Scag Power Equipment Turf Tiger STT52V-26CH-EFI User manual

PART NO. 03364
PRINTED 9/2013
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
Models: STT52V-26CH-EFI
STT61V-25KA
STT61V-26CH-EFI
STT61V-26DFI
STT61V-35BVAC
STT72V-26CH-EFI
STT72V-26DFI
STT72V-35BVAC

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-26CH-EFI with a serial number of K1400001 to K1499999
STT61V-25KA with a serial number of K1700001 to K1799999
STT61V-26CH-EFI with a serial number of K1900001 to K1999999
STT61V-26DFI with a serial number of K2000001 to K2099999
STT61V-35BVAC with a serial number of K2200001 to K2299999
STT72V-26CH-EFI with a serial number of K2500001 to K2599999
STT72V-26DFI with a serial number of K2600001 to K2699999
STT72V-35BVAC with a serial number of K2700001 to K2799999
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.....................................................................................................................8
2.8 SPARK IGNITION SYSTEM .........................................................................................................................8
2.9 SAFETY AND INSTRUCTIONAL DECALS.................................................................................................9
SPECIFICATIONSSECTION 3 - ..............................................................................................10
3.1 ENGINE ......................................................................................................................................................10
3.2 ELECTRICAL .............................................................................................................................................10
3.3 POWER HEAD ...........................................................................................................................................11
3.4 CUTTER DECK ..........................................................................................................................................11
3.5 HYDRAULIC SYSTEM ...............................................................................................................................12
3.6 WEIGHTS AND DIMENSIONS...................................................................................................................12
3.7 PRODUCTIVITY .........................................................................................................................................12
OPERATING INSTRUCTIONSSECTION 4 - ...........................................................................13
4.1 CONTROLS AND INSTRUMENT IDENTIFICATION ................................................................................13
4.2 SAFETY INTERLOCK SYSTEM ................................................................................................................14
4.3 INITIAL RUN-IN PROCEDURES................................................................................................................15
4.4 STARTING THE ENGINE ...........................................................................................................................15
4.5 GROUND TRAVEL AND STEERING .........................................................................................................15
4.6 ENGAGING THE DECK DRIVE (CUTTER BLADES)................................................................................16
4.7 HILLSIDE OPERATION..............................................................................................................................17
4.8 PARKING THE MOWER .............................................................................................................................17
4.9 AFTER OPERATION ..................................................................................................................................17
4.10 REMOVING CLOGGED MATERIAL ........................................................................................................17
4.11 MOVING MOWER WITH ENGINE STOPPED..........................................................................................18
4.12 RECOMMENDATIONS FOR MOWING ....................................................................................................18
4.13 ADJUSTING CUTTING HEIGHT..............................................................................................................18
4.14 ADJUSTING THE STEERING LEVERS...................................................................................................19
4.15 ADJUSTING THE HEIGHT ADJUST PEDAL ..........................................................................................19
4.16 TOWING (OPTIONAL HITCH ACCESSORY)...........................................................................................20

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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 ...................................................................................................29
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........................................................................................................................................................40
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
NOTES..............................................................................................................................................................55
DECK DRIVE COMPONENTS .........................................................................................................................57
ENGINE AND ATTACHING PARTS - KOHLER ...............................................................................................58
ENGINE & ATTACHING PARTS - 25KA, 26DFI KAWASAKI & 35BVAC........................................................60
BRAKE AND STEERING COMPONENTS ......................................................................................................62
STT HYDRAULIC SYSTEM .............................................................................................................................64
STT FUEL SYSTEM .........................................................................................................................................66
BDP-16A HYDRAULIC PUMP ASSEMBLY.....................................................................................................68

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BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN (26DFI & 35BVAC) .................................70
ELECTRICAL SYSTEM - 25KA - KAWASAKI.................................................................................................72
ELECTRICAL SYSTEM - 26CH-EFI - KOHLER ..............................................................................................74
ELECTRICAL SYSTEM - 26DFI - KAWASAKI ................................................................................................76
ELECTRICAL SYSTEM - 35BVAC - BRIGGS & STRATTON .........................................................................78
REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................80
STT ELECTRICAL SCHEMATIC (25KA - KAWASAKI) ..................................................................................82
STT ELECTRICAL SCHEMATIC (26CH-EFI - KOHLER)................................................................................83
ELECTRICAL SCHEMATIC (26DFI - KAWASAKI) .........................................................................................84
STT ELECTRICAL SCHEMATIC (35BVAC BRIGGS & STRATTON) .............................................................85
LIMITED WARRANTY - COMMERCIAL EQUIPMENSECTION 9 - T ................ Following Section 8