Schiller BOB-CAT 933305G User manual

OPERATOR’S MANUAL
MAN 4166109 Rev. A 11-2010
PARTS MANUAL 4165108
933305G
36 HYDRO MID-16HP KAW FS
933307G
36 HYDRO MID-18HP ES KAW FS
934306G
48 HYDRO MID-18HP KAW FS
934307G
48 HYDRO MID-18HP ES KAW FS
935308G
54 HYDRO MID-20HP KAW FS
935309G
54 HYDRO MID-20HP ES KAW FS

CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some
of its constituents are known to the
State of California to cause cancer,
birth defects and other reproductive
harm.
Californie Proposition 65 Avertisse-
ment
Les échappements des moteurs diesel et
certains de leurs composés sont recon-
nus par l’Etat de Californie pour être
cancérigènes, provoquer des défauts con-
génitaux et d’autres dangers en matière de
reproduction.
ADVERTENCIA
AVERTISSEMENT
WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
California Advertencia
de la Proposicion 65
El estado de California hace saber
que los gases de escape de los mo-
tores diesel y algunos de sus com-
ponentes producen cáncer, defectos
de nacimiento y otros daños en el
proceso de reproducción humana.
L’ é mission du moteur de ce mat é riel
contient des produits chimiques que
l’Etat de Californie consid è re ê tre
canc é rig è nes, provoquer des d é fauts
cong é nitaux et d’autres dangers en
mati è re de reproduction.
El estado de California hace saber
que los gases de escape de este
producto contienen productos quÍmi-
cos que producen cáncer, defectos
de nacimiento y otros daños en el
proceso de reproducción humana.
CALIFORNIA
Proposition 65 Warning
Battery posts, terminals, wiring
insulation, and related accessories
contain lead and lead compounds,
chemicals known to the State of
California to cause cancer and birth
defects or other reproductive harm.
WASH HANDS AFTER HANDLING.

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11-2010
IMPORTANT MESSAGE
Thank you for purchasing this Schiller Grounds Care, Inc. product. You have purchased a world class mowing
product, one of the best designed and built anywhere.
This machine comes with an Operation and Safety Manual and a separate Setup, Parts and Maintenance Manual.
The useful life and good service you receive from this machine depends to a large extent on how well you read
and understand these manuals. Treat your machine properly, lubricate and adjust it as instructed, and it will give
you many years of reliable service.
Your safe use of this Schiller Grounds Care, Inc. product is one of our prime design objectives. Many safety
features are built in, but we also rely on your good sense and care to achieve accident-free operation. For best
protection, study the manuals thoroughly. Learn the proper operation of all controls. Observe all safety precau-
tions. Follow all instructions and warnings completely. Do not remove or defeat any safety features. Make sure
those who operate this machine are as well informed and careful in its use as you are.
See a Schiller Grounds Care, Inc. dealer for any service or parts needed. Schiller Grounds Care, Inc. service
ensures that you continue to receive the best results possible from Schiller Grounds Care, Inc. products. You
can trust Schiller Grounds Care, Inc. replacement parts because they are manufactured with the same high
precision and quality as the original parts.
Schiller Grounds Care, Inc. designs and builds its equipment to serve many years in a safe and productive man-
ner. For longest life, use this machine only as directed in the manuals, keep it in good repair and follow safety
warnings and instructions. You'll always be glad you did.
Schiller Grounds Care, Inc.
One Bob Cat Lane
Johnson Creek, WI 53038-0469
TABLE OF CONTENTS PAGE
SAFETY............................................................................................................................................................2
LABELS.........................................................................................................................................................3-5
GENERAL INSTRUCTIONS ........................................................................................................................6, 7
CONTROLS..................................................................................................................................................8, 9
MACHINE OPERATION............................................................................................................................10-12
HEIGHT OF CUT.......................................................................................................................................13-15
BELT REPLACEMENT...................................................................................................................................16
ADJUSTMENTS........................................................................................................................................17-20
SPECIFICATIONS.....................................................................................................................................21-23

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MODEL NUMBER: This number appears on sales
literature, technical manuals and price lists.
SERIAL NUMBER: This number appears only on
your mower. It contains the model number followed
consecutively by the serial number. Use this number
when ordering parts or seeking warranty information.
SAFETY
NOTICE !!!
Unauthorized modications may present extreme
safety hazards to operators and bystanders and
could also result in product damage.
Schiller Grounds Care, Inc. strongly warns against,
rejects and disclaims any modications, add-on
accessories or product alterations that are not
designed, developed, tested and approved bySchiller
Grounds Care, Inc. Engineering Department. Any
Schiller Grounds Care, Inc. product that is altered,
modied or changed in any manner not specically
authorized after original manufacture–including the
addition of “after-market” accessories or component
parts not specically approved by Schiller Grounds
Care, Inc.–will result in the Schiller Grounds Care,
Inc. Warranty being voided.
Any and all liability for personal injury and/or property
damage caused by any unauthorized modications,
add-on accessories or products not approved by
Schiller Grounds Care, Inc. will be considered
the responsibility of the individual(s) or company
designing and/or making such changes. Schiller
Grounds Care, Inc. will vigorously pursue full
indemnication and costs from any party responsible
for such unauthorized post-manufacture modications
and/or accessories should personal injury and/or
property damage result.
This symbol means:
ATTENTION!
BECOME ALERT!
Your safety and the safety of others is involved.
Signal word denitions:
The signal words below are used to identify levels
of hazard seriousness. These words appear in this
manual and on the safety labels attached to Schiller
Grounds Care, Inc. machines. For your safety and
the safety of others, read and follow the information
given with these signal words and/or the symbol
shown above.
DANGER indicates an imminently hazardous
situation which, if not avoided, WILL result in death
or serious injury.
WARNING indicates a potentially hazardous
situation which, if not avoided, COULD result in
death or serious injury.
CAUTION indicates a potentiallyhazardous situation
which,if notavoided, MAY result inminor ormoderate
injury. It may also be used to alert against unsafe
practices or property damage.
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which, if
not avoided, MAY result in property damage.

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LABELS
Manufactured under one or more
of the following U.S. patents:
5,343,678 5,415,059
5,651,241 4165666

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LABELS
For use on: 933307G, 934307G, 935309G
For use on: 933305G, 934306G, 934308G

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LABELS

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j) Never operate the equipment in wet grass. Always
be sure of your footing; keep a rm hold on the
handle and walk; never run.
OPERATION
a) Do not operate the engine in a conned space where
dangerous carbon monoxide fumes can collect.
b) Mow only in daylight or in good articial light.
c) Always be sure of your footing on slopes.
d) Walk, never run.
e) With walk behind machines,mow across the slopes,
not up and down.
f) Exercise extreme caution when changing direction
on slopes.
g) Do not mow excessively steep slopes.
h) Use extreme caution when reversing or pulling the
mower towards you. Be sure the area behind is
clear.
i) Stop the blades if the mower has to be tilted for
transportation, when crossing surfaces other than
grass and when transporting the mower to and from
the area to be mowed.
j) Never operate the mower without proper guards,
plates, grass catcher or other safety protective
devices in place.
k) Do not change the engine governor settings or
overspeed the engine.
l) Disengage all blades and drive clutches before
starting the engine.
m) Start the engine carefully according to instructions
and with feet well away from the blades.
n) Do not start the engine when standing in front of
the discharge chute.
o) Do not put hands or feetnear or under rotating parts.
Keep clear of the discharge opening at all times.
p) Never pick up or carry a mower while the engine
is running.
q) Stop the engine, wait for the blades to come to
a complete stop, and disconnect the spark plug
wire:
• before clearing blockages or unclogging chute;
• before checking, cleaning or working on the
mower;
• after striking a foreign object. Inspect the mower
for damage and make repairs before restarting
and operating the mower;
• if mower starts to vibrate abnormally (check
immediately for the cause). Vibration is generally
a warning of trouble.
Before using machine for the rst time, check engine
and hydraulic uid levels and lubricate all points.
TRAINING
a) Read the operator’s manual carefully.Allrotary grass
cutters are potentially dangerous.No person should
operate the machine unless they are familiar with
the controls and the proper use of the machine.
b) Never allow children or people unfamiliar with these
instructions to use the mower. Local regulations
may restrict the age of the operator.
c) Keep the area of operation clear of all persons,
particularly small children and pets.
d) Keep in mind that the operator oruser is responsible
for accidents or hazards occurring to other people
or their property.
PREPARATION
a) Do not operate the equipment when barefoot or
wearing open sandals. Always wear substantial
footwear and long trousers.
b) Wear hearing protection.
c) Thoroughly inspect the area where the equipment
is to be used and remove rock, toys, wire or other
debris which may be picked up and thrown by the
machine.
d) Gasoline is highly ammable.
• Store gasoline only in a container specically
designed for gasoline storage in a cool, dry
place away from sparks and open ame.
• When refueling or checking fuel level:
• Stop engine. Allow to cool.
• Refuel outdoors only.
• Do not smoke.
• Use a funnel. Do not overll. Clean up spills
and move machine away from spills before
starting.
• Replace caps tightly.
e) Replace faulty mufers.
f) Before using, always visually inspect to see that
the blades, blade bolts and cutter assembly are
not worn or damaged. Replace worn or damaged
blades and bolts.
g) On multi-bladed machines, take care as rotating
one blade can cause other blades to rotate.
h) Disengage the self-propelled mechanism or drive
clutch on units so equipped before starting the
engine (motor).
i) Never attempt to make adjustmentswhile the engine
(motor) is running.
GENERAL INSTRUCTIONS

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GENERAL INSTRUCTIONS
r) Stop the engine:
• whenever you leave the mower;
• before refuelling.
s) Shut the engine (motor) off and wait until the blades
come to a complete stop before removing the grass
catcher or unclogging chute.
t) Reduce the throttle setting during engine shut down
and, the engine is provided with a shut-off valve,
turn the fuel off at the conclusion of mowing.
u) Go slow when using a trailing seat.
v) Keep washout ports and other mower-housing
service openings closed when mowing.
x) Do not engage PTO at full throttle. Throttle midway
between idle and highest possible engine speed.
y) Do not start the cutting blades until you are ready
to start mowing.
z) Do not carry passengers.
aa) Do not operate where ying debris may injure people
or damage property. Keep people and pets at a safe
distance.
ab) Do not use if there are any doubts about safety.
ac) Keep labels, guards and shields in place. Replace
operators manual if lost or damaged.
ad) Obey safety instructions. Failure todo so may cause
injury to yourself or others.
ae) Do not defeat interlocks. Check operation daily.
af) Do not allow children, unskilled oruntrained persons
to operate machine.
OPERATING ON SLOPES
USE EXTRA CARE WHEN WORKING ON SLOPES
• With walk behind machines, mow across slopes,
not up and down. With ride-on machines, mow
up and down slopes, not across, except zero turn
machines. Zero turn machines should mow across
slopes.
• Be alert to dips and rises which change the general
slope. Watch for holes, rocks and roots in the terrain
and other hidden hazards. Keep away from drop
offs. Avoid ground conditions which will cause the
machine to slide.
• If the operator is uncomfortable or unsure of the
machines stability, operation on theseslopes should
cease immediately.
• The ultimate responsibility for safe operation on
slopes, rests with the operator.
• Use lower speeds and exercise extreme caution
on slopes and especially in sharp turns to prevent
tipping and loss of control. Use extra caution when
changing direction on slopes.
LEAVING THE DRIVING POSITION
Park the machine on level ground. Before leaving the
driving position, stop the engine, make sure all moving
parts are stationary and that the traction control levers
are in the neutral position. Apply parking brake.
MAINTENANCE AND ADJUSTMENTS
• Disconnect spark plug wire(s) before doing any
maintenance.
• Particular care must be taken when adjusting the
carburetor while the engine is running. Keep hands
and feet clear. Shut off PTO.
• When working underneath lifted parts or machines,
make sure adequate support is provided.
• Do not dismantle the machine without releasing or
restraining forces which can cause parts to move
suddenly.
• Keep all nuts, bolts and screws tight to be sure the
equipment is in safe working condition.
• Check the grass catcher frequently for wear and
deterioration.
• Replace worn or damaged parts for safety.
STORAGE
• Never store the equipment with gasoline in the tank
inside a building where fumes may reach an open
ame or spark.
• Allow the engine to cool before storing in any
enclosure.
• To reduce the re hazard, keep the engine, mufer,
battery compartment and gasoline storagearea free
of grass, leaves or excessive grease.
• If the fuel tank has to be drained, this should be
done outdoors.
• Use only replacement parts supplied by the original
manufacturer.

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CONTROLS
OPERATOR PRESENT CONTROLS (A)
The control levers must be held down for PTO
operation and to shift the speed control out of neutral.
If the PTO switch is on or speed control is shifted
from neutral and the control levers are released, the
engine will kill. On electric start models the control
levers must be released, the blades must be off and
the speed control must be in neutral for the engine to
start.
PTO SWITCH (B)
•DO NOT START CUTTING BLADES UNTIL
READY TO START MOWING.
•DO NOT ENGAGE PTO AT FULL THROTTLE.
SET ENGINE SPEED MIDWAY BETWEEN HIGH
IDLE AND LOW IDLE FOR ENGAGEMENT.
•Disengage drive to cutting blades whenever you
stop or leave the operators position.
•Shut off engine and remove spark plug wire be-
fore making adjustments or unplugging mower.
•The drive to the cutters is engaged when the
PTO switch is pulled up toward the operator (ON)
and disengaged by pushing the PTO switch back
down (OFF).
PARKING BRAKE (C)
Pull lever back to engage parking brake. Push lever
forward to disengage parking brake.
THROTTLE CONTROL (D)
By moving the throttle lever forward towards the
engine, the engine speed is increased until the
maximum governed rpm is obtained. By moving the
throttle lever fully back, the engine will Idle down. On
engines with an integrated choke, Moving the throttle
lever forward to the detent gives maximum governed
rpm. Moving it past the detent, chokes the engine.
SPEED SELECTOR (E)
The speed selector levers in the center of the control
panel set the maximum forward and reverse speeds.
The further the levers are moved forward, the faster
the maximum preset speed. The levers must be
moved forward for both forward and reverse speeds.
Speed changes can be done on the go. The opera-
tor present levers must be held down or the engine
will kill when the speed control levers are moved out
of the neutral position.
TRACKING ADJUSTMENT KNOB (I)
The tracking adjustment knob provides on-the-go
tracking control to correct for any hydraulic circuit or
linkage differences from one side to the other.
To correct tracking:
1. Rotate the tracking adjustment knob to the right
to make the machine track to the right.
2. Rotate the tracking adjustment knob to the left to
make the machine track to the left.
CHOKE (J)
Provided with engines that do not have the integrated
choke/throttle D. Pull up on choke control to engage
choke when starting the engine. Push down on
choke control to open choke after engine starts.

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CONTROLS
KEYSWITCH (F)
Recoil models: Turn to right to allow engine to be
started. Turn key to left to stop engine.
Electric start models: Turn key to right and hold until
machine starts. When machine starts, let go of key
and it will return to run position. Turn key to left to
stop engine.
TRACTION CONTROL LEVERS (G)
TRACTION LOCKS (H)
The traction locks provide a neutral position when
pulled back and locked with traction control levers.
To release: pull the traction control levers up enough
to push forward on the locks.
NOTE:
•Squeezing the traction levers past the neutral
position will cause the machine to back up)
•Both traction control levers must be released
at the same time in order to go straight ahead.
Using one traction control lever will cause the
machine to turn to one side.
•When using the locks to provide a neutral position
be sure the traction control rods are fully seated in
the rear notch of the traction locks. Failure to do
this may result in serious injury.
The traction control levers have ve functions:
1. To provide a neutral position to stop the machine
or to start the engine. Squeeze the levers enough
to engage the traction lever locks by moving the
tops of the locks towards the handgrip, then re-
lease the levers.
2. To engage the drive to wheels: gradually release
the traction control levers to the speed set by the
speed control and throttle.
3. To stop: pull the levers up to neutral.
4. To steer the unit: pulling up on the R.H. lever will
initiate a R.H. turn and pulling up on the L.H. lever
will initiate a L.H. turn.
5. To back up: squeeze the levers equally past
neutral. This may be done any time the engine
is running and the speed selector is not set in
neutral, allowing instant forward/reverse operation
and zero turning with one wheel driving forward
and one wheel driving backward. Releasing the
traction lever from reverse automatically returns
the machine to neutral or the preset forward
speed, depending on where the traction locks are
set.
NOTE: There is a noticeable difference in the force
required at the traction levers in the transition from
neutral to reverse.

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MACHINE OPERATION
BEFORE STARTING THE ENGINE:
• Disengage cutterdeck drive.
• Traction levers are positively locked in neutral.
• Parking brake is on and speed selector is in neutral.
1. Check the engine oil level and add if necessary. Open the fuel valve under the fuel tank. Set the traction
levers in the neutral position and the PTO switch to the off position. Shift the speed selector to neutral.
2. For cold starts, set the throttle lever to the half open position and apply the choke.
NOTE: For engines with combination choke/throttle controls, move throttle lever all the way forward to
choke position.
3. Pull the rope operated recoil starter rmly, or turn the key to operate electric starter (if so equipped) to
start the engine. Allow the rope to recoil slowly before releasing the handle.
4. As soon as the engine starts, gradually back the choke off from the choke position until the engine will
run with no choke at all.
OPERATING THE MACHINE
• Practice at slow engine and speed selector speeds with the blade control disengaged until completely
familiar with the controls.
• For normal cutting the throttle should be set at the full open position. By using the speed control lever
to speed up or slow down the machine during use, maximum control and cutting efciency can be
maintained.
• Using the machine at less than full throttle in heavy conditions will cause the engine to labor and result in
excessive wear.
• For maneuvering where the speed control lever does not give the required speed, partial throttle may be
used.
• Steering is controlled by the operation of the traction control levers. To steer the machine to the left,
reduce the drive to the L.H. wheel by pulling up the L.H. traction control lever. To steer to the right, reduce
the drive to the R.H. wheel by pulling up the R.H. traction control lever. Pulling a traction control lever up
past neutral will cause that wheel to back up.
• To change speeds, depress the operator present controls then move speed control levers to desired
speed.
FUEL TANK
GASOLINE IS HIGHLY FLAMMABLE!
• Fill fuel tank with good quality, clean, regular unleaded gasoline.
• Do not use hi-test fuel.
• Do not smoke.
• Do not spill fuel.
• Fill outdoors.
• Do not overll. Fill to 1" below bottom of ller neck to allow room for expansion.
• USE A FUNNEL TO FILL GAS TANK

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MACHINE OPERATION
CUTTING WITH THE MACHINE
1. Make sure the discharge chute is in position or a grass collector is correctly tted before starting to cut.
2. Depress the operator present controls.
3. Turn blades on with the PTO switch.
4. Do not start blades at full throttle. Use engine speed midway between high idle and low idle.
5. Move the speed selector lever to give the required cutting speed. Release the traction locks and gradually
engage both traction control levers together.
6. Operate so that clippings are discharged onto the area that has been cut. This will result in a more even
distribution of clippings and more uniform cutting.
• When mowing large areas, start by turning to the right so that clippings will be discharged away from
shrubs, fences, driveways, etc. After two or three rounds, mow in the opposite direction, left hand turns,
until nished.
• If grass is extremely tall, it should be mowed twice, the rst cut relatively high, the second cut to the de-
sired height.
• Use the left side of the mower for trimming.
TO STOP THE MACHINE
1. Pull traction levers up to neutral.
2. Engage the traction lever locks in neutral position.
3. Disengage the cutterdeck with PTO switch.
4. Move speed control to neutral.
5. Close the throttle to slow the engine, turn engine off with the keyswitch.
NOTE: When the machine is transported by truck or trailer or left to stand unused, the fuel valve (under the
fuel tank) should be turned off. This avoids the possibility of ooding should any dirt get under the carburetor
oat needle. Leaving the fuel valve open can allow severe ooding which may ruin the engine by diluting the
oil.
PREVENT INJURY OR PROPERTY DAMAGE FROM THROWN OBJECTS
OR FROM CONTACT WITH THE BLADE
• Keep body parts away from blades.
• Stop engine and let blades stop before removing grass collector or unclogging.
• Keep area clear of people and pets.
• Remove objects blade may strike and throw.
• Stop blades to cross gravel areas.
• Do not operate without chute, mulcher or entire grass collector in place.
DRIVING THE MACHINE IN TRANSPORT
1. With the PTO switch disengaged, and the operator present controls depressed, move the speed selector
lever to give the required forward speed.
2. Release the traction lever locks and gradually engage both traction control levers together.
NOTE: Engaging only one traction lever will cause the machine to turn to one side. Squeezing one traction
lever past neutral will cause the machine to back up to one side.

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PUSHING THE MACHINE WITH THE ENGINE
STOPPED:
Open dump valve V on each pump by turning counter
clockwise two revolutions. Move the machine and
close dump valve V by turning clockwise until valve
is rmly seated.
MACHINE OPERATION

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HEIGHT OF CUT
Make all adjustments with the engine shut off, spark
plug wire disconnected and mower drive disengaged.
FIXED CUTTERDECK HEIGHT OF CUT
The cutting height is determined by the position of
the blades in relation to the wheels. Variation to this
height may be made at THREE points. (See Height
of Cut Charts on page 15).
1. THE CASTER WHEELS
1. Remove the quick pin Pfrom the top of the
caster wheel pivot spindle.
2. Place required spacers above or below
wheel support bracket and replace the quick
pin P.
2. CUTTERDECK BLADE SPINDLES
NOTE: See MAINTENANCE section of the Setup,
Parts & Maintenance manual for blade removal and
replacement procedures.
1. Remove belt cover.
2. Remove nut Nfrom the top of the cutter spindle
bolt.
3. Withdraw the cutterdeck spindle bolt (from
bottom) complete with washer, blade and
spacers
4. Place the required number of spacers (no more
than 2) on the cutterdeck spindle bolt below the
cutterdeck, between blade and spindle shaft.
5. Fit any excess spacers on the cutterdeck spindle
bolt above the deck, between the conical washer
and the nut. Replace nut and tighten to 70 ft-lbs.

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HEIGHT OF CUT
GNITTUC
THGIEH
ELOH
NONOITISOP
ENIGNE
*KCED
KCOLB
TATHGIEH
FORAER
)B(KCED
"526.1-"573.15"52.1
"573.2-"578.14"00.2
"521.3-"526.23"57.2
"578.3-"573.32"05.3
"526.4-"521.41"52.4
elohtsehgihehtsi1noitisoP*
.kcedenigneehtno
SETTING CUTTERDECK HEIGHT
CUTTERDECK POSITION
.
1. Support rear of power unit.
2. Place blocks under both outside edges of cutter-
deck at B. See Block chart below.
3. Remove (2) upper deck mounting bolts C.
4. Loosen (2) lower deck mounting bolts Dseveral
turns. Loosen enough to allow easy movement
of the rear of cutterdeck. Allow deck to set down
on blocks or if deck is being raised, allow the
front casters to sit on the oor.
5. Reinstall upper deck mounting bolts Caccording
to the chart for the cut height desired.
6. Tighten all bolts and reinstall belt cover.
7. Remove rear support and blocks under the deck.
8. Your side discharge mower will give you the best
cut if the very tip of the front blade is 1/8" to 1/4"
lower then the rear of the rear blade.

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HEIGHT OF CUT
NOTE: Use only these combinations of settings. If any other setting is used, quality of cut will suffer because
of wrong blade angle. These height of cut charts were developed in a controlled workshop environment.
Slight variations can occur in the eld, depending on tire pressures, etc. Make sure front of blade is lower
than back of blade to prevent double cutting. Adjustment is provided by removing 1/8" washer beneath caster
support.
FIXED CUTTERDECK HEIGHT OF CUT
UPPER BOLT POSITION
1114.375 611
4.625 1181 16
CUTTING HEIGHT
2.625
3.625
4.125
3.875
3.375
3.125
2.875
1.875
2.375
2.125
1.625
1.375
IN
67 01
92
105
98
79
86
73
01
1
10
0
1
1
11
1
1
48
54
60
35
41
MM
11
1
10
0
A
1
1
B
1
1
2
5
5
5
3
3
3
0
2
2
C
0
0
C(1/2")
B(1/4")
A(1/8")
21
11
4
2
2
2
3
3
3
5
4
4
5
5
0
2
1
0
1
0
2
0
1
2
1
2
SPACERS BETWEEN
2
5
4
3
1
4109861
(1/4" THICK)
AND BLADE
SPINDLE
NUMBER OF

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BELT REPLACEMENT
CUTTERDECK BELT
1. Remove PTO belt.
2. Rotate idler arm using a 3/8" ratchet or breaker
bar and remove belt.
3. Replace in the reverse order.
PUMP-DRIVE BELT
1. Remove PTO belt from the engine clutch.
2. Disconnect the clutch wire harness.
3. Unbolt clutch bracket from clutch and rotate the
clutch to allow enough clearance to remove the
clutch bracket.
4. Rotate idler arm using a 3/8" ratchet or breaker
bar inserted into the square hole in the idler arm.
5. Remove pump drive belt.
6. Replace by following steps in reverse order.
PTO BELT
1. Rotate idler arm using a 3/8" ratchet or breaker
bar and remove belt.
View under engine deck

17
Hydro
Midsize
ADJUSTMENTS
TRACTION DRIVE HYDROSTAT ADJUSTMENTS: The following adjustments must be done in order.
STEP 1 - Set Neutral
Neutral is set at the factory. If it should require
adjustment, raise the wheels off the ground by setting
the machine on jackstands or blocks. Disconnect
the traction control rod Aand speed control rod R
at each pump end. Disconnect pump arm spring U
from bolt on engine deck. Loosen bolt Ssecuring the
neutral plate eccentric shaft just enough to turn the
shaft. Start the engine and run at low speed. Turn
eccentric shaft Tto raise or lower the point at which
the follower bearing is held in the center of the “V”
until the wheels stop turning. Tighten the eccentric
shaft bolt. Increase the throttle setting and check the
adjustment. Readjust if necessary. Shut the engine
off before proceeding to steps 2 and 3.
STEP 2 - Adjust Speed Control Rods
First adjust neutral, as outlined in Step 1. Set speed
control levers to neutral. Adjust swivels on lower
ends of speed control rods Rso they just go into top
of the slots on the neutral plates.
NOTE: If the speed control levers do not have
adequate tracking adjustment, the swivel on one of
the rods needs to be turned 1 turn.
STEP 3 - Adjust Traction Levers
Set neutral and adjust speed control rods as outlined
in Steps 1 and 2. Set traction locks in the neutral
position. Grasp traction rod Aand pull down on it to
take out any slack. The pump control arm has some
back and forth play. Adjust the swivel to the center
of the control arm play. Connect the swivel to the
control arm. Reattach pump arm spring Uto bolt on
engine deck.
NOTE: More reverse speed may be gained by
adjusting the swivel to the rear of the control arm
play. A minimum of 1/16" play is required so the
traction controls can be put in neutral without the
machine backing up.

18
Hydro
Midsize
ADJUSTMENTS
PARKING BRAKE
Apply parking brakes and open the bypass valves
on the hydraulic pumps. Try to push the machine
forward. If wheels rotate, adjust brakes as follows.
TO ADJUST:
1. Remove the hairpin cotter Afrom the brake rod
at the brake lever as shown.
2. Slide the brake rod out of the brake lever and
turn the rod in or out of the brake swivel Bas
needed.
NOTE: The brake should initially be adjusted so
that the brake rod extends through swivel B
1" as shown. If more brake pressure is required
adjust as necessary.
3. Reassemble brake rod to the brake lever using
hairpin A.
4. Apply parking brakes and try to push the machine
forward. If wheels rotate, readjust brakes.
5. Close bypass valves on the hydraulic pumps.
Speed Control Lever Friction
The speed control lever is held where set by friction
pads. If the setting will not hold, tighten nuts Eto
increase friction on the speed control lever.
Adjust Knob Dto get machine to track in a straight
line.