Scag Power Equipment MAG User manual

FROM SERIAL NUMBER 70001 TO 79999
OPERATOR'S MANUAL
PART 03034
MAGNUM III
MODEL MAG

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.
* ead this manual completely as well as other manuals that came
with your mower.
* Keep others off the tractor (only one person at a time).
REMEMBER - YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR!
Hazard control and accident prevention are dependent upon the awareness,
concern, prudence, and proper training of the personnel involved in the
operation, transport, maintenance, and storage of the equipment.
WARNING
This manual covers the operating instructions
and illustrated parts list for:
All MAG Machines
with a se ial numbe of 27870001- 27879999
Always use the entire serial number listed on the serial number
tag when referring to this 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 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 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
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 time of approval for printing. Scag Power quipment
reserves the right to make changes at any time
without notice and without incurring any obligation.
1.2 DIRECTION REFERENCE
The Right and Left, Front and Rear of the machine
are referenced from the operators right and left when seated
in the normal operating position and facing the
forward travel direction.
1.3 SERVICING THE ENGINE AND DRIVE
TRAIN COMPONENTS
The detail servicing and repair of the engine, hydraulic pump
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
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.
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.
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 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 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! Be ome 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 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.
Section 2
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 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
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 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. quipment 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
overspeed the engine.
5. To reduce fire hazard, keep the engine free of grass,
leaves, excessive grease and dirt.
6. Hydrauli 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 uper 5 eries, Electric tart
Model ......................................................................................... D1105-B
Horsepower ................................................................................ AE Gross Intermittent, 28 HP @ 3000 RPM
Type ........................................................................................... Horizontal haft, 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
tarting ystem ......................................................................... Electric tarting with Cell tarter, Glow Plug In Combustion
Chamber
Fuel ............................................................................................ Diesel Fuel No. 2 -D (A TM D975)
Oil Type ..................................................................................... API andard, CD Grade or Better
Oil Filter .................................................................................... Full Flow Oil Filter Cartridge
Oil Capacity ............................................................................... 4 Quarts With Filter
Cooling Pressurized, ealed Cooling ystem, 170° F Thermostat, Blade
Fan, Cooling Capacity 8 Quarts
Belts:
Alternator .............................................................................. ee Engine Manual for Part Number
Fan ......................................................................................... cag Part Number - 481114
Electric Clutch ...................................................................... cag Part Number - 481104
Hydraulic Pump .................................................................... cag Part Number - 481103
3.2 ELECTRICAL
Battery ....................................................................................... 12 Volt
Charging ystem ....................................................................... Alternator
Charging Output ....................................................................... 12 Volt, 30 Amp
ystem Polarity .......................................................................... Negative Ground
tarter ........................................................................................ 12 Volt Electric Ring Gear Type, Key and olenoid Operated
Interlock witches ..................................................................... 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
teering ...................................................................................... Chain and procket
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 NH
Fuel Tank ................................................................................... eamless Polyethylene Tank; 8 Gallon Capacity
Tire Pressure:
Front Caster .......................................................................... 25 P I
Drive ..................................................................................... 15 P I
Rear ...................................................................................... 15 P I

7
Section 3
3.3 TRACTOR (CONT'D)
eat ............................................................................................ Milsco eat With Adjustment Lever For Forward and Back
Movement
Travel peed:
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 ize:
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 pindles ........................................................................... Cast Iron with Easy Removable Taper Hubs
Deck Drive................................................................................. Belt Driven Electric Clutch Connected to Drive haft to
Gearbox on Deck
Electric Clutch Type ................................................................. Warner Mag top Electric Clutch
Blade Brake ............................................................................... Lever Controlled Linkage to Band Type Brake. Brake Hub
Connected to Drive haft
Cutting Height ........................................................................... witch on Instrument Panel Controls Electric Actuator;
Cutting Heights - 1-1/2" to 5-1/2"
Deck Tilt .................................................................................... witch on Instrument Panel Controls Electric Actuator
Cutter Deck Belts:
Blade and Gearbox Drive (Mag-61) .................................... cag Part Number - 48204
Blade and Gearbox Drive (Mag-72) .................................... cag Part Number - 48089
Blade Drive (Mag-61) .......................................................... cag Part Number - 48265
Blade Drive (Mag-72) .......................................................... cag Part Number - 481295
Gearbox Type ............................................................................. ealed Housing, Bevel Gear and Pinion Type
Drive haft ................................................................................ Quick-Disconnect haft With Two High peed U-Joints
3.5 HYDRAULIC SYSTEM
Hydraulic Pump ......................................................................... unstrand eries 15
Hydraulic Cooler ....................................................................... Part of Radiator
Hydraulic Oil Filter ................................................................... 10 Micron pin-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 Indi ator Light: Yellow indicator turns
off when glow plugs have been properly energized
after the ignition switch is turned and held in the
PR H AT 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
mower and engine 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 Swit h: The ignition switch is used to start
and stop the engine and has four positions; PR H AT,
OFF, ON, and START. Rotate the key to the PR -
H AT position to energize the glow plug. Hold the
key at the PR H AT 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