Scag Power Equipment SWZU User manual

MODEL SWZU
OPERATOR’SMANUAL
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. THESPECIFICMODELSTHAT THIS
BOOK COVERS ARE CONTAINED ON THE
INSIDECOVER. BEFOREOPERATINGYOUR
MACHINE, PLEASE READ ALL THE INFOR-
MATION ENCLOSED.
PART NUMBER 03067

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.
WARNING:
This manual covers the operating instructions
and illustrated parts list for:
SWZU36-15KH with a serial number of 4780001-4789999
SWZU48-17KA with a serial number of 4790001-4799999
Always use the entire serial number listed on the serial number
tag when referring to this product.

TABLE OF CONTENTS
SUBJECT PAGE
Introduction.................................................................................................. 1
General Safety Instructions.......................................................................... 1
Signal Words ............................................................................................... 1
Before Operating ......................................................................................... 2
While Operating........................................................................................... 2
Maintenance and Storage ........................................................................... 3
Initial Run-In Procedures ............................................................................. 4
Mower Operation ......................................................................................... 4
Cutter Deck Belt Adjustments...................................................................... 5
Cutter Deck Adjustments ............................................................................. 6
Blade Height Adjustments ........................................................................... 6
Cutter Blades............................................................................................... 7
Neutral Adjustment ...................................................................................... 7
Steering Control Rod Adjustment ................................................................ 8
Tracking Adjustment .................................................................................... 8
Parking Brake .............................................................................................. 8
Lubrication and Maintenance Chart ............................................................ 9
Troubleshooting Cutting Conditions ............................................................ 10-12
Technical Specifications.............................................................................. 13-14
Notes..........................................................................................................................15
I
WE SUPPORT OPE
TECHNICIAN
CERTIFICATION
Equipment & Engine
Training Council
c
MEMBER

TABLE OF CONTENTS
(CONTINUED)
SUBJECT PAGE
Illustrated Parts List
SWM-36"Cutter Deck........................................................................ 16-17
SWM-48",52",61",72"CutterDecks...................................................... 18-19
EngineDeck................................................................................................ 20-21
DriveAndBrakeComponents..................................................................22-23
HandleAssembly........................................................................................ 24-25
Hydraulic Assembly.......................................................................... 26-27
Hydraulic Pump Assembly................................................................ 28-29
Engine DeckWire Harness-Kohler (Single Cyl.) & 17KA................... 30
Engine Deck Wire Harness- Kohler Command V-Twin...................... 30
HandleWireHarness-ElectricStart......................................................... 31
WireHarnessW/Relay............................................................................... 31
EngineDeckWire Harness-14 Kawasaki...............................................32
HandleWireHarness-ManualStart......................................................... 32
ReplacementDecals.................................................................................. 33-35
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
safetymessagesfoundonthedecalsandthroughout
this manual. The message that follows the symbol
containsimportantinformationaboutsafety. 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 through-
out this manual that alerts the viewer to the existence
and relative degree of the hazard.
The signal word “DANGER” denotes that an ex-
tremely hazardous situation exists on or near the
machinethat could result in high probability of death
or irreparable injury if proper precautions are not
taken.
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.
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,theprolongedlife and maximum
efficiency of your mower depends on you following
theoperating,maintenanceandadjustmentinstruc-
tionsinthismanual.
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.
USEOFOTHERTHANORIGINAL SCAG
REPLACEMENTPARTSWILLVOIDTHE
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
READTHISOPERATOR'SMANUALand
instructionsfurnishedwithattachments.
Performonlythosemaintenance procedures de-
scribed in this manual. If major repairs are ever
needed or assistance is desired, contact an Author-
izedScag 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-
cantlyuponyourknowledgeandunderstandingofall
correct operating practices and procedures of this
machine.
WARNING:
CAUTION:

2
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
properinstruction.
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
safeoperatingcondition.
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. Donotsmoke 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. Beforeattemptingtostarttheengine,movethe
speed adjustment lever into the neutral position,
movethe bladeengagementswitch totheOFF
position, apply the parking brake, and move the
neutrallatches toneutral.
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
adequateventilation. Exhaustfumes arehazard-
ous and could possibly be deadly.
3. Usingthemachinedemandsattention. 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,orotherhazard.
D. Reduce speedwhen making sharpturns and
whenturningon 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
dischargearea shouldplug,shut theengineoff
and wait for all movement to stop before remov-
ingtheobstruction.
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
catchercontainer.
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
preventthe mower frommoving when youarenot
in the operator’s position.

3
13. Do not pass or stand on the grass discharge side
ofany mowerwith the enginerunning. 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 theengine, disconnect thespark plug
wire, and check immediately for the cause.
Vibration is generally a warning of trouble.
Checkthe machine fordamagedor 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
aretight.
10. Reduce speed and exercise extreme caution on
slopes and in sharp turns to prevent tipping or
loss of control. Be especially cautious when
changingdirections 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
useextreme caution. ALWAYSFOLLOWOSHA
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
themowerunattended,movethespeedadjustment
lever into the neutral position, place the neutral
latches in the neutral lock position, apply the
parkingbrake,andmovethebladeengagement
switch to OFF. Shut the engine OFF and remove
thekey.
14. UseonlyScagapproved ridingattachments.
ScagApprovedRidingAttachments:
RS-ZT
Usingunapprovedattachments,(especially"stand-
up"ridingattachments)maybehazardous.
MAINTENANCE AND STORAGE
1. Disconnect the spark plug wire from the spark
plugto prevent accidental startingofthe engine
whenservicing,adjusting orstoring themachine.
2. If the mower must be tipped to perform mainte-
nanceor adjustment,remove the battery,drain the
gasolinefrom 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
accumulationsofdirt.
4. Be sure the machine is in safe operating condition
by keeping nuts, bolts, and screws tight. Check
theblademountingbolts andnutsfrequentlytobe
suretheyaretightened.
5. Iftheenginemustberunningtoperformamainte-
nanceadjustment,keephands,feet,clothingand
other parts of the body away from the cutter deck
blades and other moving parts.
6. Donotoverspeed theengineby changinggover-
nor settings. To be sure of safety and accuracy,
haveanauthorizeddealercheckmaximumengine
speed with a tachometer.
7. Theenginemustbeshutoffbeforecheckingthe
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

4
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
burnstoskinandclothing.
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-
tionbeforestartingthemachine.
13. Hydraulic fluid is under high pressure. If you
need service on your hydraulic system, please see
yourauthorizedScagdealer.
INITIAL RUN-IN PROCEDURES (FIRST
DAY OF USE OR APPROXIMATELY 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. Checkthe safety switches for proper adjustment:
* Theengine should crank and start if the
machineisinneutral,thePTOengagement
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
precautionarychecktomakesurethatallthe
fittingshave beenlubricated.
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.
* Thekey switch must be on.
*Theparkingbrakemustbeon.
3. Starttheengine:
* Choke as required. If the engine is cold, pull
thechoke knob out on the 17HP Kawasaki
engine; or push the throttle control all the way
forward on the 15HP Kohler engine. When
the engine starts, slowly push the choke in
(17HP) or pull back on the throttle (15HP). If
the engine stalls, repeat the above operation.
Whentheengineiswarm,choking maynotbe
necessary.
4. 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.
MOWEROPERATION
1. Readandunderstandthesafetyinstructions
beforeattemptingtooperatethismachine.
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

5
-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 1/2
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.
5. Release the parking brake. Move the speed
adjustment lever to the desired mowing speed.
-NOTE-
Top speed is suggested only for transport!
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 move the speed adjustment lever to
neutral.
9. To move the machine in reverse, squeeze up on
both steering control levers.
ire pressure can be adjusted forire pressure can be adjusted for
ire pressure can be adjusted forire pressure can be adjusted for
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 glazing.
Contact your Scag dealer if any unusual wear is
noted.
3. Replace the belt cover.
390S0138
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE
Access Right Dump Valve
From Front Of Machine
DumpValve Levers
(normal position)
SWZU99DV
10. To "freewheel" or move the machine around with-
outtheenginerunning,turnthedumpvalvelevers
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.

6
Figure 2. Cutting Height Adjustment
CUTTER DECK ADJUSTMENTS
Duetothemany cuttingconditions thatexist, itis
difficult to suggest a cutter deck setting that will work
for every lawn. There are two adjustments that can be
madeon 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
recommendedforbestcuttingperformance.
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
cuttingtipandground.
Changestothecuttingheightcan beachievedby
repositioning the cutter deck. (This adjustment will
also effect the pitch of the 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 (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 an 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. Shutoff theengineandremovethe key.
2. Support the cutter deck with four blocks (you
will be removing the hair pins to make this
adjustment).
3. Removethe front hair pinsfromthe front deck
support pins.
4. Loosenthe jam nuts on the deck support pins.
5. Turnthe decksupport pins to lengthen orshorten
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.