Scag Power Equipment Magnum III User manual

OPERATOR'S MANUAL
PART 03027

FAILURE TO FOLLOW SAFE OPERATING PRACTICES
MAY RESULT IN SERIOUS INJURY.
* Keepallshieldsinplace,especially thegrassdischargechute.
* Beforeperforminganymaintenanceorservice, stop themachineand
remove the spark plug wire and ignition key.
* Ifa mechanism becomes clogged, stoptheengine before cleaning.
* Keephands, feet andclothingaway from power-drivenparts.
* Readthis manualcompletelyas well asother manuals thatcame
withyour mower.
* Keepothers off the tractor(onlyoneperson 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
Thismanual coversthe operatinginstructions
and illustrated partslist for:
All MAG Machines
with a serial number of 22060001- 22069999
Alwaysuse the entireserial number listedon the serialnumber
tagwhen referringtothis product.

1
GENERAL INFORMATION
1.1 INTRODUCTION
Your mower was built to highest standards in the industry.
However, the prolonged life and maximum efficiency of
your mower depend 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 and cutting deck. The serial plates
are located where shown in Figure 1-1.
Section 1
For pictorial clarity, some illustrations and Figures in this
manualmayshowshields,guardsorplatesopenorremoved.
Under no circumstances should your mower be operated
without these devices in place.
Allinformationis based upon product informationavailable
at 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”ofthe machine
arereferencedfrom the operator’s right andleftwhenseated
in the normal operating position and facing the
forward travel direction.
1.3 SERVICINGTHE ENGINE AND DRIVE
TRAIN COMPONENTS
Thedetailservicingandrepairoftheengine,hydraulicpump
and motors and gear boxes are not covered in this manual;
only routine maintenance and general service instructions
are provided. For service of these components during the
limitedwarranty period, itisimportant to contact yourScag
dealer or find a local authorized servicing agent of the
componentmanufacturer. Anyunauthorized work doneon
thesecomponentsduringthe warranty period may voidyour
warranty.
Figure 1-1 Serial Plate Locations
Tractor Serial Number
Plate Location
Cutter Deck
Serial Number
Plate Location

2
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.
Hazardcontrol and accidentpreventionare dependent upon
the awareness, concern, prudence, and proper training of
the personnel involved in the operation, transport,
maintenanceandstorageoftheequipment. Makesureevery
operator is properly trained and thoroughly familiar with
all 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
Equipment,Service Department atP.O. Box 152, Mayville,
WI 53050. There is 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 is Involved!" The symbol is used with the
following signal words to attract your attention to safety
messagesfoundonthedecalsandthroughoutthismanual.
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.
SignalWord:
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.
Section 2
The signal word “DANGER” denotes that an extremely
hazardoussituation exists onor near the machinethat could
result in high probability of death or irreparable injury if
proper precautions are not taken.
WARNING:
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.
CAUTION:
The signal word “CAUTION” is a reminder of safety
practicesonor near the machine thatcouldresultinpersonal
injury if proper precautions are not taken.
Your safety and the safety of others depend 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.
5. DO NOT wear loose fitting clothing that could get
caught 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.

3
Section 2
WARNING:
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
parking brake is applied and the blades are
disengaged. The system also shuts off the
engine if the operator removes his foot from
the interlock pedal with the mower running and
the parking brake not engaged. Never operate
equipment with the interlock system discon-
nected or malfunctioning.
WARNING:
6. Prolonged exposure to loud noise can cause hearing
impairment or loss. Operator hearing protection is
recommended, particularly for continuous operation of
the mower. Wear suitable hearing protection.
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.
8. Be sure interlock switches are functioning correctly
.
9. Fuel is flammable; handle with care.
10.Equipment must comply with the latest requirements
per ANSI J137 and/or ANSI S279 when driven on
public roads.
11.DO NOT operate without a chute deflector installed;
keep the deflector in lowest possible position.
12.Check the blade mounting bolts at frequent intervals
for proper tightness.
13.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.
ALWAYS FOLLOW OSHA APPROVED OPERATION.
3. Do not stop or start suddenly. WHEN GOING
UPHILL OR DOWN HILL, 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 nor allow anyone near
the machine while in operation.
5. Before attempting to start the engine, disengage power
to all attachments and engage the parking brake. DO
NOT depress the right foot pedal.
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.
7. Be alert for holes, rocks, and roots in the terrain and
other hidden hazards. Keep away from any drop off.
Beware of overhead obstructions (low limbs, etc.),
underground obstacles (sprinklers, pipes, tree roots,
etc.). Cautiously enter a new area. Be alert for hidden
hazards.
8. Disengage power to mower before backing up. Do not
mow in reverse unless absolutely necessary and then
only after observation of the entire area behind the
mower.

4
Section 2
9. DO NOT turn sharply. Use care when backing up.
10.Use counterweights or wheel weights when suggested
in this manual.
11.Watch for traffic when crossing roads or operating
near roadways
.
12.Mow only in daylight or good artificial light.
13.Take all possible precautions when leaving the ma-
chine unattended, such as disengaging the mower,
lowering the attachments, setting the parking brake,
stopping the engine, and removing the key.
14.Disengage power to the attachments when transport-
ing 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.
16.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.
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
overspeedthe engine.
5. To reduce fire hazard, keep the engine free of grass,
leaves, excessive grease and dirt.
6. Hydraulic fluid is under high pressure. Keep body
and hands away from pin holes or nozzles that eject
hydraulic fluid under high pressure. Use only card-
board or paper to search for leaks.
7. Hydraulic fluid under high pressure may have suffi-
cient 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
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
DANGER
SPINNING BLADE
KEEP CLEAR
CONTACT CAN INJURE
48071
2.6 SAFETY AND INSTRUCTIONAL DECALS

6
SPECIFICATIONS
Section 3
3.1 ENGINE
General Type ............................................................................. Heavy Duty Industrial/Commercial Diesel
Brand ......................................................................................... Kubota 28 HP Super 5 Series, Electric Start
Model ......................................................................................... D1105-B
Horsepower................................................................................ SAE Gross Intermittent, 28 HP @ 3000 RPM
Type ...........................................................................................Horizontal Shaft, Water Cooled, 4-Cycle Diesel
Displacement ............................................................................. 1123 cc.
Low Idle..................................................................................... 850 - 950 RPM
Cylinders ................................................................................... 3
Order of Firing ..........................................................................1-2-3
Direction of Rotation................................................................. Counter-clockwise (Viewed From Flywheel End)
Fuel Injection Pump .................................................................. Bosch MD Type, Mini Pump
Injection Pressure ...................................................................... 1,991 psi
Injection Timing (Before T.D.C.) ............................................. 19°
Compression Ratio .................................................................... 23:1
Starting System ......................................................................... Electric Starting with Cell Starter, Glow Plug In Combustion
Chamber
Fuel ............................................................................................ Diesel Fuel No. 2 -D (ASTM D975)
Oil Type ..................................................................................... API Sandard, CD Grade or Better
Oil Filter .................................................................................... Full Flow Oil Filter Cartridge
Oil Capacity............................................................................... 4 Quarts With Filter
Cooling Pressurized, Sealed Cooling System, 170° F Thermostat, Blade
Fan, Cooling Capacity 8 Quarts
Belts:
Alternator .............................................................................. See Engine Manual for Part Number
Fan......................................................................................... Scag Part Number - 481114
Electric Clutch ...................................................................... Scag Part Number - 481104
Hydraulic Pump .................................................................... Scag Part Number - 481103
3.2 ELECTRICAL
Battery ....................................................................................... 12 Volt
Charging System ....................................................................... Alternator
Charging Output ....................................................................... 12 Volt, 30 Amp
System Polarity.......................................................................... Negative Ground
Starter ........................................................................................ 12 Volt Electric Ring Gear Type, Key and Solenoid Operated
Interlock Switches ..................................................................... Left Foot Pedal, Blade Brake, and Parking Brake
Fuses .......................................................................................... Two (2) 30 Amp
3.3 TRACTOR
Drive Motors ............................................................................. 12 Cu. In. Cast Iron High Torque Motors
Steering......................................................................................Chain and Sprocket
Forward and Reverse Control ................................................... Pedal Operated Linkage Connected To The Hydraulic Pump
Parking Brake............................................................................ Lever Actuated Linkage to Drum Brakes on Both Drive Wheel
Assemblies
Wheels:
(2) Front Caster.................................................................... 12 x 3.5
(2) Drive ............................................................................... 2 x 10.5 -12, 4-ply Pneumatic Tubeless, Radius Edge
(1) Rear ................................................................................ 18 x 8.50 -8 NHS
Fuel Tank................................................................................... Seamless Polyethylene Tank; 8 Gallon Capacity
Tire Pressure:
Front Caster.......................................................................... 25 PSI
Drive..................................................................................... 15 PSI
Rear ...................................................................................... 15 PSI

7
Section 3
3.3 TRACTOR (CONT'D)
Seat ............................................................................................ Milsco Seat With Adjustment Lever For Forward and Back
Movement
Travel Speed:
Forward ................................................................................ 0 - 8 MPH Infinitely Variable
Reverse .................................................................................0 - 4.3 MPH Infinitely Variable
3.4 CUTTER DECK
No. of Blades ............................................................................. 3
Width of Cut:
Mag-61 ................................................................................. 61 in.
Mag-72 ................................................................................. 72 in.
Blade Size:
Mag-61 .................................................................................1/4 thick x 21" long, milled edge, 5150 alloy steel
Mag-72 .................................................................................1/4 thick x 24-1/2" long, milled edge, 5150 alloy steel
Blade Spindles........................................................................... Cast Iron with Easy Removable Taper Hubs
Deck Drive................................................................................. Belt Driven Electric Clutch Connected to Drive Shaft to
Gearbox on Deck
Electric Clutch Type................................................................. Warner “Mag Stop” Electric Clutch
Blade Brake ............................................................................... Lever Controlled Linkage to Band Type Brake. Brake Hub
Connected to Drive Shaft
Cutting Height........................................................................... Switch on Instrument Panel Controls Electric Actuator;
Cutting Heights - 1-1/2" to 5-1/2"
Deck Tilt .................................................................................... Switch on Instrument Panel Controls Electric Actuator
Cutter Deck Belts:
Blade and Gearbox Drive (Mag-61) .................................... Scag Part Number - 48204
Blade and Gearbox Drive (Mag-72) .................................... Scag Part Number - 48089
Blade Drive (Mag-61).......................................................... Scag Part Number - 48265
Blade Drive (Mag-72).......................................................... Scag Part Number - 481295
Gearbox Type............................................................................. Sealed Housing, Bevel Gear and Pinion Type
Drive Shaft ................................................................................ Quick-Disconnect Shaft With Two High Speed U-Joints
3.5 HYDRAULIC SYSTEM
Hydraulic Pump......................................................................... Sunstrand Series 15
Hydraulic Cooler ....................................................................... Part of Radiator
Hydraulic Oil Filter ................................................................... 10 Micron Spin-on Element Type
Hydraulic Reservoir................................................................... High Density Polyethylene; 13 Quart Capacity
3.6 WEIGHTS AND DIMENSIONS
Length:
Mag-61 ................................................................................. 120.0"
Mag-72 ................................................................................. 120.0"
Tracking Width:
Mag-61 ................................................................................. 54.0"
Mag-72 ................................................................................. 54.0"
Overall Width:
Mag-61 ................................................................................. 73.0"
Mag-72 ................................................................................. 84.0"
Overall Width (with Discharge Chute Up):
Mag-61 ................................................................................. 62.0"
Mag-72 ................................................................................. 73.0"
Overall Height ........................................................................... 51.0"
Operating Weight:
Mag-61 ................................................................................. 1,750 lb.
Mag-72 ................................................................................. 1,800 lb.

8
OPERATING INSTRUCTIONS
Do not attempt to drive this mower unless you
have read this manual. Learn the location and
purpose of all controls and instruments before
you operate this mower.
Do not hold the key in the START position longer than
15 seconds. If the engine does not start, return the key
to the OFF position for at least 60 seconds before a
restart attempt is made. Prolonged cranking can
damage the starter motor and shorten battery life.
Release the key when the engine starts and it will
automatically return to the run position. To stop the
engine, rotate the key counter-clockwise to the OFF
position.
2. Glow Plug Indicator Light: Yellow indicator turns
off when glow plugs have been properly energized
after the ignition switch is turned and held in the
PREHEAT position.
3. Hourmeter: Indicates the number of hours the engine
has been operated. It operates whenever the ignition
key is in the ON position. Can be used to keep track
of maintenance intervals and the amount of time
required to perform various tasks.
4. Voltmeter:Indicates the battery condition and charge
level.
4.1 CONTROLS AND INSTRUMENT
IDENTIFICATION
Before operating the mower, familiarize yourself with all
mowerandengine controls. Knowing the location, function
and operation of these controls is important for safe and
efficient operation of the mower.
A. Instrument Panel (See Figure 4-1)
1. Ignition Switch: The ignition switch is used to start
and stop the engine and has four positions; PREHEAT,
OFF, ON, and START. Rotate the key to the PRE-
HEAT position to energize the glow plug. Hold the
key at the PREHEAT position until the yellow indica-
tor light for the glow plug turns off, then release and
rotate the key to the START position.
CAUTION:
Section 4
Hourmeter
Temperature Gauge Fuel Gauge
Voltmeter
Fuse
Holders
Throttle
Lever
Glow Plug
Indicator
Light
Ignition
Switch
Mower
Deck Height
Switch
Mower
Deck Lift
Switch
Blade
Brake
Control
Lever
Engine
Oil Pressure
Switch
1
2
9
10
8
7
6564
Figure 4-1 Instrument Panel

9
5. TemperatureGauge: Indicates engine coolant
temperatures. Green zone indicates proper working
temperature. Red zone indicates engine over heating
and the engine should be shut off immediately.
6. Fuel Gauge: Indicates the amount of fuel in the fuel
tank.
7. Engine Oil Pressure Indicator Light: Indicator will
light if oil pressure drops below a safe operating
pressure. Stop the engine immediately; determine the
cause and correct the problem before continuing
operation.
8. Mower Deck Lift Switch: This switch raises and
lowers the deck for road travel, etc. Pushing the
switch forward tilts the mower deck back. Pulling the
switch back tilts the deck forward.
9. Mower Deck Height Switch: This switch raises and
lowers the cutting height of the mower deck. An
indicator is located above the deck that gives the
cutting height setting. Pushing the switch forward
raises the deck cutting height. Pulling the switch back
lowers the deck cutting height.
10.Fuse Holders: Two 30 amp fuses protect the
mower’s electrical system. To replace fuses, pull fuse
out of socket and install new fuse.
B. Levers
1. Blade Brake Control Lever (Figure 4-1): Used to
engage and disengage the mower blade brake. Pulling
the lever down and to the right engages the brake and
stops the blades from rotating. Pushing the lever up
and to the left disengages the brake, allowing blades to
rotate.
2. ThrottleLever (Figure4-1):Regulates engine speed.
Push the lever forward to increase or pull the lever
backwards to decrease the engine speed.
3. Parking Brake Lever (Figure 4-2): Used to engage
and disengage the parking brakes. Pull the lever
backwards to engage the parking brake. Push the
lever forward to disengage the parking brake.
Section 4
Figure 4-2
C. Foot Pedals
1. Forward/Reverse Foot Pedal (Figure 4-2): Used to
select the travel direction of the mower. Pressing the
pedal forward moves the mower in the forward
direction. Pressing the pedal backwards moves the
mower in the backward (reverse) direction.
2. Interlock Switch Pedal (Figure 4-3): Stops the
mower when operator's left foot in raised off the pedal.
Parking Brake
Lever
Forward/Reverse
Foot Pedal
INTERLOCK
PEDAL
Figure 4-3 Interlock Pedal

10
Left Foot Parking Mower Engine
Lifted From Brake Blade Operates
Interlock Brake
Pedal
Test Yes No On Off On Off Yes No
1 - X X X X
2 X X X X
3 - X X X X
4 X X X X
5 X X X X
4.2 SAFETY INTERLOCK SYSTEM
This mower is equipped with a safety system that prevents
the engine from starting unless the mower blade brake is
disengaged and parking brake is engaged. The system also
shuts the engine off if the operator's left foot is raised from
the interlock pedal with the mower and parking brakes
disengaged.
Never operate the mower with the interlock
system disconnected or malfunctioning. Do not
disconnect or bypass any switch; injury to
yourself and others or property damage could
result.
WARNING:
If the safety interlock system is malfunctioning or if you
want to ensure that it is working properly, perform the tests
in Table 4-1. Stop the test and have the system inspected
and repaired if:
• the engine does not start in test 1, or
• the engine does start during tests 2 and 3, or
• the engine continues to run during tests 4 and 5.
4.3 INITIAL RUN-IN PROCEDURES (First
Day of Use or Approximately 10 Hours)
1. Check all belts for proper tension at 2, 4 and 8 hours;
adjust as needed.
2. Check the neutral adjustment. If necessary, adjust the
linkage so that the mower does not move when forward
and reverse pedal is in neutral (See Adjustments in
Section 6).
3. Check the tires for proper inflation (See Section 7-2).
4. Check for loose hardware. Tighten as needed.
5. Perform Interlock Tests in Table 4-1.
6. Apply lubricant to all machine grease fittings. See
Lubrication Chart in Section 7.2.
Section 4
Table 4-1 Interlock System Tests

11
4.4 DIESEL ENGINE BREAK-IN
The proper break-in of a new diesel engine can make a
differenceintheperformanceandlifeof the engine. Perform
the following break-in procedure during the first 50 hours
of operation:
1. A new engine should be operated with as near full load
as possible. However, the engine must be allowed to
reach an operating temperature before operating at full
load conditions.
2. The engine oil should be checked twice daily. Higher
than normal oil consumption is not uncommon during
the initial break-in period.
3. Change the oil and filter element after the first 40
hours of operation.
4. Check all engine belts for proper tension after the first
10 hours of operation and adjust, if necessary. Refer
to Adjustments in Section 6.
5. During the break-in period, check and tighten all
engine hardware.
4.5 STARTING THE DIESEL ENGINE
4. Turn the ignition key switch to the PREHEAT position
until the indicator light for the glow plug glows bright
red. The colder the temperature, the longer it will take
to energize the glow plug. This step is not necessary
when starting a warm engine.
5. Turn the ignition key switch to 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 inhibit overheating the starter
motor. Prolonged cranking can damage the starter
motor and shorten battery life.
6. Allow engine to warm to operating temperature.
4.6 OPERATOR COMFORT ADJUSTMENTS
Two adjustments can be made to make your mowing job
comfortable. The steering handle can be adjusted up or
down and the seat can be adjusted forward or back.
A. Adjusting Steering Handle Height
1. Remove the hardware securing the handle to the
steering shaft. Two sets of holes are available to
adjust the handle height.
Figure 4-4 Steering Handle Adjustment
2. Move the handle to align with the other holes in the
steering shaft. Install the hardware and tighten.
Hardware
Second Bolt Hole
1. Be sure the fuel shut-off valve is completely open.
The valve is located in the fuel line between the fuel
tank and electric fuel pump (See Section 7).
2. Sit in the operator’s seat and depress the interlock foot
pedal with your left foot. Make sure the parking brake
and mower blade brake are engaged.
3. Set throttle lever to 3/4 throttle.
DO NOT USE STARTING FLUIDS. Use of starting
fluids in the air intake system may be potentially
explosive or cause “Runaway” engine condition
that could result in engine damage and/or
personal injury.
CAUTION:
Section 4

12
B. Seat Adjustment
1. Pull the handle on the left side of seat (Figure 4-5) and
move the seat either forward or back.
2. Release the handle to lock the position.
1. To travel forward, depress the right foot pedal at the
toe. (See Figure 4-6). The further the pedal is de-
pressed the faster the mower will travel forward.
Figure 4-7 Backward (Reverse) Operation- Depress
Heel End of Pedal
Figure 4-5 Seat Adjustment
4.7 ADJUSTING GROUND SPEED AND
DIRECTION
-NOTE-
If you are not familiar with the operation of
thehydrostatic drive,practiceturning and ma-
neuvering with the foot controls before engag-
ingthe blades. Learn theoperation in anopen
area away from buildings, fences, or obstruc-
tions. Learn the operation on a flat ground
before operating on slopes. Start maneuver-
ing with SLOW engine speed until you are fa-
miliarwithall operating characteristics. Prac-
tice maneuvering the mower until you can
make it go exactly where you intend.
-NOTE-
If the mower is driven on public roads, it must
complywith state andlocal ordinancesaswell
asSAE J137 and/or ASMES279requirements.
Contact your local authorities for regulations
and equipment requirements.
-NOTE-
The left operator foot pedal must be depressed
before operation.
Figure 4-6 Forward - DepressToe End of Pedal
-NOTE-
Before shifting from forward to reverse, or re-
verse to forward, come to complete stop then
shift the foot pedal to the desired direction.
2. To travel backwards (reverse), depress the right foot
pedal at the heel (See Figure 4-7). The further the
pedal is depressed the faster the mower will travel
backwards. Use slower traveling speed when traveling
backwards and observe the area behind you before
moving.
Section 4

13
3. Check that all systems function correctly.
4. When traveling, the throttle control can be adjusted to
increase or decrease travel speed.
5. Reduce speed when turning around trees, shrubs, etc.
3. Always operate the engine at full throttle to
properly maintain cutting speeds. If the engine
starts to lug down, reduce the forward speed to
allow the engine to operate at maximum RPM.
4.9 HILLSIDE OPERATION
To minimize the possibility of overturning, the
least dangerous method of operating on hills
and terraces is to travel vertically up and down
the slope, not horizontally along the slope.
Avoid any unnecessary turns and travel at
reduced speed.
1. The 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. Wet grass limits
traction and steering control.
2. To inhibit tipping or loss of control, do not start or
stop suddenly, avoid unnecessary turns and travel at a
reducedspeed.
3. Keep tires properly inflated.
4. Always travel up or down the slope, whenever pos-
sible; NEVER across the slope.
5. If the mower cannot climb the slope, the grade is too
steep for safe operation. Do not make another attempt
to climb the slope. Engage the blade brake to stop the
blades and back down slowly.
WARNING:
WARNING:
IMPORTANT:
Avoid high-speed turns on all surfaces. Tires
can slip on grass and can wear rapidly on
concrete and asphalt.
6. When going over curbs, first activate the mower deck
lift switch to fully raise the deck to clear the curb. Go
FORWARD over the curb.
4.8 ENGAGING THE MOWER
1. Set engine throttle about 1/2 speed. Do not attempt
to engage the blade at high engine speed as this
shortens the electric clutch life — use only moderate
engine speed when engaging the blades.
2. Engage the mower blades by moving the blade brake
lever down and to the right.
Section 4
-IMPORTANT-
Do not engage the mower blades when
transporting the mower across drives, loose
materials, etc.
A safety interlock switch (left foot pedal) will
cause the engine to stop if the blade brake
is disengaged, and the left foot pedal is not
depressed. The function of the switch
should be checked by the operator raising
his left foot and disengaging the blade
brake; the engine should stop. If the switch
is not working, it should be repaired or
replaced before operating the mower. Do
not disconnect the interlock safety switches
because they are for the operator’s protec-
tion.

14
Figure 4-8 Proper Operation on Slope
Figure 4-9 Improper Operation on Slope
4.10 STOPPING
1. Slow engine speed to idle.
2. Place the right foot pedal in the center (neutral)
position.
3. Engage the blade brake.
-IMPORTANT-
If at all possible, do not engage the mower
brakewithengine running at highspeed, since
premature wear of the electric clutch will oc-
cur. Lower speed to near idle then engage the
brake.
4.11 AFTER OPERATION
1. Park the mower on a flat and level surface and fully
lower the cutting deck to the ground. Stop the engine
and engage the parking and blade brakes. Remove the
key from the ignition switch.
-IMPORTANT-
If the radiator dirt screen is not removed and
cleaned after every use, the screen will be-
comeclogged with grass clippings,etc., block-
ing the air flow through the radiator. This
will cause a high engine operating tempera-
ture that may cause damage to the engine.
Section 4
CAUTION:
The blade brake stops the blades from rotating.
If the blades do not stop, contact your Scag
Dealer.
4. Engage the parking brake and turn ignition key to OFF.
Remove the key from the ignition switch when
leaving the mower unattended to inhibit children
and inexperienced operators from starting the
engine.
CAUTION:
2. Clean the radiator dirt screen. See Section 7 for
radiator dirt screen removal and cleaning instructions..
3. Wash the entire mower after each use. Do not use high
pressure spray or direct the spray onto electrical
components.

15
Figure 4-10 Dump Valve Handle
4.13 RECOMMENDATIONS FOR MOWING
1. Keep the mower deck and discharge chute clean.
2. Mow with sharp blades. A dull blade will tear grass,
resulting in poor lawn appearance and takes extra
power (slow mowing speed).
3. The discharge deflector must not be removed and must
be kept in the lowest position to deflect grass clippings
and thrown objects downward. Orient the side dis-
charge away from sidewalks or street to minimize
cleanup of clippings. When mowing close to obstacles,
orient the discharge away from obstacles to reduce the
chance of property damage by thrown objects.
4. Cut grass when it is dry and not too tall. Mow
frequently and do not cut grass too short (cut off 1/3
or less of existing grass for best appearance).
5. Operate the engine at or near full throttle for best
cutting. Mowing with a lower RPM causes the mower
to not cut clean and tear the grass. The engine is
designed to be operated at full speed.
6. Use slow travel speed for trimming purposes.
7. When mowing tall or wet grass, mow the grass twice.
Raise the mower to the highest setting for the first pass
and then make a second cutting pass to the desired
height.
8. Be sure the mower is leveled properly for a smooth
cut. See Section 7, Adjustments.
9. Use alternate stripe mowing pattern for best appear-
ance and vary the direction of the stripe each time the
grass is mowed to avoid wear patterns in the grass.
4.14 ADJUSTING CUTTING HEIGHT
The mower deck height switch on the instrument panel is
used to adjust the cutting height of the deck. Do not adjust
the cutting height while the mower is moving. Stop the
mower, then activate the deck height switch to position the
deck at the desired height. A gauge is located on the right
front of the mower (See Figure 4-11) for use in selecting
the proper cutting height.
-IMPORTANT-
Do not wash a hot or running engine. Use
compressed air to clean the engine and the
radiator fins. Cold water will damage the
engine and/or radiator.
4. Keep the entire mower clean to inhibit serious heat
damage to the engine or hydraulic oil circuit.
5. Recheck the cutter drive belts for proper tension,
alignment and any signs of rubbing. Correct and adjust
as necessary.
6. Fill the fuel tank with fresh, clean fuel at the end of
every day of operation.
7. Check the tire pressure. Inflate tires if necessary.
4.12 MOVING MOWER WITH THE ENGINE
STOPPED
To “free-wheel” or move the mower around without the
engine running, rotate the dump valve handle (screw and
nut) located on the side of the hydraulic pump to full open
position. See Figure 4-10. Disengage the parking brake
and move the mower by hand. The lever must be returned
to the original position to operate the mower.
Section 4
Dump Valve
Handle
Close
Open

16
Figure 4-11 Mower Cutting Height Gauge
4.15 TILTING THE MOWER DECK
1. Stop the traveling movement of the mower and engage
the blade brake.
2. Use the deck tilt control switch on the instrument panel
to raise the deck.
3. Before lowering the deck, observe that there are no
objects under the deck. Remove any objects then,
activate the deck tilt switch to lower the deck.
Do not tilt the deck with the mower blades
rotating. Engage the blade brake before tilting
the deck. Bodily injury or damage to the mower
or property could result.
CAUTION:
Section 4
1
2
3
4

17
Width of Deck
SGB018
CONDITION CAUSE CURE
Width of Deck
SGB020
Width
of
Deck
Width
of
Deck
SGB019
Streaking - Strips of Not enough overlapping Increase the overlap of each
Uncut Grass Between between rows pass
Cutting Paths
TROUBLESHOOTING CUTTING CONDITIONS
Stringers - Occasional Low engine RPM Run engine at full 3600 RPM
Blades of Uncut
Grass Ground speed too fast Slow speed to adjust for conditions
Wet grass Cut grass after it has dried out
Dull blades, incorrect sharpening Sharpen blades
Deck plugged, grass accumulation Clean underside of deck
Belts slipping Adjust belt tensions
Streaking - Strips of Dull, worn blades Sharpen blades
Uncut Grass in Cutting
Path Incorrect blade sharpening Sharpen blades
Low engine RPM Run engine at full 3600 RPM
Belt slipping Adjust belt tension
Deck plugged, grass accumulation Clean underside of deck
Ground speed too fast Slow speed to adjust for conditions
Wet grass Cut grass after it has dried out
Bent blades Replace blades
Section 5

18
CONDITION
TROUBLESHOOTING
CAUSE CURE
Sloping Ridge Across Tire pressures not equal Check and adjust tire pressure
Width of Cutting Path Wheels uneven Check and adjust tire pressure
Deck mounted incorrectly See your authorized SCAG dealer
Uneven Cut on Flat Lift worn off of blade Replace blade
Ground - Wavy
High-Low Blade upside down Mount with cutting edge toward
Appearance, ground
Scalloped Cut, or
Rough Contour Deck plugged,grass accumulation Clean underside of deck
Too much blade angle (deck pitch) Adjust pitch and level
Deck mounted improperly See your authorized SCAG dealer
Bent spindle area See your authorized SCAG dealer
Dull blade Sharpen blade
Uneven Cut on Uneven ground May need to reduce ground speed,
Uneven Ground - raise cutting height, and/or change
Wavy Appearance, direction of cut
High-Low Scalloped
Cut, or Rough Contour
Width of Deck
SGB020
Width of Deck
SGB021
Width of Deck
SGB023
Section 5