PART NO. 03226 Rev. 2
PRINTED 1/2009
PRINTED IN USA
© 2009
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 efciency. The specic models that
this book covers are listed on the inside cover. Before operating your machine,
please read all the information enclosed.
SWZ
Walk-Behind
Model: SWZ36A-16KAI
SWZ36A-17KAI
SWZ48V-17KAI
SWZ52V-17KAI
SWZ52V-19KAI
SWZ-19KAI
SWZ-21KAE
OPERA TOR’S
MANUAL
W ARNING
F AILURE T O FOLLOW SAFE OPERA TING PRACTICES MA Y RESUL T
IN SERIOUS INJUR Y OR DEA TH.
Read this manual completely as well as other manuals that came with your mo wer.•
AL WA YS FOLLOW OSHA APPROVED OPERA TION.•
DO NOT operate on steep slopes . •
Always tra vel across slopes.•
DO NOT mow on w et grass. Wet gr ass reduces traction and steering control.•
Keep all shields in place, especially the g rass discharge chute.•
Before perf or ming 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, f eet and clothing awa y from power-driven parts.•
Keep others off the mow• er (only one person at a time)
REMEMBER - YOUR MO WER IS ONL Y AS SAFE AS THE OPERA TOR!
HAzARD CONTROL AND ACCIDENT PREvENTION ARE DEPENDENT UPON THE AW ARENESS,
CON CE RN , P RUD EN CE , AN D PRO PE R T RAI NI NG O F T HE P ER SON NE L IN vOL vE D IN TH E
OPERA TION, TRANSPORT , MAINTENANCE, AND STORA GE OF THE EqUIPMENT .
This manual covers the operating instructions and illustrated parts list for:
SWz36A-16KAI with a serial number of D4500001 to D4599999
SWz36A-17KAI with a serial number of E6100001 to E6199999
SWz48v -17KAI with a serial number of D4600001 to D4699999
SWz52v -17KAI with a serial number of D4700001 to D4799999
SWz52v -19KAI with a serial number of D4800001 to D4899999
SWz-19KAI with a serial number of D5100001 to D5199999
SWz-21KAE with a serial number of D5200001 to D5299999
SWM-52v with a serial number of D5400001 to D5499999
SWM-61v with a serial number of D5500001 to D5599999
Always use the entire serial number listed on the serial number tag when ref erring to this product.
I
T able of Contents
T able of Contents
GENERAL INFORMA TION SECTION 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 INFORMA TION SECTION 2 - ......................................................................................3
2.1 INTRODUCTION ........................................................................................................................................... 3
2.2 SIGNAL WORDS .......................................................................................................................................... 3
2.3 BEFORE OPERA TION CONSIDERA TIONS ................................................................................................ 3
2.4 OPERA TION CONSIDERA TIONS ................................................................................................................ 4
2.5 MAINTENANCE CONSIDERA TIONS & STORA GE ....................................................................................5
2.6 USING A SP ARK ARRESTOR .....................................................................................................................6
2.7 SAFETY AND INSTRUCTIONAL DECALS
................................................................................................. 7
SPECIFICA TIONS SECTION 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
OPERA TING INSTRUCTIONS SECTION 4 - ...........................................................................10
4.1 CONTROLS AND INSTRUMENT IDENTIFICA TION ................................................................................ 10
4.2 SAFETY INTERLOCK SYSTEM ................................................................................................................ 11
4.3 INITIAL RUN-IN PROCEDURES ................................................................................................................ 11
4.4 ST ARTING THE ENGINE ........................................................................................................................... 11
4.5 GROUND TRA vEL AND STEERING .........................................................................................................11
4.6 ENGAGING THE DECK DRIvE (CUTTER BLADES) ................................................................................ 12
4.7 HILLSIDE OPERA TION ..............................................................................................................................13
4.8 P ARKING THE MOWER ............................................................................................................................. 13
4.9 AFTER OPERA TION .................................................................................................................................. 13
4.10 REMOvING CLOGGED MA TERIAL ........................................................................................................ 13
4.11 MOvING MO WER WITH ENGINE STOPPED .......................................................................................... 14
4.12 RECOMMENDA TIONS FOR MO WING .................................................................................................... 14
TROUBLESHOO TING CUTTING CONDITIONS SECTION 5 - ...............................................15
II
T able of Contents
ADJUSTMENTS SECTION 6 - .................................................................................................18
6.1 P ARKING BRAKE ADJUSTMENT ............................................................................................................ 18
6.2 NEUTRAL ADJUSTMENT .........................................................................................................................18
6.3 STEERING CONTROL ROD ADJUSTMENTS .......................................................................................... 18
6.4 TRACKING ADJUSTMENT ........................................................................................................................ 19
6.5 THROTTLE CONTR OL AND CHOKE ADJUSTMENTS ............................................................................ 19
6.6 CUTTER DECK BEL T ADJUSTMENTS ....................................................................................................19
6.7 BEL T ALIGNMENT .....................................................................................................................................20
6.8 ADJUSTING CUTTING HEIGHT ................................................................................................................20
6.9 ELECTRIC CLUTCH ADJUSTMENT .........................................................................................................23
MAINTENANCE SECTION 7 - .................................................................................................. 24
7.1 MAINTENANCE CHART - RECOMMENDED SER vICE INTERv ALS ......................................................24
7.2 LUBRICA TION ............................................................................................................................................25
7.3 HYDRAULIC SYSTEM ............................................................................................................................... 27
7.4 ENGINE OIL ............................................................................................................................................... 28
7.5 ENGINE FUEL SYSTEM ............................................................................................................................ 28
7.6 ENGINE AIR CLEANER .............................................................................................................................29
7.7 BA TTERY - ELECTRIC ST ART MODELS.................................................................................................. 29
7.8 CUTTER BLADES ......................................................................................................................................30
7.9 TIRES .......................................................................................................................................................... 31
ILLUSTRA TED P ARTS LIST SECTION 8 - ..............................................................................32
8.1 SCAG APPR OvED A TT ACHMENTS AND ACCESSORIES. ..................................................................... 32
CASTER ASSEMBL Y .......................................................................................................................................33
36A CUTTER DECK .........................................................................................................................................34
48v & 52v CUTTER DECKS ........................................................................................................................... 36
61v CUTTER DECK ......................................................................................................................................... 38
ENGINE DECK - MANUAL ST ART ..................................................................................................................40
ENGINE DECK - ELECTRIC ST ART ...............................................................................................................42
DRIvE AND BRAKE COMPONENTS ..............................................................................................................44
HANDLE ASSEMBL Y - 16" SMALL FRAME ..................................................................................................46
HANDLE ASSEMBL Y - 20" LARGE FRAME .................................................................................................. 48
HYDRAULIC ASSEMBL Y................................................................................................................................. 50
HYDRAULIC PUMP ASSEMBL Y ..................................................................................................................... 52
WIRE HARNESSES ......................................................................................................................................... 54
WIRE HARNESSES ......................................................................................................................................... 55
WIRE HARNESSES ......................................................................................................................................... 56
REPLACEMENT DECALS AND INFORMA TION PLA TES .............................................................................57
LIMITED WARRANTY - COMMERCIAL Eq UIPMENT ......................... Following Section 8
1
Section 1
INTRODUCTION 1.1
Y ou r m owe r w as bu il t t o t he hi gh es t s ta nd ar d s i n t he
in d us t r y. Ho we ve r, th e p r ol o n ge d l i fe a nd ma x im u m
effi cie ncy o f your mo wer de pen ds on you fol low ing th e
oper ati ng, ma int ena nce a nd adj ust men t inst ru cti ons in
this manual.
If additional information or service is needed, conta ct your
Scag Pow er Equipment Dealer.
We encourage you to contact your dealer for repairs.
All S cag de ale rs ar e info rm ed of t he la tes t met hod s to
serv ice t his e quipmen t and provi de pr ompt and ef ficien t
serv ice i n the field or at th eir se rvi ce sho p. They c arr y a
full line of Scag service par ts.
- IMPORT ANT -
The replacement of any part on this product
by other than the manufacturer's authorized
rep lac eme nt par t m ay a dve rsel y a ffec t t he
pe r fo r m an c e , du r ab i l it y o r sa fe t y o f th i s
product.
Use of other than original Scag replacement
parts will void the warranty .
When or der ing pa rt s, always gi ve t he mod el and se ria l
number of y our mower. Th e serial number plate is located
on t he fra me of t he mac hi ne bet we en t he en gin e a nd
transmission were 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 Location Figure 1-1.
GENERAL INFORMA TION
USE ONL Y SCAG APPR OvED A TT ACHMENTS AND
ACCESSORIES.
Attachm ents and accessorie s manuf actured by co mpanies
other tha n Sc ag Power Equip ment are not appr oved for
use on this machine. See Section 8-1.
W ARNING
For pictorial clari ty, s ome il lustrations and figures
in this manual may show shield s, guards or plates
open or remo ved. Unde r no ci rcumstan ces should
your mower be operated without these devices
in place.
All in formation i s based u pon product informatio n avai lable
at the time of app roval f or printing. Scag Power Equipment
reser ves the ri ght to make cha nges at any time wi thou t
notice and without incurring any obligation.
DIRECTION REFERENCE 1.2
The “Right” and “Left ”, “Front” and “Rear” of the machine
are referen ced fro m the operator’s r ight an d left when in
the normal operating posi tion and f acing the f orward tr avel
direction.
SERvICING THE ENGINE AND DRIvE 1.3
TRAIN COMPONENTS
T he d e t a i l s e r v i c i n g a n d r e p a i r o f t h e en g i n e a n d
transmission are not covered in this manual; only routine
ma i n t e n a n c e an d g e n e r al s e r v i c e i n s t r u c ti o n s a r e
pro vid ed . For s er vi ce o f th es e co mpo ne nts dur in g th e
lim it ed wa rra nt y pe ri od, it i s im por t an t to c on tac t yo ur
Sca g de ale r or f in d a lo ca l aut ho ri zed s er vi cin g ag en t
of the component manufacturer. Any u nauth orized wor k
done o n the se com pon ent s dur ing t he war rant y per iod
may void y our warranty .
2
Section 1
SYMBOLS 1.4
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Choke
T ransmission
Parking Brake
Spinning Blade
On/Start
Spring T ension on Idler
Off/Stop
Oil
Falling Hazard
Thrown Object Hazard
Fast
Slow
Continuously V ariable - Linear
Cutting Element - Basic Symbol
Pinch Point
Cutting Element - Engage
Hour meter/Elapsed Operating Hours
Cutting Element - Disengage
STT MODELS
Seat must be installed under the seat
hold down bracket during installation.
Failure to secure the seat under the hold
down bracket could result in serious
injury or death in a roll over.
CE Mark
Thrown Object Hazard
Keep Bystanders A way
Read Operator's Manual
3
Section 2
INTRODUCTION 2.1
Y our mower is only as safe as the operator. Carelessness
or op er at or e rr or m ay r es ul t in se r io us b od il y i nj ur y
or death. H azar d co ntro l an d ac cid ent preventi on a re
dependent upon the awareness, concern, prudence, and
proper training of the personnel involv ed in the operation,
transport, maintenance and stor age of the equipment. Ma ke
sure every op erator is proper ly trained and thoro ughly
fam il ia r w it h all o f the c on tr ols b efo re o pe rat in g the
mower . The owner/user can prevent and is responsib le for
accidents or injuries occurring to themselv es, other people
or property.
R E A D T H I S O P E R AT O R ’ S MA N U A L BE F O R E
A TTEMPTING TO ST ART Y OUR MOWER.
A replacement manual is available from your authorized
Sc a g Se r v ic e D e al e r or b y co n ta c ti n g Sc a g Pow er
Equipment, Ser vice Department at P .O. Bo x 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 ser ial 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 WORDS 2.2
This symbol means “Attention! Become Alert! Your
Safety is In volved!" The symbol is used with the f ollowing
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
impor tant infor mation ab out safety. T o avoid injur y and
possible death, careful ly 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.
D ANGER
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.
W ARNING
The signal w ord “W ARNING” denotes that a hazard e xists
on or near the machine that can result in injury or death if
proper precautions are not taken.
CA UTION
The signal word “CA UTION” is a reminder of safety practices
on or near the machine that could result in personal injury
if proper precautions are not taken.
Y our safety and the safety of others depends significantly
upon your kn owledge an d underst anding of all corre ct
operating practices and procedures of this machine.
BEFORE OPERA TION 2.3
CONSIDERA TIONS
NEVER allow children to operate this mower . Do not 1.
allow adults to operate this machine without proper
instructions.
Do not mow when children and/or others are 2.
present. K eep 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 pla y on the 3.
machine, it is not a toy .
Clear the area to be mowed of objects that could be 4.
picked up and thrown b y the cutter blades.
DO NOT carry passengers. 5.
DO NOT operate the machine under the influence of 6.
alcohol or drugs.
SAFETY INFORMA TION
4
Section 2
If the operator(s) or mechanic(s) cannot read English 7.
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 protectiv e clothing including
long pants. Wearing safety glasses , safety shoes and
a helmet is advisable and is required by some local
ordinances and insurance regulations.
W ARNING
Always wear hearing protection. Operating this
mach ine ove r p rolo ng ed peri ods of tim e c an
cause loss of hearing.
Keep the machine and attachments in good 9.
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 bef ore
operating the machine.
W ARNING
This machine is equipped wit h an interlo ck system
intended to protect the operator and others fr om
injury. This is acc omplished by preventi ng the
engin e from start ing u nless the deck dri ve is
disengaged and the transmission is in neutral.
The system shuts off the engine if the operator
releases the operator pressence levers with the
dec k d ri ve eng ag ed and /o r t he tr an sm iss io n
is no t i n n e ut r a l. Ne v er op e ra t e e q ui p m en t
wi t h t h e in t er l o ck sy s t e m d is c o n ne c t e d o r
malfunctioning.
Be sure the interlock switches are functioning
10.
correctly .
Fuel is flammable; handle it with care. Fill the fuel 11.
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. Allow 12.
the engine to cool for sev eral minutes before adding
fuel. Ne ver 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.
Equipment must comply with the latest requirements 14.
per SAE J137 and/or ANSI/ASAE S279 when driven
on public roads.
Do not operate without the side discharge chute 15.
installed and in the down position or with an optional
grass catcher or mulch plate completely installed.
Check the blade mounting bolts at frequent intervals 16.
for proper tightness.
OPERA TION CONSIDERA TIONS 2.4
Know the function of all controls and how to stop 1.
quickly .
W ARNING
DO NOT o p e ra t e on st e ep sl o pe s . A LWAYS
FOLLOW OSHA APPR OvED OPERA TION.
Reduce speed and exercise e xtreme caution on 2.
slopes and in sharp turns to prevent tipping or loss
of control. Be especially cautious when changing
directions on slopes.
T o prevent tipping or loss of control, start and stop 3.
smoothly , avoid unnecessary turns and travel at
reduced speed.
When using any attachment, nev er direct the 4.
discharge of material toward bystanders or allow
anyone near the machine while in operation.
Start the engine when the neutral latches are in 5.
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 ev er plugs, shut off the 6.
engine, remove the ignition k ey , and wait for all
movement to stop bef ore removing the obstruction.
5
Section 2
W ARNING
DO NOT use your hand to dislodge the clogged
discharge chute. Use a stick or other device to
remove cl ogged materia l afte r the e ngine has
stopped running and the blad es have stopped
turning.
Be alert for holes, rocks, roots and other hidden 7.
hazards in the terrain. Keep away from an y 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 bef ore backing up. 8.
Do not mow in rev erse unless absolutely necessar y
and then only after observation of the entire area
behind the mower . If you must mo w 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 bef ore crossing 10.
roads, walks or gra vel drives.
Mow only in daylight or good artificial light. 11.
NEVER raise the deck with the blades engaged. 12.
T ake all possible precautions when lea ving the 13.
machine unattended, such as disengaging the
mower , stopping the engine, and removing the key .
Disengage power to the attachments when 14.
transporting or when not in use.
The machine and attachments should be stopped 15.
and inspected for damage after striking a foreign
object, and damage should be repaired before
restarting and operating the machine.
CA UTION
Do not touch the engine or the muffler while the
engine is running or immediately after stopping.
Th es e a re as m ay be h ot e no ug h to cau se a
burn.
D ANGER
DO NOT run t he eng in e ins id e a bu il di ng or
a confined area without proper ventilation.
Ex h a u st fu m e s a r e h a z a rd o us an d co n t ai n
carbon monoxide which can cause brain injury
and death.
Keep hands and f eet away from cutter blades and 16.
moving parts. Contact can injure.
T ransport the mower using a heavy duty trailer 17.
or truck. Insure the tr ailer 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 onto 18.
trailers or trucks. Use only a full width ramp.
When transporting the mower, make sure the speed 19.
control lever is in neutral, the neutr al latches are in
the neutral lock position, the engine is off with the
key remov ed, the parking brake is engaged and the
wheels have been bloc ked.
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 CONSIDERA TIONS & 2.5
STORA GE
Never mak e adjustments to the machine with the 1.
engine running unless specifically instructed to do
so. If the engine is running, keep hands, feet, and
clothing away from mo ving par ts.
Place the speed control lever in neutral, engage the 2.
parking brake, neutral latches in the neutral loc k
position, stop engine and remove ke y or disconnect
spark plug wire to prevent accidental starting of the
engine when servicing or adjusting the machine.
Wait f or all movement to stop before adjusting,
cleaning or repairing.
6
Section 2
Remove spark plug wire before making an y repairs. 3.
Keep all nuts, bolts and scre ws tight, to ensure the 4.
machine is in safe working condition. Check blade
mounting bolts frequently to be sure they are tight.
Do not change the engine governor settings or
5.
overspeed the engine. See the engine operator's
manual for inf or mation on engine settings.
T o reduce fire hazard, keep the cutting units, drives , 6.
muffler and engine free of grass, leav es, excessive
grease, oil and dirt.
Park the machine on lev el ground. 7.
NEVER allow untrained personnel to service the 8.
machine.
Use care when checking blades. Use a Blade Buddy ,
9.
wrap the blade(s) or wear glo ves and USE CAUTION
when servicing blades. Only replace b lades. NEVER
straighten or weld blades.
Keep all parts in good working condition. Replace all
10.
worn or damaged decals.
Use jack stands to support components when 11.
required.
Carefully release pressure from components with 12.
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 SP ARK ARRESTOR 2.6
The engine in this machine is not equipped with a spark
arr es to r m uf fle r. It is in vio la tio n of Cal ifo rn ia Pu bli c
Resource Code Section 4442 to use or operat e 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 feder al areas may have similar laws. Chec k
with your state or local authorities for regulations pertaining
to these requirements.
7
Section 2
SAFETY AND INSTRUCTIONAL DECALS 2.7
483402
483406
Molded in Fuel T ank
!
Avoid injury from burns.
Shut off engine before
removing fuel tank cap.
W ARNING
INST ALL BEL T COvER BEFORE
OPERA TING MACHINE
READ OPERATO R'S MANUAL
WARNING
FALLING HAzARD
USE ONLY SCAG APPROvED
RIDING ATTACHMENTS
SEE OPERATOR'S MANUAL
483404
MOUNT RIDING
ATTACHMENT
HERE
WARN IN G
DO NOT OPERA TE WITHOUT DISCHARGE CHUTE, MULCHING
KIT, OR ENTIRE GRASS CA TCHER INSTALLED
483405
WARN IN G
* Keep hands, feet & clothing c lear
* 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 BEL TS
DO NOT OPERA TE UNLESS GRASS
CA TCHER, MULCHING KIT OR
DISCHARGE CHUTE IS INST ALLED
483406
483404
SPINNING BLADES
KEEP CLEAR
BLADE CONT ACT & THROW N
OBJECTS CAN INJURE
483505
483405
483505
WARN IN G
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)
CAUTION
8
Section 3
SPECIFICA TIONS
ENGINE 3.1
General T ype ................................................................................................Heavy Duty Industrial/Commercial Gasoline
Brand .................................................................................................................................................................. Kawasaki
Horsepower:
(Scag Model SWZ36A-16KAI) ................................................................................. 16 HP (Spec. # FH480V -BS24-R)
(Scag Model SWZ36A-17KAI, SWZ48V -17KAI, SWZ52V-17KAI) ........................... 17 HP (Spec.# FH541V -BS38-R)
(Scag Model SWZ52V -19KAI, SWZ-19KAI) ............................................................. 19 HP (Spec.# FH580V-BS34-R)
(Scag Model SWZ-21KAE) ......................................................................................21 HP (Spec. # FH641V -GS06-R)
Cylinders ................................................................................................................... 2 with Cast-Iron Sleeves - Kawasaki
Governor ................................................ Mechanical T ype with V ariable 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
ELECTRICAL 3.2
Starter ...................................................................................................................... Electrical Ignition with Recoil Star ter
Interlock Switches ................................................Operator Presence, Mower Engagement (BBC), T ransmission Neutral
Instrument Panel ................................................................................................ Key Switch, Throttle Lever , PTO Switch,
ENGINE DECK 3.3
Drive System .... Hydraulic Drive with T wo V ariable Displacement Pumps and T wo Cast-Iron High T orque Wheel Motors
Hydraulic Pumps ............................................................. T wo Hydro-Gear model PG Series 10 cc. Hydraulic Pumps
with Dump V alves f or movement without the engine running
Hydraulic Drive Motors ........................................... Two P arker Model TE Series 12 cu. inch Cast-Iron Wheel Motors
Steering/T ravel Control ..........................................Independent Handle Controls for each wheel, squeeze to move from
forward to neutral to re verse, neutral lock le ver, speed range controlled
with single le ver (patented design), in-field tracking adjustment with tool provided
Parking Brake ............................................................................................... 7.5" Dr um, Band Brake, one on each wheel
Wheels:
(2) Front Caster .................................................................................................... 9 X 3.5 Flat-Free w/Roller Bearings
(2) Drive - .............................................................................. 16 x 6.5-8 Four-Ply Pneumatic T ubeless, Radius Edge
Tire Pressure:
Front Caster....................................................................................................................................................Flat-F ree
Drive .................................................................................................................................................................. 12 PSI
Fuel T ank ........................................................ 6-Gallon Seamless Poly ethylene T ank with Large Opening and Fuel Cap
T ravel Speed:
Forward ..................................................................................................................................................... 0 - 7.4 MPH
Reverse ..................................................................................................................................................... 0 - 3.0 MPH
-NOTE- The machine will travel at 7.4 mph for tr anspor t purposes. For best cutting perf ormance the forward travel
speed should be adjusted depending upon the cutting conditions.
9
Section 3
CUTTER DECK 3.4
T ype ...................................................................................................................... Out-Front design with anti-scalp rollers
Construction ................ 36 / 48 = 7-Gauge Deck T op w/10-Gauge Reinforced Spindle Area, 7-gauge (3/16") Dec k Skir t
52 / 61 = 10-Gauge Deck T op w/10-Gauge Reinforced Spindle Area, 7-Gauge (3/16") Deck Skirt
T rue Cutting Width:
36 .........................................................................................................................................................35.5" (90.2 cm)
48 ..........................................................................................................................................................48" (122.0 cm)
52 ..........................................................................................................................................................52" (132.0 cm)
61 ..........................................................................................................................................................61" (155.0 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, W ear 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, Polyprop ylene (Plastic), Flexible
Spindles ............................................................................. Cast-Iron Housing, T apered Roller Bearings with T op Access
Grease Fitting and Grease Overfill Relief P oppet
Spindle Pulleys ........................................................................................................ Split Steel with T apered Locking Hub
Cutter Deck Belts ................................................................................................................... B-section with Kevlar Cords
Electric Clutch T ype ................................................................................................Ogura Heavy Duty PTO Clutch Brak e
WEIGHTS AND DIMENSIONS 36A / 48v 52v 61v 3.5
Length..................................................................................... 72" / 76" ............................ 76" ....................................78"
T racking Width ........................................................................ 37" / 37" ............................ 37"* ....................................41"
Overall Width w/chute down ..................................................47" / 60.5" .......................... 64.5" ................................73.5"
Overall Width w/chute up ........................................................ 37" / 49" ............................ 53" ....................................62"
Overall Height ...................................................................... 40.5" / 40.5" ........................ 40.5" ................................. 40.5
Operating W eight .................................................................. 515# / 565# ....................... 585#* ............................... 717#
PRODUCTIvITY 36 / 48 52 61 3.6
Cutting Width .......................................................................... 36" / 48" ............................ 52" ....................................61"
Acres Per Da y .........................................................................9.3 / 12.4 .......................... 13.5 .................................. 15.8
The preceding chart will aid you in determining how many acres your Scag mower will cut per day . The chart is an
estimate based on 8 hours per day cutting time at 4 MPH with a 20% allowance f or overlap and turns.
* Large Frame = T racking Width - 41", Weight - 605#
10
Section 4
CA UTION
Do not attempt to operate this mower unless you
have read this manual. Learn the loca tion and
purpose of all controls and instruments before
you operate this mower .
CONTROLS AND INSTRUMENT 4.1
IDENTIFICA TION
Before operating the mower, familiarize yourself with all
mower and engine controls. Knowing the location, function
and operation of these controls is impor tant for safe and
efficient operation of the mower .
Ignition Switch (Figure 4-1). 1. The ignition s witch
is used to start the engine. T urn the key to the on
position before pulling the recoil starter.
OPERA TING 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 driv e.
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 le ver forward
increases engine speed. Pulling the le ver back
decreases engine speed. Full bac k position is the
IDLE position. Full f orward is the cutting position.
Left Steering Control (Figure 4-1). 5. Used to control
the mower's left wheel when trav eling forward or
reverse . Pull upward for neutr al and reverse.
Right Steering Control (Figure 4-1). 6. Used to
control the mower's right wheel when traveling
forward or re verse. Pull upw ard for neutral and
reverse .
LEFT STEERING
CONTROL
IGNITION
SWITCH
MOWER
DECK
SWITCH
ENGINE
THRO TTLE
CONTROL
RIGHT STEERING
CONTRO L
NEUTRAL LATCH
NEUTRAL LATCH
OPERAT OR PRESSENCE
CONTRO L
OPERAT OR PRESSENCE
CONTROL
BRAKE LEVER
SPEED CONTRO L
LEVER
ENGINE CHOKE
CONTROL
Controls and Instruments Figure 4-1.
11
Section 4
Speed Control Lever (Figure 4-1). 7. Used to select
the forward speed.
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 m ust be
depressed before the transmission is shifted out of
neutral or engaging the mower deck.
Parking Brake Lever (Figure 4-1) 10. Used to engage
and disengage the parking brake. Pull the lever back
to engage the parking brake. Push the lever forw ard
to disengage the parking brake.
SAFETY INTERLOCK SYSTEM 4.2
The mower is equipped with a saf ety interlock system that
shuts off the engine if the operator releases the operator
presence levers with the deck drive engaged and/or the
speed control lever not i n neutral or the pa rking brake
disengaged. Never operate equipment with the interlock
system disconnected or malfunctioning..
W ARNING
Nev e r op er at e th e mow er w i th t he i n te rl oc k
system disconnected or malfunctioning. Do not
diseng age or bypass any s witch; in jury to yourse lf
and others or property damage could result.
INITIAL RUN-IN PROCEDURES 4.3
FIRST DA Y OF USE OR APPROxIMA TEL Y 20 HOURS
Check all belts for proper alignment and wear at 2, 4 1.
and 8 hours.
Change the engine oil and oil filter after the first 20
2.
hours of operation. (See Section 7.4.)
Check for loose hardware . Tighten as needed. 3.
Check interlock system for proper operation. (See 4.
Section 4.2.)
Check tire pressure. Adjust pressure if necessary. 5.
(See Section 7.10.)
ST ARTING THE ENGINE 4.4
CA UTION
DO NOT USE ST ARTING FLUIDS. Use of starting
fluids in the air intake system may be potentially
explosive or cause a “runaway” engine condition
th a t c o u ld re s u l t i n en g i n e d am a g e a n d /o r
personal injury .
Be sure the fuel shutoff valve, located b y the fuel 1.
tank, is completely open. (See Section 7.5.)
Apply the neutral latch levers . 2.
Shift the speed control lever into neutral. 3.
Place the PTO s witch in the disengaged position. 4.
Apply the parking brake. 5.
If the engine is cold, choke the engine as needed. 6.
Move the engine throttle control to about half engine 7.
speed.
T urn the ignition key to the ON position. 8.
Pull the recoil starter on the engine. 9.
Allow engine to warm before operating the mow er. 10.
GROUND TRA vEL AND STEERING 4.5
- IMPORT ANT -
If you are not f amiliar with the operation of a walk
behind mower wit h a hydrostatic transmission, the
steering and ground speed operations should be
learned and pr acticed in an open area, away from
buildings, fences , or obstructions.
Learn the operati on o n fl at g round before ope rating
on slopes.
Start pr acticing w ith a slow engine speed and slo w
forward tra vel.
Learn to feather the steering controls to obtain a
smooth operating action.
Pr a ct i c e op e ra t i ng th e m ow er un t il yo u ar e
comfortable with the controls before proceeding
to mow .
12
Section 4
FORW ARD TRA vEL
T o trav el f orward with the mower , release the parking brake ,
select the desired speed using the speed control le ver, pull
steering control levers upward, release the neutral latch
for both sides and slowly release both the left and right
steering control levers. The higher the notch sel ected using
the speed control lever , the faster the machine will trav el.
T o stop the forward travel, pull upward on the steer ing
control levers, lock the neu tral latches, sh ift the spee d
control lever into neutral and apply the parking brak e.
T o steer the mower left w hile trav eling f orward, pull upward
on the left steer ing control lever. The fur ther the lever is
pulled upward, the quicker the mo wer will turn left.
T o steer the mow er right while trav eling for ward, pull upwa rd
on the r ight steering control lever . The further the lever is
pulled upward, the quicker the mo wer will turn r ight.
- NOTE -
Smooth operation of the steering c ontrol le vers will
produce smooth mower operation. While learning
the operation of the steer ing controls, keep the
travel speed lo w.
REvERSE TRA vEL
CA UTION
Disengage power to the mower before backing
up. Do not m ow in reve rse u nles s ab sol utely
necessary and then only after observation of the
entire area behind the mower .
CA UTION
Before backing up, observe the rear for persons
and obstructions. Clear the area before backing
up. Possible injur y or propert y dam age co uld
occur.
T o travel in reverse, pull steer ing control levers upward.
Keep the tra vel speed low while traveling in re verse.
- NOTE -
The mower may not tra vel straight in reverse .
T o steer left while traveling in reverse, pull upward on the
left steering control lever. The fur ther the lever is pulled
upward, the quicker the mo wer will turn left.
T o steer right while tr aveling in reverse, pull upward on the
right steer ing control lever . The further the lever is pulled
upward, the quicker the mo wer will turn r ight.
ENGAGING THE DECK DRIvE (CUTTER 4.6
BLADES)
Set the throttle at about 3/4 speed. Do not attempt to 1.
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 y ellow 2.
switch, located on the instrument panel, to the
engage position. See Figure 4-2.
390S0138
PULL UP TO ENGAGE
PUSH DOWN TO DISENGAGE
Cutter Engage Switch Figure 4-2.
- NOTE -
A squealing noise may be heard when engaging
or disengaging the deck drive. It is caused by the
electric clut ch p lates meshing as the mower com es
up to speed. This is normal.
T o disengage the deck drive, push the s witch in to 3.
the disengage position.
Always operate the engine at full throttle to properly 4.
maintain cutting speed. If the engine starts to lug
down, reduce the forward speed and allo w the
engine to operate at maximum RPM.
13
Section 4
HILLSIDE OPERA TION 4.7
W ARNING
DO NOT o p e ra t e on st e ep sl o pe s . A LWAYS
FOLLOW OSHA APPR OvED OPERA TION.
This mower has been designed for good traction and 1.
stability under normal mowing conditions. Ho wever ,
caution must be used when traveling on slopes ,
especially when the grass is wet. Wet gr ass reduces
traction and steering control.
T o prevent tipping or loss of control, do not start or 2.
stop suddenly , avoid unnecessary turns and travel
at reduced speed. If tires lose tr action, disengage
blades and proceed slowly off the slope.
Avoid sudden starts when mowing on slopes. 3.
T ravel across the slope whene ver possible. Never up 4.
and down the slope.
Keep tires properly inflated. 5.
P ARKING THE MO WER 4.8
Park the machine on a flat, lev el surface only . Do not 1.
park the machine on an incline.
Disengage the cutter blades. 2.
Shift the speed control lever into the neutral position, 3.
lock the neutral latches and apply the parking brake.
Slow the engine to idle speed. 4.
T urn the ignition key to the OFF position and remove 5.
the key .
AFTER OPERA TION 4.9
Wash the entire mower after each use . Do not 1.
use high pressure spray or direct the spra y onto
electrical components.
- IMPORT ANT -
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 heat
2.
damage to the engine or hydraulic oil circuit.
Check the drive belts for proper alignment and an y
3.
signs of wear. Correct and adjust if necessary .
D ANGER
To avoid in jur y f rom bur ns , all ow t he mow er
to cool before removing the fuel tank cap an d
refueling.
After the mower has cooled down, fill the fuel tank 4.
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 if 5.
necessary .
REMOvING CLOGGED MA TERIAL 4.10
D ANGER
RO T A TING BLADES
NEvER PUT Y OUR HANDS INTO THE DISCHA RGE
CHUTE FOR ANY REASON!
Shu t o ff the eng ine an d r emov e t he key an d
only then use a stick or similar object to remove
material if clogging has occurred.
If the discharge chute becomes clogged, shut off
1.
the engine and remove the ignition ke y . Using a stick
or similar item, dislodge the clogged material. Then
resume normal mowing.
14
Section 4
MOvING MO WER WITH ENGINE 4.11
STOPPED
T o “free- wheel” or move the mower around withou t the
engine running, turn the dump v alve lev ers located on the
back of the pumps counter clockwise o the "freewheel"
position and m ove the mower by h and. To operate th e
mower , the dump valves must be tur ned clockwise to the
closed position.
Dump Valves Figure 4-3.
RECOMMENDA TIONS FOR MOWING 4.12
Do not mow with dull blades. A dull blade will tear 1.
grass, resulting in poor lawn appearance and
reduced mowing power .
W ARNING
DO NOT operate without Discharge Chute,
Mulching Kit, o r entire Grass Catcher properly
installed.
The discharge chute must not be removed and
2.
must be kept in the lowest position to deflect gr ass
clippings and thrown objects downward. Direct the
side discharge away from side walks or streets to
minimize cleanup of clippings. When mowing close
to obstacles, direct the discharge awa y 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 cut
3.
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, mo w 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 trav el 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 lawn 8.
appearance. V ary the direction of the stripe each
time the grass is mowed to av oid wear patterns in
the grass.
15
Section 5
CONDITION CAUSE CURE
ST RI NG ER S - O CC AS I ON AL
BLADES OF UNCUT GRASS
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
S T R E A K I N G - S T R I P S OF
UN CU T G R AS S I N CU TT IN G
P A TH
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
S T R E A K I N G - S T R I P S OF
U N C U T G R A S S B E T W E E N
CUTTING P A THS
Width
of
Deck
Width
of
Deck
SGB019
Not enough overlapping between rows Increase the overlap of each pass
TROUBLESHOO TING CUTTING CONDITIONS
16
Section 5
CONDITION CAUSE CURE
U N E v E N C U T O N F L A T
GROU ND - WA vY HI GH -LOW
AP PEA RA NC E, SCA LL OP ED
CUT , OR ROUGH CONT OUR
Lift worn from blade Replace blade
Blade upside down Mount with cutting edge toward ground
Deck plugged, grass accumulation Clean underside of deck
T oo 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
U N E v E N CU T O N U N E v E N
GROUND - WA vY APPEARANCE,
HIGH-LOW SCALLOPED CUT ,
OR ROUGH CONTOUR
Uneven ground
May need to reduce ground speed, r aise
cutting height, and/or change direction
of cut
S L O P I N G RI D G E AC R O S S
WIDTH OF CUTTING P A TH
Tire pressures not equal Check and adjust tire pressure
Wheels uneven Check and adjust tire pressure
Deck mounted incorrectly See y our authorized SCAG dealer
Deck not lev el side-to side Check for le vel and correct
TROUBLESHOO TING CUTTING CONDITIONS (CONT'D)
17
Section 5
CONDITION CAUSE CURE
SCALPING - BLADES HITTING
DIR T OR CUTTING vER Y CLOS E
TO THE GROUND
Low tire pressures Check and adjust pressures
Ground speed too fast Slow speed to adjust for conditions
Cutting too low
May need to reduce ground speed, r aise
cutting height, change direction of cut,
and/or change pitch and level
Rough terrain
May need to reduce ground speed, r aise
cutting height, and/or change direction
of cut
Ground speed too fast Slow speed to adjust for conditions
Wet grass Cut grass after it has dried out
STEP CUT - RIDGE IN CENTER
OF CUTTING P A TH
Blades not mounted evenly Adjust pitch and level
Bent blade Replace blade
Internal spindle failure See your authorized SCA G dealer
Mounting of spindle incorrect See your authorized SCAG dealer
SLOPE C UT - SLOPI NG RIDGES
ACROSS WIDTH OF CUTTING
P A TH
Bent spindle mounting area See your authorized SCAG dealer
Internal spindle failure See your authorized SCA G dealer
Bent deck housing See y our authorized SCAG dealer
TROUBLESHOO TING CUTTING CONDITIONS (CONT'D)
18
Section 6
P ARKING BRAKE ADJUSTMENT 6.1
Adjust the parking brake so that when the brake 1.
hand lever is against the stop on the handle bar , the
brake lev ers on the brake shaft weldment are against
the stops on the engine deck.
CA UTION
Adjust the brake onl y enough to hold the machine.
Ex c e ss i v e f o rc e m a y c au s e d a m ag e to th e
machine or brake components.
Adjust the brake actuator rod on either side of the
2.
machine to obtain proper brake adjustment.
NEUTRAL ADJUSTMENT 6.2
-NOTE-
Neutral has been set by your Scag dealer at the
time of set up and normally does not need to be
adjus ted. If, however, you fin d tha t the n eutra l
has come out of adjustment, follo w the procedure
below .
Raise the drive wheels off the ground and block the 1.
caster wheels to prevent the machine from mo ving.
Make sure the speed control lev er is in neutral, 2.
the steering control levers are in the neutral latch
position, and the parking brake is on. Star t the
engine.
Release the parking brake and note if the tires are 3.
rotating.
Start on the left side of the machine, using the 4.
adjustment wrench located on the left side of the
machine. Rotate the tracking adjustment nut counter
clockwise just until the LH wheel starts to creep
forward. Make note of the position of the adjustment
nut. Repeat on the right side as needed. See Figure
6-1.
T urn the adjustment nut clockwise just until the 5.
wheel turns rearward. Mak e note of the position
of the adjustment nut. T o adjust neutral, split the
difference between the two noted positions of the
adjustment nut. Repeat on the right side as needed.
Place the wrench in the holder on the left side of the 6.
machine and turn the engine off.
ADJUSTMENTS
Neutral Adjustment Figure 6-1.
STEERING CONTROL ROD 6.3
ADJUSTMENTS
-NOTE-
This a djust ment is made to all ow the steer ing
control lev ers to be mov ed out of the neutral latch
without engaging reverse
Before making this adjustment be sure that the
speed control bearing is just touching the speed
con tro l ca m a nd t hat th e be llc ran k b ear ing is
resting in the center groove of the neutral cam.
Remove the speed control spring. Remove the 1.
steering control rod swivel hair pin. Check the
location of the swivel in the slotted hole in the
bellcrank.
T urn the swivel joint on the steering control rods 2.
until the swivel joint is centered in the slot in the
bellcrank..
SLOW
FAST
TRACKING
ADJUSTMENT
SEE OPERAT
OR'S
MANUAL
390s0198-1
Control Rod Adjustment Figure 6-2.
Reinstall the speed control spring onto the swivel. 3.
Install the hair pin onto the swivel. See Figure 6-2.
19
Section 6
TRACKING ADJUSTMENT 6.4
-NOTE-
Before proceeding with this adjustment, be sure
that the tire pressures are correct and the neutr al
adjustm ent and t he s teering control rod adjus tment
have been completed.
With the machine on a flat level surf ace, start the
1.
engine, release the parking brake and place the
speed control lever into the speed that will most
often be used.
Squeeze the steering control levers and release the
2.
neutral latch. Slowly release the steering control
levers , allowing the machine to move forward.
W ARNING
B e f o r e a t t e m p t i n g to m a k e a n y t r a c k i n g
adjus tment s, move the spee d cont rol leve r to
the neutral position, place the blade engagement
switch in the off position, apply the parking brake,
and mov e the s teeri ng co ntrol l evers in to the
neutral position.
If the machine pulls to one side, stop the mower
3.
by placing the steering control levers in the neutr al
position. Using the adjustment wrench located on the
left side of the machine, turn the tracking adjustment
nut on the slower side counter clockwise until the
machine tracks straight.
Bring the steering control levers back to the neutral 4.
lock position and check to see that the machine does
not creep forward on the adjusted wheel.
If the machine creeps in neutral, you hav e moved out 5.
of the neutral band and will have to turn the tracking
adjustment nut clockwise until the machine does not
creep.
Repeat steps 1 and 2. If the machine contin ues 6.
to pull to one side, stop the mower by placing
the steering control levers in the neutral position.
T urn the tracking adjustment nut on the faster side
clockwise until the machine tracks straight.
If tracking cannot be acheived, contact y our Scag 7.
servicing dealer.
T racking Adjustment Figure 6-3.
THRO TTLE CONTROL AND CHOKE 6.5
ADJUSTMENTS
These adjustm ents must be performed by your Scag dea ler
to ensure proper and efficient running of the engine . Should
eithe r need adju stmen t, con tact yo ur aut hori zed Sc ag
service center.
CUTTER DECK BEL T ADJUSTMENTS 6.6
W ARNING
Before removing an y guards, shut the engine off
and remove the ignition key. Wait for all moving
parts to come to a com plete stop bef ore beginni ng
work.
Remove the belt cov er.
1.
Adjust the cutter deck drive belt using a belt tension 2.
gauge. Adjust the belt so that the belt moves 1/2"
with 10 pounds of pressure. Adjust the tension by
tightening or loosening the J-bolt. See Figure 6-4.
Nut
"J" Bolt
Belt
End Of L-Shaped
Bracket
Washer
SC400G
CUTTER DECK DRIVE BELT TENSION
ALIGNMENT IDLER - L.H.
Deck Drive Belt Adjustment Figure 6-4.
20
Section 6
-NOTE-
Due to initial belt stretch and to prevent the belt
from slipping, check this adjustment after the first
2 hours, 4 hours and 8 hours of operation.
Adjust the RH blade drive belt using a belt tension
3.
gauge. Adjust the belt so that the belt moves 1/2"
with 10 pounds of pressure. Adjust the tension by
tightening or loosening the J-bolt. See Figure 6-5
and Figure 6-6.
Cutter Deck Belt Adjustment R.H. Figure 6-5.
DISCHARGE
AREA
BELT TENSION
ADJUSTMENT IDLER
SC402G Rev. 2
CHECK BLADE DRIVE
BELT TENSION HERE
Cutter Deck Belt Figure 6-6.
BEL T ALIGNMENT 6.7
Belt alignm ent i s imp or tant for pr oper perfor manc e of
your Scag mower. If you experience freque nt belt wear
or breakage, see your authorized Scag service center for
belt adjustment.
ADJUSTING CUTTING HEIGHT 6.8
The mower deck can be adjusted from a height of 1-3/4
inches to 4-1/4 inches at 1/4-inch intervals.
Due to many cutting conditions that exist, it is difficult to
suggest a cutter dec k setting that will work for every lawn.
There are two adjustments that can be made to the cutter
deck, pitch and height.
PITC H is t he a ngle of t he bla des ( comp ari ng fr ont to
rear).
HEIGHT is the n ominal distance the blade is off of the
ground. This measurement is made with the blades pointed
side to side and distance is measured between the cutting
tip and ground. (Also see Blade Height Adjustment).
Ch a ng e s to t h e cu t ti n g he i gh t c a n be a c he i ve d by
repositioning the cutter deck. (This adjustment will also
effect the pi tch of the deck). There ar e three available
positions. See Figure 6-7.
Caster spacers also can be repositioned to change the
cutting heights and to change the pitch of the cutter deck.
See Figure 6-8.
LOW CUT (1-3/4" to 3")
HIGH CUT
(3-1/4" to 4-1/2")
MID RANGE
(2-1/2" to 3-3/4")
Adjusting Cutting Height Figure 6-7.
Caster Wheel Spacers Figure 6-8.
21
Section 6
BLADE HEIGHT ADJUSTMENT
Adjus ting the blad e h eight can be done b y m oving any n umber
of the five smaller 1/4" spacers on the blade mounting bolts
to the top of the spindle shaft or below the spindle shaft.
-NOTE-
All blades should be positioned equally .
W ARNING
Blades have a sharp cutting edge . Wear proper
eye protection and protective gloves or wrap the
blades with protective material when removing,
sharpening and installing blades.
For best cut an d discharge, a minimum of three spacers
should be installed between the blade and the spindle. See
Figure 6-9.
Blade Spacers Figure 6-9.
CUSTOM-CUT B AFFLE ADJUSTMENT
The Custom-Cu t Baffle is desi gned to deliver opti mum
airflow and super ior cutting performance in any type of
grass. The Custom-Cut Baffle can be raised or lowered
to precisely tailor the deck's performance for the type of
grass being cut. The baffle can be set in seven (7) diff erent
positions for optimum perf or mance.
A. 3-1/2" or 3-3/4" Position - (See Figure 6-10). For
very tall, wiry or tough-to-cut grass.
B. 4" (f actory setting), 4-1/4" or 4-1/2" P osition - (See
Figure 6-10). For general purpose cutting. This gives
the best mi x of cuttin g performa nce in all t ypes of
grass.
C. 4-3/4" or 5-1/4" Position - (See Figure 6-10).
Placing the baffle in either the 4-3/4" or 5-1/4" setting
will enhance f all cutting (leaf pickup) and reduce cutter
deck "blowout".
T o adjust the Custom-Cut Baffle height:
Place the cutter deck in the transport position. 1.
Remove the hardware securing the Custom-Cut 2.
Baffle to the cutter deck.
- NOTE -
Hardware location used in the illustrations are f or
reference o nly . Location of hard ware may vary
depending on cutter deck size.
Move the Custom-Cut Baffle to desired position. 3.
(See Figures 6-10).
Reinstall the mounting hardware. T orque hardware to 4.
39 ft-lbs.
22
Section 6
1
2
3
4
A
B
1
2
3
4
A
B
Custom-Cut Baffle Adjustment
Mounting Slot Selected Mounting Hardware Location
Slot “A” Hole 1 Hole 2 Hole 3 Hole 4
Height (inches) 3-3/4” 4-1/4” 4-3/4” 5-1/4”
Slot “B” Hole 2 Hole 3 Hole 4
Height (inches) 3-1/2” 4” 4-1/2”
Custom-Cut Baffle Adjustment Figure 6-10.
23
Section 6
ELECTRIC CLUTCH ADJUSTMENT 6.9
The electric clutch serves two functions in the operation of
the mower . In addition to starting and stopping the power
flow to the cutter blades , the clutch also acts as a brake to
assist in stopping blade rotation when the PTO is s witched
off or the operator presence circuit is interrupted.
When the clutch is disengaged, the air gap between the
armature and r otor m ust be adjusted to fifteen thousandths
of a n in c h, 0 . 01 5, f or p r op er ope r at io n . T h e ai rg ap
adjustment is made at three bolts on the clutch. There are
three inspection windo ws, one ne xt to each adjusting bolt.
See Figure 6-11.
Clutch Air Gap Adjustment Figure 6-11.
Locate the inspection windows on the clutch. 1.
Place a 0.015 feeler gauge in the slot between the 2.
rotor and the armature. See Figure 6-12.
INSERT 0.015 FEELER GA UGE HERE
Clutch Air Gap Adjustment Figure 6-12.
Tighten or loosen the adjusting bolt as needed to 3.
acheive the 0.015 inch airgap. See Figure 6-13.
Perf orm this operation at all three inspection
windows.
ADJUSTMENT NUTS
ADJUSTMENT NUTS
Clutch Air Gap Adjustment Figure 6-13.
Thi s a dj us tme nt sh ou ld be don e eve r y 5 00 hou rs of
operat ion or annual ly , w hichever co mes fi rst. In cas es
where the machine is hea vily used, airgap settings should
be checked more often.
If the air gap is too narrow, the clutch armature may drag
when disengaged, resulting in premature failure.
If the air gap is too wide, the clutch ma y be slow to engage
as the magnet must pull the armature in from a greater
distance.
24
Section 7
MAINTENANCE CHART - RECOMMENDED SER vICE INTERv ALS 7.1
HOURS
PROCEDURE COMMENTS
BREAK-IN
(FIRST 10)
8 20 40 100 200 500
X
Check all hardware for tightness
X
C h e c k a l l b e l t s f o r p r o p e r
alignment
See paragraph 7.6
X
Check engine oil lev el See paragraph 7.3
X
*Clean mower
X
Check tire pressure See paragraph 7.8
X
*Clean air filter element See paragraph 7.5
X
Check condition of blades See paragraph 7.7
X
Sharpen cutter blades See paragraph 7.7
X
Check tire pressure See paragraph 7.10
X
Check belt tension See paragraph 6.3
X
C h e c k t h e o p e r a t o r i n t e r l o c k
system
See paragraph 4.2
X
Change engine oil and filter See paragraph 7.3
X
Grease spindle bearings
X
Check belts for proper alignment See paragraph 7.6
X
C h e c k a l l b e l t s f o r p r o p e r
alignment
X
*Replace engine air filter S e e e n g i n e o p e r a t o r ' s
manual
X
Grease caster wheel bearings See paragraph 7.2
X
Check hydraulic system oil le vel See paragraph 7.3
X
Check all hardware for tightness
X
Change engine oil See paragraph 7.4
X
Gr e a s e br a k e l e ve r a n d b r a k e
actuator levers
See paragraph 7.2
X
*Clean air cleaner element See paragraph 7.5
* Perf orm these maintenance procedures more frequently under extreme dusty or dir ty conditions
MAINTENANCE