Scag Power Equipment Turf Tiger Diesel Powered STT-28CAT User manual

PART NO. 03330
PRINTED 10/2012
PRINTED IN USA
© 2013
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.
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 efciency. The specic models that
this book covers are listed on the inside cover. Before operating your machine,
please read all the information enclosed.
OPERATOR’S
MANUAL
TurfTiger
DieselPowered
Model: STT-28CAT

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:
STT61V-28CAT with a serial number of H9400001 to H9499999
STT-28CAT with a serial number of J0000001 to J0099999
SMT-72V with a serial number of J1200001 to J1299999
Always use the entire serial number listed on the serial number tag when referring to this product.

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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.....................................................................................................................9
2.8 SAFETY AND INSTRUCTIONAL DECALS...............................................................................................10
SPECIFICATIONSSECTION 3 - ..............................................................................................11
3.1 ENGINE ......................................................................................................................................................11
3.2 ELECTRICAL .............................................................................................................................................11
3.3 POWER HEAD ...........................................................................................................................................11
3.4 CUTTER DECK ..........................................................................................................................................12
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 (FIRST DAY OF USE OR APPROXIMATELY 10 HOURS) ...................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..............................................................................................................19
4.14 ADJUSTING THE HEIGHT ADJUST PEDAL ..........................................................................................19
4.15 ADJUSTING THE STEERING LEVERS...................................................................................................20
4.16 TOWING (OPTIONAL HITCH ACCESSORY)...........................................................................................20
TROUBLESHOOTING CUTTING CONDITIONSSECTION 5 - ...............................................21

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Table of Contents
ADJUSTMENTSSECTION 6 - .................................................................................................24
6.1 PARKING BRAKE ADJUSTMENT ............................................................................................................24
6.2 TRAVEL ADJUSTMENTS ..........................................................................................................................25
6.3 THROTTLE CONTROL ADJUSTMENTS...................................................................................................26
6.4 BELT ADJUSTMENT .................................................................................................................................26
6.5 BELT ALIGNMENT.....................................................................................................................................27
6.6 CUTTER DECK ADJUSTMENTS ..............................................................................................................27
6.7 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....................................................................................................................................................36
7.8 DRIVE BELTS.............................................................................................................................................37
7.9 CUTTER BLADES......................................................................................................................................37
7.10 TIRES........................................................................................................................................................38
7.11 CUTTER DECK GEARBOX .....................................................................................................................39
7.12 COOLING SYSTEM .................................................................................................................................39
7.13 BODY, DECK, AND UPHOLSTERY .........................................................................................................40
ILLUSTRATED PARTS LISTSECTION 8 - ..............................................................................41
8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES......................................................................41
61V & 72V CUTTER DECK..............................................................................................................................42
CUTTER DECK CONTROLS ...........................................................................................................................44
SHEET METAL COMPONENTS ......................................................................................................................46
STT ROLL-OVER PROTECTION SYSTEM .....................................................................................................48
STT SUSPENSION SEAT ................................................................................................................................50
DECK DRIVE COMPONENTS .........................................................................................................................52
ENGINE & ATTACHING PARTS - CAT DIESEL ..............................................................................................54
RADIATOR & ATTACHING PARTS - CAT DIESEL..........................................................................................56
BRAKE AND STEERING COMPONENTS ......................................................................................................58
FUEL AND HYDRAULIC SYSTEM - CAT DIESEL..........................................................................................60
BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN.................................................................62
ELECTRICAL SYSTEM - CAT DIESEL ...........................................................................................................64
REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................66
ELECTRICAL SCHEMATIC - CAT DIESEL .....................................................................................................68
LIMITED WARRANTY - COMMERCIAL EQUIPMENSECTION 9 - T ........Following Section 8

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Section 1
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 ONTHIS PRODUCT
BY OTHERTHANTHE MANUFACTURER'S AUTHORIZED
REPLACEMENT PART MAY ADVERSELY AFFECT THE
PERFORMANCE, DURABILITY OR SAFETY OF THIS
PRODUCT.
USE OF OTHERTHAN 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.
SERIAL NUMBER
PLATE LOCATION
MODEL
SERIAL
Division of Metalcraft of Mayville, Inc.
Mayville, Wisconsin 53050
Patents: www.scag.com/patents/html
R
Mower Serial Number Plate LocationFigure 1-1.
GENERAL INFORMATION
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 DRIVE1.3
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 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.