Scag Power Equipment STT52A-27CH User manual

MODEL STT
OPERATOR’S MANUAL
THIS MANUALCONTAINS THE OPERATING
INSTRUCTIONS AND SAFETY INFORMA-
TION FOR YOUR SCAG MOWER. READING
THIS MANUAL CAN PROVIDE YOU WITH
ASSISTANCE IN MAINTENANCE AND AD-
JUSTMENT PROCEDURES TO KEEP YOUR
MOWER PERFORMING TO MAXIMUM EFFI-
CIENCY. THE SPECIFIC MODELS THATTHIS
BOOK COVERS ARE CONTAINED ON THE
INSIDECOVER. BEFORE OPERATINGYOUR
MACHINE, PLEASE READ ALL THE INFOR-
MATION ENCLOSED.
PART NO. 03164
PRINTED10/04
PRINTED IN USA
©2004
SCAGPOWEREQUIPMENT
DIVISION OF METALCRAFT OF MAYVILLE, INC.

FAILURE TO FOLLOW SAFE OPERATING PRACTICES
MAY RESULT IN SERIOUS INJURY.
* Keepall shields in place,especially the grass dischargechute.
* 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.
* Read this manual completely as well as other manuals that came
with your mower.
* Keep others off the tractor (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.
WARNING:
Alwaysusetheentireserialnumber listed on the serial number
tag when referring to this product.
Thismanualcoverstheoperatinginstructions
andillustratedparts list for:
STT52A-27CH with a serial number of A5900001 to A5999999
STT61A-27CH with a serial number of A6000001 to A6099999
STT61A-27KA with a serial number of A6200001 to A6299999
STT61A-29DFI-SS with a serial number of A6500001 to A6599999
STT61A-31BV-SS with a serial number of A6700001 to A6799999
STT61A-27CH-NS with a serial number of B0000001 to B0099999
STT-27KA with a serial number of A6800001 to A6899999
STT-29DFI-SS with a serial number of A9500001 to A9599999
STT-31BV-SS with a serial number of A9600001 to A9699999
SMT-52A with a serial number of A7100001 to A7199999
SMT-61A with a serial number of A7200001 to A7299999
SMT-61A (31BV) with a serial number of A7300001 to A7399999
SMST-72A with a serial number of A7600001 to A7699999

I
TABLE OF CONTENTS
SUBJECT PAGE
Section 1 - General Information
1.1 Introduction .............................................................................................................................1
1.2 Directional Reference.............................................................................................................1
1.3 Servicing the Engine and DriveTrain Components ................................................................1
1.3 Symbols ............................................................................................................................... 2-3
Section 2 - Safety Information
2.1 Introduction .............................................................................................................................4
2.2 SignalWords ...........................................................................................................................4
2.3 Considerations Before Operation ...........................................................................................4
2.4 Operation Considerations ........................................................................................................5
2.5 Roll Over Protection System (Optional) .................................................................................7
2.6 Maintenance Considerations ...................................................................................................8
2.7 Safety and Instructional Decals ..............................................................................................9
Section 3 - Specifications ....................................................................................................10-11
Section 4 - Operating Instructions
4.1 Controls and Instrument Identification ..................................................................................12
4.2 Safety Interlock System........................................................................................................13
4.3 Initial Run-In Procedures......................................................................................................14
4.4 Starting the Engine ................................................................................................................14
4.5 Ground Travel and Steering ..................................................................................................14
4.6 Engaging the Deck Drive .....................................................................................................15
4.7 HillsideOperation .................................................................................................................16
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 .............................................................................................17
4.13 Adjusting Cutting Height .......................................................................................................17
4.14 Towing ..................................................................................................................................18
Section 5 - Troubleshooting Cutting Conditions............................................................. 19-21

II
TABLE OF CONTENTS (CONT'D)
SUBJECT PAGE
Section 6 - Adjustments
6.1 Parking Brake Adjustment ....................................................................................................22
6.2 TravelAdjustments ...............................................................................................................22
6.3 Throttle Control and ChokeAdjustments..............................................................................24
6.4 BeltAdjustment ....................................................................................................................24
6.5 BeltAlignment ......................................................................................................................24
6.6 Cutter Deck Adjustments .....................................................................................................25
Section 7 - Maintenance
7.1 Maintenance Chart ...............................................................................................................28
7.2 LubricationFittingPoints ......................................................................................................29
7.3 Hydraulic System ..................................................................................................................31
7.4 EngineOil .............................................................................................................................32
7.5 Engine Fuel System ..............................................................................................................32
7.6 EngineAir Cleaner................................................................................................................33
7.7 Battery ..................................................................................................................................34
7.8 Drive Belts ............................................................................................................................35
7.9 Cutter Blades ........................................................................................................................35
7.10 Tires ......................................................................................................................................36
7.11 Cutter Deck Gearbox ...........................................................................................................36
7.12 Kawasaki Cooling System ....................................................................................................37
7.13 Body, Deck, Hopper and Upholstery ....................................................................................38
Section 8 - Replacement Parts
Notes ..............................................................................................................................................39
STT52A, STT61A Cutter Deck ............................................................................................... 40-41
STT72A Cutter Deck ............................................................................................................... 42-43
Cutter Deck Controls................................................................................................................ 44-45
Sheet Metal Components.......................................................................................................... 46-47
STT Roll Over Protection System without Suspension Seat .................................................... 48-49
STT Roll Over Protection System with Suspension Seat ......................................................... 50-51
Deck Drive Components .......................................................................................................... 52-53
Engine and Attaching Parts (Kohler)........................................................................................ 54-55
Engine and Attaching Parts (Kawasaki & Briggs & Stratton)................................................. 56-57
Brake and Steering Components .............................................................................................. 58-59
Fuel and Hydraulic System ....................................................................................................... 60-61
Fuel and Hydraulic System (Kawasaki 29DFI) ....................................................................... 62-63
Hydraulic Pump (BDP-16A) .................................................................................................... 64-65
Hydraulic Pump with Cooling Fan (BDP-16A)........................................................................ 66-67
Electrical System (Kohler & Briggs & Stratton)...................................................................... 68-69
Electrical System (Kawasaki 27HP) ........................................................................................ 70-71
Electrical System (Kawasaki 29DFI)....................................................................................... 72-73
Replacement Decals................................................................................................................. 74-75
Electrical Schematic (Kohler) ........................................................................................................76
Electrical Schematic (Kawasaki 27HP) .........................................................................................77
Electrical Schematic (Kawasaki 29DFI)........................................................................................78
Electrical Schematic (Briggs & Stratton 31BV) ............................................................................79
Warranty Statement..............................................................................................followingsection 8

1
GENERAL INFORMATION
1.1 INTRODUCTION
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.
USE OF OTHER THAN ORIGINAL SCAG
REPLACEMENT PARTS WILL VOID THE
WARRANTY.
When ordering parts, always give the model and serial
number of your tractor. The serial number plate is
located where shown in Figure 1-1.
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.
1.2 DIRECTION REFERENCE
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.
1.3 SERVICING THE ENGINE AND DRIVE
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.
Section 1
Figure 1-1Tractor Serial Number Plate Location
390S0137A
SERIAL NUMBER
PLATE LOCATION
R
MODEL
SERIAL
DivisionofMetalcraftofMayville,Inc.
Mayville,Wisconsin53050
PatentsIssuedandPending
MANUFACTUREDUNDERONEORMORE
OF THEFOLLOWINGPATENTS:
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
WARNING:
USE ONLY SCAG APPROVED ATTACHMENTS
AND ACCESSORIES.
Attachments and accessories manufactured by companies
otherthanScagPowerEquipmentarenotapprovedforuse
on this machine.
Scag approved attachments and accessories:
GC-STT(p/n 9016,9017,9039)
GC-STT-CS(p/n9019, 9020, 9041)
Mulch Plate (p/n 9260, 9261, 9262)
Hurricane Mulch (p/n 9265, 9266, 9267)
Cup Holder (p/n 9240)
STT Hitch (p/n 9242)
STT Bumper (p/n 9256)
STT - Suspension Seat (p/n 9270)
STT - Lights (p/n 9279)
Tiger Striper (p/n 9269)
Blade Buddy (p/n 9212)