Scag Power Equipment SW Series User manual

PART NO. 03267 Rev. 2
PRINTED 10/2010
PRINTED IN USA
© 2010
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.
OPERATOR’S
MANUAL
SW
Walk-Behind
Model: SW32-16FS
SW36A-16FS
SW36A-16FS-LE
SW48V-16FS
SW52V-18FS

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:
SW32-16FS with a serial number of F1200001 to F1299999
SW36A-16FS with a serial number of F1300001 to F1399999
SW36A-16FS-LE with a serial number of F1400001 to F1499999
SW48V-16FS with a serial number of F1500001 to F1599999
SW52V-18FS with a serial number of F1600001 to F1699999
Always use the entire serial number listed on the serial number tag when referring to this product.

I
R
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 ....................................................................................5
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 ............................................................................................................................................9
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 ........................................................................................................14
4.11 MOVING MOWER WITH ENGINE STOPPED..........................................................................................14
4.12 RECOMMENDATIONS FOR MOWING ....................................................................................................14
TROUBLESHOOTING CUTTING CONDITIONSSECTION 5 - ...............................................15

II
R
Table of Contents
ADJUSTMENTSSECTION 6 - .................................................................................................18
6.1 DRIVE CONTROL ADJUSTMENTS ..........................................................................................................18
6.2 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ............................................................................18
6.3 CUTTER DECK BELT ADJUSTMENTS ....................................................................................................18
6.4 BELT ALIGNMENT.....................................................................................................................................19
6.5 ADJUSTING CUTTING HEIGHT................................................................................................................19
6.6 ELECTRIC CLUTCH ADJUSTMENT.........................................................................................................22
MAINTENANCESECTION 7 - ..................................................................................................23
7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS ......................................................23
7.2 LUBRICATION............................................................................................................................................24
7.3 ENGINE OIL ...............................................................................................................................................26
7.4 ENGINE FUEL SYSTEM ............................................................................................................................26
7.5 ENGINE AIR CLEANER.............................................................................................................................27
7.6 CUTTER BLADES......................................................................................................................................27
7.7 TIRES..........................................................................................................................................................28
ILLUSTRATED PARTS LISTSECTION 8 - ..............................................................................29
8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES......................................................................29
32" & 36A CUTTER DECKS ............................................................................................................................30
48V & 52V CUTTER DECKS ...........................................................................................................................32
NOTES..............................................................................................................................................................34
CASTER ASSEMBLY.......................................................................................................................................35
ENGINE DECK .................................................................................................................................................36
HANDLE ASSEMBLY.......................................................................................................................................38
SW FUEL SYSTEM - EPA PHASE 2 ...............................................................................................................40
SW FUEL SYSTEM - EPA PHASE 3 ...............................................................................................................42
SW FUEL SYSTEM - C.A.R.B. TEIR 3.............................................................................................................44
INSTRUMENT PANEL......................................................................................................................................46
PEERLESS TRANSMISSION 700-070 ...........................................................................................................47
WIRE HARNESSES .........................................................................................................................................48
NOTES..............................................................................................................................................................49
REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................50
LIMITED WARRANTY - COMMERCIAL EQUIPMENT.........................Following Section 8

1
R
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 between the engine and
transmission were shown in Figure 1-1.
SERIAL NUMBER
PLATE LOCATION
R
MODEL
SERIAL
Divisionof Metalcraft of Mayville, Inc.
Mayville,Wisconsin 53050
PatentsIssued and Pending
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
seated 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.

2
R
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
Thrown Object Hazard
Keep Bystanders Away
Read Operator's Manual

3
R
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
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.
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.
SAFETY INFORMATION

4
R
Section 2
If the operator(s) or mechanic(s) cannot read English7.
or Spanish, it is the owner's responsibility to explain
this material to them.
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.
When using any attachment, never direct the4.
discharge of material toward bystanders or allow
anyone near the machine while in operation.
Start the engine when the neutral latches are in5.
the neutral lock position, the cutter blades are
disengaged, and the transmission is in neutral.
If the mower discharge ever plugs, shut off the6.
engine, remove the ignition key, and wait for all
movement to stop before removing the obstruction.

5
R
Section 2
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 hidden7.
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.8.
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.9.
Disengage power to cutter deck before crossing10.
roads, walks or gravel drives.
Mow only in daylight or good artificial light.11.
NEVER raise the deck with the blades engaged.12.
Take all possible precautions when leaving the13.
machine unattended, such as disengaging the
mower, stopping the engine, and removing the key.
Disengage power to the attachments when14.
transporting or when not in use.
The machine and attachments should be stopped15.
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 and16.
moving parts. Contact can injure.
Transport the mower using a heavy duty trailer17.
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 onto18.
trailers or trucks. Use only a full width ramp.
When transporting the mower, make sure the19.
transmission is in neutral, the neutral latches are in
the neutral lock position, the engine is off with the
key removed, and the wheels have been blocked.
Tie the mower down securely using straps, chains,20.
cable, or ropes. Both front and rear straps must be
directed down and outward from machine.
Use care when approaching blind corners, shrubs,21.
trees, or other objects that may obscure vision.
NEVER leave the machine running unattended.22.
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 transmission in neutral, neutral latches in2.
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.

6
R
Section 2
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.
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.

7
R
Section 2
SAFETY AND INSTRUCTIONAL DECALS2.8
483402
483406
2011 SW Safety Decals
Molded in Fuel Tank
WARNING
INSTALL BELT COVER BEFORE
OPERATING MACHINE
READ OPERATOR'S MANUAL
WARNING
FALLING HAZARD
USE ONLY SCAG APPROVED
RIDING ATTACHMENTS
SEE OPERATOR'S MANUAL 483404
MOUNT RIDING
ATTACHMENT
HERE
WARNING
DO NOT OPERATE WITHOUT DISCHARGE CHUTE, MULCHING
KIT, OR ENTIRE GRASS CATCHER INSTALLED
483405
WARNING
* Keep hands, feet & clothing clear
* Keep all guards in place
* Shut off engine & disengage blade
clutch before servicing
* Use caution in directing discharge
* Read instruction manual before operating
ROTATING BLADES AND BELTS
DO NOT OPERATE UNLESS GRASS
CATCHER, MULCHING KIT OR
DISCHARGE CHUTE IS INSTALLED 483406
483404
SPINNING BLADES
KEEP CLEAR
BLADE CONTACT & THROWN
OBJECTS CAN INJURE
483505
483405
483505
WARNING
Operation of this equipment
may create sparks that can
start res around dry
vegetation. A spark
arrestor may be required.
The operator should contact
local re agencies for laws
or regulations relating to
re prevention requirements.
483900
483900
(supplied with California models only)
BEFORE OPERATING
483441
*Read operator's manual
*Solicite etiquetas en espanol
a un distribuidor Scag
*Make sure guards, shields
& safety devices are in
place & working
*Clear area of children,
bystanders & debris
*Mow across face of slopes
*Trained operators only
WARNING
483441
Avoid injury from burns
- Shut off engine
- Allow to cool several minutes
- Remove cap slowly
- Do not overfill

8
R
Section 3
SPECIFICATIONS
ENGINE3.1
General Type ................................................................................................Heavy Duty Industrial/Commercial Gasoline
Brand ..................................................................................................................................................................Kawasaki
Horsepower:
(Scag Model SW32-16FS, SW36A-16FS, SW48V-16FS)....................................16 HP Kawasaki (Model # FS481V)
(Scag Model SW52V-18FS) .................................................................................18 HP Kawasaki (Model # FS541V)
Cylinders...................................................................................................................2 with Cast-Iron Sleeves - Kawasaki
Governor................................................Mechanical Type with Variable Speed Control Set At 3600 RPM (+/- 100 RPM)
Idle Speed:
Kawasaki ............................................................................................................................. 1550 RPM (+/- 150 RPM)
Fuel...................................................................................... Non-Leaded Gasoline with a Minimum Octane Rating of 87
Oil Pump...............................................................................................varies - see engine manufacturer's specifications
Starter:
Kawasaki ................................................................................................................................................ Recoil Starter
ELECTRICAL3.2
Starter...................................................................................................................... Electrical Ignition with Recoil Starter
Interlock Switches................................................Operator Presence, Mower Engagement (BBC), Transmission Neutral
Instrument Panel ................................................................................................ Key Switch, Throttle Lever, PTO Switch,
ENGINE DECK3.3
Drive System ...................................................................................... Dual Belt Drive w/5-Speed Peerless Transmission
Steering/Travel Control .................................................................................................... Clutch/Brake Fingertip Steering
Wheels:
(2) Front Caster .................................................................................................... 9 X 3.5 Flat-Free w/Roller Bearings
(2) Drive - ............................................................................... 15 x 6.5-6 Two-Ply Pneumatic Tubeless, Radius Edge
Tire Pressure:
Front Caster....................................................................................................................................................Flat-Free
Drive .................................................................................................................................................................. 12 PSI
Fuel Tank ............... 6-Gallon Seamless Polyethylene Tank with Large Opening, Fuel Cap, Fuel Gauge and Cup Holder
Travel Speed:
Forward ................................................................................................................................................. 2 up to 6 MPH
Reverse ............................................................................................................................................................. 2 MPH
-NOTE- The machine will travel at 6 mph for transport purposes. For best cutting performance the forward travel
speed should be adjusted depending upon the cutting conditions.

9
R
Section 3
CUTTER DECK3.4
Type ......................................................................................................................Out-Front design with anti-scalp rollers
Construction ...............................7-Gauge Deck Top w/10-Gauge Reinforced Spindle Area, 7-gauge (3/16") Deck Skirt.
True Cutting Width:
32 ...........................................................................................................................................................33" (81.3 cm)
36 .........................................................................................................................................................35.5" (90.2 cm)
48 ..........................................................................................................................................................48" (122.0 cm)
52 ..........................................................................................................................................................52" (132.0 cm)
Cutting Height Adjustment................................................................ Adjustment from, 1-3/4" to 4-1/4" in 1/4"increments
Cutter Blades............................................................................. 0.197 in. Thick, Milled Edge, Wear Resistant Marbain™
Blade Engagement............................................................Electric Blade Engagement Clutch with Control Panel Switch
Connected to the Cutter Deck through a Belt.
Discharge Opening............................................... Extra Wide Discharge Opening with Spring-Loaded Discharge Chute
Discharge Chute...................................................................................................Black, Polypropylene (Plastic), Flexible
Spindles............................................................................. Cast-Iron Housing, Tapered Roller Bearings with Top Access
Grease Fitting and Grease Overfill Relief Poppet
Spindle Pulleys........................................................................................................Split Steel with Tapered Locking Hub
Cutter Deck Belts...................................................................B-section with Kevlar Cord. Self-Adjusting, Self-Tightening
Electric Clutch Type ................................................................................................Ogura Heavy Duty PTO Clutch Brake
WEIGHTS AND DIMENSIONS 32 / 36A 48V 52V3.5
Length..................................................................................... 70" / 72" ............................ 76" ....................................76"
Tracking Width ........................................................................ 32" / 37" ............................ 37" ....................................37"
Overall Width w/chute down ................................................... 43" / 47" ...........................60.5"................................64.5"
Overall Width w/chute up........................................................ 33" / 37" ............................ 49" ....................................53"
Overall Height....................................................................... 40.5 / 40.5".........................40.5" ................................40.5"
Operating Weight..................................................................450# / 470# ........................ 515# ................................ 535#
PRODUCTIVITY 32 / 36 48 523.6
Cutting Width .......................................................................... 32" / 36" ............................ 48" ....................................52"
Acres Per Day..........................................................................8.3 / 9.3 ........................... 12.4.................................. 13.5
The preceding data will aid you in determining how many acres your Scag mower will cut per day. It is an estimate
based on 8 hours per day cutting time at 4 MPH with a 20% allowance for overlap and turns.

10
R
Section 4
CAUTION
Do not attempt to operate this mower unless you
have read this manual. Learn the location and
purpose of all controls and instruments before
you operate this mower.
CONTROLS AND INSTRUMENT4.1
IDENTIFICATION
Before operating the mower, familiarize yourself with all
mower and engine controls. Knowing the location, function
and operation of these controls is important for safe and
efficient operation of the mower.
Ignition Switch (Figure 4-1).1. The ignition switch
is used to start the engine. Turn the key to the on
position before pulling the recoil starter.
OPERATING INSTRUCTIONS
Mower Deck Switch (Figure 4-1).2. Used to engage
and disengage the mower drive system. Pulling up
on the switch will engage the deck drive. Pushing
down on the switch will disengage the deck drive.
Engine Choke Control (Figure 4-1).3. Used to start
a cold engine.
Engine Throttle Control (Figure 4-1).4. Used to
control the engine speed. Pushing the lever forward
increases engine speed. Pulling the lever back
decreases engine speed. Full back position is the
IDLE position. Full forward is the cutting position.
Left Steering / Brake Control (Figure 4-1).5. Used
to control the mower's left wheel when traveling
forward or reverse. Pull upward to apply brake.
Right Steering / Brake Control (Figure 4-1).6. Used
to control the mower's right wheel when traveling
forward or reverse. Pull upward to apply brake.
LEFT STEERING /
BRAKE CONTROL
IGNITION
SWITCH
MOWER
DECK
SWITCH
ENGINE
THROTTLE
CONTROL
RIGHT STEERING /
BRAKE CONTROL
NEUTRAL LATCH
NEUTRAL LATCH
OPERAT OR PRESSENCE
CONTROL
OPERAT OR PRESSENCE
CONTROL
TRANSMISSION SHIFT
LEVER
Controls and InstrumentsFigure 4-1.

11
R
Section 4
Transmission Shift Lever (Figure 4-1).7. Used to
select the forward speed or selecting reverse. The
machine must be at a complete stop before shifting
between gears or shifting between forward and
reverse.
Neutral Latch (Figure 4-1).8. Used to secure the belt
drive system in neutral. Apply neutral latches when
parking the machine.
Operator Pressence Control (Figure 4-1)9.
The operator pressence control levers must be
depressed before the transmission is shifted out of
neutral or engaging the mower deck.
SAFETY INTERLOCK SYSTEM4.2
The mower is equipped with a safety interlock system that
shuts off the engine if the operator releases the operator
presence levers with the deck drive engaged and/or the
transmission is not in neutral.Never operate equipment with
the interlock system disconnected or malfunctioning.
WARNING
Never operate the mower with the interlock
system disconnected or malfunctioning. Do not
disengage or bypass any switch; injury to yourself
and others or property damage could result.
INITIAL RUN-IN PROCEDURES4.3
FIRST DAY OF USE OR APPROXIMATELY 20 HOURS
Check all belts for proper alignment and wear at 2, 41.
and 8 hours.
Change the engine oil and oil filter after the first 202.
hours of operation. (See Section 7.4.)
Check for loose hardware. Tighten as needed.3.
Check interlock system for proper operation. (See4.
Section 4.2.)
Check tire pressure. Adjust pressure if necessary.5.
(See Section 7.10.)
STARTING THE ENGINE4.4
CAUTION
DO NOT USE STARTING FLUIDS. Use of starting
fluids in the air intake system may be potentially
explosive or cause a “runaway” engine condition
that could result in engine damage and/or
personal injury.
Be sure the fuel shutoff valve, located by the fuel1.
tank, is completely open. (See Section 7.5.)
Apply the neutral latch levers.2.
Shift the transmission into neutral.3.
Place the PTO switch in the disengaged position.4.
If the engine is cold, choke the engine as needed.5.
Move the engine throttle control to about half engine6.
speed.
Turn the ignition key to the ON position.7.
Pull the recoil starter on the engine.8.
Allow engine to warm before operating the mower.9.
GROUND TRAVEL AND STEERING4.5
- IMPORTANT -
If you are not familiar with the operation of a walk
behind mower with a transmission, the steering
and ground speed operations should be learned
and practiced in an open area, away from buildings,
fences, or obstructions.
Learn the operation on flat ground before operating
on slopes.
Start practicing with a slow engine speed and slow
forward travel.
Learn to feather the steering controls to obtain a
smooth operating action.
Practice operating the mower until you are
comfortable with the controls before proceeding
to mow.

12
R
Section 4
FORWARD TRAVEL
To travel forward with the mower, select the desired speed
using the transmission shift lever, pull steering / brake
control levers upward, release the neutral latch for both
sides and slowly release both the left and right steering /
brake control levers.The higher the gear selected using the
transmission shift lever, the faster the machine will travel.
To stop the forward travel, pull upward on the steering /
brake control levers, lock the neutral latches and shift the
transmission into neutral.
To steer the mower left while traveling forward, pull upward
on the left steering / brake control lever.The further the lever
is pulled upward, the quicker the mower will turn left.
To steer the mower right while traveling forward, pull upward
on the right steering / brake control lever. The further the
lever is pulled upward, the quicker the mower will turn
right.
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.
- NOTE -
Smooth operation of the steering / brake control
levers will produce smooth mower operation.While
learning the operation of the steering controls,
keep the travel speed low.
REVERSE TRAVEL
CAUTION
Disengage power to the mower before backing
up. Do not mow in reverse unless absolutely
necessary and then only after observation of the
entire area behind the mower.
CAUTION
Before backing up, observe the rear for persons
and obstructions. Clear the area before backing
up. Possible injury or property damage could
occur.
To travel in reverse, select the reverse gear using the
transmission shift lever, pull steering / brake control levers
upward, release the neutral latch for both sides and slowly
release both the left and right steering / brake control levers.
Keep the travel speed low while traveling in reverse.
- NOTE -
The mower may not travel straight in reverse.
To steer left while traveling in reverse, pull upward on the
left steering / brake control lever. The further the lever is
pulled upward, the quicker the mower will turn left.
To steer right while traveling in reverse, pull upward on the
right steering / brake control lever. The further the lever is
pulled upward, the quicker the mower will turn right.
To stop the reverse travel, pull upward on the steering /
brake control levers, lock the neutral latches and shift the
transmission into neutral.
ENGAGING THE DECK DRIVE (CUTTER4.6
BLADES)
Set the throttle at about 3/4 speed. Do not attempt to1.
engage the deck drive at high speed as this shortens
the electric clutch life — use only moderate engine
speed when engaging the deck drive.
Engage the deck drive by pulling out on the yellow2.
switch, located on the instrument panel, to the
engage position. See Figure 4-2.

13
R
Section 4
390S0138
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE
Cutter Engage SwitchFigure 4-2.
- NOTE -
A squealing noise may be heard when engaging
or disengaging the deck drive. It is caused by the
electric clutch plates meshing as the mower comes
up to speed. This is normal.
To disengage the deck drive, push the switch in to3.
the disengage position.
Always operate the engine at full throttle to properly4.
maintain cutting speed. If the engine starts to lug
down, reduce the forward speed and allow the
engine to operate at maximum RPM.
HILLSIDE OPERATION4.7
WARNING
DO NOT operate on steep slopes. ALWAYS
FOLLOW OSHA APPROVED OPERATION.
This mower has been designed for good traction and1.
stability under normal mowing conditions. However,
caution must be used when traveling on slopes,
especially when the grass is wet. Wet grass reduces
traction and steering control.
To prevent tipping or loss of control, do not start or2.
stop suddenly, avoid unnecessary turns and travel
at reduced speed. If tires lose traction, disengage
blades and proceed slowly off the slope.
Avoid sudden starts when mowing on slopes.3.
Travel across the slope whenever possible. Never up4.
and down the slope.
Keep tires properly inflated.5.
PARKING THE MOWER4.8
Park the machine on a flat, level surface only. Do not1.
park the machine on an incline.
Disengage the cutter blades.2.
Lock the neutral latches and shift the transmission3.
into the neutral position.
Slow the engine to idle speed.4.
Turn the ignition key to the OFF position and remove5.
the key.
AFTER OPERATION4.9
Wash the entire mower after each use. Do not1.
use high pressure spray or direct the spray onto
electrical components.
- IMPORTANT -
Do not wash a hot or running engine. Cold water
will damage the engine. Use compressed air to
clean the engine if it is hot.
Keep the entire mower clean to inhibit serious heat2.
damage to the engine or hydraulic oil circuit.
Check the drive belts for proper alignment and any3.
signs of wear. Correct and adjust if necessary.
DANGER
To avoid injury from burns, allow the mower
to cool before removing the fuel tank cap and
refueling.
After the mower has cooled down, fill the fuel tank4.
with fresh, clean fuel at the end of every day of
operation. See Engine Owner's Manual for proper
octane requirements.
Check the tire pressure. Adjust pressure if5.
necessary.

14
R
Section 4
REMOVING CLOGGED MATERIAL4.10
DANGER
ROTATING BLADES
NEVER PUTYOUR HANDS INTOTHE DISCHARGE
CHUTE FOR ANY REASON!
Shut off the engine and remove the key and
only then use a stick or similar object to remove
material if clogging has occurred.
If the discharge chute becomes clogged, shut off1.
the engine and remove the ignition key. Using a stick
or similar item, dislodge the clogged material. Then
resume normal mowing.
MOVING MOWER WITH ENGINE4.11
STOPPED
To “free-wheel” or move the mower around without the
engine running, engage the neutral latches, shift the
transmission to neutral and move the mower by hand.
RECOMMENDATIONS FOR MOWING4.12
Do not mow with dull blades. A dull blade will tear1.
grass, resulting in poor lawn appearance and
reduced mowing power.
WARNING
DO NOT operate without Discharge Chute,
Mulching Kit, or entire Grass Catcher properly
installed.
The discharge chute must not be removed and2.
must be kept in the lowest position to deflect grass
clippings and thrown objects downward. Direct the
side discharge away from sidewalks or streets to
minimize cleanup of clippings. When mowing close
to obstacles, direct the discharge away from the
obstacles to reduce the chance of property damage
by thrown objects.
Cut grass when it is dry and not too tall. Do not cut3.
grass too short (cut off 1/3 or less of existing grass
for best appearance). Mow frequently.
Keep mower and discharge chute clean.4.
When mowing wet or tall grass, mow the grass twice.5.
Raise the mower to the highest setting for the first
pass and then make a second pass to the desired
height.
Use a slow travel speed for trimming purposes.6.
Operate the engine at full throttle for best cutting.7.
Mowing with a lower RPM causes the mower to tear
the grass. The engine is designed to be operated at
full speed.
Use the alternate stripe pattern for best lawn8.
appearance. Vary the direction of the stripe each
time the grass is mowed to avoid wear patterns in
the grass.

15
R
Section 5
CONDITION CAUSE CURE
STRINGERS - OCCASIONAL
BLADES OF UNCUT GRASS
Width of Deck
SGB020
Low engine RPM Run engine at full RPM
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 tension
STREAKING - STRIPS OF
UNCUT GRASS IN CUTTING
PATH
Width of Deck
SGB018
Dull, worn blades Sharpen blades
Incorrect blade sharpening Sharpen blades
Low engine RPM Run engine at full 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
STREAKING - STRIPS OF
UNCUT GRASS BETWEEN
CUTTING PATHS
Width
of
Deck
Width
of
Deck
SGB019
Not enough overlapping between rows Increase the overlap of each pass
TROUBLESHOOTING CUTTING CONDITIONS

16
R
Section 5
CONDITION CAUSE CURE
U N E V E N C U T O N F L AT
GROUND - WAVY HIGH-LOW
APPEARANCE, SCALLOPED
CUT, OR ROUGH CONTOUR
Width of Deck
SGB020
Lift worn from blade Replace blade
Blade upside down Mount with cutting edge toward ground
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-WAVY APPEARANCE,
HIGH-LOW SCALLOPED CUT,
OR ROUGH CONTOUR
Width of Deck
SGB021
Uneven ground
May need to reduce ground speed, raise
cutting height, and/or change direction
of cut
SLOPING RIDGE ACROSS
WIDTH OF CUTTING PATH
Width of Deck
SGB023
Tire pressures not equal Check and adjust tire pressure
Wheels uneven Check and adjust tire pressure
Deck mounted incorrectly See your authorized SCAG dealer
Deck not level side-to side Check for level and correct
TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)