fuel Pump .................................................................................................................Electric Fuel Pump with in-line filter
Fuel ......................................................................................................... Diesel Fuel with a minimum cetane rating of 40
Oil Pump Group ......................................................................................... Pressure Lube, 5.2 U.S. Quarts with Oil Filter
Starter ............................................................................................................Electric Starting with Solenoid Shift Starter
Belts: ................................................................................................................Kevlar cord. Self-adjusting, Self-tightening
Deck Drive Belt ................................................................................................................ Scag Part Number - 481460
Pump Drive Belt (29HP & Higher) ................................................................................... Scag Part Number - 483735
ElECTrICAl3.2
Battery .....................................................................................................................12 Volt, Maintenance Free (525CCA)
Charging System ............................................................................................................................................... Alternator
Charging Output .......................................................................................................................................12 Volt, 40 Amp
System Polarity .......................................................................................................................................Negative Ground
Starter ..................................................................12 Volt Electric Ring Gear Type, Key and Solenoid Operated Interlock
Switches ..................................................................... Seat, Neutral Control, Mower Engagement (BBC), Parking Brake
Instrument Panel ............................................Volt Meter, Key Switch, Throttle Lever, BBC Switch, Temperature Gauge,
Fuses, Safety Start Module, Oil Pressure Gauge, Glow Plug Indicator
Fuses ..................................................................................................................Two (1) 20 Amp, (1) 50 Amp Resettable
POwEr hEAd3.3
Drive System ................Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-iron High Torque Motors
Hydrostatic Pumps ................................................................Two Hydro-Gear™ BDP 16A Pumps with Dump Valves for
movement without running the engine and pressure relief valves
Drive Wheel Motors ...........................................Two Hydro-Gear Model 18E, 18 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 .............................................................................................................................. 13 X 6.00 Four Ply
(2) Drive ............................................................. 24X12.0X12 Four-Ply Pneumatic Tubeless, Radius Edge, 61" & 72"
Tire Pressure:
Front Caster....................................................................................................................................................Flat Free
Drive .................................................................................................................................................................. 12 PSI
Fuel Tank .......................................10-Gallon Seamless Polyethylene Tank with large opening and Fuel Gauge Fill Cap
Seat ..........................................................................................................................................Padded, Suspension Seat
Travel Speed:
Forward .................................................................................................................................................................0-12
Reverse ..........................................................................................................................................................0-6 MPH
-NOTE- The machine will travel at 12mph for transport purposes. For best cutting performance the forward travel
speed should be adjusted depending upon the cutting conditions.
10
R
Section 3
CuTTEr dECk3.4
Type ...........................Floating, Adjustable, Anti-scalping, Hybrid Design Combines Out-front and Belly-mount Designs
Construction ..........................10-gauge steel reinforced with 7-gauge (3/16") Support Plate. 7-gauge (3/16") deck skirt.
True Cutting Width:
61V ........................................................................................................................................................61" (155.0 cm)
72V ........................................................................................................................................................72" (182.9 cm)
Cutting Height Adjustment .......Foot Operated Lever Adjustment from Operator's Seat, 1.00" to 6.00" in 1/4"increments
Cutter Blades ..................................................................................0.197 Thick, Milled Edge, Wear Resistant Marbain™
61V .............................................................................................................................................. Three (3) 21" blades
72V ........................................................................................................................................... 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 11.5" Discharge Opening with Spring Loaded Discharge Chute
Discharge Chute ...................................................................................................Black, Polypropylene (Plastic), Flexible
Caster Wheels ..................................................................................................................................... 13 X 6.00 Four-Ply
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
61V .................................................................................................................................. Scag Part Number - 481558
72V .................................................................................................................................. Scag Part Number - 481980
Electric Clutch Type .........................................................................................................................Ogura Electric Clutch
Drive Shaft ............................................................................................Clamp Yoke Shaft With Two High Speed U-Joints
hydrAulIC SySTEm3.5
Hydraulic Oil Filter ......................................................................................................... 10 Micron Spin-on Element Type
Hydraulic Reservoir .....................................................................................................................Nylon; 3 Quart Capacity
wEIGhTS ANd dImENSIONS SmT61V SmT72V3.6
Length...............................................................................................................................87.5" ................................87.5"
Tracking Width ................................................................................................................... 55" ....................................55"
Overall Width w/chute down .............................................................................................73.5" ...................................83"
Overall Width w/chute up ................................................................................................... 62" ....................................73"
Overall Height w/ROPS up ...............................................................................................67.5" ................................67.5"
Overall Height w/ROPS down ...........................................................................................56.5" ................................56.5"
Operating Weight .............................................................................................................1700# .............................1750#
PrOduCTIVITy SmT61V SmT72V3.7
Cutting Width ..................................................................................................................... 61" ....................................72"
Acres Per Day ................................................................................................................... 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 an allowance for overlap and turns.
11
R
OPERATING INSTRUCTIONS
H
aljalefja
irjf;o3rf
afkrjf;w
sorgf
aljalefja
irjf;o3rf
aljalefja
irjf;o3rf
OFF
OFF
OFF
C
LEFT STEERING
CONTROL
HOURMETER
FUEL GAUGE
DUMP VALVE
FUSES
ENGINE
THROTTLE
CONTROL
RIGHT STEERING
CONTROL
DECK LIFT
DECK RELEASE
PARKING BRAKE
CONTROL
CUTTING HEIGHT
ADJUSTMENT
SEAT BELT
483762
GLOW
PLUGS
OFF
ON
START
PREHEAT
MOWER DECK
PULL OUT TO ENGAGE
PUSH IN TO DISENGAGE
WATER TEMPERATURE
MOWER DECK SWITCH
OIL PRESSURE
IGNITION SWITCH
VOLTMETER
GLOW PLUG INDICATOR
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.
Section 4
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.
Glow Plug Indicator (Figure 4-1).
3. Yellow indicator
turns on when the key switch is turned to the
PREHEAT position. Glow plugs must be preheated
for 5 to 10 seconds before starting the engine.
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.
voltmeter (Figure 4-1).5. Indicates the condition of
the charging system. When the engine is running, in
normal operating conditions, the needle should be in
the 12 to 14 volt range.
Ignition Switch (Figure 4-1).1. The ignition switch
is used to start the engine and has four positions;
PREHEAT, OFF, ON, and START.
Oil Pressure (Figure 4-1). 6. Indicates engine oil
pressure. Reference the engine operator's manual
for further information.
Controls and InstrumentsFigure 4-1.
12
R
Section 4
DUMP VALVE
CONTROL
2007 STTDVC
Hour meter (Figure 4-1).7. Indicates the number of
hours the engine has been operated. It operates
whenever 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).
8. There are one 20-amp
fuse and one 50-amp resettable fuse that protect the
mower’s electrical system. To replace fuse, pull fuse
out of the socket and install a new fuse.
9. 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).10. Used to
control the mower's right wheel when traveling
forward or reverse.
Parking Brake Control (Figure 4-1). 11. Used to
engage and disengage the parking brakes. Pull the
lever back to engage the parking brakes. Push the
lever forward to disengage the parking brakes.
Cutting Height Adjustment (Figure 4-1).15. Used to
set the cutter deck at the desired cutting height.
Deck Release Lever (Figure 4-1).
16. Used to lock
the cutter deck in the transport position. Push the
foot pedal forward and lift up on the release lever to
release the cutter deck for normal mowing.
Temperature Gauge (Figure 4-1).17. Indicates the
operating temperature of the engine.
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.
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.
Fuel Tank Gauge (Figure 4-1)12. . Indicates the
amount of fuel in the fuel tank.
Dump valve Control Levers (Figure 4-2). 13. 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 10ft/lbs
during operation of the mower. Rotating the levers
counter-clockwise allows the mower to be moved by
hand (free-wheeling).
Dump Valve ControlFigure 4-2.
Deck Lift Foot Lever (Figure 4-1). 14. Used to raise
and lower the cutter deck.
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.
INITIAL RUN-IN PROCEDURES (FIRST 4.3
DAY OF USE OR APPROxIMATELY 10
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.)
Check tire pressure. Adjust pressure if 6.
necessary. (See Section 7.10)
13
R
Section 4
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 completely open. (See Section 7.5
Page 35)
Secure the ROPS in the upright and locked position.2.
Sit in the operator’s seat, fasten seat belt and place 3.
the steering control levers in the neutral position.
Engage the parking brake.
4.
Place the PTO switch in the disengaged position.5.
- IMPoRtANt -
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 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.
Move the engine throttle control to about half engine 6.
speed.
Turn the ignition key to the PREHEAT position 7.
for approximately 5 to 10 seconds to allow the
glow plugs to preheat before starting the engine.
Then 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.
Allow engine to warm before operating the mower.8.
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. Practice until you are comfortable
with the handling of the machine before attempting
to mow. Learn the operation on flat ground before
operating on slopes.
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.
- 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 4.13 on Page 18 for cutter deck raising
instructions)
14
R
Section 4
390S0138
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE
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
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 both handles back. Keep the travel
speed low while traveling in reverse.
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, (Figure 4-3)
to the engage position.
Cutter engage SwitchFigure 4-3.
- 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.
To stop the reverse travel, allow the steering control levers
to return to the neutral position. If the mower is to be parked,
engage the parking brake.
- 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.
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.
15
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. 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.
To prevent tipping or loss of control, do not start or 2.
stop suddenly, avoid unnecessary turns and travel
at reduced speed. If tires lose traction, disengage
blades and proceed slowly off the slope.
Avoid sudden starts when mowing uphill. Sudden 3.
starts may cause the machine to tip backwards.
Loss of traction may occur when traveling down hill.
4.
Weight transfers to the front of the machine and
may cause the drive wheels to slip causing loss of
braking or steering.
5.
Keep tires properly inflated.
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.
4.
After the mower has cooled down, fill the fuel tank
with fresh, clean fuel with a minimum cetane rating
of 40 at the end of every day of operation.
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.
Engage the parking brake.5.
Turn the ignition key to the OFF position and remove 6.
the key.
16
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.
R
Section 4
DUMP VALVE
CONTROL
2007 STTDVC
CUTTING
HEIGHT
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
1
48
1
54
3
390S0140-2
HEIGHT ADJUSTMENT PEDAL
LANYARD
PIN
MOvING MOWER WITH ENGINE 4.11
STOPPED
To “free-wheel” or move the mower around without the
engine running, place the dump valve levers in the FREEWHEEL position (Figure 4-4). Disengage the parking brake
and move the mower by hand. The dump valve levers must
be returned to the DRIVE position and torqued to 10ft/lbs
to drive the mower.
Keep mower and discharge chute clean.
4.
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-inch to
6 inches at 1/4-inch intervals. To adjust the cutting height:
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
DO NOT operate without Discharge Chute,
Mulching kit, or entire Grass Catcher properly
installed.
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.
Push the cutting height adjustment foot pedal all 1.
the way forward using your right foot until it locks in
place. (Figure 4-5).
Insert the lanyard pin into the cutting height index at 2.
the desired cutting height. Push forward on the deck
lift foot lever, hold in place and lift up on the deck
release lever, (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. (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.
17
Loading...