Scag Power Equipment SCAG SCR User manual

MODEL SCR
THIS MANUAL CONTAINS 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 THAT THIS
BOOK COVERS ARE CONTAINED ON THE
INSIDE COVER. BEFORE OPERATING YOUR
MACHINE, PLEASE READ ALL THE INFOR-
MATION ENCLOSED.
PART NUMBER 03080
OPERATOR’S MANUAL

FAILURE TO FOLLOW SAFE OPERATING PRACTICES
MAY RESULT IN SERIOUS INJURY.
* 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)
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:
SCR48-25CH with a erial number of 5590001 to 5599999
Always use the entire serial number listed on the serial number tag when referring to
this product.
WARNING:

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 Drive Train Components.............................................................. 1
Section 2 - Safety Information
2.1 Introduction ........................................................................................................................... 2
2.2 Signal Words.......................................................................................................................... 2
2.3 Before Operation Considerations .......................................................................................... 2
2.4 Operation Considerations ...................................................................................................... 3
2.5 Maintenance Considerations ................................................................................................. 4
2.6 Safety and Instructional Decals ............................................................................................. 5
Section 3 - Specifications .............................................. 6-7
Section 4 - Operating Instructions
4.1 Controls and Instrument Identification.................................................................................. 8
4.2 Safety Interlock System......................................................................................................... 9
4.3 Initial Run-In Procedures......................................................................................................10
4.4 Starting the Engine ................................................................................................................10
4.5 Ground Travel and Steering ..................................................................................................10
4.6 Engaging the Deck Drive .....................................................................................................12
4.7 HillsideOperation .................................................................................................................12
4-8 Parking the Mower ...............................................................................................................13
4.9 After Operation ....................................................................................................................13
4.10 Hopper, Mulch or Side Discharge Operation........................................................................13
4.11 Removing Clogged Material .................................................................................................15
4.12 Moving Mower with Engine Stopped ...................................................................................16
4.13 Recommendations for Mowing.............................................................................................16
4.14 AdjustingCutting Height .......................................................................................................16
4.15 Tilting the Cutter Deck..........................................................................................................17
Section 5 - Troubleshooting Cutting Conditions................................................................18-20

II
TABLE OF CONTENTS (CONT'D)
SUBJECT PAGE
Section 6 - Adjustments
6.1 Parking Brake Adjustment....................................................................................................21
6.2 Travel Adjustments ...............................................................................................................22
6.3 Throttle Control and Choke Adjustments ..............................................................................25
6.4 BeltAdjustment ....................................................................................................................25
6.5 BeltAlignment ......................................................................................................................25
6.6 Cutter Deck Adjustments .....................................................................................................25
Section 7 - Maintenance
7.1 Maintenance Chart ...............................................................................................................26
7.2 LubricationFitting Points ......................................................................................................27
7.3 Hydraulic System ..................................................................................................................29
7.4 EngineOil .............................................................................................................................29
7.5 Engine Fuel System ..............................................................................................................30
7.6 Engine Air Cleaner................................................................................................................31
7.7 Battery ..................................................................................................................................31
7.8 Drive Belts ............................................................................................................................33
7.9 Cutter Blades ........................................................................................................................33
7.10 Tires ......................................................................................................................................34
7.11 Hopper ..................................................................................................................................34
7.12 Cutter Deck Gearbox ...........................................................................................................34
7.13 Power Unit Gearbox .............................................................................................................35
7.14 Body, Deck, Hopper and Upholstery ....................................................................................36
Section 8 - Replacement Parts
Cutter Deck .............................................................................................................................. 38-39
Cutter Deck Support Components............................................................................................ 40-41
Sheet Metal............................................................................................................................... 42-43
Blower Assembly ..................................................................................................................... 44-45
Engine and Attaching Parts ...................................................................................................... 46-47
Traction Drive Components ...................................................................................................... 48-49
Hydraulic Pump ........................................................................................................................ 50-51
Cutter Deck Gearbox ............................................................................................................... 52-53
Speed and Steering Controls..................................................................................................... 54-55
Parking Brake Mechanism ....................................................................................................... 56-57
Fuel and Hydraulic Components............................................................................................... 58-59
Electrical System ...................................................................................................................... 60-61
Hopper ...................................................................................................................................... 62-63
Hopper Actuator Mechanism ................................................................................................... 64-65
Replacement Decals................................................................................................................. 66-67
Electrical Schematic .......................................................................................................................68

1
SCR 2K SPL
Serial Plate
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 quipment 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 i ba ed upon product information
available at the time of approval for printing. Scag
Power Equipment re erve the right to make change
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 1-1 Tractor Serial Number Plate Location

2
SAFETY INFORMATION
CAUTION:
WARNING:
Section 2
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.
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
quipment, Service Department at P.O. Box 152, Mayville,
WI 53050. There is a nominal charge of $2.00 for each
manual. Please indicate the complete model and serial
number of your Scag product.
2.2 SIGNAL WORDS
This symbol means Attention! Become Alert! Your
Safety i Involved!" The symbol is used with the following
signal words to attract your attention to safety messages
found on the decals 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 on safety decals and throughout
this manual that alerts the viewer to the existence and
relative degree of the hazard.
The signal word DANG R 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.
The signal word WARNING denotes a hazard exists on
or near the machine that can result in injury or death if
proper precautions are not taken.
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.
3. Clear the area to be mowed of objects that could be
picked up and thrown by the cutter blades.
4. DO NOT carry passengers.

3
Section 2
WARNING:
-NOTE-
WARNING:
12. quipment must comply with the latest requirements
per ANSI J137 and/or ANSI 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 A SI / ASAE S279 requirements.
Contact your local authorities for regulations and
equipment requirements.
13. DO NOT operate without a chute deflector installed;
keep the deflector in lowest possible position.
14. Check the blade mounting bolts at frequent intervals
for proper tightness.
15. 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.
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.
DO NOT operate on steep slopes. To check a slope,
attempt to drive up it (with cutter deck down). If
machine can drive up the slope without the wheels
slipping, reduce speed and use extreme caution.
ALWAYSFOLLOW OSHAAPPROVEDOPERATION.
3. Do not stop or start suddenly. WHEN MOWING A
HILLSIDE, MOW UP AND DOWN THE FACE
OF SLOPES, NEVER ACROSS THE FACE.
4. When using any attachment, never direct the discharge
of material toward bystanders or allow anyone near
the machine while in operation.
5. DO NOT wear loose fitting clothing that could get
tangled in moving parts. Do not operate the machine
wearing shorts; always wear adequate protective
clothing including long pants. Wearing safety glasses,
safety shoes and a helmet is advisable and is required
by some local ordinances and insurance regulations.
6. Operator hearing protection is recommended,
particularly for continuous operation of the mower.
Wear suitable hearing protection. Prolonged exposure
to loud noise can cause hearing impairment or loss.
7. 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 operator is seated
in the seat, the deck drive is disengaged, and the
speed control is placed in the neutral position with
the parking brake applied. The system also shuts
off the engine if the operator leaves the seat with
the mower running and the speed control is not in
the neutral postion with the parking brake applied.
It will also shut off the engine if the hopper is raised
with the cutter deck drive engaged. Never operate
equipment with the interlock system disconnected
or malfunctioning.
8. Be sure interlock switches are functioning correctly.
9. Fuel is flammable; handle with care. Fill fuel tank
outdoors. Never fill indoors. Use a funnel or spout to
inhibit spillage. Clean up any spillage before starting
the engine.
10. DO NOT add fuel to a running or hot engine. An
explosion could occur. Allow engine to cool for several
minutes before adding fuel.
11. Keep flammable objects (cigarettes, matches, etc.),
open flames and sparks away from the fuel tank and
fuel container.

4
Section 2
5. Before attempting to start the engine, with the
operator in the seat, disengage power to the cutter
deck, place the hopper in the stowed position,
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.
7. Be alert for holes, rocks, and roots in the terrain and
other hidden hazards. Keep away from any dropoff.
Beware of overhead obstructions such as low limbs,
etc. and underground obstacles such as sprinklers,
pipes, tree roots, 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.
9. DO NOT turn sharply. Use care when backing up.
10. Disengage power to cutter deck before crossing
roads, walks or gravel drives. Watch for traffic when
crossing roads or operating near roadways.
11. Mow only in daylight or good artificial light.
12. Take all possible precautions when leaving the
machine unattended, such as disengaging the mower,
lowering the attachments, setting the parking brake,
stopping the engine, and removing the key.
13. Disengage power to the attachments when
transporting or when not in use.
14. 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.
15. 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.
16. DO NOT run engine inside a building or confined
area without proper ventilation. xhaust fumes are
hazardous and could cause death.
2.5 MAINTENANCE CONSIDERATIONS
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. Remove the key from the ignition switch to prevent
accidental starting of the engine when servicing or
adjusting the machine.
3. 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.
4. Do not change the engine governor settings or
overspeed the engine. See the engine operator's
manual for information on engine settings.
5. To reduce fire hazard, keep the engine free of grass,
leaves, excessive grease and dirt.
6. Hydraulic fluid i under high pre ure. Keep
body and hands away from pinholes or nozzles that
eject hydraulic fluid under high pressure. Use only
cardboard or paper to search for leaks. If you need
service on your hydraulic system, please see your
authorized Scag dealer.
7. Hydraulic fluid under high pressure may have
sufficient force to penetrate skin and cause serious
injury. If hydraulic fluid is injected into the skin, it
must be surgically removed within a few hours by a
doctor or gangrene may result.

5
Section 2
2.6 SAFETY AND INSTRUCTIONAL DECALS
DANGER
SPINNING BLADE
KEEP CLEAR
CONTACT CAN INJURE
48071
WARNING
INSTALL BELT COVER BEFORE
OPERATING MACHINE
READ OPERATOR'S MANUAL 481039
ROTATING BLADES AND BELTS
WARNING
KEEP HANDS, FEET & CLOTHING CLEAR
KEEP ALL GUARDS IN PLACE
SHUT OFF ENGINE & DISENGAGE BLADE
CLUTCH BEFORE SERVICING
CLEAR AREA OF DEBRIS BEFORE MOWING
USE CAUTION IN DIRECTING DISCHARGE
KEEP BYSTANDERS, CHILDREN & PETS AWAY
READ INSTRUCTION MANUAL BEFORE OPERATING
DO NOT OPERATE WITHOUT DISCHARGE CHUTE, MULCHING
KIT, OR ENTIRE GRASS CATCHER INSTALLED
481040
CAUTION
AVOID INJURY FROM
BURNS. SHUT OFF
ENGINE BEFORE
REMOVING FUEL
TANK CAP.
481272
CAUTION
BEFORE OPERATING
READ OPERATINGS
MANUAL AND SAFETY
INSTRUCTIONS
CAUTION
KEEP BYSTANDERS AWAY

6
Section 3
3.1 ENGINE
General Type .............................................................................. Heavy Duty Industrial/Commercial Gasoline
Brand ......................................................................................... Kohler
Model ......................................................................................... Command
Horsepower ................................................................................ 2 HP at 3600 RPM (Scag Model SCR48-2 CH)
Type ........................................................................................... 4 Cycle Gasoline, Twin Cylinder, Horizontal Shaft
Displacement ............................................................................. 72 cc.
Cylinders.................................................................................... 2 with Cast Iron Sleeves
Governor .................................................................................... Mechanical Type with Variable Speed Control Set At 3600 RPM
Idle Speed .................................................................................. 1400 RPM
Fuel Pump Group ...................................................................... Mechanical Fuel Pump with In-Line Fuel Filter, Fixed Jet
Carburetor with Smart-Choke and Fuel Shutdown Solenoid
Fuel ............................................................................................ Non-Leaded Gasoline with a Minimum Octane Rating of 87
Oil Pump Group: ....................................................................... Positive Displacement Gerotor Oil Pump with Remote Oil Filter
Starter ........................................................................................ Electric Starting with Cell Starter
Belts:
Engine Belt ............................................................................. Scag Part Number - 481976
Blower Drive Belt .................................................................... Scag Part Number - 481977
Pump Drive Belt ...................................................................... Scag Part Number - 481978
3.2 ELECTRICAL
Battery ....................................................................................... 12 Volt
Charging System ........................................................................ Alternator
Charging Output ........................................................................ 12 Volt, 1 Amp
System Polarity .......................................................................... Negative Ground
Starter ......................................................................................... 12 Volt Electric Solenoid Shift Type
Interlock Switches ...................................................................... Seat, Neutral Control, Mower Engagement (BBC), Hopper and
Parking Brake
Instrument Panel ........................................................................ Ammeter, Hourmeter, Key Switch, Throttle Lever, Manual Choke,
BBC Switch, and Fuses
Fuses ......................................................................................... Two (2) 20 Amp
3.3TRACTOR
Drive System .............................................................................. Hydraulic Drive with Two Variable Displacement Pumps and Two
Cast-iron High Torque Motors
Hydrostatic Pumps .................................................................... Two Hydro-Gear ä BDP 10L Pumps with Dump Valves for
movement without running the engine
Drive Wheel Motors .................................................................. Two Ross Model MB 1 cu. inch Cast-iron High Torque Motors
Steering/Travel Control .............................................................. Twin Lever Fingertip Steering Control with Individual Control to
Each Wheel
Parking Brake ............................................................................ Lever Actuated Linkage to Brakes on Both Drive Wheel Axles
Wheels:
(2) Front Caster ...................................................................... 11 x 4.0- Smooth Tires
(2) Drive ................................................................................. 23 x 9. -12 Four-Ply Pneumatic Tubeless, Radius Edge
(1) Rear .................................................................................
Fuel Tank ................................................................................... Two, 3.7 gallon Polyethylene Tanks with Large Fuel Tank filler
neck and Fuel Gauge Fill Caps
Tire Pressure:
Front Caster .......................................................................... 2 PSI
Drive ..................................................................................... 12 PSI
Rear ....................................................................................... 2 PSI
Seat ............................................................................................ Padded
SPECIFICATIONS