Scag Power Equipment STC User manual

MODEL STC
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. 03194
PRINTED 7/2006
PRINTED IN USA
©2006
SCAGPOWEREQUIPMENT
DIVISION OF METALCRAFT OF MAYVILLE, INC.

FAILURE TO FOLLOW SAFE OPERATING PRACTICES
MAY RESULT IN SERIOUS INJURY.
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.
Thismanualcoverstheoperatinginstructions
andillustratedparts list for:
STC48V-19KAI with a serial number of C6000001 to C6099999
STC48V-23CV with a serial number of C6200001 to C6299999
STC52V-23KA with a serial number of C6300001 to C6399999
STC52V-24HN with a serial number of C6400001 to C6499999
SMTC-48V with a serial number of C7000001 to C7099999
SMWC-52V with a serial number of C7100001 to C7199999
Alwaysusetheentireserial number listed on the serialnumber
tag when referring to this product.
WARNING:
* 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.
* 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)
* 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 OSHAAPPROVED
OPERATION.
* DO NOT mow on wet grass. Wet grass reduces traction and steering
control.

I
TABLE OF CONTENTS
4.14 Towing ................................................................................................................................. 19
4.15 AdjustingtheSteering Levers ...............................................................................................19
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 Before Operation Considerations ...........................................................................................4
2.4 OperationConsiderations........................................................................................................5
2.5 Roll Over Protection System ..................................................................................................7
2.6 Maintenance Considerations ...................................................................................................9
2.7 Safety and Instructional Decals ............................................................................................ 10
Section 3 - Specifications......................................................................................................11-1
Section 4 - Operating Instructions
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 GroundTravel and Steering ................................................................................................. 15
4.6 Engagingthe Deck Drive ......................................................................................................16
4.7 HillsideOperation ................................................................................................................. 17
4-8 Parking the Mower............................................................................................................... 17
4.9 After Operation .................................................................................................................... 17
4.10 RemovingCloggedMaterial ................................................................................................. 18
4.11 Moving Mower with EngineStopped ................................................................................... 18
4.12 Recommendationsfor Mowing ............................................................................................ 18
4.13 AdjustingCuttingHeight....................................................................................................... 18
Section 5 -Troubleshooting Cutting Conditions............................................................... 20-22

II
TABLE OF CONTENTS (CONT'D)
SUBJECT PAGE
Section 6 - Adjustments
6.1 Parking BrakeAdjustment ....................................................................................................23
6.2 TravelAdjustments ...............................................................................................................24
6.3 Throttle Control and ChokeAdjustments ..............................................................................25
6.4 BeltAdjustment ....................................................................................................................25
6.5 BeltAlignment ......................................................................................................................25
6.6 Cutter Deck Adjustments .....................................................................................................26
Section 7 - Maintenance
7.1 Maintenance Chart ...............................................................................................................29
7.2 LubricationFittingPoints ......................................................................................................30
7.3 Hydraulic System..................................................................................................................32
7.4 EngineOil .............................................................................................................................33
7.5 Engine Fuel System ..............................................................................................................34
7.6 EngineAir Cleaner................................................................................................................34
7.7 Battery ..................................................................................................................................35
7.8 Drive Belts ............................................................................................................................36
7.9 Cutter Blades ........................................................................................................................36
7.10 Tires ......................................................................................................................................37
7.11 Body, Deck and Upholstery ..................................................................................................37
Section 8 - Replacement Parts
STC48V, STC52VCutter Deck ............................................................................................... 38-39
Cutter Deck Controls................................................................................................................ 40-41
Sheet Metal Components.......................................................................................................... 42-43
STC Roll-Over Protection System ........................................................................................... 44-45
Drive System Components ....................................................................................................... 46-47
Engine and Attaching Parts - Kawasaki & Kohler .................................................................. 48-49
Engine and Attaching Parts - Honda ........................................................................................ 50-51
SteeringComponents ................................................................................................................ 52-53
Brake Components.................................................................................................................... 54-55
Fuel and Hydraulic System ....................................................................................................... 56-57
ElectricalSystem ....................................................................................................................... 58-59
Hydraulic Pump (BDP-10A) ..................................................................................................... 60-61
ReplacementDecals .................................................................................................................. 62-63
ElectricalSchematic ....................................................................................................................... 64
Warranty Statement............................................................................ Following Illustrated Parts List

1
Scag approved attachments and accessories:
GC-STC-V (p/n 9057)
GC-STC-CSV (p/n 9061)
Mulch Plate (p/n 9286, 9287)
Hurricane Mulch (p/n 9283, 9284)
STC Hitch (p/n 9241)
STC - Lights (p/n 9274)
Tiger Striper (p/n 9269)
GC-4D (p/n 9054)
GC-F4 (p/n 9055)
Soft Ride Seat (p/n 9291)
Suspension Seat (p/n/ 9292)
Blade Buddy (p/n 9212)
GENERAL INFORMATION
1.1 INTRODUCTION
Yourmower wasbuiltto thehigheststandards intheindustry.
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.
THEREPLACEMENTOFANYPARTONTHIS
PRODUCTBYOTHERTHANTHE
MANUFACTURER'SAUTHORIZED
REPLACEMENTPARTMAYADVERSELY
AFFECTTHEPERFORMANCE,DURABILITYOR
SAFETYOFTHISPRODUCT.
USEOFOTHERTHANORIGINALSCAG
REPLACEMENTPARTSWILLVOIDTHE
WARRANTY.
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 themachine
are referenced from the operator’s right and left when
seated in the normal operating position and facing the
forward travel direction.
1.3 SERVICINGTHE ENGINE AND DRIVE
TRAIN COMPONENTS
Thedetailservicingand repairof theengine,hydraulicpumps
and gearboxes are not covered in this manual; only routine
maintenance and general service instructions are provided.
Forserviceofthese 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
When ordering parts, always give the model and serial
number of your mower. The serial number plate is located
under the seat as shown in Figure 1-1.
Figure 1-1 Mower Serial Number Plate Location
Model
Serial
SCAG
Power Equipment
STC 2001 SPL-1
SERIAL NUMBER
PLATE LOCATION
WARNING:
USE ONLY SCAG APPROVED ATTACHMENTS
AND ACCESSORIES.
Attachments and accessories manufactured by companies
otherthanScagPowerEquipmentarenotapprovedforuse
on this machine.

2
CE Mark
TransmissionChoke
On/Start Spring Tension on Idler
Oil
Off/Stop
SYMBOL DESCRIPTION
SYMBOL DESCRIPTION
ISO Symbols
SpinningBlade
48071S
Parking Brake
WARNING
FALLING HAZARD
USE ONLY SCAG APPROVED
RIDING ATTACHMENTS
SEE OPERATOR'S MANUAL
481109
FallingHazard Thown Object Hazard

3
Slow
Fast
Cutting Element - Engage
Cutting Element - Basic symbol
Cutting Element - Disengage
Continuously Variable - Linear
Read Operator's Manual
Keep Bystanders Away
Pinch Point
481039S
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Hourmeter/Elapsed Operating Hours
Thown Object Hazard

4
SAFETY INFORMATION
2.1 INTRODUCTION
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 occuring 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 via the Internet at
www.scag.com. The manual for your 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.
2.2 SIGNAL WORDS
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.
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.
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.
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.
2.3 BEFORE OPERATION
CONSIDERATIONS
1. NEVER allow children to operate this riding mower.
Do not allow adults to operate this machine without
proper instructions.
2. DO NOT mow when children and/or others are
present. Keep children out of the mowing area and
in the watchful care of a responsible adult other than
the operator. Be alert and turn machine off if a child
enters the area.
3. DO NOT allow children to ride on or play on the
machine, it is not a toy.
4. Clear the area to be mowed of objects that could be
picked up and thrown by the cutter blades.
5. DONOT carry passengers.
6. DO NOT operate the machine under the influence of
alcohol or drugs.
WARNING:
Section 2

5
Section 2
9. Keep the machine and attachments in good 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.
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 postion and the parking brake
is not engaged. Never operate equipment with
the interlock system disconnected or
malfunctioning.
10. Be sure the interlock switches are functioning
correctly.
11. Fuel is flammable; handle it with care. Fill the fuel
tank outdoors. Never fill it indoors. Use a funnel or
spout to prevent spillage. Clean up any spillage
before starting the engine.
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 enclosed trailers.
13. Keep flammable objects (cigarettes, matches, etc.),
open flames and sparks away from the fuel tank and
fuel container. Use only approved containers.
14. Equipment must comply with the latest requirements
per SAE J137 and/orANSI/ASAE S279 when driven
on public roads.
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.
15. DONOT operate without the side discharge chute
installed and in the down position or with an optional
grass catcher or mulch plate completely installed.
16. Check the blade mounting bolts at frequent intervals
for proper tightness.
17. Make sure all hydraulic fluid connections are tight and
all hydraulic hoses and lines are in good condition
before starting the machine.
2.4 OPERATION CONSIDERATIONS
1. Know the function of all controls and how to stop
quickly.
DO NOT operate on steep slopes. To check a
slope, attempt to back up it (with the cutter deck
down). Ifthemachine can back uptheslope without
thewheels 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 material to them.
8. DONOT wear loose fitting clothing. Loose
clothing, 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
somelocal ordinances and insurance regulations.
Alwayswear hearing protection.Operating this
machine over prolonged periods of time can
cause loss of hearing.
7. If the operator(s) or mechanic(s) cannot read English
or Spanish, it is the owner's responsibility to explain
WARNING:
-NOTE-
WARNING:
WARNING:

6
Section 2
2.4 OPERATION CONSIDERATIONS
(CONT'D)
2. Reduce speed and exercise extreme caution on slopes
and in sharp turns to prevent tipping or loss of
control. Be especially cautious when changing
directions on slopes.
3. To prevent tipping or loss of control, start and stop
smoothly, avoid unnecessary turns andtravelatreduced
speed.
4. When using any attachment, never direct the discharge
of material toward bystanders or allow anyone near
the machine while in operation.
5. Before attempting to start the engine, with the operator
in the seat, disengage power to the cutter deck, place
the steering control levers in the neutral position and
engage the parking brake.
6. If the mower discharge ever plugs, shut off the engine,
remove the ignition key, and wait for all movement to
stop before removing the obstruction.
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.
7. Be alert for holes, rocks, roots and other hidden hazards
in the terrain. Keep away from any dropoff. Beware
ofoverheadobstructions(lowlimbs,etc.), underground
obstacles(sprinklers,pipes,treeroots,etc.). Cautiously
enter a new area. Be alert for hidden hazards.
8. Disengage power to cutter deck before backing up. 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.
9. DO NOT turn sharply. Use care when backing up.
10. Disengage power to cutter deck before crossing roads,
walks or gravel drives.
11. Mow only indaylight or good artificial light.
12. NEVERraise the deck with the blades engaged.
13. Take all possible precautions when leaving the machine
unattended, such as disengaging the mower, lowering
theattachments, setting the parking brake, stoppingthe
engine, and removing the key.
14. Disengagepower to theattachments when transporting
or when not in use.
15. The machine and attachments should be stopped and
inspected for damage after striking a foreign object,
and damage should be repaired before restarting and
operating the machine.
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.
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.
16. Keep hands and feet away from cutter blades and
moving parts. Contact can injure.
17. Use care when loading or unloading the machine onto
a trailer or truck.
18. Usecarewhenapproachingblindcorners,shrubs,trees,
or other objects that may obscure vision.
19.NEVERleave the machine running unattended.
WARNING:
CAUTION:

7
2.5 ROLL OVER PROTECTION SYSTEM
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.
Anyor all parts of the Roll-Over Protection System MUST
NOTbe removed. Failure to adhereto this guidelinecould
result in injury or death.
There is no roll-over protection when the roll bar is
in the down position.
Lower the roll bar only when absolutely
necessary.
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
upposition.
Operate the machine smoothly, no sudden turns,
starts or stops.
Raise the roll bar as soon as clearance permits.
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.
WARNING:
Section 2
Figure 2-1 Foldable Roll-Over Protection System
Figure 2-2 ROPS Hinge
TENSION
KNOB
HAIR PIN
LOCK PIN
UPRIGHT AND
LOCKED POSITION
TENSION
KNOBS
Lower the roll bar only when absolutely necessary.
1. To lower the roll bar, loosen the tension knob on both
the left hand and right hand bar. See Figure 2-1.
2. Remove the hairpin cotter pins and remove the (2) two
lock pins. See Figure 2-2.
3. Lower the roll bar to the down position.
4. To raise the roll bar, lift the bar to the upright position.
5. Install the (2) two lock pins through the hole, secure
with the (2) two hairpin cotter pins and tighten the
tension knobs. See Figure 2-2.

8
Section 2
Figure 2-3 Seat Belt Inspection
The potential exposure of the seat belt to severe
enviromental conditions make it crucial to inspect the seat
belt system regularly.
It is recommended that the seat belt be inspected on a daily
basis for signs of damage. Any seat belt system that shows
cuts, fraying, extreme or unusual wear, significant
discolorationdueto 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
replacedimmediately.
1. Check the full length of the seat belt webbing for cuts,
wear, fraying, dirt and stiffness. See Figure 2-3.
2. Check the seat belt webbing in areas exposed to ultra
violet rays from the sun or extreme dust or dirt. If the
originalcolorofthe webbing in these areas isextremely
faded and/or is packed with dirt, the physical strength
ofthiswebbing may have deteriorated. If this condition
exists, replace the seat belt system.
WARNING:
Failure to properly inspect and maintain the
seat belt can cause serious injury or loss of
life.
3. Check the buckle and latch for proper operation and
determine if the latch plate is excessively worn,
deformed, or if the buckle is damaged or cracked. See
Figure2-3.
WARNING:
INSPECT WEBBING
INSPECT BUCKLE
& LATCH
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.
ALWAYS travel up or down the slope whenever
possible. Never across the slope.
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.
DONOT permit untrained personnel to operate the
machine.

9
2.6 MAINTENANCE CONSIDERATIONS &
STORAGE
1. Never make adjustments to the machine with the
engine running unless specifically instructed to do so.
If the engine is running, keep hands, feet, and
clothing away from moving parts.
2. Disengage drives, lower implement, set parking
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.
3. Disconnect battery or remove spark plug wire before
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.
5. Do not change the engine governor settings or
overspeed the engine. See the engine operator's
manual for information on engine settings.
Section 2
11. Use jack stands to support components when
required.
12. Carefully release pressure from components with
stored energy.
13. Let the engine cool before storing.
14. DO NOT store the machine near an open flame.
15. Shut off fuel while storing or transporting.
16. DO NOT store fuel near flames or drain indoors.
17. Charge batteries in an open well ventilated area,
away from spark and flames. Unplug charger before
connecting or disconnecting from battery. Wear
protective clothing and use insulated tools.
6. To reduce fire hazard, keep the cutting units, drives
muffler and engine free of grass, leaves, excessive
grease, oil and dirt.
7. Park the machine on level ground and engage the
parking brake.
8. NEVER allow untrained personnel to service the
machine.
9. Use care when checking blades. Wrap the blade(s)
or wear gloves and use caution when servicing
blades. Only replace blades. NEVER straighten or
weld blades.
10. Keep all parts in good working condition. Replace all
worn or damaged decals.
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.
WARNING:

10
Section 2
2.7SAFETY AND INSTRUCTIONAL DECALS
483407
483402
481568
483397
483406
482709
2007 STC &STWC Safety Decals
483023
482291
483300
483411
483425

11
Section 3 SPECIFICATIONS
3.1 ENGINE
GeneralType .............................................................................. Heavy DutyIndustrial/Commercial Gasoline
Brand ......................................................................................... Kawasaki, Kohler
Horsepower ............................................................................... 19 HP (Spec.#FH580V) (Scag Model STC48V-19KAI)
23 HP (Spec.# PS-75607) (Scag Model STC48V-23CV)
23 HP (Spec.#FH680V-AS32) (Scag Model STC52V-23KA)
24HP(Spec.#GXV670TAF2) (ScagModelSTC52V-24HN)
Type 4 Cycle Gasoline, Twin Cylinder, Vertical Shaft
Cylinders.................................................................................... 2 with Cast Iron Sleeves
Governor .................................................................................... Mechanical Type with Variable Speed Control SetAt 3600 RPM
Idle Speed .................................................................................. 1550 RPM-Kawasaki
1900RPM- Kohler
1350 RPM - Honda
Kawasaki Fuel Pump Group ...................................................... Mechanical Fuel Pump with In-Line Fuel Filter, Fixed Jet
................................................................................................... Downdraft Carburetor.
Fuel ............................................................................................ Non-Leaded Gasoline with a Minimum Octane Rating of 87
OilPumpGroup .......................................................................... Positive DisplacementGerotor™ Oil Pump
Starter......................................................................................... Electric Starting with Solenoid Shift Starter
Belts: .......................................................................................... Kevlar cord. Self-adjusting, Self-tightening
PumpDriveBelt ......................................................................... Scag PartNumber- 483172
3.2 ELECTRICAL
Battery ....................................................................................... 12Volt
Charging System ........................................................................ Alternator
Charging Output ........................................................................ 12Volt, 13Amp- Kawasaki
12Volt, 15Amp -Kohler
System Polarity .......................................................................... Negative Ground
Starter......................................................................................... 12Volt Electric Ring GearType, Key and Solenoid Operated Interlock
Switches..................................................................................... Seat,NeutralControl, MowerEngagement (BBC), Parking Brake
Instrument Panel ........................................................................ Key Switch, Throttle Lever, Manual Choke,
PTO Switch, Fuses and Safety Start module
Fuses ......................................................................................... Two(2) 20Amp
3.3 TRACTOR
Drive System .............................................................................. Hydraulic Drive withTwo Variable Displacement Pumps and Two
Cast-iron High Torque Motors
Hydrostatic Pumps .................................................................... Two Hydro-Gear™ BDP10APumps with DumpValves for
movement without running the engine
Drive Wheel Motors .................................................................. Two Hydro-Gear™ Cast-Iron High Torque Motors
Steering/Travel Control.............................................................. Twin Lever Fingertip Steering Control with Individual Control to
Each Wheel with Gas Spring Dampers
ParkingBrake ............................................................................. LeverActuated Linkage to Brakes on Both Drive WheelAxles
Wheels:
(2) Front Caster...................................................................... 13 X 5.0-6 Flat free, w/tapered roller bearing pivots
(2) Drive- (48"-52"Deck) ...................................................... 23 X 9.50 X 12 Four-Ply Pneumatic Tubeless, Radius Edge
Fuel Tanks.................................................................................. Dual 4.5-Gallon Seamless Polyethylene Tanks with large opening and
Fuel Cap
Tire Pressure:
Front Caster ........................................................................... Flat Free
Drive ...................................................................................... 12PSI
Seat ............................................................................................ Padded, Thick Cushion with Extra Spring Support

12
Section 3
3.3TRACTOR (CONT'D)
Travel Speed:
Forward ................................................................................. 0-10MPH
Reverse.................................................................................. 0-5 MPH
3.4 CUTTER DECK
Type:.......................................................................................... Floating, Adjustable, Anti-scalping, Hybrid Design Combines
Out-front and Belly-mount Designs
Construction: ............................................................................. Tri-plate deck construction, top of deck consists of three steel
plates totaling nearly 1/2" of steel.,7-gauge (3/16") deck skirt.
True Cutting Width:................................................................... 48"(122.0cm),52"(132.0cm)
Cutting Height Adjustment:....................................................... Foot Operated Lever Adjustment from Operator's Seat, 1.00" to
5.5"in1/4"increments
CutterBlades:............................................................................. 197Thick,MilledEdge,WearResistantMarbain™
BladeEngagement: ................................................................... ElectricBladeEngagementClutchwithControlPanelSwitch
Connected to the Cutter Deck via through a Belt.
DischargeOpening: ................................................................... Extra Wide DischargeOpening withSpring LoadedDischarge
Chute and Turbo Baffle
Spindles: .................................................................................... Heavy-duty 1-1/8" Top Dimension Spindle Shaft, Cast Housing,
Taper Roller Bearing, Low Maintenance with Top Access Grease
FittingandGreaseOverfillReliefPoppet
SpindlePulleys:.......................................................................... Split Steel withEasilyRemovedTaperHubs
CutterDeckBelts: ...................................................................... B-section and Cogged Type with Kevlar Cord. Self-adjusting,
Self-tightening
Electric Clutch Type ................................................................... Ogura Heavy Duty PTO Clutch Brake
3.6 HYDRAULIC SYSTEM
HydraulicOilFilter ..................................................................... 10 Micron Spin-on Element Type
Hydraulic Reservoir ................................................................... Nylon; 2-1/2 Quart Capacity
3.7 PRODUCTIVITY
The following chart will aid you in determining how many acres your Scag mower will cut per day.
The chart is an estimate based on 8 hours per day cutting time at 6 MPH with a 20% allowance for overlap and turns.
CuttingWidth: 48" 52"
AcresPer Day: 18.6 20.2
-NOTE-
The machine will travel at 10 mph for
transport purposes. For best cutting
performance the forward travel speed
should be adjusted depending upon the
cutting conditions.

13
Section 4
OPERATING INSTRUCTIONS
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.
4.1 CONTROLS AND INSTRUMENT
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.
CAUTION:
1. Ignition Switch (Figure 4-1). Used to start the
engine and has three positions; OFF, ON, and
START.
2. Mower Deck Switch (Figure 4-1). 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.
3. Engine Choke Control (Figure 4-1). Used to
start a cold engine.
4. Engine Throttle Control (Figure 4-1). Used to
control the engine speed. Pushing the lever forward
increases engine speed. Pulling the lever back
decreases engine speed. Full backward position is
the IDLE position. Full forward is the cutting
position.
Figure 4-1 Controls and Instruments
DECK LIFT
FUEL SWITCHING
VALVE
LEFT STEERING
CONTROL
PARKING
BRAKE
CUTTING HEIGHT
ADJUSTMENT
IGNITION
SWITCH
MOWER
DECK
SWITCH
ENGINE THROTTLE CONTROL
ENGINE
CHOKE
CONTROL
STC 2007 CAI
POWER EQUIPMENT
CHOKE
OFF
OFF
ON
ON
START
START
FAS T
FAST
SLOW
SLOW
MOWER DECK
PUSH IN TO
DISENGAGE
PULL OUT
TO ENGAGE
HOUR METER
FUSES
CUTTER DECK
RELEASE LEVER
DUMP
VALVE
SEAT BELT
RIGHT STEERING
CONTROL
SEAT HOLD DOWN
RELEASE LATCH

14
Section 4
DUMP VALVE
CONTROL LEVERS
STC 2001 DVC
5. Hourmeter (Figure 4-1). Indicates the number of
hours the engine has been operated. It operates
whenever the ignition key switch is in the ON
position. 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.
6. Fuse Holders (Figure 4-1). Two 20-amp fuses
protect the mower’s electrical system. To replace
fuses, pull fuse out of the socket and install a new
fuse.
7. Left Steering Control (Figure 4-1). Used to
control the mower's left wheel when traveling
forward or reverse.
8. Right Steering Control (Figure 4-1). Used to
control the mower's right wheel when traveling
forward or reverse.
9. Parking Brake Control (Figure 4-1). 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.
10. Fuel Switching Valve (Figure 4-1). Located on
the left side of the machine. Used to shut off fuel
supply to the engine and change fuel supply between
the fuel tanks. Rotate the valve counter clockwise to
supply fuel from the tank on the left side only.
Rotate the valve clockwise to supply fuel from the
tank on the right side only.
11. Dump Valve Control Levers (Figure 4-2).
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 for proper operation of the
mower drive system. Rotating the levers counter-
clockwise, 1-2 turns, allows the mower to be moved
by hand (free-wheeling).
12. Deck Lift Foot Lever (Figure 4-1). Used to raise
and lower the cutter deck.
Figure 4-2 DumpValve Control
13. Cutting HeightAdjustment (Figure 4-1). Used to
set the cutter deck at the desired cutting height.
14. Cutter Deck Release Lever (Figure 4-1). Used to
lock the cutter deck in the transport position. Push
the foot pedal forward and pull back on the release
lever to release the cutter deck for normal mowing.
15. Seat Belt (Figure 4-1). Used to secure the
operator. Seat belt must be worn only when the roll
bar is in the upright and locked position.
16. Seat Hold Down Release Latch (Figure 4-1).
Located behind the seat. Used to secure the seat in
the operators position. Release the latch to gain access
under the seat.
4.2 SAFETY INTERLOCK SYSTEM
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/or the parking brake not
engaged.
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.
WARNING:

15
Section 4
4.3 INITIAL RUN-IN PROCEDURES (First
Day of Use or Approximately 20 Hours)
1. Check all belts for proper alignment and wear at 2, 4
and 8 hours.
2. Change the engine oil and oil filter after the first 20
hours of operation. (See Section 7.4.)
3. Check hydraulic oil level in reservoir. (See Section
7.3)
4. Check for loose hardware. Tighten as needed.
5. Check interlock system for proper operation. (See
Section 4.2)
6. Check tire pressure. Adjust pressure if necessary.
(See Section 7.10)
4.4 STARTINGTHE ENGINE
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.
1. Be sure the fuel shutoff valve, located behind the
operator's seat by the left fuel tank, is completely
open. (See Section 7.5)
2. Sit in the operator’s seat, fasten seat belt and place
the steering control levers in the neutral position.
3. Engage the parking brake.
4. If the engine is cold, choke the engine as needed.
5. Move the engine throttle control to about half engine
speed.
CAUTION:
6. 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.
7. Allow engine to warm before operating the mower.
4.5 GROUND TRAVEL AND STEERING
-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.
-IMPORTANT-
Start practicing with a slow engine speed and
slow forward travel. Learn to feather the
steering controls to obtain a smooth
operating action.
ForwardTravel
To travel forward with the mower, disengage the parking
brake, pull levers inward out of the neutral lock position
and slowly push the steering control levers forward an
equal distance. The further the steering control levers
are pushed forward the greater the forward speed will
be. To increase the speed, push the steering control
levers further forward and to decrease the speed, pull the
steering control levers back.
To stop the forward travel, pull the steering control levers
back to the neutral position.
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.

16
Section 4
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 may hang up on the curb. Raise the
deck and travel backwards over the curb at a
45 degree angle. (see section 4.1, item 12 for
cutter deck raising instructions)
Reverse Travel
Disengage power to the mower before backing up.
Donotmowin reverseunless absolutely necessary
and then only after observation of the entire area
behind the mower.
Before backing up, observe the rear for persons
and obstructions. Clear the area before backing
up.Possible injury or propertydamagecould occur.
To travel in reverse, pull levers inward out of the neutral
lock position and pull both handles back. Keep the travel
speed low while traveling in reverse.
-NOTE-
The mower may not travel straight in reverse.
Slight adjustments must 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, place the handles in the neutral lock position
and engage the parking brake.
4.6 ENGAGING THE DECK DRIVE (CUTTER
BLADES)
1. Set the throttle at about 3/4 speed. Do not attempt to
engage the deck drive at high speed as this shortens
the electric clutch life — use only moderate engine
speed when engaging the deck drive.
2. Engage the deck drive by pulling out on the yellow
switch, located on the instrument panel, (Figure 4-3)
to the engage position.
-NOTE-
A squealing noise may be heard when
engaging or disengaging the deck drive. It is
caused by the electric clutch plates meshing
as the mower comes up to speed. This is
normal.
CAUTION:
CAUTION:
Figure 4-3 Cutter Engage Switch
STT99CES
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE