Scag Power Equipment SWZU User manual

MODEL SWZU
OPERATOR’S MANUAL
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 03101

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:
SWZU36A-15KA with seri l number of 7400001 to 7409999
SWZU48A-17KA with seri l number of 7410001 to 7419999
SWZU52A-17KA with seri l number of 7420001 to 7429999
SWZU-21KAE with seri l number of 7470001 to 7479999
SWMU-52A with seri l number of 7480001 to 7489999
SWMU-61A with seri l number of 7490001 to 7499999
Always use the entire serial number listed on the serial number
tag when referring to this product.
WARNING:

TABLE OF CONTENTS
SUBJECT PAGE
Introduction.................................................................................................. 1
General Safety Instructions.......................................................................... 1
Signal Words ............................................................................................... 1
Symbols....................................................................................................... 2-3
Before Operating ......................................................................................... 4
While Operating........................................................................................... 4
Maintenance and Storage ........................................................................... 5
Initial Run-In Procedures ............................................................................. 6
Mower Operation ......................................................................................... 6
Cutter Deck Belt Adjustments...................................................................... 7
Cutter Deck Adjustments ............................................................................. 8
Blade Height Adjustments ........................................................................... 8
Cutter Blades............................................................................................... 9
Neutral Adjustment ...................................................................................... 9
Steering Control Rod Adjustment ................................................................ 10
Tracking Adjustment .................................................................................... 10
Parking Brake .............................................................................................. 10
Lubrication and Maintenance Chart ............................................................ 11
Troubleshooting Cutting Conditions ............................................................ 12-14
Technical Specifications.............................................................................. 15-16
Notes..........................................................................................................................17
I
WE SUPPORT OPE
TECHNICIAN
CERTIFICATION

TABLE OF CONTENTS
(CONTINUED)
SUBJECT PAGE
Illustrated Parts List
SWMU-36"A Cutter Deck.................................................................. 18-19
SWMU-48"A,52"A &61"ACutterDecks.................................................20-21
CutterDeckFrame36"...............................................................................22-23
CutterDeckFrame48"&52"SmallFrame.............................................24-25
Cutter Deck Frame 52" & 61" Large Frame ....................................... 26-27
EngineDeck................................................................................................ 28-29
DriveAndBrakeComponents.................................................................. 30-31
HandleAssembly........................................................................................ 32-33
Hydraulic Assembly.......................................................................... 34-35
Hydraulic Pump Assembly................................................................ 36-37
EngineDeckWireHarness- 15KA & 17KA......................................... 38
HandleWireHarness -ManualStart...................................................... 38
EngineDeckWire Harness-21HP KA Electric Start............................. 39
HandleWireHarness-21HPKAElectric Start....................................... 39
ReplacementDecals.................................................................................. 40-41
WarrantyStatement...............................................................InsideBackCover
II

1
SIGNALWORDS
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 through-
out this manual that alerts the viewer to the existence
and relative degree of the ha ard.
The signal word DANGER denotes that an ex-
tremely ha ardous situation exists on or near the
machine that could result in high probability of death
or irreparable injury if proper precautions are not
taken.
The signal word WARNING denotes that a ha ard
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.
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 instruc-
tions 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 com-
plete model and serial number of your Scag product.
USE O OTHER THAN ORIGINAL SCAG
REPLACEMENT PARTS WILL VOID THE
WARRANTY.
The Right and Left, Front and Rear of the
machine are referenced from the operators perspec-
tive when in the normal operating position and facing
the forward travel direction.
GENERALSAFETYINSTRUCTIONS
READ THIS OPERATOR'S MANUAL and
instructions furnished with attachments.
Perform only those maintenance procedures de-
scribed in this manual. If major repairs are ever
needed or assistance is desired, contact an Author-
i ed Scag Dealer. To ensure optimum performance
and safety, always purchase genuine SCAG replace-
ment parts and accessories.
Your safety and the safety of others depends signifi-
cantly upon your knowledge and understanding of all
correct operating practices and procedures of this
machine.
WARNING:
CAUTION:

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

3
SlowFast
C tting element - Engage
C tting element - Basic symbol
C tting element - Disengage
Contin o sly variable - Linear
Read operator's man al
Keep bystanders away
Pinch Point
481039S
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Ho rmeter/elapsed operating ho rs

4
BEFOREOPERATING
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. 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.
4. 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.
5. Do not operate the machine while wearing san-
dals, 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.
6. 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.
7. Before attempting to start the engine, move the
speed adjustment lever into the neutral position,
move the blade engagement switch to the OFF
position, apply the parking brake, and move the
neutral latches to neutral.
WHILEOPERATING
1. Start the engine when the neutral latches are in the
neutral lock position, the cutter blades are disen-
gaged, the parking brake is on and the speed
adjustment lever is in the neutral position.
2. Do not run the engine in a confined area without
adequate ventilation. Exhaust fumes are ha ard-
ous and could possibly be deadly.
3. 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 ha ards.
C. Do not drive close to a drop-off, ditch, creek
bank, or other ha ard.
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.
4. 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 remov-
ing the obstruction.
5. Disengage the blades and wait for them to stop
before crossing gravel drives, walks or roads.
6. Shut the engine off and wait until the blades come
to a complete stop before removing the grass
catcher container.
7. Never raise the cutter deck while the blades are
rotating.
8. Always park the mower and/or start the engine on
a level surface. Apply the parking brake to
prevent the mower from moving when you are not
in the operators position.

5
13. Do not pass or stand on the grass discharge side
of any mower with the engine running. Stop
operation when another person approaches.
9. If the cutting blades should strike a solid object
or the equipment should start to vibrate abnor-
mally, 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.
10. 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 back up it (with the cutter deck
down). If the machine can back up the slope
without the wheels slipping, reduce speed and
useextremecaution. ALWAYSFOLLOW OSHA
APPROVED OPERATION.
11. 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.
12. Before leaving the operators position or leaving
the mower unattended, move the speed adjustment
lever into the neutral position, place the neutral
latches in the neutral lock position, apply the
parking brake, and move the blade engagement
switch to OFF. Shut the engine OFF and remove
the key.
14. Use only Scag approved riding attachments.
Scag Approved Riding Attachments:
RS-ZT
Using unapproved attachments, (especially "stand-
up" riding attachments) may be ha ardous.
MAINTENANCEAND STORAGE
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 mainte-
nance or adjustment, remove the battery, drain the
gasoline from the fuel tank and the oil from the
crankcase.
3. To reduce potential fire ha ard, 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 tightened.
5. If the engine must be running to perform a mainte-
nance adjustment, keep hands, feet, clothing and
other parts of the body away from the cutter deck
blades and other moving parts.
6. Do not overspeed the engine by changing gover-
nor settings. To be sure of safety and accuracy,
have an authori ed dealer check maximum engine
speed with a tachometer.
7. The engine must be shut off before checking the
oil 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.
WARNING:
WARNING
FALLING HAZARD
USE ONLY SCAG APPROVED
RIDING ATTACHMENTS
SEE OPERATOR'S MANUAL
481109

6
9. Always store gasoline in a safety-approved, red
container.
10. Be careful when servicing the battery as it con-
tains 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.
12. Make sure all hydraulic connections are tight and
all hydraulic hoses and lines are in good condi-
tion before starting the machine.
13. Hydraulic fluid is under high pressure. If you
need service on your hydraulic system, please see
your authori ed Scag dealer.
INITIAL RUN-IN PROCEDURES (FIRST
DAY OF USE ORAPPROXIMATELY 10
HOURS)
1. Check the steering control rods and the speed
control for neutral adjustment. (See Adjust
ments, page 6-8)
2. Check the tires for proper pressure.
Caster Wheels 25 psi.
Drive Wheels 15 psi.
3. Check for loose hardware. Tighten as needed.
4. Check the safety switches for proper adjustment:
* The engine should crank and start if the
machine is in neutral, the PTO engagement
switch is OFF and the parking brake is
ON.
5. Apply lubricant to all the grease fittings. Lubri-
cant was applied at the factory. This is just a
precautionary check to make sure that all the
fittings have been lubricated.
gasoline.
* Open the fuel valve on the bottom of the fuel
tank.
-NOTE-
Use gasoline with an octane rating no less than
87.
* The speed adjustment lever must be in NEU-
TRAL.
* The blade clutch switch must be in the OFF
position.
* The neutral latches must be in the neutral lock
position.
* The key switch must be on.
* The parking brake must be on.
* Engage the cold start declutch if needed.
3. Start the engine:
* Choke as required. If the engine is cold, pull
the choke knob out on the 15HP, 17HP &
21HP Kawasaki engines. 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. To properly b rnish the electric PTO cl tch brake,
follow the following steps.
A. Start and run the engine at approximately
3/4 throttle.
B. Engage and disengage the PTO
approximately 25 times, waiting for 10
seconds between each on/off cycle.
MOWEROPERATION
1. Read and understand the safety instructions
before attempting to operate this machine.
2. Before starting the engine:
* Check the oil level in the engine and the
hydraulic reservoir.
* Fill the fuel tank with clean, fresh, lead-free

7
-NOTE-
Burnishing the electric clutch improves
longevity and performance and should be done
on every new machine and after a clutch
replacement. The burnishing procedure should
not be performed while cutting grass.
5. Engage the cutter blades by pulling the blade clutch
switch into the ON position. Push the switch to the
OFF position to disengage the cutter blades.
-NOTE-
When the PTO is engaged or possibly) disen-
gaged, a squealing sound from the underside of
the machine is normal. It is caused by the
electric clutch plates meshing as the mower
comes up to speed. For best equipment life,
engage the clutch with the engine at 3/4
throttle, not under full load.
If you are not familiar with the operation of the
hydrostatic drive and zero turn feature, practice
turning and maneuvering with the hand controls
before engaging the cutter blades.
6. Release the parking brake. Move the speed
adjustment lever to the desired mowing speed.
-NOTE-
Top speed is suggested only for transport!
7. While squee ing the steering brake levers with both
hands, release both neutral latches.
8. When the steering brake levers are released, the
machine will travel straight. To make a right turn,
squee e the RH lever. To turn left, squee e the LH
lever.
ire pressure can be adjusted for
WARNING:
Figure 1. Dump Valves
CUTTER DECK BELT ADJUSTMENTS
-NOTE-
All the belts on the SWZU are spring loaded
and do not require adjustment. Check the belts
for excessive wear or damage daily for the first
week. After the first week, check the belts
monthly.
1. Remove the belt covers.
2. Inspect the belts for wear, cracking, or gla ing.
Contact your Scag dealer if any unusual wear is
noted.
3. Replace the belt covers.
390S0138
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE
Access Right Dump Valve
From Front Of Machine
DumpValve Levers
(normal position)
SWZU99DV
9. TO STOP, squee e both levers, lock the neutral
latches, and move the speed adjustment lever to
neutral.
10. To move the machine in reverse, squee e up on both
steering control levers.
11. To "freewheel" or move the machine around without
the engine running, turn the dump valve levers located
at the back of the pumps to the "freewheel" positions
(see Figure 1). To operate the machine, the dump
valve levers must be returned to the closed positions.

8
Figure 2. Cutting Height Adjustment
CUTTER DECK ADJUSTMENTS
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.
Changes to the cutting height can be achieved by
repositioning the cutter deck. There are eight available
positions from 1" to 4-1/2" (see Figure 2).
WARNING:
Do not adjust the cutting height with the mower
blades rotating. Shut off the engine and remove
the ignition key. Bodily injury could occur from
the rotating blades.
1. Shut off the engine and remove the ignition key.
2. While holding up on the deck support handle,
remove the two hairpins from the adjusting pins on
one side of the cutter deck (See Figure 2).
3. Lift or lower the deck to the desired cutting height
and reinstall the hairpins. A deck height decal is
located on the deck mounting frame as an aid in
adjusting the deck to the desired height.
4. Repeat the above process on the opposite side of
the cutter deck.
Remove Hair Pins
SWU99DHA
CUTTER DECK PITCH ADJUSTMENTS
The cutter deck pitch adjustment has been set at the
factory and normally will not need to be changed.
However, if the pitch needs to be adjusted due to
service work performed on the deck, follow the
procedure below (see Figure 3).
1. Shut off the engine and remove the key.
2. Support the cutter deck with four blocks (you
will be removing the hair pins to make this
adjustment).
3. Remove the front hair pins from the front deck
support pins.
4. Loosen the jam nuts on the deck support pins.
5. Turn the deck support pins to lengthen or shorten
the pins to reach the desired result.
6. Tighten the jam nut, replace the hair pin, and
remove the blocks. Check that the desired deck
pitch is achieved.

9
CUTTER BLADES
Do not sharpen beyond 1/3 of the width of the blade.
(See Figure 4)
-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, vibra-
tion 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.
COLD STARTING
In the spring and fall when the morning temperatures
are cool it may be difficult to start the machine due to
the parasitic load from the hydraulic drive. To relieve
this load, pull out and up on the de-clutch chain located
on the right side of the machine behind the tire. This will
allow you to start the engine easily. When the engine has
warmed up, slowly release the de-clutch chain to engage
the hydraulic system.
Figure 4. Blade Sharpening
NEUTRAL ADJUSTMENT
-NOTE-
Neutral has been set by your Scag dealer at the
time of setup and normally does not need to be
adjusted. If, however, you find that neutral has
come out of adjustment, follow the procedure
below.
1. Raise the drive wheels off the ground and block
the caster wheels.
2. Make sure the speed control lever is in neutral,
the steering control levers are in the neutral latch
position, and the parking brake is on. Start the
engine.
3. Release the parking brake and note if the tires are
rotating.
4 . Starting on the left side of the machine, rotate the
tracking adjustment knob counter clockwise just
until the LH wheel starts to creep forward. Make
a note of the position of the adjusting knob. (See
Figure 4).
5. Turn the adjusting knob clockwise just until the
wheel turns rearward. Make a note of the posi-
tion of the adjusting knob. To adjust neutral, split
the difference between the two noted positions of
the adjusting knob.
6. Turn the engine off.
Figure 4. Neutral Adjustment
Figure 3. Deck Pitch Adjustment
SWU99PA
REMOVE HAIR PIN
LOOSEN
JAM NUT
481878
SLOW
FAST
TRACKING
ADJUSTMENT
SEE OPERATOR'S
MANUAL
2002SGB033
Angle Blade Back
Do Not Cut In
X Must NOT Exceed
1/3 Blade Width
X
30

10
2. Squee e the steering control levers and release the
neutral latch. Slowly release the steering control
levers, allowing the machine to move forward.
3. If the machine pulls to one side, turn the tracking
adjustment knob on the slower side counter clock-
wise until the machine tracks straight.
(See Figure 6)
4. Bring the steering control levers back to the neutral
lock position and check to see that the machine
does not creep forward on the adjusted wheel.
5. If the machine creeps in neutral you have moved out
of the neutral band and will have to turn the tracking
adjustment knob clockwise until the machine does
not creep.
6. Repeat steps 1 and 2. If the machine pulls to one
side, turn the tracking adjustment knob on the faster
side clockwise until the machine tracks straight.
8. If tracking cannot be achieved, contact your Scag
servicing dealer.
PARKING BRAKE
1. Adjust the parking brake so that when the brake
hand lever is against the stop on the handle bar, the
brake levers on the brake shaft weldment are
against the stops on the engine deck.
Adjust the brake only enough to hold the
machine. Excessive force may cause damage
to the machine or brake components.
2. Adjust the brake actuator rod on either side of the
machine to obtain proper brake adjustment.
STEERING CONTROL ROD
ADJUSTMENT -NOTE-
This adjustment is made to allow the steering
control levers to be moved out of the neutral
latch without engaging reverse.
Before making this adjustment be sure that the
speed control bearing is just touching the speed
control cam and that the bellcrank bearing is
resting in the center groove of the neutral cam.
1. Remove the speed control spring. Remove the
steering control rod swivel hair pin. Check the
location of the swivel in the slotted hole in the bell
crank .
2. Turn the swivel joint on the steering control rods
until the swivel joint is centered in the slot in the
bellcrank.
3. Reinstall the speed control spring onto the swivel.
Install the hair pin onto the swivel.
TRACKING ADJUSTMENT
-NOTE-
Before proceeding with this adjustment, be sure
that the tire pressures are correct see page 4)
and that the neutral adjustment and the steering
control rod adjustment have been completed.
1. With the machine on a flat level surface, start the
engine and place the speed adjustment lever into the
speed that will most often be used.
CAUTION:
Figure 5. Control Rod Adjustment
481878
SLOW
FAST
TRACKING
ADJUSTMENT
SEE OPERATOR'S
MANUAL
Figure 6. Tracking Adjustment
481878
SLOW
FAST
TRACKING
ADJUSTMENT
SEE OPERATOR'S
MANUAL
390s0198
Center of
Slot

11
COMMENTS
PROCEDURE
LUBRICATION & MAINTENANCE
+ 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)
Mobilux #2 (Mobil service stations)
Super Lub M EP #2 (Conoco service stations)
X
X
BREAK-IN
8 HOURS (DAILY)
40 HOURS (WEEKLY)
100 HOURS (BIWEEKLY)
500HRSORANNUALLY
Check all hardware for proper tightness
Change engine oil and filter at 5 hours
X Check engine oil Do not over fill
X Remove debris from under belt cover More often if needed
X Sharpen cutter blades More often if needed
X Grease spindle bearings + S Lithium MP White Grease 2125
X Clean air filter More often if needed
X Check tire pressure Add or adjust as required
X Check battery level Adjust as needed
X Replace air filter More often if needed
X Grease caster wheel bearings Chassis grease
X Grease caster wheel pivot shafts Chassis grease
X Change hydrostatic oil filter Clean area before removing the filter
X Change engine oil and filter See engine manufacturer information
X Grease brake hand lever Chassis grease
X Grease brake actuator levers Chassis grease
X Check all hardware for proper tightness
X Adjust air gap on electric clutch Contact your Scag dealer for information about
X Drain hydraulic system and replace oil making this adjustment.

12
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
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

13
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

14
Scalping - Blades Low tire pressures Check and adjust pressures
Hitting Dirt or
Cutting Very Close to Ground speed too fast Slow speed to adjust for conditions
the Ground Cutting too low May need to reduce ground speed,
raise cutting height, change direction
of cut, and/or change pitch and level
Rough terrain May need to reduce ground speed,
raise cutting height, and/or change
direction of cut
Ground speed too fast Slow speed to adjust for conditions
Wet grass Cut grass after it has dried out
Step Cut Blades not mounted evenly Adjust pitch and level
Ridge in Center of
Cutting Path Bent blade Replace blade
Internal spindle failure See your authorized SCAG dealer
Mounting of spindle incorrect See your authorized SCAG dealer
Slope Cut - Sloping Bent spindle mounting area See your authorized SCAG dealer
Ridges Across Width
of Cutting Path Internal spindle failure See your authorized SCAG dealer
Bent deck housing See your authorized SCAG dealer
TROUBLESHOOTING
CONDITION CAUSE CURE
Width of Deck
SGB024
Width of Deck
SGB025
Width of Deck
SGB022

15
TECHNICAL SPECIFICATIONS
ENGINES
General Type: Heavy duty industrial/commercial
Brand: Kawasaki
Models: Kaw.FH451V(15HP);Kaw.FH500V(17HP);Kaw.FH641V(21HP)
Horsepower: Kaw 15HP; Kaw. 17HP; Kaw. 21HP
Type: 4 cycle gas, vertical shaft engines
Displacement: Kawasaki: 15HP = 494cc
Kawasaki: 17HP = 494cc
Kawasaki: 21HP = 675cc
Cylinders: Kohler - 1 cast iron; Kawasaki - 2 cast iron
Governor: Mechanical type governor with variable speed control set
at 3600 rpm (+75 rpm), idle set at 1200 rpm (+75 rpm)
Exhaust Group: Single exhaust canister muffler
Fuel Pump Group: Varied - See manufacturer's specifications
Oil Pump Group: Varied - See manufacturer's specifications
Valve Group: Varied - See manufacturer's specifications
Starter/Electrical: Electronic Ignition with recoil starter or 12 volt battery with
alternator, solid state ignition with key start
ChargingSystem: 13amp
ENGINE DECK
Thickness: 7gaugesteel
Fuel Tank: 5 gallon (19.0 liters) seamless polyethylene
DriveWheels/Tires: SWZU36A - 18 x6.50-8four-plypneumatic tubeless
SWZU48A & 52A - 18 x 8.50-8 four-ply pneumatic tubeless
Brakes: Dynamic braking through hydro drive system
Axles: 1" tapered
Handle Bars: 1-1/4" diameter
DRIVE SYSTEM
Type: Hydro drive with two variable displacement pumps and two
cast-iron high torque motors
Hydro Pumps: Two Hydro-Gear Model BDP 10L pumps with dump valves for
movement without running the engine
Drive Wheel Motors: Two 12 cu. inch cast-iron high torque motors
Hydro Fluid Cooling Group: 4 qt. capacity cooling, reservoir, uses SAE 20W50 fluid and
10 micron filter
Steering / Travel Control:: Independent handle controls for each wheel, squeeze to move
from forward to neutral to reverse, neutral lock lever, speed
range controlled with single lever (patented design), "Adjust-A-
Trac" in-field tracking adjustment with no tools necessary
Parking Brakes: 7.5" drum, band brake, one on each wheel
Dump Valves: Allows for movement without engine running
Cold Start: "De-Clutch Cold-Start" enhances cold weather starting using a
pull chain to relieve pump pressure
Axles: 1" tapered motor shafts
Wire Harness: 14 gauge wire
Safety Group: Handle actuated operator presence system (patented design),
blade / clutch and transmission interlock to engine kill
ForwardSpeedRange: 0 to 7.4 mph
ReverseSpeedRange: 0 to 3.0 mph
Date of Issue: February, 2001
Specifications Subject to Change Without Notice

16
TECHNICAL SPECIFICATIONS (CON'T.)
CUTTER DECKS SWMU 36A, SWMU 48A, SWMU52A, SWMU 61A
Type: Out-front design with anti-scalp rollers
Construction: SWMU36A,48A,52A,61A:7-gaugesteelwith7-gauge(3/
16") steel skirt
CuttingWidth: 35.5" (90.2 cm), 48.0 (122.0 cm)
Cutting Height Adjustment: Adjustable from 1" to 4-1/2" in 1/2" increments
CutterBlades: .197 thick, milled edge,WearResistant Marbane
SWMU 36: Two (2) 18"; SWMU 48:Three (3)16.5"
SWMU52:Three(3)18"
BladeEngagement: Electric blade brake clutch with instrument panel switch
DischargeOpening: Extrawide 11.5",dischargeopeningwithspring loaded
dischargechute
CasterWheels: 11x 4.5-5 smooth tread flotation, split rims, roller
bearings, with quick pin removal
Spindles: Cast housing, taper roller bearing, low maintenance with
top access grease fitting and grease overfill relief poppet
Spindle Pulleys: Cast-iron with easily removed taper hubs
Idler Pulley: 5" diameter pulley, welded and riveted construction,
1-3/8" O.D. Bearing
Idler Arm: Heavy duty dual ball bearing mounting
Cutter Deck Belts: B-section with Kevlar cord
OPTIONAL ITEMS/ATTACHMENTS
Fabric Grass Catcher: GC-F4 Grass Catcher with 4 cubic ft. capacity
Metal Grass Catcher: GC-4D Grass Catcher with 4 cubic ft. capacity and rope pull
dump or pick-up and dump
Steerable Sulky: RS-ZT Steerable Sulky with padded seat and full articulation
for zero-radiusturning
Mulch Master: Steel plate fits over discharge opening with individual
chamberbafflesbetweeneachblade.EliminatorMulching
Bladesarerequired (included). Installs andremovesin the
field.
APPROXIMATE DIMENSIONS SWZU36A SWZU48A SWZU52A SWZU61A
Length: 77.5" 76.0" 77.0" 79.0"
LengthwithGrassCatcher: 77.5" 76.0" 76.0" 79.0"
TrackingWidth 36.0" 38.0" 38.0" 41.0"
Width: 46.5" 58.0" 60.0" 70.0"
Width(withdischargechuteup): 37.5" 48.0" 50.0" 62.0"
With with grass catcher: 55.0" 64.0" 66.0" 80.0"
Height: 43.0" 43.0" 43.0" 40.5"
Height with grass catcher: 43.0" 43.0" 43.0" 40.5"
Weight 575 lbs. 640 lbs. 680 lbs. 665lbs.
Weight with grass catcher: 615 lbs. 680 lbs. 720 lbs. 705lbs.
TurningRadius: Zero Zero Zero Zero
Date of Issue: February, 2001
SpecificationsSubject To ChangeWithout Notice