Scag Power Equipment SWZT36-481FS User manual

PART NO. 03332
PRINTED 3/2013
PRINTED IN USA
© 2013
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.
Congratulations on owning a Scag mower! 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 efciency. The specic models that
this book covers are listed on the inside cover. Before operating your machine,
please read all the information enclosed.
SWZT
Walk-Behind
Model: SWZT36-481FS
SWZT48-541FS
OPERATOR’S
MANUAL

WARNING
FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT
IN SERIOUS INJURY OR DEATH.
Read this manual completely as well as other manuals that came with your mower.•
ALWAYS FOLLOW OSHA APPROVED OPERATION.•
DO NOT operate on steep slopes.•
Always travel across slopes.•
DO NOT mow on wet grass. Wet grass reduces traction and steering control.•
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.•
Keep others off the mow• er (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:
SWZT36-481FS with a serial number of J3400001 to J3499999
SWZT48-541FS with a serial number of J3500001 to J3599999
Always use the entire serial number listed on the serial number tag when referring to this product.

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Table of Contents
Table of Contents
GENERAL INFORMATIONSECTION 1 - ...................................................................................1
1.1 INTRODUCTION...........................................................................................................................................1
1.2 DIRECTION REFERENCE ...........................................................................................................................1
1.3 SERVICING THE ENGINE AND DRIVE TRAIN COMPONENTS.................................................................1
1.4 SYMBOLS ....................................................................................................................................................2
SAFETY INFORMATIONSECTION 2 - ......................................................................................3
2.1 INTRODUCTION...........................................................................................................................................3
2.2 SIGNAL WORDS ..........................................................................................................................................3
2.3 BEFORE OPERATION CONSIDERATIONS................................................................................................3
2.4 OPERATION CONSIDERATIONS................................................................................................................4
2.5 MAINTENANCE CONSIDERATIONS & STORAGE ....................................................................................6
2.6 USING A SPARK ARRESTOR.....................................................................................................................6
2.7 SPARK IGNITION SYSTEM .........................................................................................................................6
2.8 SAFETY AND INSTRUCTIONAL DECALS.................................................................................................7
SPECIFICATIONSSECTION 3 - ................................................................................................8
3.1 ENGINE ........................................................................................................................................................8
3.2 ELECTRICAL ...............................................................................................................................................8
3.3 ENGINE DECK .............................................................................................................................................8
3.4 CUTTER DECK ............................................................................................................................................8
3.5 WEIGHTS AND DIMENSIONS.....................................................................................................................9
3.6 PRODUCTIVITY ...........................................................................................................................................9
OPERATING INSTRUCTIONSSECTION 4 - ...........................................................................10
4.1 CONTROLS AND INSTRUMENT IDENTIFICATION ................................................................................10
4.2 SAFETY INTERLOCK SYSTEM ................................................................................................................11
4.3 INITIAL RUN-IN PROCEDURES................................................................................................................11
4.4 STARTING THE ENGINE ...........................................................................................................................11
4.5 GROUND TRAVEL AND STEERING .........................................................................................................11
4.6 ENGAGING THE DECK DRIVE (CUTTER BLADES)................................................................................12
4.7 HILLSIDE OPERATION..............................................................................................................................13
4.8 PARKING THE MOWER .............................................................................................................................13
4.9 AFTER OPERATION ..................................................................................................................................13
4.10 REMOVING CLOGGED MATERIAL ........................................................................................................13
4.11 MOVING MOWER WITH ENGINE STOPPED..........................................................................................14
4.12 RECOMMENDATIONS FOR MOWING....................................................................................................14
TROUBLESHOOTING CUTTING CONDITIONSSECTION 5 - ...............................................15

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Table of Contents
ADJUSTMENTSSECTION 6 - .................................................................................................18
6.1 PARKING BRAKE ADJUSTMENT ............................................................................................................18
6.2 NEUTRAL ADJUSTMENT .........................................................................................................................18
6.3 NEUTRAL LATCH ADJUSTMENT ............................................................................................................19
6.4 TRACKING ADJUSTMENT ........................................................................................................................19
6.5 THROTTLE CONTROL AND CHOKE ADJUSTMENTS............................................................................20
6.6 BELT ADJUSTMENT .................................................................................................................................20
6.7 BELT ALIGNMENT.....................................................................................................................................20
6.8 CUTTER DECK ADJUSTMENTS ..............................................................................................................20
6.9 ELECTRIC CLUTCH ADJUSTMENT.........................................................................................................22
MAINTENANCESECTION 7 - ..................................................................................................24
7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS ......................................................24
7.2 LUBRICATION............................................................................................................................................25
7.3 HYDRAULIC SYSTEM ...............................................................................................................................26
7.4 ENGINE OIL ...............................................................................................................................................28
7.5 ENGINE FUEL SYSTEM ............................................................................................................................28
7.6 ENGINE AIR CLEANER.............................................................................................................................29
7.7 CUTTER BLADES......................................................................................................................................29
7.8 TIRES..........................................................................................................................................................30
ILLUSTRATED PARTS LISTSECTION 8 - ..............................................................................31
8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES......................................................................31
36" CUTTER DECK..........................................................................................................................................32
48" CUTTER DECK..........................................................................................................................................34
CUTTER DECK CONTROLS ...........................................................................................................................36
ENGINE DECK & HYDRAULIC SYSTEM........................................................................................................38
STEERING CONTROLS...................................................................................................................................40
BRAKE COMPONENTS ..................................................................................................................................42
ELECTRICAL SYSTEM AND THROTTLE CONTROL ....................................................................................44
SWZT FUEL SYSTEM......................................................................................................................................46
ZT-2800 HYDRAULIC AXLE ASSEMBLY........................................................................................................48
REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................50
SWZT ELECTRICAL SCHEMATIC ..................................................................................................................52
LIMITED WARRANTY - COMMERCIAL EQUIPMENSECTION 9 - T ..............Following Section 8

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Section 1
INTRODUCTION1.1
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.
If additional information or service is needed, contact your
Scag Power Equipment Dealer.
We encourage you to contact your dealer for repairs.
All Scag dealers are informed of the latest methods to
service this equipment and provide prompt and efficient
service in the field or at their service shop. They carry a
full line of Scag service parts.
- IMPORTANT -
The replacement of any part on this product
by other than the manufacturer's authorized
replacement part may adversely affect the
performance, durability or safety of this
product.
Use of other than original Scag replacement
parts will void the warranty.
When ordering parts, always give the model and serial
number of your mower. The serial number plate is
located on the frame of the machine near the engine and
hydraulic pump as shown in Figure 1-1.
R
MODEL
SERIAL
Division of Metalcraft of Mayville, Inc.
Mayville, Wisconsin 53050
Patents Issued and Pending
SERIAL NUMBER
PLATE LOCATION
Mower Serial Number Plate LocationFigure 1-1.
GENERAL INFORMATION
USE ONLY SCAG APPROVED ATTACHMENTS AND
ACCESSORIES.
Attachments and accessories manufactured by companies
other than Scag Power Equipment are not approved for
use on this machine. See Section 8-1.
WARNING
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 the time of approval for printing. Scag Power Equipment
reserves the right to make changes at any time without
notice and without incurring any obligation.
DIRECTION REFERENCE1.2
The “Right” and “Left”, “Front” and “Rear” of the machine
are referenced from the operator’s right and left when in
the normal operating position and facing the forward travel
direction.
SERVICING THE ENGINE AND DRIVE1.3
TRAIN COMPONENTS
The detail servicing and repair of the engine and
transmission 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.

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Section 1
SYMBOLS1.4
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Choke Transmission
Parking Brake
48071S
Spinning Blade
On/Start Spring Tension on Idler
Off/Stop Oil
Falling Hazard Thrown Object Hazard
Fast Slow
Continuously Variable - Linear Cutting Element - Basic Symbol
481039S
Pinch Point Cutting Element - Engage
Hour meter/Elapsed Operating Hours Cutting Element - Disengage
Keep Bystanders Away Read Operator's Manual

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Section 2
INTRODUCTION2.1
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 of the controls before operating the
mower. The owner/user can prevent and is responsible for
accidents or injuries occurring to themselves, other people
or property.
READ THIS OPERATOR’S MANUAL BEFORE
ATTEMPTING TO START YOUR MOWER.
A replacement manual is available from your authorized
Scag Service Dealer or by contacting Scag Power
Equipment, Service Department at P.O. Box 152, Mayville,
WI 53050 or contact us via the Internet at www.scag.com.
The manual for this machine can be downloaded by using
the model and serial number or use the contact form to
make your request. Please indicate the complete model
and serial number of your Scag product when requesting
replacement manuals.
SIGNAL WORDS2.2
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 on the machine 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 found on the safety decals on the
machine and throughout this manual that alerts the viewer
to the existence and relative degree of the hazard.
DANGER
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 irreparable 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.
Your safety and the safety of others depends significantly
upon your knowledge and understanding of all correct
operating practices and procedures of this machine.
BEFORE OPERATION2.3
CONSIDERATIONS
WARNING
Check all hydraulic connections for tightness.
Inspect all hydraulic hoses and / or lines to insure
they are in good condition before operating.
NEVER allow children to operate this mower. Do not1.
allow adults to operate this machine without proper
instructions.
Do not mow when children and/or others are2.
present. Keep children out of the mowing area and
in the watchful care of a responsible adult other than
the operator. Be alert and turn machine off if a child
enters the area.
SAFETY INFORMATION

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Section 2
DO NOT allow children to ride or play on the3.
machine, it is not a toy.
Clear the area to be mowed of objects that could be4.
picked up and thrown by the cutter blades.
DO NOT carry passengers.5.
DO NOT operate the machine under the influence of6.
alcohol or drugs.
If the operator(s) or mechanic(s) cannot read English7.
or Spanish, it is the owner's responsibility to explain
this material to them. A Spanish decal kit is available
for this model. See your local Scag Dealer.
DO NOT wear loose fitting clothing. Loose clothing,8.
jewelry or long hair could get tangled 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.
WARNING
Always wear hearing protection. Operating this
machine over prolonged periods of time can
cause loss of hearing.
Keep the machine and attachments in good9.
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.
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 deck drive is
disengaged and the transmission is in neutral.
The system shuts off the engine if the operator
releases the operator pressence levers with the
deck drive engaged and/or the transmission
is not in neutral. Never operate equipment
with the interlock system disconnected or
malfunctioning.
Be sure the interlock switches are functioning10.
correctly.
Fuel is flammable; handle it with care. Fill the fuel11.
tank outdoors. Never fill it indoors. Use a funnel or
spout to prevent spillage. Clean up any spillage
before starting the engine.
DO NOT add fuel to a running or hot engine. Allow12.
the engine to cool for several minutes before adding
fuel. Never fuel indoors or inside enclosed trailers.
Keep flammable objects (cigarettes, matches, etc.),13.
open flames and sparks away from the fuel tank and
fuel container. Use only approved containers.
See Section 7.4 ENGINE FUEL SYSTEM for fueling14.
procedure.
Equipment must comply with the latest requirements15.
per SAE J137 and/or ANSI/ASAE S279 when driven
on public roads.
Do not operate without the side discharge chute16.
installed and in the down position or with an optional
grass catcher or mulch plate completely installed.
Check the blade mounting bolts at frequent intervals17.
for proper tightness.
OPERATION CONSIDERATIONS2.4
Know the function of all controls and how to stop1.
quickly.
WARNING
DO NOT operate on steep slopes. ALWAYS
FOLLOW OSHA APPROVED OPERATION.
Reduce speed and exercise extreme caution on2.
slopes and in sharp turns to prevent tipping or loss
of control. Be especially cautious when changing
directions on slopes.
To prevent tipping or loss of control, start and stop3.
smoothly, avoid unnecessary turns and travel at
reduced speed.
Immediately apply the parking brake if you lose4.
steering control while operating. Inspect the machine
and correct the problem before continuing to operate.
When using any attachment, never direct the5.
discharge of material toward bystanders or allow
anyone near the machine while in operation.

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Section 2
Start the engine when the neutral latches are in6.
the neutral lock position, the cutter blades are
disengaged, parking brake is engaged and the
speed control lever is in neutral.
If the mower discharge ever plugs, shut off the7.
engine, remove the ignition key, and wait for all
movement to stop before removing the obstruction.
WARNING
DO NOT use your hand to dislodge the clogged
discharge chute. Use a stick or other device to
remove clogged material after the engine has
stopped running and the blades have stopped
turning.
Be alert for holes, rocks, roots and other hidden8.
hazards in the terrain. Keep away from any drop-
offs. Beware of overhead obstructions (low limbs,
etc.), underground obstacles (sprinklers, pipes, tree
roots, etc.). Cautiously enter a new area. Be alert for
hidden hazards.
Disengage power to cutter deck before backing up.9.
Do not mow in reverse unless absolutely necessary
and then only after observation of the entire area
behind the mower. If you must mow in reverse,
maintain a constant lookout to the rear of the
machine and mow slowly.
DO NOT turn sharply. Use care when backing up.10.
Disengage power to cutter deck before crossing11.
roads, walks or gravel drives.
Mow only in daylight or good artificial light.12.
NEVER raise the deck with the blades engaged.13.
Take all possible precautions when leaving the14.
machine unattended, such as disengaging the
mower, stopping the engine, and removing the key.
Disengage power to the attachments when15.
transporting or when not in use.
The machine and attachments should be stopped16.
and inspected for damage after striking a foreign
object, and damage should be repaired before
restarting and operating the machine.
CAUTION
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.
DANGER
DO NOT run the engine inside a building or
a confined area without proper ventilation.
Exhaust fumes are hazardous and contain
carbon monoxide which can cause brain injury
and death.
Keep hands and feet away from cutter blades and17.
moving parts. Contact can injure.
Transport the mower using a heavy duty trailer18.
or truck. Insure the trailer or truck has all of the
necessary lighting and markings as required by
laws, codes, and ordinances. Secure a trailer with a
safety chain.
Be cautious when loading and unloading onto19.
trailers or trucks. Use only a full width ramp.
When transporting the mower, make sure the speed20.
control lever is in neutral, the neutral latches are in
the neutral lock position, the engine is off with the
key removed, the parking brake is engaged and the
wheels have been blocked.
Tie the mower down securely using straps, chains,21.
cable, or ropes. Both front and rear straps must be
directed down and outward from machine.
Use care when approaching blind corners, shrubs,22.
trees, or other objects that may obscure vision.
NEVER leave the machine running unattended.23.

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Section 2
MAINTENANCE CONSIDERATIONS &2.5
STORAGE
Never make adjustments to the machine with the1.
engine running unless specifically instructed to do
so. If the engine is running, keep hands, feet, and
clothing away from moving parts.
Place the speed control lever in neutral, engage the2.
parking brake, neutral latches in the neutral lock
position, stop engine and remove key or disconnect
spark plug wire to prevent accidental starting of the
engine when servicing or adjusting the machine.
Wait for all movement to stop before adjusting,
cleaning or repairing.
Remove spark plug wire before making any repairs.3.
Keep all nuts, bolts and screws tight, to ensure the4.
machine is in safe working condition. Check blade
mounting bolts frequently to be sure they are tight.
Do not change the engine governor settings or5.
overspeed the engine. See the engine operator's
manual for information on engine settings.
To reduce fire hazard, keep the cutting units, drives,6.
muffler and engine free of grass, leaves, excessive
grease, oil and dirt.
Park the machine on level ground.7.
NEVER allow untrained personnel to service the8.
machine.
Use care when checking blades. Use a Blade Buddy,9.
wrap the blade(s) or wear gloves and USE CAUTION
when servicing blades. Only replace blades. NEVER
straighten or weld blades.
Keep all parts in good working condition. Replace all10.
worn or damaged decals.
Use jack stands to support components when11.
required.
Carefully release pressure from components with12.
stored energy.
WARNING
Hydraulic fluid is under high pressure and can
penetrate skin causing 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.
Keep body and hands away from pinholes or
nozzles that eject hydraulic fluid under high
pressure.Use paper or cardboard and not hands
to search for leaks.
Safely relieve all pressure from the hydraulic
system by placing the control levers in the neutral
lock position and shutting off the engine before
performing any work on the hydraulic system.
If you need service on your hydraulic system,
please see your authorized Scag dealer.
Let the engine cool before storing.13.
DO NOT store the machine near an open flame.14.
Shut off fuel while storing or transporting.15.
DO NOT store fuel near flames or drain indoors.16.
USING A SPARK ARRESTOR2.6
The engine in this machine is not equipped with a spark
arrestor muffler. It is in violation of California Public
Resource Code Section 4442 to use or operate this engine
on or near any forest covered, brush covered or grass
covered land unless the exhaust system is equipped with
a spark arrestor meeting any applicable local or state laws.
Other states or federal areas may have similar laws. Check
with your state or local authorities for regulations pertaining
to these requirements.
SPARK IGNITION SYSTEM2.7
This spark ignition system complies with Canadian
ICES-002.