THIS MANUAL CONTAINS THE OPERATING
INSTRUCTIONS AND SAFETY INFORMATION FOR YOUR SCAG MOWER. READING
THIS MANUAL CAN PROVIDE YOU WITH
ASSISTANCE IN MAINTENANCE AND ADJUSTMENT PROCEDURES TO KEEP YOUR
MOWER PERFORMING TO MAXIMUM EFFICIENCY. THE SPECIFIC MODELS THA T THIS
BOOK COVERS ARE CONTAINED ON THE
INSIDE COVER. BEFORE OPERA TING YOUR
MACHINE, PLEASE READ ALL THE INFORMATION ENCLOSED.
PART NUMBER 03099
WARNING:
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 pre vention 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:
SW32-13KAwith a serial number of 7300001 to 7309999
SW36A-13KAwith a serial number of 7310001 to 7319999
SW36A-13KHwith a serial number of 7320001 to 7329999
SW36A-15KAwith a serial number of 7330001 to 7339999
SW48A-15KAwith a serial number of 7340001 to 7349999
SW48A-17KAwith a serial number of 7350001 to 7359999
SW52A-17KAwith a serial number of 7360001 to 7369999
Always use the entire serial number listed on the serial number
tag when referring to this product.
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.
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.
A replacement Operator's Manual is available from your
Scag Servicing Dealer or by contacting Scag Power
Equipment, Service Department at P.O. Box 152,
Mayville, WI 53050. Please indicate the complete
model and serial number of your Scag product.
USE OF OTHER THAN ORIGINAL SCAG
REPLACEMENT PARTS WILL VOID THE
WARRANTY.
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 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 “Right” and “Left”, “Front” and “Rear” of the
machine are referenced from the operator’s perspective when in the normal operating position and facing
the forward travel direction.
GENERAL SAFETY INSTRUCTIONS
READ THIS OPERATOR'S MANUAL and
instructions furnished with attachments.
Perform only those maintenance procedures described
in this manual. If major repairs are ever needed or
assistance is desired, contact an Authorized Scag
Dealer. To ensure optimum performance and safety,
always purchase genuine SCAG replacement parts
and accessories.
Your safety and the safety of others depends
significantly upon your knowledge and understanding
of all correct operating practices and procedures of
this machine.
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.
WARNING:
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.
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.
1
ISO Symbols
CE Mark
SYMBOLDESCRIPTION
Parking Brake
On/Start
SYMBOLDESCRIPTION
TransmissionChoke
Spinning Blade
48071S
Spring T ension on Idler
Off/Stop
Oil
WARNING
Falling Hazard
FALLING HAZARD
USE ONLY SCAG APPROVED
RIDING ATTACHMENTS
SEE OPERATOR'S MANUAL
481109
2
SYMBOLDESCRIPTIONSYMBOLDESCRIPTION
SlowFast
481039S
Continuously variable - Linear
Pinch Point
Hourmeter/elapsed operating hours
Cutting element - Basic symbol
Cutting element - Engage
Cutting element - Disengage
Keep bystanders away
Read operator's manual
3
BEFORE OPERATING
1. Know the controls and how to stop quickly.
2. Do not allow children to operate the machine. Do
not allow adults to operate the machine without
proper instruction.
3. If the operator(s) or mechanic(s) can not read
English it is the owner's responsibility to explain this
material to them.
4. Remove all debris or other objects that might be
picked up and thrown by the cutter blades. Keep all
bystanders away from the mowing area.
5. Keep all shields, safety devices, and decals in place.
If a shield, safety device or decal is defective or
damaged, repair or replace it before operating.
Also, check all nuts, bolts and screws for proper
tightness, to assure the machine is in safe operating
condition.
6. Do not operate the machine while wearing sandals,
tennis shoes, sneakers or shorts. Also, do not wear
loose fitting clothing which could get caught in
moving parts. Always wear long pants and substantial shoes. Wearing safety glasses and safety shoes
is advisable and required by some local ordinances
and insurance regulations.
9. Before attempting to start the engine, shift the
transmission into neutral, move the blade engagement switch to the OFF position, and move the
neutral latches to neutral.
WHILE OPERATING
1. Do not operate the machine under the influence of
alcohol or drugs.
2. Start the engine when the neutral latches are in the
neutral lock position, the cutter blades are disengaged, and the transmission is in neutral.
3. Do not run the engine in a confined area without
adequate ventilation. Exhaust fumes are hazardous
and could possibly be deadly.
4. Using the machine demands attention. To
prevent loss of control:
A. Mow only in daylight or when there is good
artificial light.
B. Watch for holes or other hidden hazards.
C. Do not drive close to a drop-off, ditch, creek
bank, or other hazard.
D. Reduce speed when making sharp turns and
when turning on hillsides.
E. Always be sure of your footing. Keep a firm
hold on the handles and walk---never run.
F. Do not operate where conditions are slippery.
7. The owner/user can prevent and is responsible for
accidents or injuries occuring to themselves, other
people or property.
8. Fill the fuel tank with clean, fresh gasoline, with a
minimum octane rating of 87. Avoid spilling gasoline. Gasoline is highly flammable, handle it carefully.
A. Use an approved gasoline container.
B. Do not fill the tank while the engine is hot or
running.
C. Do not smoke while handling gasoline.
D. Fill the fuel tank outdoors and up to approxi-
mately 1" (25 mm) below the bottom of the filler
neck.
E. Wipe up any spilled gasoline.
5. The discharge chute must always be installed and in
the down position on the side discharge cutter deck
except when the Scag optional grass catcher or
mulching plate are properly installed. If the discharge area should plug, shut the engine off and wait
for all movement to stop before removing the
obstruction.
6. Disengage the blades and wait for them to stop
before crossing gravel drives, walks or roads.
7. Shut the engine off and wait until the blades come to
a complete stop before removing the grass catcher
container.
8. Never raise the cutter deck while the blades are
rotating.
4
9. Always park the mower and/or start the engine on a
level surface.
10. If the cutting blades should strike a solid object or
the equipment should start to vibrate abnormally,
stop the engine, disconnect the spark plug wire, and
check immediately for the cause. Vibration is
generally a warning of trouble. Check the machine
for damaged or defective parts. Repair any damage
before starting the engine or operating the cutter
deck. Be sure the blades are in good condition and
the blade bolts are tight.
11. 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.
15. Use only Scag approved attachments and accessories.
Scag Approved Attachments:
RS-2
RS-ZT
GC-F4
GC-4D
Scag Approved Accessories:
Mulch Master
Traction Plus
Adjust-A-Grip
Turbo Baffle
Using unapproved attachments, (especially "stand-up"
riding attachments) may be hazardous.
MAINTENANCE AND STORAGE
1. Allow only trained personnel to service the machine.
WARNING:
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. ALWAYS FOLLOW OSHA
APPROVED OPERATION.
12. Do not touch the engine or muffler while the engine
is running or soon after it is stopped. These areas
could be hot enough to cause a burn.
13. Before leaving the operator’s position or leaving the
mower unattended, shift the transmission into
neutral, place the neutral latches in the neutral lock
position, and move the blade engagement switch to
OFF. Shut the engine OFF and remove the key.
14. Do not pass or stand on the grass discharge side of
any mower with the engine running. Stop operation
when another person approaches.
1. Disconnect the spark plug wire from the spark plug
to prevent accidental starting of the engine when
servicing, adjusting or storing the machine.
2. If the mower must be tipped to perform maintenance or adjustment, remove the battery, drain the
gasoline from the fuel tank and the oil from the
crankcase.
3. To reduce potential fire hazard, keep the engine free
of excessive grease, grass, leaves and accumulations
of dirt.
4. Be sure the machine is in safe operating condition by
keeping nuts, bolts, and screws tight. Check the
blade mounting bolts and nuts frequently to be sure
they are tight.
5. If the engine must be running to perform a maintenance adjustment, keep hands, feet, clothing and
other parts of the body away from the cutter deck
blades and other moving parts.
WARNING
FALLING HAZARD
USE ONLY SCAG APPROVED
RIDING ATTACHMENTS
SEE OPERATOR'S MANUAL
481109
6. Do not overspeed the engine by changing governor
settings. To be sure of safety and accuracy, have an
authorized dealer check maximum engine speed with
a tachometer.
7. The engine must be shut off before checking the oil
5
or adding oil to the crankcase.
8. Allow the engine to cool before storing the mower in
any enclosure such as a garage or storage shed.
Make sure the fuel tank is empty if the machine is to
be stored in excess of 30 days. Do not store the
mower near any open flame or where gasoline fumes
may be ignited by a spark.
MOWER OPERATION
1. Read and understand the safety instructions
before attempting to operate this machine.
2. Before starting the engine:
9. Always store gasoline in a safety-approved, red
container.
10. Be careful when servicing the battery as it contains acid, which is corrosive and could cause
burns to skin and clothing.
11. Batteries release explosive gases when being
charged or discharged. Keep batteries away from
any source of sparks and/or flame.
INITIAL RUN-IN PROCEDURES
(FIRST DAY OF USE OR APPROXIMATELY 10 HOURS)
1. Check the belts for proper tension at 2, 4 and 8
hours. Adjust as needed.
2. Check the steering control rods for neutral
adjustment. (See Adjustments, page 6)
3. Check the tires for proper pressure.
Caster Wheels25 psi.
Drive Wheels15 psi.
4. Check for loose hardware. Tighten as needed.
5. Check the safety switches for proper adjustment:
* The engine will crank, but not start if the
machine is not in neutral.
* On electric start machines, the engine will not
crank if the PTO switch is on.
* The engine should crank and start if the
machine is in neutral and the PTO engagement
switch is OFF.
* Check the oil level in the engine.
* Fill the fuel tank with clean, fresh, lead-free
gasoline.
* Open the fuel valve on the bottom of the fuel
tank.
-NOTE-
Use gasoline with an octane rating no less than
87.
* The transmission must be in NEUTRAL.
* The blade clutch switch must be in the OFF
position.
* The operator's presence levers must be
released.
* The neutral latches must be in the neutral
lock position.
* The key switch must be on.
3. Start the engine:
* Choke as required. If the engine is cold, pull
the choke knob out. When the engine starts,
slowly push the choke in. If the engine stalls,
repeat the above operation. When the engine
is warm, choking may not be necessary.
4. Engage the cutter blades by depressing the operator
presence levers and pulling the blade clutch switch
into the ON position. Push the switch to the OFF
position to disengage the cutter blades.
6. Apply lubricant to all the grease fittings.
Lubricant was applied at the factory. This is
just a precautionary check to make sure that
all the fittings have been lubricated.
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE
390S0138
6
-NOTE-
SC400G
BELT
WASHER
"J" BOLT
NUT
CUTTER DECK DRIVE BELT TENSION
ALIGNMENT IDLER - L.H.
END OF L-SHAPED
BRACKET
BEL T TENSION
ADJUSTMENT IDLER
CUTTER DECK
ADJUSTMENT
IDLER
CHECK BLADE DRIVE
BEL T TENSION HERE
SC402G
DISCHARGE
AREA
When PTO is engaged or (possibly) disengaged,
a squealing sound from the underside of the
machine is normal. It is caused by the electric
clutch plates meshing as the cutter blades come
up to speed. For best equipment life, engage the
clutch with the engine at 3/4 throttle, not under
full load.
WARNING:
To avoid serious bodily injury and damage to the
transmission, the machine must be at a full stop
before shifting between gears or shifting between
forward and reverse.
5. Shift the transmission into gear for the desired
mowing speed.
-NOTE-
Top speed is suggested only for transport!
Figure 1
3.Adjust the RH blade drive belt using a belt tension
gauge. Adjust the belt so that the belt moves 1/2"
with 10 pounds of pressure. Adjust the tension by
tightening or loosening the J-bolt nut. (See Figure 2
& 3)
BELT
6. While squeezing the steering brake levers with
both hands, release both neutral latches.
7. When the steering brake levers are released, the
machine will travel straight. To make a right turn,
squeeze the RH lever. To turn left, squeeze the LH
lever.
8. TO STOP, squeeze both levers, lock the neutral
latches, and shift the transmission into neutral.
CUTTER DECK BELT ADJUSTMENTS
1. Remove the belt cover.
2. Adjust the cutter deck drive belt using a belt tension
gauge. Adjust the belt so that the belt moves 1/2"
with 10 pounds of pressure. Adjust the tension by
tightening or loosening the J-bolt nut. (See figure 1)
WASHER
NUT
Figure 2. RH Blade Belt Adjustment
SC401G
ire pressure can be adjusted for
Due to initial belt stretch and to prevent the belt
from slipping, check this adjustment after the
first 2 hours, 4 hours and 8 hours of operation.
-NOTE-
Figure 3. Cutter Deck Belts
7
TRANSMISSION DRIVE BELT
CUTTER DECK ADJUSTMENTS
Adjust the transmission drive belt so that there is about a
3/16" deflection with 10 lbs. of pressure. Adjust by
loosening idler pulley mounting bolt and sliding the idler
left or right to change belt tension.
DRIVE CONTROL ADJUSTMENTS
1. Adjust the steering control rods so that there is
approximately 3/4" clearance from the bottom of
the rod to the bottom of the neutral latch slot when
in the drive position. (See Figure 4)
NEUTRAL
LATCH
NEUTRAL LOCK
POSITION
DRIVE POSITION
Due to the many cutting conditions that exist, it is difficult
to suggest a cutter deck setting that will work for every
lawn. There are two adjustments that can be made on
these decks, pitch and height.
PITCH is the angle of the blades (comparing front to
rear). A 1/4" downward pitch (front of deck down) is
recommended for best cutting performance.
HEIGHT is the nominal distance the blade is off of the
ground. This measurement is made with the blades
pointed side to side and distance is measured between
cutting tip and ground. (Also see Blade Height Adjust-
ment, next page)
Changes to the cutting height can be achieved by repositioning the cutter deck. (This adjustment will also effect
the pitch of the deck.) There are three available positions (see Figure 5).
LOW CUT (1 3/4" to 3")
3/4"
STEERING
BRAKE LEVER
SC404GB
Figure 4. Steering Control Rod Adjustment
2. Adjust the steering brake rods so that the brakes
do not apply until the steering levers are pulled tight
to the handles. When the steering levers are
locked in the neutral position the machine should
move freely.
MID RANGE
(2 1/2" to 3 3/4")
HIGH CUT
(3 1/4" to 4 1/2")
CUTTER DECK HEIGHT ADJUSTMENT
Figure 5. Cutting Height Adjustment
SC405G
8
Caster spacers also can be repositioned to change
cutting heights and to change the pitch of the deck. (See
Figure 6)
Pin
Spacers
2002SGB005
Figure 6. Caster Wheel Spacers
BLADE HEIGHT ADJUSTMENT
Adjusting the blade height can be done by moving any
number of the five smaller 1/4" spacers on the blade
mounting bolts to the top of the spindle shaft or below
the spindle shaft.
-NOTE-
All blades should be positioned equally.
For best cut and discharge, a minimum of three spacers
should be installed between the blade and the spindle.
(See Figure 7)
CUTTER BLADES
Do not sharpen beyond 1/3 of the width of the blade.
(See Figure 8)
-NOTE-
Dress the blade with a file. Using a wheel
grinder may burn the blade. Check the balance
of the blade. If blades are out of balance, vibration and premature wear of spindle assembly can
occur. See your authorized Scag dealer for
blade balancing or special tools if you choose to
balance your own blades.
Do Not Cut In
2002 SC407G
Figure 7. Blade Spacers
Angle Blade Back
X
X Must NOT Exceed
30
1/3 Blade Width
Figure 8. Blade Sharpening
2002SGB033
9
LUBRICATION & MAINTENANCE
BREAK-IN
8 HOURS (DAILY)
40 HOURS (WEEKLY)
+ Grease spindle until grease comes out the relief valve.
Compatible Greases:Lidok EP #2 (found at industrial shops)
Ronex MP (Exxon service stations)
Shell Alvania (Shell service stations)
100 HOURS (BIWEEKLY)
Mobilux #2 (Mobil service stations)
Super Lub M EP #2 (Conoco service stations)
500 HRS OR ANNUALLY
PROCEDURE
X
X
XCheck engine oilDo not over fill
XRemove debris from under belt coverMore often if needed
XSharpen cutter bladesMore often if needed
XGrease spindle bearings+ US Lithium MP White Grease 2125
XClean air filterMore often if needed
XCheck belt tension
XCheck tire pressureAdd or adjust as required
XChange engine oilSee engine mfg. information
XReplace air filterMore often if needed
XGrease caster wheel bearingsChassis grease
XGrease caster wheel pivot shaftsChassis grease
XGrease idler pulley bracket on cutter deckChassis grease
XGrease drive wheel bearingsChassis grease
XGrease transmission couplersChassis grease
XGrease idler bracket LH & RHChassis grease
XCheck all hardware for proper tightnessMore often if needed
Check all hardware for proper tightness
Change engine oil and filter at 5 hours
XAdjust air gap on electric clutchContact your Scag dealer for information about
making this adjustment
COMMENTS
10
TROUBLESHOOTING CUTTING CONDITIONS
CONDITION
CAUSE
CURE
Stringers - OccasionalLow engine RPMRun engine at full 3600 RPM
Blades of Uncut
GrassGround speed too fastSlow speed to adjust for conditions
Wet grassCut grass after it has dried out
Dull blades, incorrect sharpeningSharpen blades
Deck plugged, grass accumulationClean underside of deck
Low engine RPMRun engine at full 3600 RPM
Belt slippingAdjust belt tension
Deck plugged, grass accumulationClean underside of deck
Ground speed too fastSlow speed to adjust for conditions
Wet grassCut grass after it has dried out
Width of Deck
SGB018
Bent bladesReplace blades
Streaking - Strips ofNot enough overlappingIncrease the overlap of each
Uncut Grass Betweenbetween rowspass
Cutting Paths
Width
of
Deck
SGB019
Width
of
Deck
11
TROUBLESHOOTING CUTTING CONDITIONS
CONDITION
CAUSE
CURE
Uneven Cut on Flat Lift worn off of bladeReplace blade
Ground - Wavy
High-Low Blade upside downMount with cutting edge toward
Appearance,ground
Scalloped Cut, or
Rough Contour Deck plugged,grass accumulationClean underside of deck
Too much blade angle (deck pitch)Adjust pitch and level
Deck mounted improperlySee your authorized SCAG dealer
Bent spindle areaSee your authorized SCAG dealer
Dull bladeSharpen blade
Width of Deck
SGB020
Uneven Cut on Uneven groundMay 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
SGB021
Sloping Ridge Across Tire pressures not equalCheck and adjust tire pressure
Width of Cutting Path
Wheels unevenCheck and adjust tire pressure
Deck mounted incorrectlySee your authorized SCAG dealer
Width of Deck
SGB023
12
TROUBLESHOOTING CUTTING CONDITIONS
CONDITION
CAUSE
CURE
Scalping - BladesLow tire pressuresCheck and adjust pressures
Hitting Dirt or
Cutting Very Close toGround speed too fastSlow speed to adjust for conditions
the Ground
Cutting too lowMay need to reduce ground speed,
raise cutting height, change direction
of cut, and/or change pitch and level
Rough terrainMay need to reduce ground speed,
raise cutting height, and/or change
direction of cut
Ground speed too fastSlow speed to adjust for conditions
Width of Deck
SGB022
Wet grassCut grass after it has dried out
Step CutBlades not mounted evenlyAdjust pitch and level
Ridge in Center of
Cutting PathBent bladeReplace blade
Internal spindle failureSee your authorized SCAG dealer
Mounting of spindle incorrectSee your authorized SCAG dealer
Width of Deck
SGB024
Slope Cut - SlopingBent spindle mounting areaSee your authorized SCAG dealer
Ridges Across Width
of Cutting PathInternal spindle failureSee your authorized SCAG dealer
Bent deck housingSee your authorized SCAG dealer
Width of Deck
SGB025
13
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