HUSTLER 3700 Operator's Manual

Hustler 3700

Operator’ s Manual

109627CE_0512 REV F

•••••

P.O. Box 7000

•••

Hesston, Kansas

•

67062-2097

Manual version

Original Instructions in English

Hustler Turf Equipment Authorized Representative

Hastrac A/S
Birkegaardsvej 30
8361 Hasselager
Denmark
Mr. H. K. Hansen
Phone:[phone]

FAX: [phone]

Excel Industries, Inc.

Manufacturer of Hustler Turf Equipment

200 South Ridge Road
Hesston, Kansas 67062
T elephone [phone]
FAX [phone]

REV F 109627CE_0512

GENERAL INFORMATION

Year
2003

Month

November

Serial

Number

Weight of machine

without operator

This manual applies to the following Hustler equipment

lines:

Hustler 3700

To the new owner

The Hustler equipment lines, listed above, are designed to be
used as riding lawn mowers. they must be used for mowing
purposes only.

The purpose of this manual is to assist owners and operators
in maintaining and operating the 3700 power unit. Please read it
carefully; information and instructions furnished can help you
achieve years of dependable performance.

A separate Engine Owner’s Manual is included with your
owner’s packet which contains additional engine information
that will not be repeated in this manual. You are urged to read it
before attempting any operation or repair of the engine.

The decals are designed to give the operator brief information
needed in the daily operation and service of the machine. These
decals are not intended to be used in place of this manual but
instead are to be used as an extension of this manual. These
decals should not be removed or obliterated. Replace these
decals if they become unreadable.

It is the owner’s responsibility to make certain that the
operators and mechanics read and understand this manual and
all decals before operating this machine. It is also the owner’s
responsibility to make certain that the operators and mechanics
are qualified and physically able individuals, properly trained in
the operation of this equipment. All operator and mechanics
must become familiar with the safe operation of the equipment,
operator controls and safety signs.

Never let children or untrained people operate or service the
equipment. Local regulations may restrict the age of the
operator.

For more detailed maintenance and adjustment information
refer to the proper parts manual for your machine. Refer to the
Product Literature section of this manual for ordering
information.

The owner/user can prevent and is responsible for accidents or
injuries occurring to themselves, other people or property.

not reflected in this owner’s manual, or the parts manual, see
your Hustler dealer for current information and parts.

Warranty registration

The Delivery and Warranty Registration form must be
completed and signed to validate your warranty protection. As
the new equipment owner, you are expected to see that the form
is completed and forwarded to Hustler Turf Equipment at time
of delivery.

Be sure to register the power unit plus each attachment that
displays a model and serial identification number plate with
Hustler Turf Equipment.

IMPORTANT: Any unauthorized modification, alteration,

or use of non-approved attachments voids the warranty and
releases Hustler Turf Equipment from any liability arising from
subsequent use of this equipment.

power unit gross vehicle weight (GVW)

This power unit has a maximum gross vehicle weight (GVW)
of 3500 lbs. which must not be exceeded. Use only Hustler
approved attachments and accessories

Model and serial number

power unit model and serial numbers are found on the serial
identification plate, located on the frame directly in front of the
left rear wheel.

These numbers are required on the Warranty Registration
form. They will also assure you of the correct service parts
when replacement becomes necessary.

Shown below is an example of a serial identification plate and
how to interpret it.

Using this manual

General operation, adjustment and maintenance guidance is
outlined for both the experienced and novice Hustler user.
Operating conditions vary considerably and cannot all be
addressed individually. Through experience, however,
operators should find no difficulty in developing good operating
skills suitable to most conditions.

Directions used in this manual, for example RIGHT or LEFT,
refer to directions when seated on power unit facing forward,
unless otherwise stated.

Photographs and illustrations used were current at the time of
printing, but subsequent production changes may cause your
machine to vary slightly in detail. Hustler Turf Equipment
reserves the right to redesign and change the machine as deemed
necessary, without notification and without incurring any
obligation to make changes or additions to equipment sold
previously . If a change has been made to your machine which is

109627CE_0512 1-1 REV F

Parts and service

Use original Hustler replacement parts only. These parts are
available through your local Hustler dealer. To obtain prompt,
efficient service, always provide the following information
when ordering parts:

1. Correct part description

2. Correct part number

3. Correct model number.

4. Correct serial number.

All warranty repair and service must be handled through an

authorized Hustler dealer. Arrangements should be made
through your local service center.

REV F 1-2 109627CE_0512

109627CE_0512 1-3 REV F

REV F 1-4 109627CE_0512

SAFETY PRECAUTIONS

• Read Owner’s Manual and decals
before attempting to operate this
machine.

• Do not smoke while refueling.

• Do not fill tank with engine running, or
while the engine is hot.

• Allow engine to cool before storing
machine inside a building.

• Store away from open flame or spark.

• Clean up any gasoline spills.

• Do not refuel while in enclosed trailer or
other enclosed areas

• This model has been certified
and is in compliance with
European Directive 98/37/EC

776310 REV. B

• This label on your mower indi­cates that this model has been
certified and is in compliance
with European Directive 2000/
14/EC.

This safety alert symbol is used to call attention to a
message intended to provide a reasonable degree of
PERSONAL SAFETY for operators and other persons
during the normal operation and servicing of this
equipment.

DANGER: denotes immediate hazards which WILL
result in severe personal injury or death.

WARNING: denotes a hazard or unsafe practice which
COULD result in severe personal injury or death.

This manual uses two other words to highlight information.
IMPORTANT calls attention to special mechanical
information and NOTE emphasizes general information
worthy of special attention.

All operators and mechanics should read this manual,
and be instructed about safe operating and maintenance
procedures.

Improper use or maintenance of this machine by the
operator or owner can result in injury. To reduce the
potential for injury, comply with these safety instructions
and always pay attention to the safety alert  symbol,
which means DANGER or WARNING - “personal safety
instructions.” Failure to comply with the instructions may
result in personal injury or death.

Incorrect usage of this machine may result in severe

Safety and Instruction Decals

injury. Personnel operating and maintaining it should be
trained in the proper use and should read the manuals
completely and thoroughly before attempting to set-up,
operate, adjust, or service this machine.

The decals are designed to give the operator brief
information needed in the daily operation and service of the
machine. These decals are not intended to be used in place of
this manual but instead are to be used as an extension of this
manual. These decals should not be removed or obliterated.
Replace these decals if they become unreadable.

• It is the owner’s responsibility to make certain that the

operators and mechanics read and understand this man­ual and all decals before operating this machine.

• It is also the owner’s r esponsibility to make certain that

the operators and mechanics are qualified and physically
able individuals, properly trained in the operation of this
equipment.

• All operators and mechanics must become familiar with
the safe operation of the equipment, operator controls
and safety signs.

• Never let children or untrained people operate or service
the equipment. Local regulations may restrict the age of
the operator.

• The owner/user can prevent and is responsible for acci­dents or injuries occurring to themselves, other people or
property.

• The owner should also ensure that the operator/
mechanic know that they are responsible for their own
safety as well as the safety of other persons within the
vicinity. Remember, the operator is responsible for
accidents or hazards occurring to other people or their
property.

Specific safety warning decals are located on the equipment near the immediate areas of potential hazards. These decals

should not be removed or obliterated. Replace them if they become non-readable.

The following illustrations show the various decals that are located on the machine. A brief explanation, for tho se requiring

one, is shown to help the operator understand the meanings of these decals.

109627CE_0512 2-1 REV F

USE ONLY LOW
OR ULTRA LOW
SULFUR FUEL

728469 REV. B

WARNING: Hot surface!

• Keep a safe distance from the
machine.

• Do not open while engine is hot. Wait
until the system has fully cooled to ser­vice.

• Always keep shields or covers in place

WARNING: Hot fluid under pressure

• Keep hands, feet and clothing clear
of this area.

• Always keep shields or covers in
place.

WARNING: Rotating fan
blade!

601968

• Avoid hydraulic fluid escaping under
pressure

• Hydraulic fluid escaping under pressure
can penetrate skin.

• Hydraulic fluid escaping under pressure
may have sufficient force to penetrate
skin and cause serious injury. Foreign
fluid injected into the skin must be surgi­cally removed within a few hours by a
doctor, familiar with this form of injury, or
gangrene may result.

• Before applying pressure to hydraulic
system, make sure all connections are
tight and all hoses and lines are in good
condition.

• Relieve all pressure in the system before
disconnecting or working on hydraulic
lines.

• To find a leak under pressure, use a
piece of cardboard or wood – never use
your hands.

• To relieve all pressure in system, lower
attachment and turn engine off.

WARNING:

Fluid under pressure!

DANGER: Battery Hazards

• Always wear eye protection
when checking the battery,
acid can cause serious injury
to skin and eyes. If contact
occurs, flush area with clean
water and call physician imme­diately. Acid will also damage
clothing.

• Hydrogen gas forms inside the
battery. This gas is both toxic
and flammable and may cause
an explosion if exposed to flame.
Always remove the negative
ground first and replace it last.

• Do not allow open flame
near the battery when
charging.

• Avoid skin contact with
battery acid.

REV F 2-2 109627CE_0512

WARNING: Read Owner’s Manual and
decals before attempting to operate this
machine.

• Wear ear protection, eye protection and safety shoes when operat­ing this equipment.

601623

• Keep hands, feet and clothing clear of
this area.

• Keep a safe distance from the machine.

• Keep shields or covers in place while
machine is in operation.

WARNING: Rotating driveshaft!

601624

• Never operate the mower deck with side
deflector damaged, altered, removed or in
raised position, except when the entire
grass catcher attachment or mulching sys­tem is being used.

WARNING: Thrown
objects

WARNING: This structure’s protective
capability may be impaired by struc­tural damage, overturn, or alteration.
If any of these conditions occur, this
structure must be replaced.

• Avoid crushing, use seat belt.

• Do not jump if machine tips.

• To minimize chance of injury or death
from rollover; keep ROPS in the raised
and locked position and use the seat
belt.

• Never operate machine on a slope
with the ROPS folded down (lowered
position).

• There is no roll over protection when
the ROPS is in the lowered position.

• Lower the ROPS only when abso­lutely necessary. Drive slowly and
carefully. Raise the ROPS as soon as
clearance permits.

• Read and follow slopes operation
instructions and warnings.

• Do not wear seat belt when the ROPS
is in the lowered position.

• Always pull from the tractor hitch.

• Do not attach chains or ropes to the
ROPS for pulling purposes, as the
machine can tip backwards.

601635

Part Number
601635

DANGER: Rotating blades,

pulleys & belts

WARNING:
Thrown objects

• Keep hands, feet and clothing away.

• Always keep shields or covers in place.

• Always maintain a
safe distance from
people and pets
when mowing.

• Always stop
machine if some­one enters the area.

109627CE_0512 2-3 REV F

601635

601415

601415

WARNING: Rollover!

• Mow a safe distance (minimum of 10
feet) away from drop-offs, retaining
walls, drainage ditches, embankments,
water, and other types of hazards to
avoid a wheel dropping over the edge or
to avoid the ground from breaking away.

WARNING: Back over!

• Always be aware of what is behind the
machine before backing up. Do not
mow in reverse unless absolutely neces­sary. Always look down and behind
before and while backing up.

• Do not carry passengers

• Always stop machine if someone enters
the area.

WARNING: Rollover!

• Do not operate on slopes
greater than 15 degrees.

• Keep all movement on slopes
slow and gradual. Never make
sudden changes in speed and
direction.

WARNING: Ejection!

• Never push down suddenly on reverse
or brake pedal while the machine is in
forward motion because machine may
tip forward causing loss of control.

• Slow down before turning.

• Wear seat belt

601415

WARNING: Ejection!

• Never drive the tractor at high speeds
without a front-end attachment mounted
to the tool bars.

• Never push down suddenly on reverse
or brake pedal while the machine is in
forward motion because machine may
tip forward causing loss of control.

WARNING: Ejection!

• Never push down suddenly on reverse
or brake pedal while the machine is in
forward motion because machine may
tip forward causing loss of control.

• Keep all movement on slopes slow and
gradual.

• Do not make sudden changes in speed
or direction.

• Keep attachment as low to the ground
as possible, mower decks should rest on
the gauge wheels.

• Keep deck gauge wheels on the ground
during transport.

WARNING: Loss of traction

• While driving on slopes, always run in
AWD (All wheel drive) locked position.

• Keep all movement on slopes slow and
gradual.

• Never make sudden changes in speed
or direction.

REV F 2-4 109627CE_0512

INTERNATIONAL SYMBOLS

Hours Recorded

Engine Water

Temperature

Increase

Decrease

Fuel Level

High Range

Low Range

Auto AWD

Full Time AWD

Engine Oil

Pressure

Air Filter

Continously

Variable

Neutral

Diesel Fuel

Lock

Release Lock

Differential Lock

Volume Empty

Engine Start

Engine Oil

Engine Stop

Glow

Parking Brake

Battery

Power Take-off

(ON)

Attachment

(Lowered)

Remote Cylinder

(Retracted)

Remote Cylinder

(Extended)

Volume Full

Control Lever

Hold

Fast

Slow

Power Take-off

(OFF)

Attachment

(Raised)

As a guide to the operation of your tractor, various international symbols have been used on instruments and controls. These

symbols are depicted and described below.

109627CE_0512 2-5 REV F

REV F 2-6 109627CE_0512

SLOPE GUIDE.

Slope Guide Lines

Line B

D (10o)

C (5o)

E (15o)

Line A

Use this diagram when determining the degree of slope to be mowed

1. Hold this sheet of paper in front of you. Make sure that Line A is horizontal.

2. Align Line B with a vertical surface such as pole, tree or building.

3. Fold the paper along the slope guide lines (C, D or E).

4. Align the closest slope guide line with the ground slope. This will give you a close estimation of the groun d slope to be
mowed.

109627CE_0512 2-7 REV F

REV F 2-8 109627CE_0512

OPERATION

Safe Operating Practices

This product is capable of amputating hands and feet and
throwing objects. Always follow all safety instructions to
avoid serious injury or death.

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Operation

 Evaluate the terrain to determine what accessories and

attachments are needed to properly and safely perform
the job. Only use accessories and attachments
approved by the manufacturer.

 Never leave a running machine unattended. Park the

machine on level ground. Place park brake lever in the
brake engaged position, place the PTO lever in the
“OFF” position, lower attachment, remove ignition
switch key before leaving operator’s seat for any rea­son including unclogging the chute.

 Do not change the engine governor setting or over-

speed the engine.

 Always remain seated while operating machine.
 Always keep safety shields and covers in place.
 Always maintain a safe di stance from people and pets

when mowing. Always stop machine if someone
enters the area.

 Always operate machine in daylight or with adequate

working lights.

 Follow daily and weekly checklists, making sure hoses

are tightly secured and bolts are tightened.

 Always observe traffic laws while driving machine

from one location to another. Watch for traffic when
operating near or crossing roadways.

 Always be alert for hazards such as rocks, metal

objects and other debris which may be thrown or
entangled by mower blades. Watch out for holes or
deep depressions.

 Inspect area to be mowed for hazards such as rocks,

metal objects and other debris which may be thrown or
entangled by mower blades. Remove these objects
before mowing.

 Always inspect machine for damage after striking a

foreign object. If damage is found, repair machine
immediately. Be sure to stop on level ground, place
park brake lever in the brake engaged position, place
the PTO lever in the “OFF” position, lower attachment,
remove ignition switch key before leaving operator’s
seat to inspect damage.

 Never engage the PTO Control Lever unless the PTO

shaft is securely connected to a power driven attach­ment.

 Always wear adequate ear protection, such as earplugs,

when operating this equipment as prolonged exposure
to uncomfortable or loud noises can cause impairment
or loss of hearing. Do not wear radios or music head­phones while operating the machinery. Safe operation
requires your full attention.

 Do not operate the equipment while wearing sandals,

tennis shoes, sneakers, shorts or any type of loose fit­ting clothing. Long hair, loose clothing or jewelry may
get tangled in moving parts. Always wear long pants,
safety glasses, ear protection and safety shoes when
operating this machine.

 Always be aware of what is behind the machine before

backing up. Do not mow in reverse unless absolutely
necessary. Always look down and behind before and
while backing up.

 Never push down suddenly on brake pedal while the

machine is in forward motion because machine may tip
forward causing loss of control.

 Never push down suddenly on the HST reverse pedal

while the machine is in forward motion because
machine may tip forward causing loss of control.

 Never drive the tractor at high speeds without a front-

end attachment mounted to the tool bars. Keep the
attachment as low to the ground as possible, mower
decks should rest on the gauge wheels.

 Never operate a poorly maintained machine.
 Never attempt high speed maneuvering, especially in

crowded or congested areas.

 Never allow persons to operate this machine without

proper instruction or allow children to operate
machine. Allow only responsible adults who are famil­iar with these instructions to operate this machine.

 Never put hands or feet under any part of the machine

while it is running.

 Never carry passengers.
 Never direct discharged material toward anyone.

Avoid discharging material against a wall or obstruc­tion. Material may ricochet back toward the operator.
Always disengage the blades and wait for them to stop
before crossing gravel drives, walks or roads.

 Always keep clear of the mower blades and attach-

ments during their operation.

 Turn off blades when not mowing.
 Slow down before turning.
 Stop the engine before removing the grass catcher or

unclogging the discharge chute. Never clear the dis­charge chute with the engine running. Turn off the
engine and be sure the blades have stopped before
cleaning. Use a stick to clear a plugged discharge area.

Never use your hand!

 Do not operate the machine while under the infl uence

of alcohol or drugs.

 Exercise caution when loading or unloading the

machine onto a trailer or truck.

 Always wear safety goggles or safety glasses w ith side

shields when operating the tractor.

 Data indicates that operators, age 60 years and above,

are involved in a large percentage of riding mower­related injuries. These operators should evaluate their
ability to operate the mower safely enough to protect
themselves and others from serious injury.

 Follow the manufacturer ’s recommendation for wheel

weights or rear counter-balance weights.

109627CE_0512 3-1 REV F

 If any attachment or additiona l weight is mounted on

the front of the unit, any rapid movement of the H ST
pedals in either direction could result in a reaction of
the tractor that can cause serious injury.

 When desconnection on attachment that uses the trac-

tor PTO output shaft to power the attachment, the pow­ered shaft of device must also be disconnected from the
tractor PTO output shaft. Never leave an unsupported
PTO device attached to the tractor PTO output shaft, if
it is not completely and properly assembled to the
attachment on which it’s use is intended.

 Clean flammable material from machine. Prevent

fires by keeping engine compartment, exhaust area,
battery, fuel line, fuel tank and operator’s station
clean of accumulated trash, grass clippings, and
other debris. Always clean up spilled fuel and oil.

Using a ramp

 Use extreme caution when loading and unloading a

unit onto a truck or trailer with a ramp.

 Use only a single, full width ramp; do not use individ-

ual ramps for each side of the unit. Having a full width
ramp provides a surface for the tractor frame to contact
if the unit starts to tip backwards. It also reduces the
risk of a wheel going off and the machine tipping over.

 Do not exceed a 15 degree angle between the ramp and

the ground or between the ramp and the trailer or truck.

 When on a ramp avoid sudden acceleration.

Slope Operation

Slopes are a major factor in loss-of-control and tip-over

accidents, which can result in severe injury or death. All
slopes require extra caution. REMINDER: Only operate
on slopes of 15 degrees or less.

 Use extreme caution when operating on slopes.

• Be extremely careful changing directions on a slope.
Slow down.

• Do not operate where the machine could slip or tip.

• Turn slowly

• Turn on the most level part of the slope

• While driving on slopes, always run in AWD (All
wheel drive) locked position.

• Never make sudden changes in speed or direction.

• If it becomes necessary to turn dow nhill, tu rn sl owly
and gradually, if possible.

 Watch for holes, ruts, bumps, rocks or other hidden

objects. Uneven terrain could overturn the machine.
Tall grass can hide obstacles.

 Remove obstacles such as rocks, tree limbs, etc.
 Keep all movement on slopes slow and gradual. Do

not make sudden changes in speed or direction.

 Avoid starting and stopping on a slope. If tires lose

traction, disengage the blades and proceed slowly
straight down the slope.

 Mow a safe distance (minimum of 10 feet) away from

drop-offs, retaining walls, drainage ditches, embank­ments, water, and other types of hazards to avoid a
wheel dropping over the edge or to avoid the ground
from breaking away. This will reduce the risk of the

machine suddenly rolling over causing serious injury
or death.

 Use a walk behind, push mower or hand-held trimmer

on slopes and near drop-offs, retaining walls, drainage
ditches, embankments and water to avoid machine roll­over and serious injury or death.

 Do not mow on wet grass. Reduced traction could

cause sliding and loss of steering control.

 If the mower’s tires lose traction when operating on

slopes, disengage the blades, engage the park brake,
turn the engine off and get help.

 Never make sudden starts, stops, turns, or reverse

direction, especially when maneuvering on slopes.
The steering is designed for sensitive response. Rapid
movement of the steering wheel or HST foot pedals in
either direction could result in a reaction of the tractor
that can cause serious injury.

 Never stop suddenly while going down slopes. This

action may result in a reaction of the tractor that can
cause serious physical injury.

 The Hustler mower is capable of operating horizontally

(traverse) on moderately steep slopes. When operating
on slopes up to 15 degrees, be aware of any conditions
that may cause the tractor drive tires to lose traction
resulting in a possible loss of control of the machine.
An operator should not operate on a slope until he is
thoroughly familiar with the equipment.

Do not operate on slopes greater than 15 degrees.

Refer to Slope Guide, page 2-7, when determining the
degree of slope to be mowed.
It is strongly recommended that the operator drive the
machine off of the slope, using extreme caution, if any
sign of loss of traction is detected. Wait until the con­dition that caused the problem is resolved before
attempting to operate on the slope again.
T errain conditions can af fect traction resulting in possi­ble loss of control of the machine. Some of the condi­tions to be aware of are:

1.Wet terrain

2.Depressions in the ground; i.e. holes, ruts, washouts

3.Mounds of dirt

4.Soil type; i.e. sand, loose dirt, gravel, clay

5.Grass type, density, and height

6.Extremely dry conditions of grass

7.Tire pressure
The attachments mounted to the tractor will also affect
the way it handles on a slope. Be aware that each
attachment’s characteristics vary.
Do not tow on slopes. The weight of the towed equip­ment may cause loss of traction and loss of steering
control.
Another consideration to safe mowing on slopes is to
be aware of what is located at the bottom of the slope.
Extreme caution should be used when there is a hazard
located at the bottom of the slope. Some examples are:

1.Water; i.e. lake, river

2.Cliffs, retaining walls

3.Roads, highways

4.Buildings

5.Rocks

REV F 3-2 109627CE_0512

These are just a few examples of situations when cau-

A

B

C

D

E

G

H

F

tion must be used when operating on a slope. There
are many other possibilities too numerous to mention.
Just remember to always exercise extreme caution
when operating on any slope.

 The ROPS will minimize chance of injury or death

from rollover. Seat belt must be fastened while oper­ating a machine equipped with ROPS in the raised

and secured position. Both retaining pins and hair
pins must be installed. Failure to use seat belt will

result in serious injury in the event of a roll over.

Children

Tragic accidents can occur if the operator is not alert to
the presence of children. Children are often attracted to
the machine and the mowing activity. Never assume that
children will remain where you last saw them.

 Never leave machine unattended with ignition key in

switch, especially with children present.

 Children or bystanders may be injured if they move or

attempt to operate the tractor while it is unattended.
Always disengage PTO lever, engage park brake, stop
tractor engine, and remove ignition key when leaving
operator’s seat.

 Keep children out of the mowing area and under the

watchful care of a responsible adult other than the
operator.

 Be alert and turn the machine off if children enter the

area.

 Before and while backing, look behind and down fo r

small children.

 Never carry children, even with the blades off. They

may fall off and be seriously injured or interfere with
safe machine operation. Children who have been
given rides in the past may suddenly appear in the
mowing area for another ride and be run over or
backed over by the machine.

 Never allow children to operate the machine.
 Use care when approaching blind corners, shrubs,

trees, the end of a fence or other objects that may
obscure vision.

 Never allow children or others in or on towed equip-

ment.

Instrument Panel

A. Electronic hour meter (Figure 3-1) — Registers 1/10

hour increments up to 9,999.9 total hours. Connected
to the ignition switch, the meter records the
accumulative time while the ignition key is switched

to the RUN position.

B. Temperature gauge and alarm (Figure 3-1) —

When the needle is in the middle area, the engine is at
its normal operating temperature. When the needle
reaches the “H” side of the gauge it indicates the
engine coolant has reached an unsafe temperature. If
this occurs, shut down the machine as soon as
possible. Never risk continued operation; high
temperatures can severely damage the engine.
The coolant temperature fluctuates depending on
ambient temperatures and working loads. If the needle

109627CE_0512 3-3 REV F

Figure 3-1

is at the “H” side during operation, the overheat alarm
buzzer sounds.

C. Fuel gauge (Figure 3-1) — This gauge indicates the

amount of fuel in the tank.

D. Glo-plug warning light (Figure 3-1) — Comes on

when turning the key switch to the “HEAT” position
or “START” position. This light will stay on for
approximately 5 seconds in the “HEAT” Position.

E. Oil pressure warning light and alarm (Figure 3-1)

— This light comes on when the ignition switch is

placed in the “RUN” position and stays lit until the
engine is running and a safe oil pressure is developed.
If light comes on during operation, shut engine off
immediately and locate and correct the problem.
When oil pressure falls below 29.4 kPa, the alarm
buzzer will sound. IMPORTANT: The operator must
occasionally check the crankcase for proper oil level.
NOTE: The alarm buzzer will sound when engine
stops with key left inserted at “RUN” position. In
order to stop the alarm buzzer, return the key to
“STOP” position.

F. Charge indicator warning light (Figure 3-1) — This

light comes on when the ignition switch is placed in
the “RUN” position and stays lit until the engine is
running. If it remains lit the charging system is not
operating normally. Investigate the cause as soon as
possible, otherwise the battery will fully discharge.

G. Air cleaner restriction warning light (Figure 3-1)

— When the air cleaner element is clogged by foreign
substances, such as dust, and clean air is restricted to
the engine, this light will illuminate. Refer to the
Engine Air Filter section of this manual for detailed
information.

H. Parking brake warning light (Figure 3-1) — When

the parking brake is applied, this light will illuminate.

Switches

A. Ignition switch (Figure 3-2) — A four position

switch: off, run, pre-heat and start. With key inserted,
rotate it clockwise to “PRE-HEAT” position and the
“ST ART” position; release key when engine starts, and
switch will automatically return to the “RUN”
position.
Turning the key to the “RUN” position activates the

Figure 3-2

Ignition switch

P

r

e

-

h

e

a

t

S

t

a

r

t

R

u

n

O

f

f

A

Head light switch

B

Throttle

A

Master brake pedal

HST foot pedals

Forward

travel
pedal

Reverse

travel
pedal

B

E

Figure 3-3

warning lights and instruments.

B. Head light switch (Figure 3-3) — This switch is

located under the instrument panel. Push the switch in
and rotate the ignition key to the “RUN” position to
turn on the head lights.

Controls

A. Throttle control (Figure 3-4 — A cable is linked to

engine throttle for controlling engine speed. Move
lever forward to increase engine rpm, move lever
rearward to decrease engine rpm. NOTE: Always
operate the mower deck or attachment at full engine
RPM.

B. Master brake pedal (Figure 3-5) — Depress the

master brake pedal to stop the unit.
NOTE: The cruise control switch will be returned to
the “OFF” position by depressing the master brake
pedal, if the cruise control switch is in the “SET” posi­tion.

C. Park brake (Figure 3-6) — The park brake should be

applied whenever the tractor is parked or when the
operator is out of the seat. To set the park brake, pull
up on the park brake lever. To release the park brake,

press on the brake lever release button while pushing
down on the park brake lever.

REV F 3-4 109627CE_0512

Figure 3-4

Figure 3-5

WARNING: Do not park on a slope. If necessary to

park on a slope fully engage the park brake and be
sure to block or chock the wheels to prevent acci­dental rolling of the machine.

D. Differential lock pedal (Figure 3-7) — Depressing

the pedal, locks the front axle shafts together,
providing additional traction in wet or loose soil.

WARNING: The tractor is very difficult to steer
with the differential lock applied.

E. Hydrostatic transmission (HST) foot pedals (Figure

3-5) — The ground speed of the unit is continuously

Figure 3-6

Park brake lever

Release button

C

Differential lock pedal

D

F

Transmission selector lever shown

in the Automatic AWD position

G

Transmission selector lever shown

in the locked AWD position

High range

Low range

G

Figure 3-8

Figure 3-9

Figure 3-7

variable from zero to full rated speed in each range.
The ground speed is controlled by these pedals.
Depress the forward travel pedal to progressively
increase forward speed. For reverse travel, depress the
reverse travel pedal. NOTE: These pedals must be in
neutral (not depressed) to start the engine.

F. Cruise control switch (Figure 3-8) — Used to

maintain a constant forward speed. After attaining the
desired speed with the forward travel pedal, put the
switch to the “ON “position, and the unit will maintain
the set speed when the pedal is released.
To cancel the speed setting or stop the unit, put the
cruise control switch to the “OFF” position or firmly
depress the master brake pedal.

WARNING: To avoid injury, the cruise control
switch should not be put in the “ON” position
when operating at transport speed or when in
reverse.

109627CE_0512 3-5 REV F

Figure 3-10

G. Transmission Selector lever (Figure 3-9 & Figure 3-

10) — The Range Selection and the All Wheel Drive

(AWD) Selection are controlled by the Transmission
Selector lever. This lever can only be shifted when the
HST foot pedal is in the Neutral position
When the Transmission Selector lever is located in the
inside slot, the tractor will run in Automatic AWD
mode. When the lever is in this position there are
three settings: High range (H), Low range (L) and
Neutral.

Range Forward Reverse

PTO Control Lever

Tool Bar Lift
Control Lever

Weight

Transfer

Control

I

H

J

Low . . . . . . . . .0 - 9.7kph. . . . . . . . . . . . . . 0 - 6.3kph

High. . . . . . . . .0-24.5kph. . . . . . . . . . . . . 0 - 15.8kph

When the lever is placed in the outer slot, the tractor
will run in Locked AW D mode. When the lever is in
this position, the rear axle drive is activated for
improved traction in adverse conditions.
NOTE: When mower is in Locked AWD mode, only
low range is engaged.

WARNING: When driving on slopes, always oper­ate in the Locked A WD mode.

H. PTO Control lever (Figure 3-11) — This lever

engages and disengages the PTO. Move the lever
forward and hold it to engage the PTO. Move the lever
rearward to disengage the PTO.
a. PTO must be in disengaged position to start the

engine ( See “PTO stop system:” on page3-7).
IMPORTANT: Do not repeatedly engage and dis­engage the PTO when Mower becomes clogged.
Doing so may cause PTO clutch failure. If Mower
becomes clogged, stop the engine, remove starter
key and clean underside of deck using a probe, not
your hand.
IMPORTANT: When PTO lever is engaged and
operator raises the front attachment, if attachment
is raised all the way up, the PTO will automatically
be disengaged. This is a tractor safety feature!

I. Tool Bar Lift Control lever (Figure 3-11) — The

front mounted equipment can be raised and lowered by
the tool bar lift control lever. Place handle in the
forward position to lower and to the rearward position
to raise front mounted equipment.
To lower and float the equipment, push the lever
forward. To raise the equipment, pull the lever
rearward and hold it until the equipment is raised to the
desired position.

Steering wheel adjustment

The 3700 is equipped with an adjustable steering wheel

which can telescope and tilt.

To telescope the wheel, turn the wheel hub to the left and
raise or lower the steering wheel to the desired height. Then
turn the hub to the right to lock it into p osition. (Figure 3-15)
NOTE: When locking the hub into position, do not
overtighten.

To tilt the wheel, pull up on the lever and move the steering
wheel fore or aft the desired position. If the wheel is not held
in position when the lever is raised, the steering wheel will
spring to its most forward position. Use this feature to gain
additional clearance when mounting and dismounting the
tractor. (Figure 3-16)

Safety start interlock system

The tractor is equipped with a safety start interlock system
consisting of the brake switch, seat switch, PTO switch and
transmission neutral switch.

WARNING: To avoid personal injury, disengage
the PTO Control lever before operating the Tool Bar
Lift Control lever.

J. Weight Transfer Control (Figure 3-11) — This

feature enables the operator to transfer the weight of
the deck or other equipment to the tractor unit.
Turn the knob clockwise, the effort of weight transfer
is increased, refer to the Weight Transfer Valve section
for additional information.

Seat adjustment

The seat can be adjusted four different ways to obtain the

most comfortable position:

1. Back angle (Figure 3-12)

2. Forward and rearward travel (Figure 3-13)

3. Weight (Figure 3-13)

4. Lumbar (Figure 3-14)

REV F 3-6 109627CE_0512

Figure 3-11

Check tractor safety start interlock system daily, prior
to operation. This system is an important tractor safety

feature. It should be repaired immediately if it malfunction s.
The machine incorporates a separate seat switch which will
stop the tractor engine when the operator is unseated for any
reason while the tractor is operating. This is a safety feature
designed to prevent runaway or accidental entanglement.

Raising off the seat, the engine will stop whenever
operating PTO driven equipment such as the mower deck.
Also the engine will stop when raising off the seat unless the
parking brake or master brake pedal is applied.

6. Disengage the park brake and with the PTO

Back angle

Weight

Forward &

rearward travel

Lumbar

Hub

disengaged, slowly raise off of the seat. The engine
should stop.

7. Engage the park brake and the PTO, slowly raise off of
the seat. The engine should stop.

8. If the engine fails to stop and the operator is off the

seat, check the function of the seat switch. If the seat
switch is not operating properly (is not opening or
closing) and if the cause can not be determined, replace
the seat switch.
If the problem can not be located, contact your Hustler
Dealer.

WARNING: The safety interlock system should
always function per steps 2 thru 6. If it does not
function properly, it should be corrected immedi­ately. Do not operate machine without properly
functioning seat safety switch.

Figure 3-12

Figure 3-13

PTO stop system:

While operating PTO driven equipment, the PTO will
disengage automatically when the equipment is raised by the
lift control lever to the maximum lift height.

NOTE: The PTO control lever remains in the engaged

position after activating the PTO stop device (the PTO shaft
will no longer rotate). To re-engage the PTO, the PTO control
lever must be moved to the “OFF” position, then pushed for­ward again.

To inspect the PTO stop system:

1. The operator must be on the seat when testing the PTO

switch.

WARNING: Perform this test in an area free of any
bystanders.

2. Set the park brake.

3. Start the engine and allow it to warm up to operating

temperature.

Figure 3-14

To inspect the safety start interlock system:

1. Park the unit on a flat, level surface.

2. The operator must be on the seat when testing the seat

switch.

3. Engage the park brake.

4. Start the engine and allow it to warm up to operating

temperature.

5. With the PTO disengaged, slowly raise off of the seat.
The engine should continue to run.

109627CE_0512 3-7 REV F

Figure 3-15

4. With the PTO engaged, slowly raise the attachment
using the Tool Bar Lift Control Lever. The PTO

should stop when the attachment is raised to it’s

Figure 3-16

Tilt wheel

Upper nut

Bracket

Lower nut

Cable

Upper nut

Bracket

Lower

nut

PTO Safety Cable

RH lift cylinder

RH lift

arm

maximum lift height. If it does not stop refer to the
PTO Safety Shut-off System section for more
details.

operating correctly. If resistance is encountered, then
the cable needs to be adjusted.

3. The PTO safety shut-off cable adjustment is located

behind the right front wheel and can be reached
without removing the wheel. With the PTO
disengaged, adjust the cable by loosening the lower nut
and turning the top nut so that the cable is pushed down
into the bracket. Tighten the lower nut against the
bottom of the bracket. Figure 3-17 & Figure 3-18

4. After adjustment, repeat Steps 2 and 3 until the PTO

Safety Shut-off System is working properly.

WARNING: For safe operation, do not attempt to
override or bypass either of these systems. If either
system fails to function, it should be repaired before
using the unit.

PTO safety shut-off system

The 3700 power units are equipped with a cable operated
system that will disengage the PTO when the right lift arm
reaches a point near maximum lift. This shut-off system
provides protection to the driveline of the attachment and
prevents the deck from operating when the mower deck (or
other powered attachment) has been raised to the maximum or
flipped up for service. Figure 3-11 & Figure 3-18

This system disengages the linkage between the PTO
control lever and the PTO lever on the transmission but, it
does not move the PTO control lever from the PTO engaged
position to the disengaged position.

If the PTO Safety Shut-Off System is activated during
operation, the operator need only lower the attachment, pull
the PTO control lever back to the disengaged position and
then move it forward again to re-engage the PTO.

It should be tested before first operating a new attachment
and, if necessary, adjusted every 100 hours of operation or
whenever the operator notices the PTO Safety Shut-Off
System is not operating correctly. NOTE: The power unit
does not have to be running to test the system.

To test the system:

1. Raise the lift arms to the maximum lift position.

2. Turn off the engine and engage the PTO control lever

by pushing it forward. If no resistance is encountered
when moving the PTO control lever forward into the
engaged position the PTO Safety Shut-Off System is

Figure 3-17

Figure 3-18

Engine starting

The 3700 safety start interlock system is designed to protect
the operator and others from accidental injury due to
unintentional engine starting. The engine starting motor will
not engage until:

1. The operator is seated

2. HST foot pedals are released (neutral position)

3. PTO lever is in the disengaged “OFF” position

4. The master brake pedal is depressed or park brake

lever is engaged.

REV F 3-8 109627CE_0512

NOTE: For safe operation the front mounted equipment

should be lowered prior to starting the engine.

WARNING: Never attempt to start the engine while
standing beside the unit. Always sit in the seat
when starting the engine.

IMPORT ANT: Do not engage the starter continuously for

more than 30 seconds, doing so may cause starter failure. An
interval of at least two minutes should be allowed between
such cranking periods to protect the starter from overheating
and burn-out.

WARNING: The safety interlock system must not
be disconnected or bypassed. Doing so could cause
the machine to operate unexpectedly resulting in
personal injury.

NOTE: The operator’s seat is equipped with a separate

safety switch. If for any reason the operator should become
unseated when the brake is disengaged or the PTO is engaged
the engine will stop.

The following steps are the correct procedures for starting
the engine. If difficulty is encountered, contact the Hustler
Dealer in your area.

NOTICE: Ether, or other starting fluids, must never be used
as a starting aid with this engine. Warranty will be denied
when engine damage results from such use.

Warm weather starting

To start a cold engine in warm weather or to start an engine
that is warm;

1. Depress the master brake pedal fully and move the

PTO and transmission selector levers to the off and
neutral positions.

2. Move the hand throttle forward to a near half open

position.

3. Turn the key switch to the “START” position. When

the engine starts, release the key. Check to be sure the
warning lights go out. If the engine fails to start after
cranking for approximately 10 seconds, refer to the
following COLD WEATHER STARTING
information.

4. Allow the engine to idle a few minutes before

advancing the throttle and/or engaging the PTO. In
cold weather, run the engine at half throttle for a few
minutes to allow engine oil and transmission oil to
warm-up.

Cold weather starting

If the engine fails to start using the preceding warm weather
starting procedure or when starting the engine in cold
weather;

1. Depress master brake pedal fully and move the PTO

and transmission selector levers to the off and neutral
positions.

2. Move the hand throttle forward to the full-open

position.

3. Turn the key switch to “HEAT” to preheat the

precombustion chamber and wait until the glow plug
indicator warning light on the instrument panel goes

out (approximately 5 seconds).

4. Turn the key switch to the “START” position. When

the engine starts, release the key. Check to be sure the
warning lights go out.

IMPORTANT: In cold weather below 5 degrees C start

the engine after holding the key switch to the “HEAT” posi­tion for approximately 10 seconds even if the glow plug i ndi­cator warning light has gone out.

Starting the engine with jumper cables

WARNING: Start engine only from the operator’s

seat.

WARNING: If ice is present or the battery is
cracked, Do not attempt to jump start the vehicle.

If it is necessary to use jumper cables to start the engine,

follow the instructions below.

1. Bring helper vehicle with a battery of the same voltage
as disabled machine within easy cable reach.— The

vehicles must not touch.

2. Shield eyes.

3. Connect one end of the jumper cable to the battery

positive (+) terminal and the other to the auxiliary
battery positive (+) terminal. Connect one end of the
other cable first to the auxiliary battery (-) negative
terminal, and the other end to the Hustler tractor frame.
Follow the starting procedures above after the jumper
cables are connected as instructed.

4. After engine has started, disconnect the negative
jumper cable before disconnecting the positive jumper
cable(s).

WARNING: Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.

WARNING: Charge batteries in an open well venti­lated area, away from spark and flames. Unplug
charger before connecting or disconnecting from the
battery. Wear protective clothing and use insulated
tools.

WARNING: Avoid skin and clothing contact with
battery acid.

109627CE_0512 3-9 REV F

WARNING: Always wear eye protection when
checking the battery, acid can cause serious injury to
skin and eyes. If contact occurs, flush area with
clean water and call physician immediately. Acid
will also damage clothing.

Do not drink the battery electrolyte.
Do not allow open flame near the battery when
charging.
Hydrogen gas forms inside the battery. This gas is
both toxic and flammable and may cause an explo­sion if exposed to flame. Always remove the nega­tive ground first and replace it last.
Do not overfill battery.
Electrolyte may overflow and damage paint, wiring
or structure. When cleaning the battery, use soap
and water. Be careful not to get soap and water into
the battery. Clean the battery terminals with a solu­tion of four parts water and one part baking soda
when they become corroded.

WARNING: Shorts caused by battery termin als or
metal tools touching metal tractor components can
cause sparks. Sparks can cause a battery gas explo­sion which will result in personal injury.

Prevent the battery terminals from touching any
metal tractor parts when removing or installing the
battery.
Do not allow metal tools to short between the bat­tery terminals and metal tractor parts.

WARNING: Incorrect battery cable routing could
cause damage to the tractor and battery cables. This
can cause sparks which can cause a battery gas
explosion which will result in personal injury.

Always disconnect the negative (black) battery
cable(s) before disconnecting the positive (red)
cable(s).

WARNING: Always connect the positive (red) bat-
tery cable(s) before connecting the negative (black)
cable(s).

Engine warm up

In cold weather, run the engine at half throttle for a few

minutes to allow engine oil and transmission oil to warm up.

WARNING: Never leave the machine running unat­tended.

Stopping the engine

WARNING: Always apply the park brake when

leaving the seat.

Stopping the engine should be done according to the

following procedures;

1. Pull the throttle lever fully rearward to the low idle

position.

2. Release the HST foot pedals.

3. Engage the parking brake.

4. Place the transmission selector and lift control levers in

the “N” position.

5. Turn the key start switch to the “OFF” position.

6. Remove the key.

IMPORTANT: Failure to turn the key start switch to the

“OFF" position, after the engine stops, will allow the warning
lights to remain on, causing the battery to discharge.

IMPORTANT: Do not stop the engine immediately after

hard or extended operation. Keep the engine running at slow
idle for about 2 minutes to allow engine to cool down.

Operating the hydrostatic transmission and
PTO

Hydrostatic transmission

The hydrostatic transmission is controlled by the HST foot
pedals, cruise control switch, and transmission selector lever.
Figure 3-5, Figure 3-8 & Figure 3-9

When operating the transmission selector lever, place the
HST foot pedals in the neutral position. If it is difficult to
engage, slightly depress the Forward or Reverse foot pedal for
smooth engagement.

Never engage or disengage the transmission selector lever
when the unit is in motion.

With the transmission selector lever in “H” range (Figure 3-

10), ground speed can be varied from zero to maximum by
depressing the forward or reverse travel pedal. In “L” range,
speeds are about 60% of “H” range. Maximum speeds in
reverse are about a 65% of maximum forward speeds.

To stop the unit, release the pedal gradually (except on an
emergency). When released, the pedal returns to the Neutral
position automatically, stopping the unit. Sudden release can
result in an abrupt, and possibly dangerous stop.

For prolonged operation at a fixed forward speed, use the
forward travel pedal to attain the desired speed, then move the
cruise control switch to the “ON” position. Speed will remain
at the set value when the pedal is released.

To cancel the speed setting or stop, push the switch to the
“OFF” position or firmly depress the master brake pedal.

Automatic or Locked All Wheel Drive (AWD)

The transmission selector lever is used to select Automatic
Four-Wheel Drive or Locked Four-Wheel Drive.

When the Transmission Selector lever is located in the
inside slot, the tractor will run in Automatic AWD mode.
Figure 3-9

When the lever is placed in the outer slot, the mower will
run in Locked AWD mode and low range. Figure 3-10

When in motion, always bring the unit to a complete stop
before moving the transmission selector lever.

Automatic All Wheel Drive (AWD) means that the four­wheel drive line is engaged automatically when the front
wheels start to slip, but, in normal operation, reverts to 2WD,
this provides sharp and smooth turns without damaging turf.

Locked Four-Wheel Drive should be used when additional
traction is required while operating in loose soil, wet, slippery

REV F 3-10 109627CE_0512

conditions or slopes.

Auxiliary control

valve levers

NOTE: The steering (rear) axle is not powered in reverse

when tractor is operating in Automatic AWD.

Power take-off operation

The power take-off (PTO) transfers engine power directly

to the PTO equipment.

PTO is controlled through the PTO lever. To engage the
PTO, push the lever forward. To disengage the PTO, pull the
lever rearward. Figure 3-11

NOTE: The PTO lever must be placed in the disengaged

position to start the tractor.

Operating the differential lock

Do not engage the differential lock when ground speed is
above 8 kmh. Figure 3-7The differential lock is engaged by
depressing the differential lock pedal. Depressing the pedal
locks both differential gears together, preventing one wheel
from rotating independently of the other. The lock should be
used to obtain additional traction from the opposite wheel
whenever one wheel begins to slip in wet or loose soil.

NOTE: The differential lock pedal only locks the front

axle when applied. The rear axle is not lockable.

To operate the differential lock depress and hold down the
pedal until the lock is positively engaged. It is best to engage
the differential lock while the wheels are turning slowly to
minimize shock loads to the drive line. If a wheel spins at
high speed, as on ice, reduce engine speed to idle before
engaging the lock, or damage may occur. The differential
lock is released when the pedal releases as the loads equalizes
on both drive wheels.

NOTE: In some instances the lock may remain engaged

after the pedal is released. This may occur if one front wheel
tends to turn at a faster speed than the other. Should this hap­pen, the lock may be disengaged by decreasing the drawbar
pull by raising or disengaging the implem ent so that neither
wheel tends to slip.

Operating the hydraulic lift system

The hydraulic lift system provides hydraulic power for
raising front mounted equipment whenever the engine is
running.

To raise the front mounted equipment, pull the lift control
lever rearward and hold it until the desired equipment height
is reached. Figure 3-11

To lower the equipment, push the lever forward. When
pushed all the way forward, the lever will remain in a lowered
float detent position.

IMPORTANT: Always set the lift control lever in the

float detent position when mowing.

WARNING: To avoid personal injury, keep chil­dren and others away when operating PTO equip­ment.

WARNING: Do not engage the differential lock
when turning the unit. If the lock is engage when
turning, a loss of steering control will result.

WARNING: Make sure the area is clear of people
before raising or lowering equipment.

WARNING: Always lower the hydraulic lift and
equipment before stopping the unit.

Weight transfer valve

The weight transfer valve is used to transfer the front
attachment weight to the tractor unit to reduce equipment
weight on turf and prevent damage and improve front drive
wheel traction. Figure 3-11

The weight transfer valve should be used according to the
following procedures;

1. With the engine running, push the hydraulic lift lever

forward to the floating position.

2. Turn the adjusting knob clockwise until the mower or

other equipment lifts off the ground.

3. Turn the adjusting knob counter-clockwise slowly until

the mower deck front gauge wheels or other equipment
just touches the ground, then turn the knob counter­clockwise 1/4 turn more.

4. Operate the unit over uneven terrain at desired travel

speed and observe the mower deck’s front gauge
wheels. If the wheels or equipment do not follow
ground contour, the operation will be affected.

5. To correct this condition, turn the knob 1/4 turn

clockwise at a time until the mower deck’s front gauge
wheels follow the ground contour.

Auxiliary hydraulic valve kit (optional)

An Auxiliary Hydraulic Valve kit is available from your
Hustler Dealer, as an option. When using the auxiliary valve,
the lift control lever must remain in neutral. Figure 3-19 and
Figure 3-20

Figure 3-19

This kit includes control valves, hoses and quick connect
couplers for supplying hydraulics power to optional
attachments. When not in use, the coupler dust covers must be

109627CE_0512 3-11 REV F

Figure 3-20

Quick couplers

Inside lever

Port A

Inside lever

Port B

Outside lever

Port A

Outside lever

Port B

Weights

A/R

Weight attaching bracket

ROPS

in place to prevent contamination. Always replace them
immediately if damaged or lost. Note the hydraulic circuit
connectors called out in Figure 3-20.

Once connected, the operator has control of the
attachment’s hydraulic cylinder by means of the valve control
levers. If stroking the valve lever produces the wrong cylinder
movement (up-down, right-left, etc.), reverse the attachment
hoses at the quick connect couplers. Use of the valve control
lever varies with each attachment and is described in more
detail in the operating instructions provided with the
attachment.

WARNING: Never attempt to connect or discon­nect the couplers with the hydraulics engaged and
the system oil under pressure.

Rear counter-balance weights

WARNING: Improper operation on slopes can

cause injury. Install rear counter-balance weights,
when the attachment is installed, to increase stabil­ity. Use extreme care when operating on slopes.

Figure 3-21

NOTE: Inspect the ROPS after the first 20 hours of opera-

tion. Following the initial inspection, check the ROPS after
every 500 hours of operation or every six months, w hichever
comes first. Figure 3-22

1. Check the torque of the ROPS mounting bolts. Tighten

the bolts to the correct torque of 97 Nm if necessary.
Figure 3-23

2. Inspect the operator’s seat and the mounting parts for

the seat belt. Tighten the bolts to the correct torque of

50.0 Nm if necessary and replace parts that show wear
or damage.

Rear counter-balance weights are required to improve
stability, steering and traction. They also reduce tire lift off
when attachments are raised, operated on slopes or during an
abrupt stop. Refer to Figure 3-21 for weight attachment.

Refer to the attachment’s owner’s manual for the proper
weight amount and weight part number.

ROPS
(Roll Over Protective Structure)

A Roll Over Protective Structure (ROPS) and seat belt are
standard equipment. Do not remove the ROPS and seat belt.
ROPS when used with seat belt is effective in reducing
injuries during unit overturn accidents. Overturning the unit
without ROPS can result in serious injury or death.

REV F 3-12 109627CE_0512

Figure 3-22

The two-post ROPS can be pivoted down by removin g the
right and left retaining rings and pulling out on the pins so that
the machine can operate under low hanging tree limbs or
other obstructions. (Figure 3-24) Do not wear the seat belt
when the ROPS is in the lowered position. Use the ROPS in

the “folded” position only when it is absolutely necessary.

Figure 3-23

Bolts

ROPS

Bolts

Retaining pin

ROPS

WARNING: Do not operate the mower with the

ROPS folded (lowered position) as a standard oper­ating mode. A folded ROPS does not provide roll­over protection.

WARNING: Always wear your seat belt unless the
tractor is not equipped with a ROPS or safety cab or
if the ROPS is folded down. In this case, the seat
belt should never be worn.

WARNING: To minimize chance of injury or death
from rollover: keep ROPS in the raised and locked
position and use the seat belt.
Never operate machine on a slope with the ROPS
folded down (lowered position).
There is no roll over protection when the ROPS is in
the lowered position.
Lower the ROPS only when absolutely necessary.
Drive slowly and carefully . Raise the ROPS as soon
as clearance permits. Read and follow slope opera­tion instructions and warnings.
Do not wear seat belt when the ROPS is in the low­ered position.

3. extreme or unusual wear

4. significant discoloration due to UV exposure

5. dirt or stiffness

6. abrasion to the seat belt webbing

7. damage to the buckle, latch plate or hardware.

8. or any other problem

If the seat belt is to be cleaned, use soap and water. Do not
use carbon tetrachloride, naphtha, etc., as these will weaken
the webbing. For the same reason, do not bleach or dye the
webbing. Replace seat belt if worn or damaged.

Possible damage to the ROPS

If the unit has rolled over or the ROPS has been in some
other type of accident (such as hitting an overhead object
during transport), the ROPS must be replaced to retain the
best protection.

Following an accident, check the ROPS, the operator’s seat,
and the seat belt and seat belt mountings for possible damage,
Before operating the machine, replace all damaged parts.

IMPORTANT: Do not attempt to weld or straighten the

ROPS.

WARNING: If the ROPS or cab is removed or
replaced, make sure that the proper hardware is used
and the recommended torque values are applied to
the attaching bolts.

WARNING: The ROPS structure’s protective
capability may be impaired by structural dam­age, overturn or alteration. If any of these condi­tions occur, this structure must be replaced.

WARNING: Do not remove or alter any of the
ROPS parts. Failure to adhere to these instructions
could result in severe injury or death. Do not
attempt to weld or straighten ROPS. Failure to
adhere to these instructions could result in severe
injury or death..

WARNING: Always pull from the tractor hitch. Do
not attach chains or ropes to the ROPS for pulling
purposes,as the machine can tip backwards.

Always fasten seat belt during operation of the machine

with ROPS in “raised/up” position. Figure 3-22

Inspect the area to be mowed for proper overhead clearance

(tree limbs, guy wires, doorways, etc)

Do not contact any overhead object with the ROPS.

Inspect the seat belt system (all seat, seat belt parts, seat pan
and seat pan latch) daily prior to mowing for signs of any
damage. These parts should be replaced if any parts indicate
signs of:

1. cuts

2. fraying

109627CE_0512 3-13 REV F

Figure 3-24

REV F 3-14 109627CE_0512

MAINTENANCE & ADJUSTMENTS

Safe Servicing Practices

This product is capable of amputating hands and feet and
throwing objects. Always follow all safety instructions to
avoid serious injury or death.

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Service

 Unless specifically required, DO NOT have engine

running when servicing or making adjustments to
power unit. Park the machine on level ground. Place
park brake lever in the brake engaged position, place
the PTO lever in the “OFF” position, lower attachment,
remove ignition switch key and disconnect negative
battery cable before doing any maintenance. Wait for
all movement to stop before adjusting, cleaning or
repairing. Repairs or maintenance requiring engine
power should be performed by trained maintenance
personnel only. To prevent carbon mon oxide poison­ing, be sure proper ventilation is available when engine
must be operated in an enclosed area. Read and
observe safety warnings in front of manual.

 Before working on or under the deck, make certain

engine cannot be accidentally started. Shut engine off,
remove ignition switch key, engage park brake and dis­connect negative battery cable for maximum safety.
Repairs or maintenance requiring engine power should
be performed by trained maintenance personnel only.

 Always keep safety shields and covers in place.
 Use a stick or similar instrument to clean under the

mower making sure that no part of the body, especially
arms and hands are under mower.

 Keep your machine clean and remove any deposits of

trash and clippings, which can cause engine fires and
cooling system overheating as well as excessive belt
wear. Clean up oil or fuel spillage. Allow machine to
cool before storing.

 Clean flammable material from machine. Prevent

fires by keeping the top of the deck, engine com­partment, radiator screen, front screen, exhaust
area, battery, hydraulic lines, fuel line, fuel tank
and operator’s station clean of accumulated trash,
grass clippings, and other debris. Always clean up
spilled fuel and oil.

 Always wear adequate eye protection when servicing

the hydraulic system, cooling system, battery or when
grinding mower blades and removing accumulated
debris.

 Use extra caution when handling diesel fuel. It is flam-

mable and vapors are explosive.

 Never attempt to start engine when there is a strong

odor of diesel fumes present. Locate and correct
cause.

 Never remove fuel cap or refuel power unit while

engine is running; never refuel near an open flame or
near devices which can create a spark. Refuel outdoors .

Never refuel or drain the fuel from the machine
indoors.

 Never run the engine in an enclosed area unless

exhaust is vented to the outside. Exhaust gases contain
carbon monoxide which is odorless and deadly poison.

 Never attempt to make any adjustments or repairs to

the power unit drive system, mower deck or any attach­ment while the power unit engine is running or PTO is
engaged. Repairs or maintenance requiring engine
power should be performed by trained maintenance
personnel only.

 Never work under the machine or attachment unless it

is safely supported with jack stands. Make certain
machine is secure when it is raised and placed on the
jack stands. The jack stands should not allow the
machine to move when the engine is running and the
drive wheels are rotating. Use only certified jack
stands. Use only appropriate jack stands, with a mini­mum weight rating of 3500 pounds to block the unit
up. Use in pairs only. Follow the instructions supplied
with the vehicle stands.

 Do not touch hot parts of machine.
 Keep nuts and bolts tight, especially the blade attach-

ment bolts. Keep equipment in good working condi­tion.

 Never tamper with safety devices. Check their proper

operation daily.

 Stop the engine before removing the grass catcher or

unclogging the discharge chute. Never clear the dis­charge chute with the engine running. Turn off the
engine and be sure the blades have stopped before
cleaning. Use a stick to clear a plugged discharge area.

Never use your hand!

 Grass collection system components are subject to

wear, damage and deterioration, which could expose
moving parts or allow objects to be thrown. Frequently
check components and replace with manufacturer’s
recommended parts, when necessary.

 Exercise caution when working under the deck as the

mower blades are extremely sharp. Wrap the blade(s)
or wear gloves and use extra caution when servicing
them. Take care as the rotation of one blade can cause
the other blades to rotate.

 Use only genuine Hust ler replacement parts to ensure

that original standards are maintained

Introduction

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Regular maintenance is the best prevention for costly
downtime or expensive, premature repair. The following
pages contain suggested maintenance information and
schedules which the operator should follow on a routine basis.
For more detailed information order the correct parts manual
for your unit. Refer to the Product Literature section of this
manual.

Remain alert for unusual noises, they could be signaling a

109627CE_0512 4-1 REV F

problem. Visually inspect the machine for any abnormal
wear or damage. A good time to detect potential p roblem s is
while performing scheduled maintenance service. Correcting
the problem as quickly as possible is the best insurance.

Clear away heavy build-up of grease, oil and dirt,
especially in the engine and under the seat platform areas;
minute dust particle are abrasive to close-tolerance engine
and hydraulic assemblies.

Daily inspect mower for grass clippings and wire and
string tangles. The underside of the mower deck will collect
a build-up of grass clippings and dirt, especially when grass
is wet or has high moisture content. This build-up will
harden, restricting blade and air movement and will probably
show a poorer quality of cutting. Therefore it should be
removed routinely.

To do this it will be necessary to raise and block the deck,
using jack stands or blocks, in the full up position and scrape
the build-up from underneath. Refer to the deck owner’s
manual for more detailed information.

Some repairs require the assistance of a trained service
mechanic and should not be attempted by unskilled
personnel. Consult your Hustler service center when
assistance is needed.

Torque values

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

WARNING: Particular attention must be given to
tightening the drive wheel lug bolts and blade spin­dle bolts. Failure to correctly torque these items
may result in the loss of a wheel or blade, which
can cause serious damage or personal injury.

Torque values are given below:

Nm

Wheel (lug) bolts - front . . . . 115-129

Wheel (lug) bolts - rear . . . . . 88.1-101.7

Deck blade (top) bolts . . . . . .88.1-101.7

Deck blade (bottom) bolts . . .160.01

Lubrication

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Engine Oil. . . . . . . . . . . . . . . See Chart below

Transmission Oil. . . . . . . . . . ISO VG 46

Grease. . . . . . . . . . . . . . . . . . SAE multi-purpose grease

Recommended oils

Ambient Temperature Recommended oil

+4.4° — 48.9°C SAE 30W

+12.2° — 48.9°C SAE 15W-40

-23.3° — 48.9°C SAE 10W-30

-28.9° — -15.6°C SAE 5W-30

NOTE: Engine originally shipped with 10W-30 oil.

Lubrication fittings

NOTE: After every 50 hours of normal operation, apply a

good quality grease to the lubrication points listed below
(refer to the Recommended Lubricants chart). When operat­ing under extremely dirty conditions, lubricate more fre­quently than every 50 hours.

• Lift cylinder

• Front Lift arm

• Power Steering Cylinder

• Brake pedal shaft

• Differential Lock pedal shaft

To lubricate these points:

1. Wipe away all old grease and dirt from the lubrication

fittings to prevent dirt or foreign material from
entering as new grease is applied.

2. Use a high pressure grease gun to force in the new

grease. Apply pressure until clean grease oozes from
each lubrication point.

3. Wipe away any excess grease.

Service access

Lug bolts only - It is recommended that these be checked
after the first 2 hours of operation, initially, every 50 hours
and following removal for repair or replacement.

For all other torques refer to the various power unit parts
manuals for standard torque chart. See the Product Literature
section of this manual for ordering information.

For engine torque values, see engine service manual.

Tires

It is important that the tires have an equal amount of air
pressure. The recommended pressure are:

Front wheels. . . . . . . . . . . .96-124 KPa

Rear wheels . . . . . . . . . . . .96-124 KPa

Solid fill tires are not recommended for Hustler turf
equipment. On any machine, with solid filled tires, the
warranty claim will be denied.

REV F 4-2 109627CE_0512

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Opening the hood

WARNING: To avoid personal injury from contact

with moving parts:

Never open the hood and seat while the engine is
running.
Do not touch the muffler or exhaust pipe while they
are hot; severe burns could result.

Release the clamp to unlock the hood latch. Raise the hood

using the hood handle. Figure 4-1

Close the hood and clamp the hood latch.

Opening the seat platform

Pull out on the seat release knob and pivot the seat platform

Hood latch

Clamp

Seat

release

knob

forward. Figure 4-2

Figure 4-1

WARNING: Avoid skin and clothing contact with

battery acid.

Always wear eye protection when checking the bat­tery, acid can cause serious injury to skin and eyes.
If contact occurs, flush area with clean water and
call physician immediately. Acid will also damage
clothing.
Do not drink the battery electrolyte.
Do not allow open flame near the battery when
charging.
Hydrogen gas forms inside the battery. This gas is
both toxic and flammable and may cause an explo­sion if exposed to flame. Always remove the nega­tive ground first and replace it last.
Do not overfill battery.
Electrolyte may overflow and damage paint, wiring
or structure. When cleaning the battery, use soap
and water. Be careful not to get soap and water into
the battery. Clean the battery terminals with a solu­tion of four parts water and one part baking soda
when they become corroded.

WARNING: Sho rts caused by battery terminals or
metal tools touching metal power unit components
can cause sparks. Sparks can cause a battery gas
explosion which will result in personal injury.

Figure 4-2

Electrical system

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

The electrical system is a 12-volt DC system with negative

ground.

The recommended battery size is a BCI group 35, 12-volt
battery with a minimum cold cranking ability of 490 amps at ­18°C. A maintenance-free battery is recommended.
Otherwise, follow battery manufacturer’s maintenance,
safety, storing and charging specifications. Refer to
Maintenance Locator Chart found elsewhere in this manual.

WARNING: Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.

WARNING: Charge batteries in an open well venti­lated area, away from spark and flames. Unplug
charger before connecting or disconnecting from the
battery. Wear protective clothing and use insulated
tools.

Prevent the battery terminals from touching any
metal power unit parts when removing or inst alling
the battery.
Do not allow metal tools to short between the bat­tery terminals and metal power unit parts.

WARNING: Incorrect battery cable routing could
cause damage to the power unit and battery cables.
This can cause sparks which can cause a battery gas
explosion which will result in personal injury.

Always disconnect the negative (black) battery
cable before disconnecting the positive (red) cable.
Always connect the positive (red) battery cable
before connecting the negative (black) cable.

Alternator

The 3700 40-amp alternator is belt-driven from the engine
crankshaft pulley. It is important that belt slippage does not
occur, or the charging system will be affected. Figure 4-3

To adjust the belt, see the instructions given under the Fan
Belt section located elsewhere in this manual.

Other than belt adjustment, the only al ternator maint enance
required is to periodically inspect the terminals to ensure they
are clean and tight. The alternator cooling fins should also be
cleaned periodically .

When working on or checking the alternator, adhere to
following precautions or alternator damage may occur:

• Do not, under any circumstances, short the field

terminal of the alternator to ground.

109627CE_0512 4-3 REV F

• Do not disconnect the alte rnator output lead or bat-

Alternator

Fuse block

ÀÁÂ

ÃÄÅ

Fusible link

tery cables while the alternator is operating.

• Do not remove the alternator from the power unit

without first disconnecting the negative (-) battery
cable. When removing the battery, disconnect the
negative (-) cable first.

• To install a battery, make sure that the positive (+)

cable is connected first and that the negative terminal
is connected to ground. Reverse polarity will destroy
the rectifier diodes in the alternator.

If the battery charge warning light illuminates, indicating
that the alternator is not charging the battery, check the fan
belt and the wiring connections. If these items are in
satisfactory condition and the warning light continues to
indicate no charge, consult your Hustler Dealer .

Figure 4-3

Fuse block

The fuse block, is located on the left side of the power unit
compartment. Always replace blown fuses with the size
specified for that circuit. Figure 4-4

Figure 4-4

a red wire that goes from the starter terminal to a connector
that links into the main wiring harness.

To replace the fusible link wire (Figure 4-5):

1. Order Hustler part number 385603370.

2. Disconnect the negative battery cable from the battery.

3. Unplug the connector linking the wire to the main

wiring harness.

4. Remove the old fusible link wire from the starter

terminal.

5. Replace the old fusible link wire with a new one-first

attaching to starter terminal, and then connecting into
the main wire harness.

IMPORTANT: Always replace the fusible link wire with

the appropriate fusible link wire for this power unit.

Fuse Size Circuit protected

1 20 amp Spare
2 20 amp Auxiliary P.T.O., Work lamp (opt), back

buzzer (opt)
3 20 amp Auxiliary
4 10 amp Spare
5 10 amp Head lamp, meter back light, stop

6 10 amp Temperature gauge, fuel gauge, fuel

solenoid, safety switch, starter, cruise

control (opt)

pump, monitor lamp,

Alarm buzzer & relay

Fusible link

A fusible link wire is used to protect the mower’s entire
electrical system. If too much amperage passes through this
wire it will melt down so that it will no longer allow current to
pass (similar to the way a fuse works). The fusible link wire is

REV F 4-4 109627CE_0512

Figure 4-5

Head lamp

If a head lamp fails to operate, the bulb must be replaced.

To change the bulb:

1. Pull the lower cover frontward and remove it. Figure 4-

6

2. Turn the socket counterclockwise and remove the

socket from the headlamp housing.

3. Remove the bulb. Figure 4-7

4. Install a new bulb in the socket and install the socket

with bulb in the housing.

5. Install the front cover.

Lower cover

Light bulb

& socket

Screw

Screw

Front

cover

Instrument lights

Figure 4-6

Replacement bulb:

Head Lamp Bulb Type. . . . . JIS S25 BA15 12V 23W

Instrument panel light

To change a burned out instrument bulb:

1. Pull the lower cover frontward and remove it. Figure

4-7

2. Remove the four screws that connect the front cover to

the dashboard. Figure 4-8

3. Remove the front cover of the dashboard. Figure 4-8

4. Turn the burned out bulb together with the socket half

a turn counterclockwise and pull it out. Figure 4-9

5. Replace the bulb with new one and return the bulb and

socket to the original place.

6. Re-attach the front cover and lower cover.

Replacement bulbs:

Indicator Bulb Type. . . . . . . JIS T6.4 14V 3W (Qty 5)

Indicator Bulb Type. . . . . . . JIS T5 13.5V 2W (Qty 1)

Figure 4-7

Figure 4-8

Figure 4-9

Fuel system

DANGER: To avoid personal injury or property

damage, use extreme care in handling diesel fuel.
Diesel fuel is extremely flammable and the vapors
are explosive.

DANGER: Observe usual fuel handling precau­tions:

Do not smoke while refueling or anywhere near
fuel. Extinguish all cigarettes, cigars, pipes and
other sources of ignition.

109627CE_0512 4-5 REV F

Do not remove fuel cap or fill tank with engine run­ning or while engine is hot. Clean up any diesel fuel
spills immediately.
Always tighten the fuel cap securely.
Allow engine to cool before storing machine inside a
building.
Keep fuel away from open flame or spark and store
machine away from open flame or spark or pilot
light such as on a water heater or other appliances.
Use extreme care when handling diesel fuel. It is
extremely flammable and vapors are explosive. A
fire or explosion from diesel fuel can burn you and
others and can damage property.
Never refuel or drain the diesel fuel from the
machine indoors.
Never attempt to start engine when there is a strong
odor of diesel fuel fumes present. Locate and cor­rect cause.
Store diesel fuel in an approved container and keep it
out of the reach of children.
Do not fill diesel fuel containers inside a vehicle or
on a truck or trailer bed with interior carpets or plas­tic truck bed liners. Always place diesel fuel con­tainers on the ground away from your vehicle before
filling.
When practical, remove diesel fuel-powered equip­ment from the truck or trailer and refuel the equip­ment with its wheels on the ground. If this is not
possible, then refuel such equipment on the truck or
trailer using a portable container and not a fuel dis­penser nozzle. If a fuel dispenser nozzle must be
used, keep the nozzle in contact with the rim of the
fuel tank or container opening at all times until fuel­ing is complete. Do not use a nozzle lock-open
device.
Never use diesel fuel or gasoline for cleaning parts.
Read and observe safety precautions elsewhere in
this manual.

WARNING: Diesel fuel is harmful or fatal if swal­lowed.

Long-term exposure to vapors can cause serious
injury and illness.
Avoid prolonged breathing of vapors.
Keep face away from nozzle and fuel tank or diesel
fuel container opening.
Keep diesel fuel away from eyes and skin.
If diesel fuel is spilled on clothing, change clothing
immediately.

WARNING: Under no circumstance s should gas-
oline, alcohol, or gasohol be added to diesel fuel.
These combinations can create an increased fire or
explosive hazard.

WARNING: Fuel System Under Pressu re! Fuel in
the injection system is under high pressure and can
penetrate the skin. Unqualified persons should not
remove or attempt to adjust a pump injector, nozzle
or any part of the fuel injection system.

Do not use your hand to check for leaks. Use a piece
of cardboard or paper to search for leaks.

If any fluid is injected into the skin, obtain medical
attention immediately or gangrene may result.
Failure to follow these instructions can result in seri­ous injury.
Check the fuel line periodically as it is subject to
wear and aging, fuel may leak onto the engine which
could cause a fire.

IMPORT ANT: Do not fill tank to capacity. Allow room

for expansion.

IMPORTANT: If the original fuel tank cap is lost, always

replace it with a Hustler approved cap. A “will fit cap” may
not be safe.

Diesel fuel

• Use clean, quality No. 1-D or No. 2-D fuel

•Use No. 1-D fuel if the ambient temperature is
expected to be lower than 4 degrees C or if the power
unit is to be used at an altitude exceeding 1524 m.

• Use diesel fuel with a pour point of at least 12°C
below the expected ambient temperature to prevent
fuel flow problems in cold weather.

• Keep dirt from entering the fuel tank.

• Sulfur content of the fuel should be no more than

0.05%.

• Sediment and water content should not exceed

0.05%.

• Minimum cetane number is 40. Low temperature or
high altitude operation may require use of fuel with a
higher Cetane number.

• Use properly mixed winter fuel when temperatures
are extremely cold. In most areas, diesel fuel is prop­erly blended for summer and winter grades as ambi­ent temperatures change. In winter, use winter grade
diesel fuel only. Otherwise, the fuel may cloud and
block the fuel system.

Refueling the power unit

The fuel tank filler cap is located at the left side of the
power unit hood. Before removing the cap, wipe all dust and
dirt from around the cap to prevent debris from falling into the
tank while filling. Figure 4-10

Use an approved fuel container and check the inside of the
container periodically for cleanliness. Fuel tank capacity is

50.5L.

NOTE: The fuel cap is a vented-type. Use only an

approved Hustler replacement cap to prevent fuel system­related problems.

If there is no filter on the storage tank or fuel container,
filter the fuel through a 100-mesh or finer screen when filling
the mower fuel tank. Keep the mower tank as full as possible
(without filling to capacity) to minimize condensation.

REV F 4-6 109627CE_0512

NOTE: It is a good practice to fill the fuel tank at the end

Fuel cap

Sediment

bowl

O

C

Shut-off

valve

Open

Closed

Shown in Open position

of each day, as this will reduce overnight condensation.

Figure 4-10

Fuel filter

Figure 4-11

IMPORTANT: A ny maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Draining the fuel filter:

NOTE: The fuel filter should be drained after every 100

hours of operation.

1. Make sure there is adequate fuel in the fuel tank and

close the fuel shutoff valve (the handle should be
pointing to the “C” position.) Remove the fuel
sediment bowl. Figure 4-12

2. Open the fuel shutoff valve until all water has been

removed and only fuel flows from the filter base.

3. Install the fuel sediment bowel. The fuel system is

auto bleeding And does not require any manual
bleeding procedures.

Changing the fuel filter:

NOTE: Change the diesel fuel filter every 200 operating

hour.

1. Close the shutoff valve (the handle should be pointing

to the “C” position). Figure 4-12

2. Remove the sediment bowl by rotating the retaining

nut Ref. No. 1. Figure 4-12

3. Open the fuel shutoff valve Ref. No. 2, to drain any

remaining water from the tank. Figure 4-12

4. Discard the fuel element Ref. No. 3, and install a new

5. Inspect the O rings Ref. No. 4 & 5 and replace if

element. Figure 4-12

necessary. Figure 4-12

6. Install and securely tighten the sediment bowl.

7. Open the fuel shutoff valve (the handle should be

pointing to the “O” position), so fuel will flow to the
filter. Figure 4-12

8. Bleed the fuel filter and injection pump as described

below in Bleeding the Fuel System.

109627CE_0512 4-7 REV F

Figure 4-12

Bleeding the fuel system

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

The 3700 fuel system is designed to bleed automatically.

1. When the fuel tank is empty

Fill until the fuel level of the tank is at l east half full,
then wait about one minute for air to dissipate.

2. When the fuel filter has been replaced:

After replacing the filter, open the fuel shutoff valve.
Air will dissipate for about one minute

NOTE: Fuel tank fuel level must be half full or more for

auto bleed system to function correctly.

NOTE: The 3700 is an auto bleeding system. No manual

bleeding procedures needed.

Engine oil and filter

Engine oil

fill cap

Engine oil filler

Dipstick

Engine oil

drain

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Checking the Engine Oil Level

Check engine oil daily. Power unit must be setting level and

the engine stopped for a period of time when checking oil
level. Refer to engine manual and maintenance schedule
for oil recommendation and capacities.

Change the engine oil and filter every 100 hours or

annually, whichever comes first.

NOTE: If power u nit is being operated in extremely dirty

conditions, then it is recommended oil be changed more fre­quently. If the engine is operated for extended periods of time
at maximum rated power and speed or under other types of
continuous, severe operating conditions the oil and filter
should be changed at 70 hours intervals following th e initial
oil change.

Refer to Figure 4-13 for the engine oil filter and dipstick

location.

Refer to Figure 4-14 for the engine oil fill location.
Refer to Figure 4-15 for the engine oil drain location.

Changing the oil

1. Before adding engine oil, place the unit on a level

surface, then remove the dipstick to provide crankcase
ventilation.

2. Add oil at the oil fill shown. Figure 4-14

NOTE: When changing the engine oil, add the exact
amount specified in the engine owner’s manual.
NOTE: Use CD grade or better by API classification
engine oil.

3. W ait about fifteen minutes until the oil gets down to the

oil pan. Then check the oil level with a dipstick. A
certain period of time is required before the engine oil
completely flows down from the oil filler to the
crankcase.

4. Check the oil level, accounting for the higher oil level

due to the oil filter oil capacity.

Figure 4-13
Figure 4-14

REV F 4-8 109627CE_0512

Figure 4-15

Engine air filter

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

Perform engine air filter maintenance per the Service
Interval chart shown elsewhere in this manual.

A specially designed dry filter is standard equipment on
these power units and supplies clean combustion air to the
engine. Figure 4-16 Change the filter whenever the Air
Cleaner Restriction Warning Light comes on. Figure 3-1

These units are equipped with a safety filter. The filter

Air filter

element slides over the safety filter. NOTE: For maximum
engine protection and air cleaner service life, install a new inner
safety element every third primary element change or after
every 1000 hours of operation, whichever comes first.

NOTE: The safety filter does not require serv icing unless i t

becomes contaminated with dirt or moisture.

Recommended service procedure

1. Release clamps and remove element. Clean the canister

with a damp cloth.

2. Before installing a new element, inspect it by placing

a bright light inside and rotate the element slowly,
looking for any holes or tears in the paper. Also check
gaskets for cuts or tears. Do not attempt to use a
damaged element which will allow abrasive particles to
enter the engine.

3. Install the new element and reinstall the dust cup.

Make sure it seals all the way around the air cleaner body,
then tighten the clamps.

4. Check all fittings and clamps periodically for tightness

and inspect hoses for holes or cracks.

5. Periodically check the intake hose for signs of ingested

dust. Locate and repair the source of ingested dirt.

6. Never operate a machine without an air filter installed.

Overservicing

Overservicing occurs when an air filter element is removed
for cleaning or replacement before it is necessary. Each time the
filter is removed a small amount of dirt and dust could fall in the
intake system. This accumulated dirt can cause a dusted engine.
It only takes a few grams of ingested dirt over the normal
service life of an engine to cause a dusted engine.

Do not clean element, replace with a new element only.

Cleaning used air filter elements, through improper cleaning
procedures, can get dust on the inside of the filter causing dirt
ingestion and engine failure.

It is important to note that whenever an air filter element is
cleaned by any method, the person or company performing the
cleaning assumes responsibility for the integrity of the filter
from then on. The warranty for air filters expires upon

cleaning or servicing in any manner because the condition of
the filter after servicing is completely out of their control.
Therefore, on a dust ingested engine failure, there will be no
warranty consideration if the air filter element has been
cleaned or serviced in any manner.

A partially dirty air filter element works better than a new
element. Therefore, a dirty filter element is not bad for the
engine unless it is excessively restricting the air flow and engine
performance is affected. The reason is simple. The media in the
filter must be porous to allow air to pass through it. W hen dirt y
air passes through the filter, the dirt plugs some of the holes in
the media and actually acts as part of the filter media. When the
next round of dirt enters, the first dirt helps filter out even
smaller particles making the filter more efficient at stopping dirt
from entering the engine. This is referred to as barrier filtration.

Of course, at some point the filter media becomes too clogged
to allow air to pass.

The mowing conditions will determine the frequency of air
filter element changing.

Figure 4-16

Cooling system

IMPORT ANT: Any maintenance operation that requires the

removal of safety covers must be performed by a trained service
technician.

The 3700 engine must operate at the correct temperature to
obtain maximum efficiency and service life. This is dependent
on the cooling system.

Always fill the system with a 50/50 solution of permanent
antifreeze and clear water.

Checking the coolant level

WARNING: Always wear eye protection when ser-

vicing the cooling system.

NOTE: Visually inspect the system daily prior to operating

power unit. Be sure the engine is level. Open the hood, and
check the coolant recovery reservoir located next to the battery.
Check the coolant level only when the system is cold. Check
the coolant level only at the overflow reservoir (Figure 4-16).
The cooling system is a closed type. Never open the radiator
cap. Doing so may induce air into the cooling sy stem and may
cause overheating. The coolant level should be between the low
and full marks on the reservoir.

If the coolant recovery reservoir is low, refill system, with the
proper coolant mixture, through the recovery reservoir. It is not
necessary to remove the radiator cap to replenish the coolant.
Engine cooling is accomplished with a 50/50 mixture of clear
water and Ethylene Glycol (anti-freeze). This mixture will
provide freeze protection to -34° C.

The radiator is equipped with a pressure cap and overflow
reservoir.

109627CE_0512 4-9 REV F

DANGER: Never remove radiator cap or overflow

Radiator

screen

Coolant
recovery
reservoir

Drain valve

Radiator

reservoir cap when engine is hot. Pressurized hot
steam and water may be released, causing serious
burns or possible blindness.

The cooling system operates under pressure con­trolled by the radiator cap. It is dangerous to
remove the cap while the system is hot. Always
cover the cap with a thick cloth and turn it slowly
counter-clockwise to the first stop. Allow all pres­sure to escape before removing the cap completely.

Be sure that the radiator fins are clear of chaff and dirt to

allow free air movement.

engine and remove the hose. Allow all water to drain
from the system through the drain valve.

3. Close the drain valve and slowly refill the system with

a 50/50 solution of permanent antifreeze and clear
water. Fill until the coolant level is approximately

3.8cm-5cm below the bottom of the filler neck. Do not
fill beyond this level.

4. Clean the radiator cap and cap seal and install the cap.

Figure 4-19

5. Fill the coolant recovery reservoir bringing the fluid

level up until it is between the full and low marks on
the reservoir.

6. Open the front screen and remove chaff, dust, or other

foreign substances. The foreign substances can be
dropped onto the ground through the rubber at the
lower part. Figure 4-20

7. Pull out on the radiator screen and clean it. Figure 4-17

8. Run the engine until normal operating temperature is

reached, then stop the engine. Recheck the coolant
level when the engine is cold and add additional
coolant as necessary.

IMPORTANT: Never run the engine when the cooling

system is empty. Do not add cold water or cold antifreeze
solution if the engine is hot.

Figure 4-17

Draining and flushing the cooling system

NOTE: Drain and flush the radiator and engine block

every 12 months. Refill with a 50/50 mixture of permanent
antifreeze and clear water.

WARNING: Allow the engin e and radiator to cool
before draining and flushing the system.

To drain the cooling system:

1. Use a suitable receptacle to catch the used coolant.

Remove the radiator cap and open the drain valve to
drain the radiator and engine block. Figure 4-18

2. After the coolant has drained, place a water hose in the

radiator filler neck and run water through the system.
When water is flowing from the block drain valve, start
the engine. When the water flowing from the drain
valve, is free of discoloration and sediment, stop the

Figure 4-18

REV F 4-10 109627CE_0512

Figure 4-19

Radiator screen

open position

Alternator

adjusting

bolts

Fan belt

Dipstick

Filler hole

Figure 4-20

Fan belt

NOTE: Check the condition of the fan belt after every 50

hours of operation. Check fan belt tension after every 200 hours
of operation. Figure 4-21

A belt-driven fan located at the front of the engine draws air
through the fins of the radiator to lower the temperature of the
radiator coolant.

When 9-11 kg of thumb pressure is applied midway between
the water pump pulley and the alternator pulley, a correctly
tightened belt will deflect 10mm-15mm.

If the fan belt is slipping, fan efficiency is lowered, resulting
in the engine running too hot. If the belt is too tight, the life of
the alternator bearing will be shortened. If the fan belt shows
signs of cracking or fraying, install a new one.

To adjust fan belt tension:

1. Loosen the alternator mounting bolts. Figure 4-21

system

IMPORT ANT: Any maintenance operation that requires the

removal of safety covers must be performed by a trained service
technician.

WARNING: Hydraulic fluid escaping under pressure
may have sufficient force to penetrate skin and cause
serious injury. Foreign fluid injected into the skin must
be surgically removed within a few hours by a doctor,
familiar with this form of injury, or gangrene may
result.

Before applying pressure to hydraulic system, make
sure all connections are tight and all hoses and lines
are in good condition. To find a leak under pressure,
use a piece of cardboard or wood — never use your
hands. Relieve all pressure in the system before dis­connecting or working on hydraulic lines. To relieve
pressure, lower all attachments and shut off engine.

Checking Oil Level:

Check the oil level every 50 hours.

1. With the power unit standing level and the engine off,

check the oil level with the dipstick. Figure 4-22

2. The oil is at the correct level when the oil level is within

the mark at the lower end of the dipstick. If low, add ISO
VG46 hydraulic oil, through the filler hole. Do not fill
beyond the mark on the stick, as the transmission will be
overfilled.

3. Install the dipstick.

2. Pry the alternator away from the engine and tighten the

3. Recheck belt deflection.

Transmission, front axle and hydraulic

WARNING: Never attempt to loosen or tighten alter-

nator mounting bolts with the engine running.

mounting bolts.

Figure 4-21

Figure 4-22

Changing Oil & Filters:

NOTE: Replace the filters after the first 50 hours of opera-

tion and every 500 hours or annually thereafter following the
procedure below:

Change the oil every 500 hours or annually.

1. With the oil at normal operating temperature, drain and

discard the oil by removing the transmission drain plug.
Reinstall the plug after the oil has drained. Figure 4-23

109627CE_0512 4-11 REV F

WARNING: The oil will be hot. Use caution to pre-

Drain plug

HST oil filter

Hydraulic oil filter

Rear axle oil fill

& dipstick

vent skin coming in contact with hot oil.

2. Unscrew the oil filters and discard. Figure 4-24 & Figure

4-25

3. Coat the gasket on the new filters with a film of oil.

Screw the filters into place until the gasket contacts the
sealing surface, then tighten the filters approximately 3/4
of a turn by hand. Do not over tighten. Figure 4-24 &
Figure 4-25

4. Remove the filler plug and dipstick and fill with ISO

VG46 hydraulic oil.

5. The transmission is filled to the correct level when the oil

level is within the mark at the lower end of the dipstick.
Do not fill beyond the mark on the stick, as the
transmission will be overfilled.

6. Install the dipstick and filler plug.

7. Start the engine and check the hydraulic oil filter for

leaks.

8. Stop the engine and check the hydraulic oil level.

Replenish if necessary.

IMPORTANT: The tran smission, front axle and hydraulic

system operate from a common oil sump. Special attention must
be given to keeping oil clean.

Figure 4-23

Figure 4-25

using the combined dipstick/filler plug. The oil is at the
correct level when it reads between the two marks on the
dipstick.
NOTE: Place the dipstick/filler plug into the oil inlet to
measure the oil level. Do not screw dipstick into housing
when checking oil level. Figure 4-26

2. If the level is low, add ISO VG46 hydraulic oil through

the filler hole. Do not fill above the dipstick full mark.

3. Reinstall the dipstick/filler plug.

Change the oil every 500 hours or annually.

1. With the oil at normal operating temperature, drain the oil

by removing the rear axle and final reduction gear case
drain plugs. Reinstall the plugs after the oil has drained.
Discard the oil. Figure 4-27 & Figure 4-28

2. Supply new ISO VG46 hydraulic oil into the fill hole

until oil level is between the two marks on the di pstick.
Figure 4-26

3. To fill the final reduction gear cases with new ISO VG46

hydraulic oil:

a. Remove the right and left rear wheels.
b. Oil supply plugs are located on the front side of the

right and left final reduction gear case. Remove the
plugs. Figure 4-29

c. Pour the hydraulic oil in the plug holes until the final

reduction gear cases are full

d. Re-install plugs.

Rear axle case and final reduction gear cases

Figure 4-24

Check the oil level every 100 hours.

1. Clean the area around the dipstick/filler plug to prevent

dirt from entering the rear axle housing. With the engine
off and the power unit standing level, check the oil level

REV F 4-12 109627CE_0512

Figure 4-26

PTO control lever adjustment

IMPORT ANT: Any maintenance operation that requires the

removal of safety covers must be performed by a trained service
technician.

Figure 4-27

Rear axle oil drain

Final reduction

gear case drain plug

Final reduction gear

case fill plug

Linkage

Locknuts

NOTE: Adjust the PTO control lever linkage every 100 hours.

1. The PTO control lever must move easily (soft), through

the first 50% of travel. The remaining 50% of control
lever travel must have a resistance (hard).

2. At the point of resistance (50% into the control lever

stroke), attach a pull scale to the PTO control lever. A
reading of 5 kg is correct at the point of resistance (50%
into the control lever stroke). A reading of 12-13 kg is
correct at the full engagement point (the final 50% of
control lever travel). If the control lever stroke is not
correct, or the amount of resistance on the pull scale at
the point of resistance is incorrect, proceed to step 3.
NOTE: The adjustment bolt on the PTO adjustment
linkage uses left-hand threads.

3. Loosen the locknuts on the PTO adjustment linkage.

Figure 4-30

4. Turn the adjustment rod and recheck the resistance on the

pull scale and the control lever stroke. Repeat this step
until the control lever stroke and the pull resistance are
correct.

5. Tighten the locknuts.

Figure 4-28

109627CE_0512 4-13 REV F

Figure 4-29

Figure 4-30

General engine maintenance

IMPORT ANT: Any maintenance operation that requires the

removal of safety covers must be performed by a trained service
technician.

Detailed instructions and recommendations for break-in and
regular maintenance are specified in the Engine Owner’s
manual. Please refer to this manual for engine servicing,
lubricating oil levels with the proper SAE rating and viscosity
recommendations, bolt torques, etc. The engine warranty is
backed by the manufacturer. Special attention should be paid to
applicable data which will not be duplicated here.

Park brake adjustment

IMPORT ANT: Any maintenance operation that requires the

removal of safety covers must be performed by a trained service
technician.

The park brake must be adjusted when there is less than
10mm or more than 19mm of free play in the park brake lever
(Figure 4-31), the park brake is dragging, or the park brake is
not working effectively.

1. Park power unit on level ground, lower the mower deck

or front mount attachment to the ground, turn off power
unit, and remove key. Chock the front drive tires to keep

machine from rolling.

(10 mm - 19 mm

Park brake

linkage

Cable adjuster

barrels

Jam nut

Jam nut

Bottom edge of

brake pedal

2. Check the park brake lever free travel distance: With the

park brake lever all the way down (Off), pull the lever up
until you notice resistance from brake engagement ­measure this distance as shown in Figure 4-31. This free
play distance should be 10mm to 19mm.

3. To adjust the park brake free play, raise the seat platform

and secure it in the up position.
IMPORTANT: Make sure the seat platform is secured
properly in the up position to prevent it from falling back
down on you as you are working.

4. Loosen the jam nuts on each of the park brake cable in-

line cable adjuster barrels as shown in Figure 4-32.
Back the jam nuts off several turns.

5. Turn the in-line cable adjuster barrel (Figure 4-32) on

each cable accordingly to properly adjust the cable.
Lengthening the in-line cable adjuster assembly
(exposing more threads) will tighten the cable and reduce
the free play. Shortening the in-line cable adjuster
assembly length (less exposed threads) will loosen the
cable and create more free play. Both cables should be
adjusted so they are providing equal free play when the
brake is off, and equal brake force on each brake when
the park brake is applied.

6. Re-check the free play (step 2). Re-adjust as necessary.

7. Tighten the jam nuts.

Once the park brake is adjusted properly, check to make sure
it is working effectively and does not drag. If any problems
persist, do NOT operate the power unit, and contact your dealer.

Figure 4-32

Figure 4-34). This is determined by the distance the
brake pedal travels from its rear most position pushing
forward on the pedal until you feel the brakes beginning
to engage. Measure this distance - if it is more than
19mm or less than 10mm, the brakes must be adjusted.

3. The brake linkage rods are located underneath the floor

pan. (Figure 4-35) Loosen the jam nuts located behind
the front clevis on each of the brake linkage rod
assemblies. Back the jam nuts off. Figure 4-36

4. Adjust the brake linkage rods accordingly until the

proper brake pedal free play is achieved. Make sure the
right and left brake linkage rod lengths are adjusted
equally.

5. Re-check the pedal free play (step 2). Re-adjust as

necessary.

6. Tighten the jam nuts against the clevis base.

Figure 4-31

Inspecting and adjusting the service brake

The service brake must be adjusted when:

a. There is less th an 10mm or more than 19mm of free

travel in the brake pedal (Figure 4-33 & Figure 4-34),
or,

b. When the brakes do not work effectively, or,
c. When the brakes are dragging.

1. Park power unit on level ground, lower the mower deck

or attachment to the ground, turn off power unit and
remove key. Chock the front drive tires to keep machine
from rolling. Make sure the park brake is in the OFF

2. Check the free travel of the brake pedal (Figure 4-33 &

position.

Once the brakes have been properly adjusted, check to make
sure they are working correctly on the power unit in a safe area
away from any obstructions or bystanders. Make sure the
braking force on both front drive wheels is equal. Re-adjust if
necessary.

If you find that the brakes are dragging, check the park brake
adjustment. If this does not fix the problem and your brakes
continue to work incorrectly, do not operate the power unit
and contact your Hustler Dealer.

REV F 4-14 109627CE_0512

Figure 4-33

(10 mm - 19 mm)

Bottom edge of

brake pedal

Bottom edge of

brake pedal

Brake adjusting

rod - left side

Front clevis

Jam nut

Brake linkage

‘F’ Dimension

‘R’ Dimension

F = R mm - 3.175 mm

Adjustable tie-rod

Front of

power

unit

Jam nut

Tie rod

Figure 4-34

accordingly to meet the dimensional requirements of step
#4.

7. Tighten the jam nuts on either end of the tie rod. Make

sure the ball joints on each end move freely once jam
nuts are tightened.

Figure 4-36

Figure 4-35

Rear wheel toe adjustment

1. Park the power unit on a flat, level surface with the rear

wheels oriented so the power unit will drive a straight

line forward.

2. Fully engage the park brake, lower the front end

attachment, and turn off the power unit. Remove the
keys. Chock the front drive tires of the power unit.

3. Measure 'F' and 'R' dimensions: The distance between

the inside of the rim edge of the RH wheel to the LH
wheel. This measurement needs to be taken at the points
on the wheel rims horizontal with the axle center. Figure
4-37

4. The 'F' dimension should be between 1.9 mm - 4.4 mm

less than 'R' dimension.

5. If the toe-in must be re-adjusted to meet the dimensional

requirements, loosen the jam nuts on either end of the tie
rod. Figure 4-38

6. Once the jam nuts are both loose and backed off, rotate

the tie rod in the appropriate direction and adjust

109627CE_0512 4-15 REV F

Figure 4-37

Figure 4-38

REV F 4-16 109627CE_0512

109627CE_0512 4-17 REV F

REV F 4-18 109627CE_0512

109627CE_0512 4-19 REV F

3700 Maintenance Schedule
Refer to Figures 4-39 & 4-40

SERVICE AT

INTERVALS INDICATED

Engine oil level (C) X
Radiator coolant level (C) X
Radiator screen (C) X
Visually inspect unit for lo ose hardware

and/or damaged parts (A) (C) X
Hydraulic filter - replace X X
HST filter - replace X X
Engine oil - replace (C) X X
Engine oil filter - replace (C) X
Tire pressure X
Wheel bolt torque (B) X
All fluid levels (C) X
Tire pressure X
Battery (C) X
Fan Belt inspection (C) X
Transmission oil - check level X
Lift arm grease fittings - lubricate X
Lift cylinder grease fittings -

lubricate X
Brake pedal shaft grease fitting - lubri-

cate X
Power steering cylinder grease

fitting - lubricate X
Differential lock pedal shaft grease fit-

ting - lubricate X
Fuel filter - drain (C) X
Rear axle 4WD oil - check level X
PTO control lever adjustment

(Refer to PTO Control Lever Adjust-
ment section) X

Check hydraulic hoses & fuel lines
for cracks and leaks (C) X

Check PTO Safety Shut-off System &
adjust (C)

Fuel filter element - replace (C) X
Fan belt tension (C) X
Wheel lug bolt torque X
Transmission oil & filters - replace X
Rear axle 4WD oil - replace X
Air cleaner element - replace

(Refer to Engine Air Filter section) (C) X
Radiator coolant - replace (C) X

Daily

First

50

hours

Every

50

hours

Every

100

Hours

Every

200

hours

Every

500

hours

Seasonal

NOTE:

A. Trash and clipping buildup around engine could cause a fire. Keep engine compartment and muffler area clean.
B. Torque wheel lug bolts to the following torques after the first 2 hours of operation.

Front wheel lug bolts 115-129 Nm
Rear wheel lug bolts 88.1-101.7 NmAny maintenance operation that requires the removal of

safety covers must be performed by a trained service technician.

REV F 4-20 109627CE_0512

MAINTENANCE LOCATOR CHART

10

8

1. Engine Oil Fill

2. Engine Air Cleaner

3. Radiator Cap

4. HST Filter

5. Hydraulic Oil Filter

6. Engine Oil Filter & Dipstick

7. Wheels & Tires

8. Fuel Filter

9. Battery

10. Fan Belt

11. Transmission Oil Fill

12. Lift Arm

13. Lift Cylinder

1

3

2

18

14. Brake Pedal Shaft

15. Power Steering Cylinder

16. Differential Lock Pedal Shaft

17. Rear Axle 4WD Oil Fill/Dipstick

18. Radiator Screen

6

7

109627CE_0512 4-21 REV F

6

5

9

4

7

Figure 4-39

MAINTENANCE LOCATOR CHART

12

14

16

15

13

13

11

17

1. Engine Oil Fill

2. Engine Air Cleaner

3. Radiator Cap

4. HST Filter

5. Hydraulic Oil Filter

6. Engine Oil Filter & Dipstick

7. Wheels & Tires

8. Fuel Filter

9. Battery

10. Fan Belt

11. Transmission Oil Fill

12. Lift Arm

13. Lift Cylinder

14. Brake Pedal Shaft

15. Power Steering Cylinder

16. Differential Lock Pedal Shaft

17. Rear Axle 4WD Oil Fill/Dipstick

18. Radiator Screen

Figure 4-40

REV F 4-22 109627CE_0512

109627CE_0512 4-23 REV F

REV F 4-24 109627CE_0512

STORAGE

When storing the unit at the end of the operating season, the
following steps should be taken to ensure readiness for the
next season.

IMPORTANT: Any maintenance operation that requires

the removal of safety covers must be performed by a trained
service technician.

1. Remove all grass, dirt, and trash from power unit and

mower. Clean power unit and mower and touch up all
scrapes with Hustler spray paint.
IMPORTANT: Wash the machine wit h a mild deter­gent and water. Do not pressure wash the machine.
Avoid excessive use of water

2. Install new air filter per Engine Owner’s Manual.

3. Check thoroughly for any worn or damaged parts that

need replacing and order them from your dealer.

4. If the power unit does not have a deck mounted, raise

the lift arms hydraulically to their fully raised position
so that the lift cylinder is fully retracted. This will
protect the cylinder rod surfaces from corrosion.

5. Lubricate the unit. Drain and refill the transmission,

hydraulic system and front axle with new oil.

6. Block power unit up so weight is off tires.

7. Do not deflate tires.

8. Perform separate engine preparation as listed below.

9. Store power unit in a clean, dry place.

10. Remove the battery from machine
a. Clean battery
b. Check the electrolyte level
c. Charge the battery, if necessary
d. Store battery in a cool, dry place (do not expose to

freezing temperatures)

e. Always keep the battery fully charged. (Especially

important to prevent battery damage when the
temperature is below 0

o

C.

Preparation of engine for storage

When engine is to be unused for long periods, proceed as

follows:

1. Run engine for a minimum of 15 minutes.

2. Drain oil from crankcase while engine is still warm.

3. Refill with fresh oil of proper viscosity.

4. Special precautions should be taken to protect the fuel

injection pump and injector nozzle against corrosion
and gumming.

5. Flush the fuel system with a special oil, a quantity of

which will remain in the system when the engine is

shutdown. Special diesel fuel system flushing oils are
available from most oil companies. If this oil is not
available, mix 0.5 liters of SAE 10 non-detergent
engine oil with 10 liters of No. 2 diesel fuel. Drain the
fuel tank and pour 7 liters of the special flushing oil (or
lubricating mixture) into the fuel tank. Run the engine
for 10 minutes to ensure complete distribution of the
special oil through the injection pump and fuel
injectors. There is no need to remove the injector
nozzles.

6. Fill the fuel tank with No. 1 diesel fuel. IMPORTANT:

Do not use No. 2 diesel fuel, for winter storage,
because of wax separation and setting at low
temperature.

7. Open the drain valve on the radiator. Flush the system,

close the drain valve and fill with a 50/50 solution of
permanent antifreeze and clear water..

8. Clean exterior surface of engine. Spread a light film of

oil over any exposed metal surfaces of engine that are
subject to corrosion.

9. Clean dirt and chaff from radiator fins and muffler.

10. Check oil filler cap and fuel tank cap to make certain

they are securely in place.

11. Refer to engine manual for more information .

New season preparation

Before starting the power unit following post season

storage, the following servicing is required:

1. Clean power unit, removing trash and dirt

accumulation.

2. Check engine oil level and common sump (for the

hydraulic lift, transmission, front axle and power
steering) and the rear axle.

3. Install a fully charged battery.

4. Check the cooling system for proper level of 50/50

solution of anti-freeze and clear water.

5. Tighten any bolts that have loosened and make sure all

hair pins, cotter pins and clevis pins are in place.

6. Install all safety shields and review safety precautions

listed in this manual.

7. Check and inflate tires to 96-124 KPA.

8. Refer to engine manual for more information.

9. Start the engine and allow it to idle a few minutes. Be

sure the engine has proper oil pressure and that each
control is functioning properly.

10. Drive the unit without load and check to be sure it is

operating satisfactorily.

If you would like to have a copy of the Hustler product manuals, contact your Hustler dealer.

109627CE_0512 5-1 REV F

PRODUCT LITERATURE

Hustler 3700 Technical Specifications

Sound Measurements (dBA):
Sound Power per

Hemisphere method
(ISO 3744 - 1994 & 11094 - 1991)

Guaranteed Sound Power Level

928713CE / 928721CE – 105 dBA
928713CE / 928754CE – 105 dBA
928713CE / 928739CE – 105 dBA

Operator Ear

928713CE / 928721CE – 86.5 dBA
928713CE / 928754CE – 86.3 dBA
928713CE / 928739CE – 88.3 dBA

Engine RPM

928713CE / 928721CE – 2700 (± 50) RPM's
928713CE / 928754CE – 2700 (± 50) RPM's
928713CE / 928739CE – 2700 (± 50) RPM's

Vibration:
(Maximum weighted acceleration m/s2 - whole body)

928713CE / 928721CE – <0.5 m/s

2

928713CE / 928754CE – 0.6 m/s²
928713CE / 928739CE – 0.5 m/s²

Whole body - The RMS acceleration in m/s² measured on 3 minutes on a representative machine. The acceleration value depends
upon the roughness of the ground, the speed at which the tractor is operating and the operator driving habits. Measurements were
obtained thru actual field data according to STD Procedure in ISO 2631-1-1997.

Hand/Arm -

928713CE / 928721CE – The RMS acceleration in m/s² measured in 24 seconds is less than 2.5 m/s². These values were
obtained through hand/arm measure per ISO 5349-1-2001.
928713CE / 928754CE – The RMS acceleration in m/s² measured in 24 seconds is less than 2.5 m/s². These values were
obtained through hand/arm measure per ISO 5349-1-2001.
928713CE / 928739CE – The RMS acceleration in m/s² measured in 24 seconds is less than 2.5 m/s². These values were
obtained through hand/arm measure per ISO 5349-1-2001.

Test was performed on a static (stationery) machine.

REV F 5-2 109627CE_0512

INDEX PAGE PAGE

Auxiliary valve kit (optional) . . . . . . . . . . . . . . . . . . 3-11

Children
Controls
Cooling system
Driving the tractor
Electrical system
Engine air filter
Engine oil and filter
Engine starting
Fuel system
General engine maintenance
Hustler 3700 Technical Specifications
Hustler Turf Equipment Authorized Representative
Inspecting and adjusting the service brake
Instrument Panel

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

. . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

. . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

. . . . . . . . . . . . . . . . . . . 4-13

. . . . . . . . . . . . . 5-2

. . . 1-2

. . . . . . . . . 4-14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Operation
Park brake adjustment
Preparation of engine for storage
PTO control lever adjustment
Rear counter-balance weights
Rear wheel toe adjustment

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

. . . . . . . . . . . . . . . . . . . . . . .4-13

. . . . . . . . . . . . . . . . .5-1

. . . . . . . . . . . . . . . . . .4-12

. . . . . . . . . . . . . . . . . .3-12

. . . . . . . . . . . . . . . . . . . .4-15

ROPS (Roll Over Protective Structure)
Safe Servicing Practices
Safety and instruction decals
Safety start interlock system
Seat adjustment
Service access
Slope Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Steering wheel adjustment
Stopping the engine

. . . . . . . . . . . . . . . . . . . . . . .4-1

. . . . . . . . . . . . . . . . . . . .2-1

. . . . . . . . . . . . . . . . . . . .3-6

. . . . . . . . . . . . . . . . . . . . .3-6

. . . . . . . . . . . . . . . . . . . . . . . . .3-10

. . . . . . . . . . .3-12

International Symbols
Lubrication

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Maintenance & Adjustments Introduction
Maintenance Schedule
Manual version
Model and serial number
New season preparation
Operating suggestions

. . . . . . . . . . . . . . . . . . . . . . . . 2-5

. . . . . . . . . . 4-1

. . . . . . . . . . . . . . . . . . . . . . . 4-20

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

. . . . . . . . . . . . . . . . . . . . . . 1-1

. . . . . . . . . . . . . . . . . . . . . . . 5-1

. . . . . . . . . . . . . . . . . . . . . . . 3-13

Operating the hydrostatic transmission and PTO

. . . . . 3-10

Switches
Tires
To the new owner
Torque values
Transmission, front axle and hydraulic system
Using a ramp
Using this manual
Warranty

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

. . . . . .4-11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

. . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

109627CE_0512 i-1 REV F

REV F i-2 109627CE_0512