Pro-Turn™

400
Operator’s Manual
Manuel de I’utilisateur

Models
992273 – Pro-Turn 452
(SN 092000 +)

992275 – Pro-Turn 460

(SN 092000 +)

992276 – Pro-Turn 472

(SN 092000 +)

992278 – Pro-Turn 460 EFI

(SN 092000 +)

992279 – Pro-Turn 472 EFI

(SN 092000 +)

992282 – Pro-Turn 452 EFI

(SN 092000 +)

992283 – Pro-Turn 460 EFI

(SN 092000 +)

992284 – Pro-Turn 472 EFI

(SN 092000 +)

992284 – Pro-Turn 472 EFI

(SN 092000 +)

E10

ENGLISH
05297900A • 3/20
FRANÇAIS
Printed in USA
TABLE OF CONTENTS
WELCOME . . . . . . . . . . . . . . . . . . . . . . 1 MAINTENANCE . . . . . . . . . . . . . . . . . . 23
SAFETY. . . . . . . . . . . . . . . . . . . . . . . . . 2 Service Position . . . . . . . . . . . . . . . . . . . 23
Practices & Laws . . . . . . . . . . . . . . . . . . 2 Hour Meter. . . . . . . . . . . . . . . . . . . . . . . 23
Emission Control System. . . . . . . . . . . . 2 Maintenance Schedule . . . . . . . . . . . . . 23
Required Operator Training . . . . . . . . . . 2 Service Parts . . . . . . . . . . . . . . . . . . . . . 24
Safety Alert Symbol . . . . . . . . . . . . . . . . 2 Check Safety Interlock System . . . . . . . 25
Signal Words . . . . . . . . . . . . . . . . . . . . . 2 Check Hydraulic System . . . . . . . . . . . . 25
Safety Decals. . . . . . . . . . . . . . . . . . . . . 3 Check Tire Pressure . . . . . . . . . . . . . . . 26
Safety Rules. . . . . . . . . . . . . . . . . . . . . . 6 Check Mower Blades. . . . . . . . . . . . . . . 26
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . 12 Check Parking Brake . . . . . . . . . . . . . . . 27
Clean Battery . . . . . . . . . . . . . . . . . . . . . 28
CONTROLS & FEATURES. . . . . . . . . . 14 Charge Battery. . . . . . . . . . . . . . . . . . . . 28
Ignition Key . . . . . . . . . . . . . . . . . . . . . . 16 Check Fasteners . . . . . . . . . . . . . . . . . . 28
Choke Control Lever . . . . . . . . . . . . . . . 16 Lubricate Unit. . . . . . . . . . . . . . . . . . . . . 28
Throttle Control Lever . . . . . . . . . . . . . . 16 SERVICE & ADJUSTMENTS . . . . . . . . 29
Power Take-off (PTO) Switch . . . . . . . . 16
Electrical Service . . . . . . . . . . . . . . . . . . 29
Fuel Valve . . . . . . . . . . . . . . . . . . . . . . . 16
Adjust Transaxles . . . . . . . . . . . . . . . . . 30
Oil Pressure Warning Light . . . . . . . . . . 17
Adjust Parking Brake Interlock. . . . . . . . 31
Malfunction Indicator Light . . . . . . . . . . . 17
Adjust Steering Levers. . . . . . . . . . . . . . 31
Deck Lift Pedal. . . . . . . . . . . . . . . . . . . . 17
Adjust Unit to Drive Straight. . . . . . . . . . 33
Height-of-Cut Adjustment Dial . . . . . . . . 17
Adjust Parking Brake . . . . . . . . . . . . . . . 33
Transport Lock . . . . . . . . . . . . . . . . . . . . 17
Replace Mower Belts. . . . . . . . . . . . . . . 34
Transport Lock Release Lever. . . . . . . . 17
Replace Transaxle Drive Belt . . . . . . . . 36
Seat Adjustment Lever. . . . . . . . . . . . . . 17
Adjust Anti-Scalp Wheels . . . . . . . . . . . 37
Seat Height Adjustment Switch . . . . . . . 17
Adjust Deck Lift Pedal . . . . . . . . . . . . . . 38
Lumbar Support Adjustment Lever . . . . 17
Adjust Deck Lift Assist . . . . . . . . . . . . . . 38
Backrest Adjustment Dial. . . . . . . . . . . . 17
Remove / Install Mower Deck . . . . . . . . 39
Armrest Angle Adjustment Knobs . . . . . 17
Level and Pitch Mower Deck . . . . . . . . . 40
Hour / Maintenance Meter . . . . . . . . . . . 17
Adjust Clutch . . . . . . . . . . . . . . . . . . . . . 41
Parking Brake Lever . . . . . . . . . . . . . . . 18
TROUBLESHOOTING . . . . . . . . . . . . . 42
Steering Levers . . . . . . . . . . . . . . . . . . . 18
Rollover Protection Structure (ROPS) . . 18 STORAGE . . . . . . . . . . . . . . . . . . . . . . . 44
Transaxle Bypass Valves. . . . . . . . . . . . 18 Short-Term Storage . . . . . . . . . . . . . . . . 44
Anti-scalp Wheels . . . . . . . . . . . . . . . . . 18 Long-Term Storage . . . . . . . . . . . . . . . . 44
Safety Interlock System . . . . . . . . . . . . . 18 Start-of-Season Preparation . . . . . . . . . 44
BEFORE OPERATION . . . . . . . . . . . . . 18 ACCESSORIES. . . . . . . . . . . . . . . . . . . 44
Position ROPS . . . . . . . . . . . . . . . . . . . . 19 SPECIFICATIONS. . . . . . . . . . . . . . . . . 45
Adjust Seat. . . . . . . . . . . . . . . . . . . . . . . 20
WARRANTY . . . . . . . . . . . . . . . . . . . . . 48
Set Cutting Height . . . . . . . . . . . . . . . . . 20
Open Fuel Valve . . . . . . . . . . . . . . . . . . 21
OPERATION . . . . . . . . . . . . . . . . . . . . . 21
Emergency Stopping . . . . . . . . . . . . . . . 21
Start The Engine . . . . . . . . . . . . . . . . . . 21
Operate Unit. . . . . . . . . . . . . . . . . . . . . . 21
Stop the Engine . . . . . . . . . . . . . . . . . . . 22
Move Unit Manually . . . . . . . . . . . . . . . . 22
Transport Unit . . . . . . . . . . . . . . . . . . . . 23
Release Transport Lock. . . . . . . . . . . . . 23
 WELCOME
Congratulations on your purchase and welcome to the Gravely family! Every machine in the
Gravely lineup is designed for long-lasting and unsurpassed performance. We are confident
your machine will be part of your family for many years to come.

Have Questions or Need Assistance?

www.gravely.com
A parts manual for your unit is available for free download
or purchase at www.gravely.com.
Manual del operador español está disponible para su descarga gratuita o
compra en www.gravely.com.

REGISTER YOUR PRODUCT! MANUALS

It is extremely important to register your Before operating or servicing the unit, carefully
product at time of purchase. Product and completely read the manuals provided with
registration activates the warranty and the unit. They contain safety instructions and
establishes a communication link from important information about unit controls.
AriensCo. The engine on this unit is covered by a
Locate the model and serial number decal on separate manual. Refer to the engine manual
your unit and register those numbers online at for engine service recommendations. Contact
www.gravely.com. See Figure 1 for decal the engine manufacturer for a replacement
location. Be aware that the original selling manual if necessary.
dealer may have already completed product Your dealer must review important information
registration on behalf of the original in this manual with you before or upon delivery
purchaser. of the unit. It is your responsibility to read and
understand all safety precautions and
Model & Serial Number Label instructions in the manuals. If you do not
understand or have difficulty following the
instructions, contact your Gravely dealer for
assistance. To locate your nearest Gravely
dealer, go to www.gravely.com.

DISCLAIMER
Gravely reserves the right to discontinue, make
changes to, and add improvements upon its
products at any time without public notice or
obligation. The descriptions and specifications
contained in this manual were in effect at
printing. Equipment described in this manual
may be optional. Some illustrations may not be
applicable to your unit.
Figure 1

Record model number here.

Record serial number here.

© 2020 • AriensCo • Brillion, WI 54110 EN - 1

 SAFETY WARNING: AVOID INJURY.
This cutting machine is capable
Read these safety rules and follow them of amputating body parts and
closely. Failure to follow these rules could throwing objects. Failure to
lead to loss of control of unit, severe personal observe the safety instructions in
injury or death to you or bystanders, or result the manuals and on decals
in damage to property or the unit. could result in serious injury or
death.
PRACTICES & LAWS ALWAYS disengage blades,
Practice usual and customary safe working stop unit and engine, remove
precautions. Learn applicable rules and laws key, set parking brake and allow
in your area. ALWAYS follow the practices set moving parts to stop before
forth in this manual. leaving operator’s position.

EMISSION CONTROL SYSTEM SAFETY ALERT SYMBOL

This equipment and/or its engine may include
exhaust and evaporative emissions control This is the safety alert symbol. It
system components required to meet U.S. means:
Environmental Protection Agency (EPA) • ATTENTION!
and/or California Air Resources Board
• YOUR SAFETY IS
(CARB) regulations. Tampering with emission
INVOLVED!
controls and components by unauthorized
personnel may result in severe fines or When you see this symbol:
penalties. Emission controls and components • BECOME ALERT!
can only be adjusted by a Gravely dealer or • OBEY THE MESSAGE!
an authorized engine manufacturer's service
center. Contact your Gravely Equipment
Retailer concerning emission controls and SIGNAL WORDS
component questions. The safety alert symbol above and signal
words below are used on decals and in this
REQUIRED OPERATOR manual. Read and understand all safety
TRAINING messages.
Read and understand the 1. Danger
Operator's Manual and decals
on the unit. This information is DANGER: Indicates an
for your safety and the proper IMMINENTLY HAZARDOUS
use of your equipment. SITUATION! If not avoided,
Failure to follow these WILL RESULT in death or
instructions and warnings may cause death serious injury.
or serious injury. If you have purchased this
product from a Gravely dealer, the dealer can 2. Warning
provide you with training.
Familiarize yourself and any other operators WARNING: Indicates a
with all controls and the safe use of the POTENTIALLY HAZARDOUS
features of this unit. If you loan, rent or sell SITUATION! If not avoided,
this product to others, provide them with all COULD RESULT in death or
manuals. serious injury.
If you have any questions, please call our
customer support line at 920-756-4688 or 3. Caution
contact us at www.gravely.com. Do not use
this equipment if, after reading the Operator's
CAUTION: Indicates a
Manual and the on-board decals, you have
POTENTIALLY HAZARDOUS
any questions about the safe use of this
SITUATION! If not avoided, MAY
product.
RESULT in minor or moderate
injury. It may also be used to
alert against unsafe practices.

EN - 2
4. Notice SAFETY DECALS
NOTICE: Indicates information or procedures The safety decals on your unit are visual
that are considered important but not hazard reminders of the important safety information
related. If not followed, property damage in this manual. All messages on your unit
could result. must be fully understood and carefully
followed. Safety decals on the unit are
5. Important explained below.
IMPORTANT: Indicates general reference ALWAYS replace missing or damaged safety
information worthy of special attention. decals. Replacement decal information is in
the parts manual for your unit. Decals can be
ordered from your dealer.
See Figure 2 for safety decal locations.
Safety Decal Locations

9
2

07800401

07800410

1
8
KEEP HANDS and FEET AWAY

00
81
98
02

3 07800410

07800654

Figure 2

EN - 3
Safety Decal Descriptions 1. Tipping Hazard
1. DANGER!
Avoid tipping hazard.

DANGER!

DO NOT operate on slopes

over 15°.
Read Operator’s Manual.

1. Amputation Hazard DO NOT operate on slopes

over 15°.
To avoid amputation hazard,
DO NOT put hands near
rotating blades.
1. Service Hazard

Before servicing unit, do the

To avoid amputation hazard, following:
DO NOT put hands near
moving belts.

Read Operator’s Manual

before servicing or making
Keep hands away from all adjustments to unit.
rotating or moving parts.

Set parking brake.

Keep all guards and shields
in place.

Remove key and disconnect

1. Discharge Hazard spark plug before servicing
or making adjustments to
unit.
NEVER direct discharge
toward people, pets or
property. Thrown objects 1. Bystander Hazard
can cause injury or damage.

DO NOT operate the unit in

Keep children and others the presence of bystanders.
away from unit while unit is
in operation.

DO NOT carry passengers.

DO NOT operate mower
unless all guards are in
operating position or bagger
is attached.

EN - 4
 Amputation Hazard –
Look behind when operating NEVER stick hands or feet
the unit in reverse. under deck or shielded
areas.

1. Loss of Traction Hazard

Stop engine, remove key,
and read manual before
If loss of traction is servicing or making
experienced do the adjustments to unit.
following:

Keep children and others

away from unit while unit is
in operation.
Disengage PTO.

Keep hands and away from

all rotating or moving parts.
Look before backing.
Proceed off slope slowly.

DO NOT step or stand in

this area.
DO NOT try to turn or speed
up.

4. DANGER!
2. DANGER! Discharge Hazard – NEVER
Discharge Hazard – NEVER operate unit without
operate unit without discharge chute in operating
discharge chute in operating position. Thrown objects can
position. Thrown objects can cause injury or damage.
cause injury or damage.
DO NOT operate mower
unless all guards are in
DO NOT operate mower operating position or bagger
unless all guards are in is attached.
operating position or bagger
is attached.

5. HOT SURFACES!
3. DANGER!
DO NOT touch parts which
Discharge Hazard – NEVER are hot from operation.
direct discharge toward
people, pets or property. ALWAYS allow parts to cool.
Thrown objects can cause
injury or damage.

EN - 5
6. ROTATING PARTS! 9. WARNING!
Overfilling may cause
AVOID INJURY. Stay clear severe damage to
of rotating parts. evaporative system.
NEVER fill fuel tank when
engine is running, hot, or
unit is indoors.
Replace fuel cap securely
7. WARNING! and clean up spilled fuel.

SERIOUS INJURY OR
DEATH may result from
machine rollover. No smoking.

• Failure to follow these instructions could

result in serious injury or death.
• DO NOT operate machine on steep
Fill fuel tank to bottom of
slopes or near drop offs.
filler neck – MAXIMUM.
• Avoid sharp and/or quick turns.
• DO NOT exceed the machine weight
rating of the ROPS.
• ALWAYS use the seat belt when the SAFETY RULES
ROPS is locked in the upright position. The following safety instructions are based
• DO NOT jump if machine tips. on the B71.4 specifications of the American
• If ROPS is foldable: National Standards Institute and ISO 5395 in
— ALWAYS keep the ROPS fully effect at the time of production.
extended.
Training
— WHEN ROPS MUST BE DOWN:
Read, understand and follow all instructions
- DO NOT use seat belt.
on the machine and in the manual(s) before
- Drive with extra care. operating this unit.
• If equipped with seat platform:
Keep the area of operation clear of all
— DO NOT operate machine without persons, particularly small children. Be alert
seat platform pins in place or locks and shut off unit if children enter area.
engaged.
ALWAYS remove key and/or wire from spark
ROLLOVER PROTECTIVE STRUCTURE
plug before assembly, maintenance or
To maintain operator protection and roll bar service. Unintentional engine start up can
certification: cause death or serious injury.
• Replace a damaged roll bar, DO NOT
Complete a walk-around inspection of the
attempt to repair or modify.
unit to understand the unit, your work area
• Any alteration of the roll bar must be and all safety decals.
approved by the manufacturer.
Understand:
• DO NOT exceed the machine weight
rating of the roll bar. • How to operate all controls
• The functions of all controls
• How to STOP in an emergency
8. DANGER! • Braking and steering characteristics
• Turning radius and clearances
Keep hands and feet away If the operator or the mechanic cannot read
from all rotating or moving the manual, it is the owner’s responsibility to
parts. explain it to them.

EN - 6
Only allow responsible adults, who are Personal Protection
familiar with the instructions, to operate this
machine. DO NOT wear loose clothing or jewelry and
tie back hair that may get caught in rotating
ALWAYS train any inexperienced operators parts.
and require them to read and understand all
manuals and decals. Wear adequate outer garments.
Only the user can prevent and is responsible NEVER wear open sandals or canvas shoes
for accidents or injuries occurring to during operation. Wear adequate safety
themselves, other people or property. gear, protective gloves and footwear.
Wear proper footwear to improve footing on
Operator Age slippery surfaces.
DO NOT allow children under the age of 18 ALWAYS wear eye and ear protection when
to operate outdoor power equipment. operating machine.
Local regulations may restrict the age of the
operator.
Before Operation
Keep all nuts and bolts tight to be sure the
Data indicates operators above age 60 are
equipment is in safe working condition.
involved in a large percentage of riding
mower-related injuries. Maintain the machine to be in compliance
These operators should evaluate their ability with the maintenance schedule.
to operate the riding mower safely enough to Clean grass and debris from unit, especially
protect themselves and others from serious from around muffler and engine, to help
injury. prevent fires.
Check parking brake operation frequently.
Children Adjust and service as required.
Tragic accidents can occur if the operator is
Inspect unit before each use for missing or
not alert to the presence of children.
damaged decals and shields, correctly
Children are often attracted to the machine operating safety interlock system, and
and the mowing activity. NEVER assume deterioration of grass catchers. Replace or
that children will remain where you last saw repair as needed.
them.
Ensure Safety Interlock System is
Be alert and turn machine off if a child enters functioning properly. DO NOT operate unit if
the area. safety interlock is damaged or disabled.
Before and while backing, look behind and Start and operate unit only when seated in
down for small children. operator’s position. Steering control levers
NEVER carry children, even with the must be in neutral, PTO disengaged and
blade(s) shut off. They may fall off and be parking brake set when starting engine.
seriously injured or interfere with safe NEVER tamper with safety devices. Check
machine operation. Children who have been their proper operation regularly.
given rides in the past may suddenly appear
in the mowing area for another ride and be Keep machine free of grass, leaves, or other
run over or backed over by the machine. debris build-up. Clean up oil or fuel spillage
and remove any fuel-soaked debris.
NEVER allow children to operate the
machine. Operation
Use extreme care when approaching blind
Be sure the area is clear of bystanders
corners, shrubs, trees, or other objects that
before operating. Stop machine if anyone
may block your view of a child.
enters the area.
Keep children out of the mowing area and in
NEVER operate machine in a closed or
the watchful care of a responsible adult poorly ventilated area.
other than the operator.
ALWAYS maintain unit in safe operating
condition. Damaged or worn out muffler can
cause fire or explosion.

EN - 7
This product is equipped with an internal If you strike a foreign object, stop and
combustion type engine. DO NOT use unit inspect the machine. Repair, if necessary,
on or near any unimproved, forest-covered before restarting.
or brush covered land unless exhaust
NEVER leave a running machine
system is equipped with a spark arrester
unattended. ALWAYS turn off blade(s), set
meeting applicable local, state or federal
parking brake, stop engine and remove key
laws. A spark arrester, if it is used, must be
before dismounting.
maintained in effective working order by
operator. Disengage blade(s) when not mowing. Shut
off engine and wait for all parts to come to a
DO NOT operate machine while feeling
complete stop before cleaning the machine,
tired, ill or under the influence of alcohol or
removing the grass catcher, or unclogging
other drugs.
the discharge guard.
DO NOT put hands or feet near rotating
parts or under the machine. Keep clear of Operation Conditions
the discharge opening at all times.
Lightning can cause severe injury or death.
DO NOT touch parts which are hot. Allow
If lightning is seen or thunder is heard in the
parts to cool.
area, do not operate the machine; seek
DO NOT operate machine without the entire shelter.
grass catcher, discharge guard, or other ALWAYS check overhead and side
safety devices in place and working. clearances carefully before operation.
ALWAYS keep hands and feet away from all
Watch for traffic when operating near or
pinch points.
crossing roadways.
Avoid slippery surfaces. ALWAYS be sure of
Clear the area of objects such as rocks,
your footing.
wire, toys, etc., which could be thrown by the
NEVER carry passengers. blades.
NEVER direct discharged material toward Check for weak spots on docks, ramps or
anyone. Avoid discharging material against floors. Avoid uneven work areas and rough
a wall or obstruction. Material may ricochet terrain. Stay alert for hidden hazards or
back toward the operator. Stop the blade(s) traffic.
when crossing gravel surfaces.
Use care when approaching blind corners,
NEVER engage PTO when attachment, shrubs, trees or other objects that may
including mower blades, is not in use. obscure vision.
ALWAYS turn off power to attachment when Dust, smoke, fog, etc. can reduce vision and
not in active use such as traveling or cause an accident.
crossing driveways.
Operate machine only in daylight or good
ALWAYS disengage PTO, stop unit and
artificial light.
engine, remove key, engage parking brake
and allow moving parts to stop before
leaving operator’s position. Slope Operation
NEVER engage PTO while raising the Slopes are a major factor related to loss of
attachment, including mower blades, or control and tip-over accidents, which can
when attachment is in the raised position. result in severe injury or death. Operation on
all slopes requires extra caution. If you
Keep safety devices or guards in place and cannot back up the slope or if you feel
functioning properly. NEVER modify or uneasy on it, DO NOT mow it.
remove safety devices.
DO NOT operate on slopes of more than
DO NOT mow in reverse unless absolutely 15°.
necessary. ALWAYS look down and behind
before and while backing. Mow up and down slopes, not across.

Stop engine before removing grass catcher Watch for holes, ruts, bumps, rocks, or other
or unclogging chute. hidden objects. Uneven terrain could
overturn the machine. Tall grass can hide
Slow down before turning. obstacles.
DO NOT mow on moist or wet grass. Tires
may lose traction causing a loss of control.

EN - 8
Use extra care while operating machine with NEVER fill containers inside a vehicle or on
grass catchers or other attachments; they a truck or trailer bed with a plastic liner.
can affect the stability of the machine. DO ALWAYS place containers on the ground
NOT use on steep slopes. away from your vehicle before filling.
Keep all movements on the slope slow and NEVER fuel the machine indoors.
gradual. DO NOT make sudden changes in NEVER remove gas cap or add fuel with the
speed or direction, which could cause the engine running. Allow engine to cool before
machine to roll over. fueling.
Avoid starting, stopping, or turning on a
Fuel is highly flammable and its vapors are
slope. If the tires lose traction, disengage
explosive. Handle with care. Use only an
the blade(s) and proceed slowly straight
approved gasoline container with an
down the slope.
appropriately sized dispensing spout.
Operation on slopes may lead to loss of NO smoking, NO sparks, NO flames.
steering control. When operating on slopes
be prepared to react to an emergency Remove gas-powered equipment from the
situation: trailer and refuel it on the ground. If this is
not possible, then refuel such equipment
• Return steering levers to neutral
position. with a portable container, rather than from a
gasoline dispenser nozzle.
• Immediately set parking brake.
• Turn off PTO and engine. Keep the nozzle in contact with the rim of
the fuel tank or container opening at all
DO NOT try to stabilize the machine by times until the fueling is complete. DO NOT
putting your foot on the ground. use a nozzle lock-open device.
DO NOT park on slopes unless necessary. NEVER overfill fuel tank. Replace gas cap
When parking on slope, ALWAYS chock or and tighten securely.
block wheels. ALWAYS set parking brake.
If fuel is spilled on clothing, change clothing
Choose a low ground speed so you will not immediately.
have to stop or shift while on a slope.
DO NOT operate near drop-offs, ditches, or Towing/Transporting
embankments. Unit can suddenly turn over if
a wheel is over the edge of a cliff or ditch, or Follow the manufacturer’s recommendations
if an edge caves in. for weight limits for towed equipment and
towing on slopes.
DO NOT bypass transmission or allow
transmission to free-wheel when on a slope. NEVER allow children or others in or on
towed equipment.
Fuel Tow only with a machine that has a hitch
designed for towing. DO NOT attach towed
To avoid personal injury or property damage, equipment except at the hitch point.
use extreme care in handling gasoline.
Gasoline is extremely flammable and the On slopes, the weight of the towed
vapors are explosive. equipment may cause loss of control.
Ethanol blends must not exceed E10. Higher Travel slowly and allow extra distance to
ethanol content may cause your machine to stop.
run hotter and damage your engine.
Replace fuel cap securely and clean up
Accessories
spilled fuel before starting engine. Use only attachments recommended by
Extinguish all cigarettes, cigars, pipes, and AriensCo that are appropriate to your use
other sources of ignition. and can be used safely in your application.
Follow the manufacturer’s recommendation
Use only an approved gasoline container.
for wheel weights or counterweights
NEVER store the machine or fuel container
Check grass catcher components and the
where there is an open flame, spark, or pilot
discharge guard frequently and replace with
light such as on a water or space heater or
the manufacturer’s recommended parts,
other appliances.
when necessary.

EN - 9
Batteries Maintain or replace safety and instruction
labels, as necessary.
Avoid Electric Shock. Objects contacting
both battery terminals at the same time may Keep unit free of debris. Clean up oil or fuel
result in injury and unit damage. DO NOT spills.
reverse battery connections. ALWAYS block wheels and know all jack
Reverse connections may result in sparks stands are strong and secure and will hold
which can cause serious injury. ALWAYS weight of unit during maintenance.
connect positive (+) lead of charger to Release any pneumatic or hydraulic
positive (+) terminal, and negative (-) lead to pressure from components slowly.
negative (-) terminal. NEVER attempt to make any adjustments to
ALWAYS disconnect negative (-) cable unit while engine is running (except where
FIRST and positive (+) cable SECOND. specifically recommended). Stop engine,
ALWAYS connect positive (+) cable FIRST, remove key or spark plug wire and wait for
and negative (-) cable SECOND. all moving parts to stop before servicing or
Explosive Gases from battery can cause cleaning.
death or serious injury. Poisonous battery Lower cutting deck unless a positive
fluid contains sulfuric acid and its contact mechanical lock is used.
with skin, eyes or clothing can cause severe Allow engine to cool before servicing.
chemical burns.
Moving parts can cut or amputate fingers or
No flames, No sparks, No smoking near a hand. On multiblade mowers, rotation of
battery. one blade will cause all blades to rotate.
ALWAYS wear safety glasses and protective NEVER weld or straighten mower blades.
gear near battery. Use insulated tools.
NEVER make adjustments or repairs with
ALWAYS keep batteries out of reach of the engine running.
children.
Mower blades are sharp. Wrap the blade or
Battery posts, terminals and related wear gloves, and use extra caution when
accessories contain lead and lead servicing them.
compounds, chemicals known to the State of
California to cause cancer and reproductive ALWAYS keep body and hands away from
harm. Wash hands after handling. pin holes or nozzles which eject hydraulic
fluid under pressure.
Rollover Protection System (ROPS) Foreign fluid, such as hydraulic fluid,
injected into body can result in gangrene.
Frequently inspect ROPS and seat belt for
Fluid must be surgically removed within a
damage or loose hardware.
few hours by a doctor familiar with this form
Use extreme care when working close to of injury.
fences, ditches, or on hills.
Check overhead clearance carefully before Transporting Unit
driving under any objects.
Use extra care when loading or unloading
ALWAYS wear seat belt while operating the the machine into a trailer.
unit with the ROPS in the upright position.
Secure unit chassis to transport vehicle.
Only lower ROPS for transport. NEVER secure from rods or linkages that
DO NOT wear a seat belt while operating could be damaged.
the unit with the center bar in the lowered DO NOT transport machine while engine is
position. running.
DO NOT weld, cut, drill or modify ROPS in ALWAYS turn off power to attachment and
any manner unless instructed by the shut off fuel when transporting unit.
manufacturer.

Service
The use of non-genuine replacement parts
or accessories could adversely affect
machine operation and safety.
Do not change engine governor setting or
overspeed the engine.

EN - 10
Storage
NEVER store unit with fuel in fuel tank,
inside a building where any ignition sources
are present.
Keep machine free of grass, leaves, or other
debris build-up. Clean up oil or fuel spillage
and remove any fuel-soaked debris. Allow
machine to cool before storing.
For extended storage, shut off fuel and
clean unit thoroughly. See engine manual for
proper storage.

EN - 11
 ASSEMBLY

WARNING: Read and

understand the Safety section
before proceeding.
3
1. Remove wrap and packaging materials
from unit. 4
2. Remove unit from shipping container.
See Move Unit Manually on page 22. 1
3. Remove hardware from negative (-)
battery cable, but DO NOT discard. 2
4. Secure negative (-) battery cable to
negative (-) battery terminal with 1. Seat Cushion Bracket
hardware removed in step 3. 2. Seat Plate
5. Assemble seat. 3. Hairpin
a. Remove hairpin from clevis pin and 4. Clevis Pin
remove clevis pin from seat bracket. Figure 4
See Figure 3.
d. Remove backrest angle dial and
hardware from seat belt and secure
dial to seat. See Figure 5.

Figure 5

Figure 3 6. Lift discharge chute up slightly and rotate

to operating position. See Figure 6.
See Figure 4.
b. Rotate seat forward so top edge of
seat cushion bracket is below lower
hole in seat plate.
c. Reinstall clevis pin through lower hole
in seat plate and secure with hairpin.

Figure 6

EN - 12
7. Rotate ROPS to operating position and 11. Check tire pressures and inflate to
secure with lock pins. Secure lock pins recommendation. See Check Tire
with hairpins. See Figure 7. Pressure on page 26 and see
Specifications on page 45.
12. Make sure deck is level. See Level and
Pitch Mower Deck on page 40.
13. Ensure all hardware is tight.

1. ROPS
2. Lock Pin
3. Hairpin
Figure 7

8. Remove two eccentric spacers, two

round head square neck bolts and two
locking nuts from hardware bag.
9. Rotate steering levers to operating
position and install eccentric spacer
between steering lever plates. Secure
with hardware. See Figure 8.

1. Eccentric Spacer
2. Steering Lever
3. Steering Lever Plate
Figure 8

10. Adjust steering levers. See Adjust

Steering Levers on page 31.

EN - 13
 CONTROLS & FEATURES

12

31
9 35
7 26

30

23

28
29
19

32 10
18

17
34

20

33
3 2
8
25
11
27
22

4 1 5
6 21 24
Models 992273, 992275, Model 992278, 992279 Models 992282, 992283,
992276 992284

16 16

16

15 15 13 15
14 13 14 14 13

Figure 9

EN - 14
1. Ignition Key 18. Height-of-Cut Adjustment Dial
2. Choke Control Lever (Models 992273, 19. Transport Lock Release Lever
992275, 992276) 20. Flip-up Discharge Chute
3. Throttle Control Lever 21. Seat Adjustment Lever
4. Power Take-off (PTO) Switch 22. Seat Height Adjustment Switch
5. Oil Pressure Warning Light 23. Lumbar Support Adjustment Lever
6. Malfunction Indicator Light (Models 24. Backrest Adjustment Dial
992278, 992279, 992282, 992283, 25. Armrest Angle Adjustment Knob (2)
992284)
26. Seat Latch
7. 12V Power Port
27. Seatbelt
8. Hour Meter
28. Battery (under seat)
9. Fuel Tank and Cap (2)
29. Parking Brake Lever
10. Fuel Valve
30. Steering Lever (2)
11. Fuel Gauge (2)
31. Rollover Protection Structure (ROPS)
12. Hydraulic Oil Expansion Tank (2)
32. Transaxle Bypass Valve (2)
13. Oil Fill / Dipstick
33. Anti-Scalp Wheel (6)
14. Oil Drain
34. Tool-less Belt Cover
15. Engine Oil Filter
35. Fuse Box
16. Air Filter
17. Deck Lift Pedal

EN - 15
 THROTTLE CONTROL LEVER
WARNING: AVOID INJURY.
See Figure 12.
Read and understand the Safety
section before proceeding. Controls engine speed.

See Figure 9 for all controls and features

locations.

IGNITION KEY
See Figure 10. Fast
Controls power to the engine. The key cannot
be removed when in on position.

On
Off
Slow
Start
Figure 12

POWER TAKE-OFF (PTO)

SWITCH
See Figure 13.
Controls power to mower blades. The engine
Figure 10 will not start with the PTO switch in the on
position.
CHOKE CONTROL LEVER PTO / Blades On
Models 992273, 992275, 992276
See Figure 11.
Controls air intake to the engine.

Choke
On

PTO /
Blades Off
Figure 13
Choke
Off FUEL VALVE
See Figure 14.
Controls fuel flow to the engine. Directs fuel
from left or right fuel tank or stops all fuel flow.

Figure 11
RIGHT LEFT
TANK TANK

OFF

Figure 14

EN - 16
OIL PRESSURE WARNING LIGHT TRANSPORT LOCK RELEASE
See Figure 15. LEVER
Illuminates when oil pressure is low. Stop See Figure 17.
engine immediately and refer to engine Releases deck from transport lock position.
manual. Transport lock will not engage with transport
lock release lever in rear position.

Transport
Lock
Engaged

Transport
Figure 15 Lock
Disengaged
MALFUNCTION INDICATOR
LIGHT
Models 992278, 992279, 992282, 992283,
992284
Illuminates when an engine-related problem
occurs. Stop engine immediately and refer to
engine manual.
Figure 17
DECK LIFT PEDAL
Raises mower deck to unlock height-of-cut SEAT ADJUSTMENT LEVER
dial and adjust setting.
Unlocks seat to allow operator to move seat
HEIGHT-OF-CUT ADJUSTMENT forward or backward and then lock in desired
position.
DIAL
See Figure 16. SEAT HEIGHT ADJUSTMENT
Sets the height of cut. SWITCH
Raises and lowers seat height for operator
comfort.

LUMBAR SUPPORT
ADJUSTMENT LEVER
Controls the lumbar support in the backrest
for operator comfort.

BACKREST ADJUSTMENT DIAL

Controls the angle of the backrest for
operator comfort.

ARMREST ANGLE ADJUSTMENT

KNOBS
Set armrest angle for operator comfort.
Figure 16
HOUR / MAINTENANCE METER
Measures and displays engine runtime.
TRANSPORT LOCK Some models also display service alerts and
Locks mower deck in the highest position for recommended service intervals.
transporting or moving unit from one work
area to another. See Transport Unit on
page 23.

EN - 17
PARKING BRAKE LEVER
See Figure 18.
BEFORE OPERATION
Engages the parking brake. The engine will
not start when brake is released.
WARNING: AVOID INJURY.
Brake Engaged (On) Read and understand the Safety
section before proceeding.

1. Know how to stop in an emergency. See

Emergency Stopping on page 21.
2. Check fuel level and add fuel if needed.
IMPORTANT: Use fresh unleaded fuel with
an octane rating of at least 87. DO NOT use
E85 blended fuels; the engine is not E20 /
E30 / E85 compatible. The maximum
recommended ethanol content is 10%.
Brake Released (Off) Gravely recommends using a quality fuel
stabilizer in all fuel. See Short-Term Storage
on page 44.
3. Check engine oil level and add oil if
needed. Refer to engine manual.
4. Check hydraulic oil level. See Check
Hydraulic System on page 25.
5. Check condition of air cleaner. Refer to
engine manual.
6. Check function of all controls.
Figure 18 7. Check function of the Safety Interlock
System by performing the tests below.
STEERING LEVERS Contact your Gravely dealer for repair if
any of the tests fail.
Control the direction and speed of unit. To
stop unit, return both steering levers to
WARNING: AVOID INJURY.
neutral.
Failure of Safety Interlock
ROLLOVER PROTECTION System together with improper
operation can result in severe
STRUCTURE (ROPS) personal injury.
Help protect operator that is wearing their
seatbelt in the event of a rollover. DO NOT
wear seatbelt when operating with ROPS in
the lowered position.

TRANSAXLE BYPASS VALVES

Engage and disengage transaxles so unit can
be moved with the engine off.

ANTI-SCALP WHEELS
Help prevent the deck from contacting the
ground and scalping the lawn when mowing
over high spots.

SAFETY INTERLOCK SYSTEM

Monitors the interaction of various unit
features for operator safety.

EN - 18
Test Steering PTO Parking Result Lower Center Bar
Levers Brake See Figure 20.
Starting Interlock
WARNING: AVOID INJURY.
1 Neutral Off Engaged Engine Lower the center bar only when
starts. needed to drive under an object.
2 Forward, On Engaged or Engine There is no rollover protection
Neutral, Disengaged does not with the center bar in the
Reverse start. lowered position. DO NOT wear
3 Forward, On Disengaged Engine seatbelt when ROPS is in
Neutral, or does not lowered position.
Reverse Off start.
1. Remove hairpins from lock pins and
Operating Interlock (Engine On)
remove lock pins from hinge plate.
4* Forward, On Engaged or Engine 2. Lower center bar and secure with lock
Neutral, Disengaged shuts off. pins and hairpins.
Reverse
IMPORTANT: Return center bar to the raised
5* Forward, On Disengaged Engine
position when clear of obstacles.
Neutral, or shuts off.
Reverse Off
Lowered Position With
* When operator lifts off seat. Bagger Installed

POSITION ROPS
IMPORTANT: Inspect ROPS and seatbelt for
damage and loose or missing hardware.
Raise Center Bar
See Figure 19.
1. Remove hairpins from lock pins and
remove lock pins from hinge plate.
2. Raise center bar and secure with lock
pins and hairpins.

WARNING: AVOID INJURY.

Seatbelt MUST be worn when
operating with center bar raised.

Lowered Position With

No Bagger Installed

Figure 19

Figure 20

EN - 19
ADJUST SEAT
WARNING: AVOID INJURY. 2
Make all seat adjustments with
the unit stopped, parking brake
engaged and engine off.

See Figure 21.

Set Seat Height
Toggle seat height adjustment switch left to
raise seat or right to lower seat.
Set Seat Position
1. While seated, pull seat adjustment lever 1
inward and slide seat forward or
backward to desired position.
2. Release lever and slide seat slightly
forward or backward to lock position. 1. Backrest Angle Dial
2. Armrest Height Adjustment Knob
Set Lumbar Support
Figure 22
• Lift lever to increase lumbar support.
• Lower lever to decrease lumbar support.
SET CUTTING HEIGHT
See Figure 23.
3 1. Push mower lift pedal forward to relieve
pressure from height-of-cut dial.
2. Disengage transport lock.
3. Rotate height-of-cut dial to desired
setting.
4. Slowly release mower lift pedal until deck
stops at selected height.

1. Seat Height Adjustment Switch

2. Seat Adjustment Lever
3. Lumbar Support Lever
Figure 21

See Figure 22.

Set Backrest Angle
Rotate dial on left side of seat to adjust Figure 23
backrest angle.
Set Armrest Angle
Turn height adjustment knob clockwise to
raise the front of armrest or counterclockwise
to lower front of armrest.

EN - 20
OPEN FUEL VALVE START THE ENGINE
See Figure 24. 1. Move steering levers to neutral position.
• Turn fuel valve toward the left or right fuel 2. Engage parking brake.
tank to use fuel from that tank. 3. Push PTO switch down to off position.
• Move valve to the off position when storing 4. Turn fuel valve to use fuel from desired
or transporting unit. tank.
5. Models 992273, 992275, 992276 only: If
engine is cold, move choke control lever
to on position. DO NOT use choke on a
warm engine.
6. Move throttle control lever to 3/4 fast
position.
Off 7. Insert ignition key and turn to the start
Right position. Release key when engine starts.
Tank NOTICE: Do not operate the starter for more
Left than 10 seconds per starting attempt. If the
Tank engine does not start, allow a 60-second cool
down period between starting attempts.
8. Models 992273, 992275, 992276 only:
Figure 24 Gradually move choke control lever to the
off position after engine starts.

OPERATE UNIT
OPERATION 1. Start the engine. See Start The Engine on
page 21.
2. Release parking brake.
WARNING: AVOID INJURY.
3. Set throttle control lever to fast position.
Read and understand the Safety
section before proceeding. IMPORTANT: Engaging the PTO knob with
the throttle lever set lower than fast position
IMPORTANT: All references to left, right, front can cause excessive belt wear. ALWAYS use
or rear are given from the perspective of fast position when engaging the PTO.
operator in operator’s position, facing the 4. Pull PTO switch up to on position.
direction of forward travel. IMPORTANT: Never engage the PTO if the
mower is plugged with grass or other
EMERGENCY STOPPING material. This may cause damage to the
electric clutch.
WARNING: AVOID INJURY.
Operating on slopes may lead to
WARNING: AVOID INJURY.
loss of steering control. Be
Move the steering levers slowly
prepared to react.
and keep the throttle at slow
speed until you learn how to
1. Place steering levers in neutral position operate the unit.
and rotate outward.
2. Engage parking brake. 5. Move steering levers to begin mowing.
3. Push PTO switch down to off position.
4. Turn key to off position and remove from
ignition.

EN - 21
Direction Lever Position STOP THE ENGINE
of Travel
WARNING: AVOID INJURY.
Forward Push both levers
Wait for all moving parts to stop
forward from
before leaving operator’s
neutral position.
position.

Reverse Pull both levers 1. Move steering levers to the neutral

backward from position.
neutral position. 2. Engage parking brake.
3. Reduce throttle to 3/4 fast position.
4. Push PTO switch down to off position.
Right Turn Push left lever
5. Move throttle control lever to slow
farther forward
position.
than the right
lever. 6. Turn key to off position and remove from
ignition.
Left Turn Push right lever MOVE UNIT MANUALLY
farther forward
See Figure 25.
than the left lever.
Bypass the transaxles to move the unit with
the engine off.
Stop Return both 1. Place unit in service position. See
levers to neutral Service Position on page 23.
position. 2. Turn both transaxle bypass valves 1/4
turn clockwise to the bypass position.
IMPORTANT: Aggressive turning can scuff or 3. Release parking brake and push unit to
damage lawns. Always keep both wheels desired location.
rotating when making sharp turns. DO NOT 4. Engage parking brake.
make turns with inside wheel completely
5. Turn both transaxle bypass valves 1/4
stopped. For minimum turning radius, slowly
turn counterclockwise to operating
reverse inside wheel while moving outside
position.
wheel slowly forward.
6. Return unit to operating position.
For Best Mowing Results
• Cut grass when it is dry.
• Keep mower blades sharp.
• Keep mower deck properly leveled.
• Adjust anti-scalp wheels to prevent
scalping.
• Do not set height of cut too low. For very
tall grass, mow twice.
• Do not travel too fast.
• Mow with engine at full throttle.
• When mulching, only remove 1/3 of grass
length per cutting. Do not cut more than 2.5
cm (1") at a time.
• Discharge clippings into areas already cut.
• Change cutting pattern with each mowing.
• Do not allow grass or debris to collect
Bypass Position
inside mower deck. Clean after each use.
(Transaxles
Disengaged)

Operating Position
(Transaxles
Engaged)
Figure 25

EN - 22
TRANSPORT UNIT
CAUTION: AVOID INJURY.
1. Move transport lock release lever
Seat assembly is heavy. Secure
forward.
your footing to accommodate
2. Push deck lift pedal completely forward to weight shift when rotating seat
engage transport lock. Release pedal. forward.
3. Move unit to transport vehicle.
4. Stop engine, engage parking brake,
remove key from ignition and turn fuel
valve to off position.
5. Secure mower frame to transport vehicle.
NOTICE: NEVER secure unit to vehicle from
rods or linkages that could be damaged.

RELEASE TRANSPORT LOCK

1. Push deck lift pedal forward and move
transport lock release lever to the rear
position.
2. Slowly return mower lift pedal to resting
position.

MAINTENANCE Figure 26

HOUR METER
WARNING: AVOID INJURY.
Timer measures engine runtime and cannot
Read and understand the Safety
be reset.
section before proceeding.
MAINTENANCE SCHEDULE
Proper maintenance can prolong the life of
unit. The Maintenance Schedule on Page 23

Every 100 hrs.

Every 400 hrs.
Every 500 hrs.
Every 25 hrs.
Every 50 hrs.
shows the recommended service schedule.
Each Use

Your Gravely dealer can provide service and

adjustments to keep your unit operating at
peak efficiency. Contact an authorized engine
manufacturer’s service center for engine Service Performed
service. Clean Debris from
•
More frequent service may be required due to Engine
working conditions (heavy loads, high Inspect Belt Cover
ambient temperatures, dusty conditions, or Grommets for •
airborne debris). Damage
See the maintenance instructions in the Check Safety
Engine Manual for additional information. •
Interlock System
SERVICE POSITION Check Hydraulic
•
System
See Figure 26.
1. Park unit on a flat, level surface. Check Engine Oil * •
2. Engage parking brake and rotate steering Change Engine Oil *
levers outward. Check Tire Pressure •
3. Stop engine, remove key and wait for Check Mower
moving parts to stop and for hot parts to •
Blades
cool.
Check Air Filter * •
4. Pull seat latch and rotate seat forward.
Check Carbon
5. Chock wheels. Strap and clamp unit onto •
Canister Filter
lift, if used.
Lubricate Unit •

EN - 23
 Fuel Stabilizer – 118ml A/R

Every 100 hrs.

Every 400 hrs.
Every 500 hrs.
Every 25 hrs.
Every 50 hrs.
(4 oz)
• Except Canada 04730300

Each Use
• For Canada Only 04742400
Hydraulic Oil Filter 2 21548300
Service Performed
Hydraulic Oil and Filter Kit 1 59222800
Check Parking
• Relay A/R 04438400
Brake
Clean Battery •
Clean Engine Models 992273, 992275, 992276
•
Cooling System * Description Qty. Part No.
Check Fasteners • Air Filter (Outer) 1 21545400
Check Belts • Air Filter (Inner) 1 21545300
Change Hydraulic Engine Oil Filter 1 21535800
•
Oil and Filter **
Fuel Filter 1 21538400
Lubricate Caster
• 23 x 10.5-12 Radial Tire 1 07101047
Fork Bearings
(Model 992273)
Lubricate Caster
• 24 x 12-12 Radial Tire 1 07101045
Wheel Bearings
(Models 992274, 992275,
Adjust Clutch‡ •
992276)
* Refer to engine manual for instructions.
** Change after first 75 hours of operation.
Model 992278, 992279
‡ Adjust clutch every 500 hours or once per
Description Qty. Part No.
season if used less than 500 hours.
Air Filter (Outer) 1 21537000
SERVICE PARTS Air Filter (Inner) 1 21536900
See your Gravely dealer to purchase service Engine Oil Filter 1 20715100
parts for your unit. Fuel Filter 1 21539500
Common Service Parts 24 x 12-12 Radial Tire 1 07101045
Description Qty. Part No.
PTO Belt (Engine to Deck) 1 07200729 Models 992282, 992283, 992284
– 52" Description Qty. Part No.
Mower Drive Belt – 52" 1 07200036 Air Filter 1 21563300
Mower Blade – 52" 3 00450300 Engine Oil Filter 1 21563100
Mulching Blade – 52" 3 04887600 Fuel Filter 1 21563200
PTO Belt (Engine to Deck) 1 07234600 Muffler Gasket 1 21563400
– 60" 23 x 10.5-12 Radial Tire 1 07101047
Mower Drive Belt – 60" 1 07200038 (Models 992282, 992289)
Mower Blade – 60" 3 09081200 24 x 12-12 Radial Tire 1 07101045
Mulching Blade – 60" 3 04887700 (Models 992283, 992284)
PTO Belt (Engine to Deck) 1 07200731
– 72"
Mower Drive Belt – 72" 1 07200039
Mower Blade – 72" 3 04774600
Mulching Blade – 72" 3 04887800
Transaxle Drive Belt 1 07200515

EN - 24
CHECK SAFETY INTERLOCK 2. Stop engine, remove key and wait for all
SYSTEM moving parts to stop and for hot parts to
cool.
See Before Operation on page 18. If system
3. Position container under oil filter to catch
does not operate correctly, see your dealer
used oil.
for repair. DO NOT operate until repairs are
made. 4. Remove hardware retaining transaxle
skid plate and remove skid plate. See
CHECK HYDRAULIC SYSTEM Figure 50.
See Figure 28.
Check Hydraulic Oil Level
5. Remove filter cover and o-ring from
See Figure 27.
transaxle. Retain cover; discard o-ring.
1. Place unit in service position. See
6. After oil has drained, remove oil filter and
Service Position on page 23.
discard.
2. Check oil level in expansion tanks. Oil
should reach the cold fill indicator mark.
IMPORTANT: Engine should be cold when
checking initial oil level.

1 1

1. Filter Cover
2. O-Ring
3. Oil Filter
Figure 28
1. Cold Fill Indicator Mark
Figure 27 7. Wipe filter-mounting surface clean.
8. Lubricate rubber gasket on new oil filter
3. Operate engine for 1 minute and recheck with clean hydraulic oil.
oil levels.
9. Spin filter onto filter housing until it makes
4. Add hydraulic oil, if needed. See Add contact, and then turn filter 3/4 turn to
Hydraulic Oil on page 25. tighten.
Add Hydraulic Oil 10. Reinstall filter cover.
1. Place unit in service position. See 11. Remove the vent / fill plug and add
Service Position on page 23. 15W-50 synthetic motor oil (Gravely
2. Remove hydraulic oil expansion tank p/n 00057100) or equivalent until oil
caps. appears at the bottom of the fill port
3. Fill expansion tanks with 15W-50 (4475 mL (151 fl. ounces) per transaxle).
synthetic motor oil (Gravely 12. Reinstall the vent / fill plug and torque to
p/n 00057100) or equivalent until oil 22.6 N•m (16.7 lb-ft).
reaches the cold fill indicator mark. See 13. Add hydraulic oil to expansion tank until
Figure 27. oil reaches cold fill indicator mark. See
4. Reinstall expansion tank caps. Check Hydraulic Oil Level, step 4.
14. Repeat steps 3 – 13 for other transaxle.
Change Hydraulic Oil and Filter
15. Purge hydraulic system.
1. Operate unit for a few minutes to warm
hydraulic oil.

EN - 25
Purge Hydraulic System CHECK MOWER BLADES
Purge air from hydraulic system after draining Check blades for wear. Replace or sharpen
oil or changing the filter. as needed.

WARNING: AVOID INJURY. CAUTION: AVOID INJURY. Use

This adjustment requires sturdy gloves or padding to
operating the engine. Use protect hands when working with
extreme care to avoid contact mower blades.
with moving parts and hot Rotation of one blade rotates the
surfaces. Be sure rear of unit is other blades.
well supported and secure
before starting engine.
Remove Blades
1. Park unit facing a wall or chock wheels. 1. Place unit in service position. See
Service Position on page 23.
2. Release parking brake.
2. Disconnect spark plug wires.
3. Support unit so drive wheels are off the
ground. See Figure 29.
4. Bypass transaxles. See Move Unit 3. Remove hardware retaining blades and
Manually on page 22. lower spindle guards to spindle and
remove parts. Retain all parts for
5. Start the engine and slowly move steering
reinstallation.
levers forward and backward 5 or 6 times.
4. Clean all grass, dirt and debris from
6. Stop engine.
upper and lower spindle guards.
7. Turn transaxle bypass valves to operation
position. See Move Unit Manually on
page 22.
8. Start engine.
3
9. Slowly move steering levers forward and
backward 5 or 6 times.
10. Stop engine, lower unit to ground and
check oil level. Add oil if needed.
11. Repeat steps 1 – 10 until transaxles
operate smoothly in forward and reverse
at normal speed without excessive noise. 2

CHECK TIRE PRESSURE

Check and adjust tire pressure. See
Specifications on page 45.

WARNING: AVOID INJURY. 1

Explosive separation of tire and
rim parts is possible.
• DO NOT inflate tires above 1. Mower Blade
maximum pressure on tire
2. Lower Spindle Guard
sidewalls.
3. Upper Spindle Guard
• DO NOT inflate tires with a
compressor; use a hand Figure 29
pump.
• DO NOT stand in front of tire
assembly when inflating. Use
a clip-on chuck and extension
hose long enough to allow you
to stand to one side.
• DO NOT mount a tire without
proper equipment and
experience.

EN - 26
Sharpen Blades 3. Check blade balance by sliding an
unthreaded bolt through center hole. Hold
the bolt level. If blade does not remain
CAUTION: DO NOT sharpen horizontal, sharpen the heavy end until
blades while attached to unit. blade is balanced.
Install Blades
1. Remove blades from unit. Discard blades See Figure 29.
if:
• More than 1.3 cm (1/2") of metal is CAUTION: Mating surfaces
removed. between spindle, lower spindle
• Air lifts are eroded. guard, blade and washer MUST
• Blades are bent or broken. be free of debris to ensure
correct tightness and alignment.
2. File or grind an equal amount of metal
from each cutting edge of the blade until
sharp. DO NOT change angle of cutting 1. Secure lower spindle guards and blades
edge or round the corner of the blade. to spindles with one bevel washer and
See Figure 30. hex bolt. Torque to 156 N•m – 217 N•m
(115 lb-ft – 160 lb-ft).
DO NOT sharpen to this pattern. 2. Reconnect spark plug wires.
1 CHECK PARKING BRAKE
IMPORTANT: Check brake on both sides of
2 unit.
1. Place unit in service position. See
Service Position on page 23.
See Figure 31.
2. Measure length of compression spring
and distance between the stop nut and
trunnion. Compression spring length
Sharpen to this pattern. 1 MUST be 3.8 cm (1 1/2") and the gap
between stop nut and trunnion MUST be
3.2 mm – 6.4 mm (1/8" – 1/4").
• If measurements are outside
specification, adjust parking brake. See
Adjust Parking Brake on page 33.
3
• If measurements are within
specification, no adjustment is needed.

DISCARD if more than

1.3 cm (1/2") 4

1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
Figure 30

CAUTION: Unbalanced blades

cause excessive vibration and
eventual damage to unit.
Balance blades before
reinstalling on unit.
NEVER weld or straighten
blades. Figure 31

3. Return unit to operating position.

EN - 27
CLEAN BATTERY 2. Reconnect positive cable and then the
negative cable.
WARNING: AVOID INJURY. 3. Place boot over positive terminal.
Battery posts, terminals and 4. Return seat to operating position.
related accessories contain lead
and lead compounds, chemicals CHARGE BATTERY
known to the State of California Check battery with a voltmeter. If battery is
to cause cancer and less than 11 volts, charge battery.
reproductive harm. Wash hands
after handling. NOTICE: DO NOT fast charge. Charging at a
higher rate damages or destroys battery.
ONLY use an automatic charger designed for
Remove Battery use with your battery.
See Figure 32.
NOTICE: Always follow information provided
1. Place unit in service position. See on battery by battery manufacturer. Contact
Service Position on page 23. battery manufacturer for details regarding
2. Disconnect the negative cable and then charging.
the positive cable from battery.
1. Remove battery from unit. See Remove
3. Remove wing knobs securing hold-down Battery on page 28.
bracket to battery and remove bracket.
2. Place battery on bench in a well-
4. Remove battery. ventilated area.
3. Connect positive lead of charger to
2 positive terminal.
4. Connect negative lead of charger to
negative terminal.
1 5. Charge battery following battery
3 manufacturer’s instructions.
6. Reinstall battery. See Install Battery on
page 28.
Jump Starting
Gravely does not recommend jump starting
5
your unit. Jump-starting can damage engine
and system components. Refer to engine
manual for details.

CHECK FASTENERS
4 Check for loose hardware and tighten if
necessary.

1. Battery LUBRICATE UNIT

2. Wing Knob 1. Apply oil to all pivot points and pin
3. Hold-Down Bracket connections.
4. Positive Battery Cable 2. Pump grease into grease fittings.
5. Negative Battery Cable Lubricate Caster Fork Bearings
Figure 32 See Figure 33.
1. Place steering levers in neutral position
Clean Battery and engage parking brake.
1. Clean terminals and battery cable ends 2. Stop engine, remove key and wait for all
with a wire brush. moving parts to stop and for hot parts to
2. Coat terminals with dielectric grease or cool.
petroleum jelly. 3. Remove dust cap.
Install Battery 4. Pump grease into fitting until grease
appears at the top of the upper bearing.
1. Install battery and secure with hold-down
bracket and wing knobs.

EN - 28
 1 SERVICE &
ADJUSTMENTS
ELECTRICAL SERVICE
See Figure 35.

2 Replace Fuse
IMPORTANT: To avoid damaging the circuit,
replace fuses with fuses of the same
amperage rating. Determine the cause of
electrical failure and repair before replacing
failed electrical components.
1. Dust Cap 1. Place unit in service position. See
2. Grease Fitting Service Position on page 23.
Figure 33 2. Remove defective fuse.
3. Determine cause of fuse failure and
5. Reinstall dust cap. repair condition.
4. Install new fuse.
Lubricate Caster Wheel Bearings
1. Place steering levers in neutral position Replace Relay
and engage parking brake. NOTICE: Relays are interchangeable. Use
2. Stop engine, remove key and wait for all only quality replacement parts. See Service
moving parts to stop and for hot parts to Parts on page 24.
cool. 1. Place unit in service position. See
3. Support unit so front wheels are off the Service Position on page 23.
ground. 2. Remove defective relay.
4. Remove wheel from fork. 3. Determine cause of relay failure and
See Figure 34. repair condition.
5. Remove end caps from wheel hub. 4. Install new relay.
6. Pump grease into fitting until grease
squeezes through the seal in the wheel
hub.
7. Wipe away excess grease.
8. Reinstall end caps onto wheel hub.
9. Reinstall wheel into fork and lower unit to
ground.
IMPORTANT: After tightening bolt, tire should
not have any side-to-side play. Tighten bolt
until there is a slight amount of drag on the
wheel bearing. The wheel should not spin
freely.

Figure 35
1

1. End Cap
2. Grease Fitting
Figure 34

EN - 29
ADJUST TRANSAXLES
Check For Excessive Creep

WARNING: AVOID INJURY. 2

This adjustment requires
operating the engine. Use
extreme care to avoid contact
with moving parts and hot
surfaces. Be sure rear of unit is
well supported and secure
before starting engine.

1. Operate unit for a minimum of 5 minutes

to warm hydraulic system.
2. Stop engine and engage parking brake.
3. Chock front wheels and support unit so
both drive wheels are off the ground. 1. Transaxle 1
4. Remove drive wheels. 2. Return-to-Neutral Screw
5. Start engine, move throttle lever to fast Figure 36
position and release parking brake.
6. Move steering levers forward and 2. Slowly turn transaxle control arm in the
backward 5 or 6 times and then return opposite direction of hub rotation until hub
levers to neutral position. stops. See Figure 37.
7. Check hubs for rotation.
• If there is only slight rotation, stop
engine, reinstall wheels and lower unit
to ground.
• If there is excessive rotation, set neutral
position as directed below. 2
IMPORTANT: Torque wheel lug nuts to 1
81.3 N•m – 122.0 N•m (60 lb-ft – 90 lb-ft).
Adjust Neutral Position
If wheel hub has excessive rotation after
checking for excessive creep, adjust neutral
position.
1. Loosen the return-to-neutral screw on the 1. Transaxle Control Arm
transaxle. See Figure 36. 2. Wheel Hub
Figure 37

3. Hold the transaxle control arm in position

and tighten the return-to-neutral screw.
4. Start engine, move throttle lever to fast
position and release parking brake.
5. Move steering levers forward and
backward 5 or 6 times and then return
levers to neutral position.
6. Check wheel hubs for rotation.
• If there is only slight rotation, stop
engine, reinstall wheels, return unit to
operating position and advance to
Adjust Parking Brake Interlock on Page
31.
• If there is excessive rotation, repeat
steps – 6.

EN - 30
IMPORTANT: Torque wheel lug nuts to Set Parking Brake Neutral
81.3 N•m – 122.0 N•m (60 lb-ft – 90 lb-ft). 1. Adjust transaxles. See Adjust Transaxles
on page 30.
ADJUST PARKING BRAKE
2. Stop engine, remove key and wait for
INTERLOCK moving parts to stop and for hot parts to
cool.
WARNING: AVOID INJURY.
3. Release parking brake.
This adjustment requires
operating the engine. Use 4. Loosen hardware retaining eccentric
extreme care to avoid contact spacer on the affected side(s).
with moving parts and hot 5. Engage parking brake and rotate
surfaces. Be sure unit is secure eccentric spacer so it aligns in brake
and will not move. interlock. See Figure 38.

If the parking brake interferes with the neutral

position of the steering levers and the
transaxles, the brake interlock may need
adjustment.
Check Parking Brake Interlock
1. Place unit in service position, but DO
NOT engage parking brake. Chock or
block wheels instead. See Service 2 1
Position on page 23.
2. Make sure steering levers are in neutral
position.
3. Watch the steering levers and engage
parking brake.
• If one or both steering levers move from
the neutral position, set parking brake 1. Parking Brake Interlock
neutral. See Set Parking Brake Neutral 2. Eccentric Spacer
on page 31.
Figure 38
• If there is little to no steering lever
movement, advance to step 4.
3. Tighten eccentric spacer hardware.
4. Start the engine and move the throttle
lever to fast position. 4. Stop engine, return unit to operating
position and adjust steering levers. See
• If the unit creeps or the transaxles make
Adjust Steering Levers on page 31.
a whining sound, set parking brake
neutral. See Set Parking Brake Neutral ADJUST STEERING LEVERS
on page 31.
• If the unit doesn’t move and the Align Steering Levers
transaxles are quiet, no adjustment is If there is more than 3.2 mm (1/8") between
needed. the horizontal alignment of the steering
5. Stop engine, return unit to operating levers, align the levers.
position and adjust steering levers. See 1. Place steering levers in neutral position
Adjust Steering Levers on page 31. and engage parking brake.
2. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
3. Loosen mounting hardware, align levers
and tighten hardware. See Figure 39.

EN - 31
 Adjust Height
See Figure 40.
The steering lever height may be adjusted for
operator comfort.
1. Place steering levers in neutral position
and engage parking brake.
2. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
3. Remove steering lever hardware and
remove steering lever from lower control
arm.
4. Position steering lever at desired height
and align with lower control arm. Secure
with original hardware.

Figure 39

Adjust Forward Position

The steering lever forward position may be
adjusted for operator comfort.
See Figure 39.
1. Place steering levers in neutral position
and engage parking brake.
2. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
3. Loosen mounting hardware on steering
lever assemblies.
4. Place steering levers in desired position:
Figure 40
• Gently push levers forward for greater
distance from operator.
5. Adjust steering lever position. See Adjust
• Gently pull levers back for closer Forward Position on page 32.
distance to operator.
6. Adjust eccentric spacer so levers are at
5. Tighten hardware. the same height and have a 1.3 cm – 2.5
IMPORTANT: The steering levers should not cm (1/2" – 1") gap between lever ends.
touch each other. There should be no more See Figure 41.
than 3.2 mm (1/8") difference between the
horizontal and vertical alignment of the
levers.

Figure 41

EN - 32
ADJUST UNIT TO DRIVE ADJUST PARKING BRAKE
STRAIGHT See Figure 43.
Adjust Tire Pressure IMPORTANT: Adjust both sides of parking
1. Place unit in service position. See brake equally.
Service Position on page 23. 1. Check parking brake. See Check Parking
2. Check tire pressures. If needed, adjust to Brake on page 27.
recommended pressures. See 2. Engage parking brake.
Specifications on page 45. 3. Loosen nuts behind compression spring
IMPORTANT: DO NOT inflate tires outside until tension is removed from spring.
recommended range. Then tighten stop nut against washer until
spring measures 3.8 cm (1 1/2") long.
3. Check tracking. If unit does not drive in
straight line, adjust limiter bolts. See 4. Tighten jam nut against stop nut.
Adjust Limiter Bolts on page 33. 5. Loosen nuts ahead of trunnion until there
is a 3.2 mm – 6.4 mm (1/8" – 1/4") gap
Adjust Limiter Bolts between the stop nut and trunnion.
See Figure 42. 6. Tighten jam nut against the stop nut.
Limiter bolts can be adjusted to increase or
decrease drive wheel speeds. To adjust:
1. Loosen jam nut.
• Turn limiter bolt counterclockwise to
increase maximum drive wheel speed
on that side.
• Turn limiter bolt clockwise to reduce
maximum drive wheel speed on that
side.
2. Tighten jam nut.
4
1

2 3
1. Jam Nut
1 2. Stop Nut
3. Trunnion
4. Compression Spring
5. Flat Steel Washer
2
Figure 43

7. Check brake function.

1. Lower Control Arm

2. Limiter Bolt
Figure 42

3. Adjust steering lever position. See Adjust

Forward Position on page 32.

EN - 33
REPLACE MOWER BELTS
CAUTION: Damaged or worn
belts may result in injury and / or
damage to the unit. Check belts
for excessive wear or cracks 4
often.
3
Remove PTO Belt
See Figure 44.
1. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
2. Engage parking brake.
1
3. Position mower deck at lowest cutting 2
height.
1. Spring
4. Move seat to rearmost position.
2. Anchor Bolt
5. Remove and retain belt covers. 3. PTO Belt Idler
6. Open access panel. 4. PTO Belt
Figure 45

Remove Mower Drive Belt

2 See Figure 46 and Figure 47.
1. Slowly remove spring hook from anchor
bolt to release tension from belt idler.
1
2. Remove mower drive belt.

Models 992273, 992282

2
1. Belt Cover
2. Access Panel
4
Figure 44

CAUTION: Use care when

releasing idler spring tension.
Keep body parts away from
idlers when performing this 1. Spring
operation. 2. Anchor Bolt
3. Mower Drive Belt Idler
See Figure 45. 4. Mower Drive Belt
3. Slowly remove spring hook from anchor
bolt to release tension from belt idler. Figure 46
4. Remove PTO belt.

EN - 34
 Install PTO Belt
Models 992274, 992275, 992276, 992278,
992279, 992283, 992284 IMPORTANT: Mower drive belt MUST be
installed before PTO belt. See Install Mower
Drive Belt on page 35.
1. Install PTO belt around clutch sheave at
3 rear of unit.
2
See Figure 49.
2. Install PTO belt around top groove of split
pulley at deck center and around left
spindle pulley.
1 3. Align belt with idler pulleys.
4. Reinstall idler spring hook around anchor
bolt to apply tension to belt.
4
3

1. Spring
2. Anchor Bolt
3. Mower Drive Belt Idler 1
4. Mower Drive Belt 1
Figure 47 4

Install Mower Drive Belt

See Figure 48.
1. Install mower drive belt around bottom
groove of split pulley at deck center and
around bottom groove of right spindle 2
pulley.
2. Reinstall idler spring hook around anchor
bolt to apply tension to belt. 1. Idler Pulley
2. Split Pulley
3. Left Spindle Pulley
4. PTO Belt
Figure 49

IMPORTANT: Make sure belts are correctly

aligned in pulleys.
2 1 5. Reinstall belt covers.
6. Close footboard.

1. Split Pulley
2. Right Spindle Pulley
3. Mower Drive Belt
Figure 48

EN - 35
REPLACE TRANSAXLE DRIVE
BELT
Remove Transaxle Drive Belt
1. Place steering levers in neutral position
and engage parking brake.
2. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
3. Remove PTO belt from clutch. See 1
Remove PTO Belt on page 34.

CAUTION: Use care when 2 3

releasing idler spring tension.
Keep body parts away from
idlers when performing this
operation.

4. Remove hardware retaining transaxle

skid plate and remove skid plate. See 1. Spring
Figure 50. 2. Transaxle Drive Idler
3. Eye Bolt
Figure 51

6. Remove hardware securing clutch stop

bracket to frame and remove bracket.
See Figure 52.

Figure 50

5. Loosen nut on eye bolt and disconnect

idler arm spring. See Figure 51.

1. Clutch Stop Bracket

2. Clutch 2
Figure 52

EN - 36
7. Remove clutch stop. See Figure 53.

2
1

1. Clutch Stop
Figure 53 5
4
8. Remove transaxle drive belt from drive
system in the following order: 1. Idler Pulley
2. Eye Bolt
a. From right transaxle sheave.
3. Right Transaxle
b. From left transaxle sheave.
4. Left Transaxle
c. From engine sheave.
5. Nut
Install Transaxle Drive Belt Figure 54
See Figure 54.
4. Reinstall clutch stop and mounting
1. Install transaxle drive belt to drive system
hardware. See Figure 53.
in the following order:
5. Reinstall clutch stop bracket and secure
a. Around left transaxle sheave.
with original hardware. See Figure 52.
b. Around engine sheave.
6. Return seat to operating position.
c. Around right transaxle sheave.
7. Reinstall PTO belt. See Install PTO Belt
2. Align belt with idler pulley. on page 35.
3. Reconnect idler arm spring to eye bolt 8. Reinstall transaxle skid plate and secure
and secure bolt to unit with nut. with original hardware. See Figure 50.
IMPORTANT: Make sure belt has tension and
is aligned in all pulleys. ADJUST ANTI-SCALP WHEELS
See Figure 55.
The anti-scalp wheels are set at the factory
for typical mowing height, but can be adjusted
for high or low cutting conditions.
1. Place steering levers in neutral position
and engage parking brake.
2. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
3. Remove hardware securing anti-scalp
wheels to deck and remove wheels.
4. Position wheels as necessary:
• For a very high cutting height, set the
anti-scalp wheels in the lowest position
on the bracket.

EN - 37
 • For a very low cutting height, set the ADJUST DECK LIFT ASSIST
anti-scalp wheels in the highest position
See Figure 57.
on the bracket.
The deck lift assist springs may be adjusted
5. Secure with original hardware.
to modify deck lift assist and deck stability.
IMPORTANT: All anti-scalp wheels MUST be Increased spring tension leads to easier deck
set to the same height. lifting, but also decreases deck stability.
1. Loosen jam nuts on anchor bolts.
2. Adjust spring anchors equally on each
side of deck.
• Turn spring anchors counterclockwise
to decrease lift assist and increase
deck stability.
• Turn spring anchors clockwise to
increase lift assist and decrease deck
stability.
IMPORTANT: Excessive spring tension
increases the potential for deck to lift and
bounce over rough terrain and affect cut
quality.

Figure 55 3. Measure distances between spring

anchors and trunnions to ensure they are
equal. Readjust spring tension if
ADJUST DECK LIFT PEDAL necessary.
See Figure 56. IMPORTANT: Lift assist springs MUST be
1. Place steering levers in neutral position adjusted equally.
and engage parking brake.
4. Tighten jam nuts against spring anchors.
2. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
3. Remove hardware securing deck lift
pedal to deck lift arm.
1
4. Place pedal in desired position.
5. Reinstall hardware and torque to 71 N•m
– 95 N•m (52 lb-ft – 70 lb-ft).

1. Jam Nut
2. Anchor Bolt
3. Spring Anchor
4. Trunnion
Figure 57

Figure 56

EN - 38
REMOVE / INSTALL MOWER See Figure 59.
DECK 7. Remove hardware retaining deck lift links
to deck lift brackets.
Remove Deck 8. Remove rear mounting pins securing
1. Place unit in service position. See mounting arms to deck.
Service Position on page 23.

WARNING: AVOID INJURY.

Springs store energy. Keep body
parts away from pinch points 3
when removing the deck.

2. Remove PTO belt from clutch. See

Remove PTO Belt on page 34.
2
1
WARNING: AVOID INJURY.
Mower lift arms and lift pedal
could cause severe injury if the
lift-assist springs are not
disconnected before the lift links.

3. Move transport lock release lever forward 1. Mounting Pin

and push deck lift pedal completely 2. Deck Lift Link
forward to engage transport lock. 3. Mounting Arm
4. Position supports such as blocks or jack Figure 59
stands under each side of the deck.
5. Slowly disconnect lift-assist springs from 9. Slide deck out from under unit.
spring peg on each side of deck. See
Figure 58. Install Deck
See Figure 59.
1. Position deck under unit.
2 2. Connect rear mounting arms to deck with
mounting pins. Secure with original
hardware.
3. Secure deck lift links to deck lift brackets
1 with original hardware.
4. Reinstall PTO belt around clutch. See
Install PTO Belt on page 35.
5. Move transport lock release lever forward
and push deck lift pedal completely
forward to engage transport lock.
6. Reconnect lift-assist springs to spring
pegs.
7. Level the deck. See Level and Pitch
Mower Deck on page 40.
1. Lift-Assist Spring
2. Spring Peg
Figure 58

6. Release transport lock and slowly lower

deck until it rests on supports.

EN - 39
LEVEL AND PITCH MOWER Level Mower Deck
DECK See Figure 62.
IMPORTANT: Make sure unit is on a flat, 1. Lower the high side of deck:
level surface and that tires are inflated to the a. Loosen jam nuts against deck-
recommended pressures. leveling links.
Check Blade Level and Pitch b. Turn adjustment bolts
counterclockwise.
1. Place steering levers in neutral position
and engage parking brake. c. Measure distance between the
ground and cutting edges of left and
2. Stop engine, remove key and wait for
right blades. Continue adjustment if
moving parts to stop and for hot parts to
necessary.
cool.
d. Tighten jam nuts against deck-
3. Raise deck to 3 1/2" (8.9 cm) cutting
leveling links.
height.
2. Raise the low side of deck:
See Figure 60.
a. Loosen jam nuts against deck-
4. Position mower blades so ends point left
leveling links.
to right across the width of the deck.
b. Turn adjustment bolts clockwise.
5. Measure the distance between the
ground and the cutting edge of the left c. Measure distance between the
and right blades. If the measurements are ground and cutting edges of left and
not within 4.7 mm (3/16") of each other, right blades. Continue adjustment if
level the deck. See Level Mower Deck on necessary.
page 40. d. Tighten jam nuts against deck-
leveling links.

Raise

Lower 1
Figure 60

See Figure 61.

6. Position mower blades so ends point
front to back and measure the following:
• At the front of the deck, measure the
2
distance between the ground and the
cutting edge of the middle blade.
• At the rear of the deck, measure the
3
distance between the ground and the
cutting edge of the left and the right
blades.
1. Adjustment Bolt
2. Jam Nut
3. Deck-Lift Link
Figure 62

Figure 61

If the front measurement is not 3.2 mm (1/8")

lower than the rear measurements, adjust the
blade pitch. See Adjust Blade Pitch on
page 41.

EN - 40
Adjust Blade Pitch ADJUST CLUTCH
IMPORTANT: Side-to-side deck heights NOTICE: Adjust clutch every 500 hours or
MUST remain even after completing pitch once per season if used less than 500 hours.
adjustment.
See Figure 63.
NOTICE: Pitching the front of the blades If clutch operates incorrectly or sounds
lower than the rear provides a balance abnormal, check the gap at the three
between cut quality and the power needed to inspection slots.
cut grass. Certain cutting conditions require
the deck rear to be pitched lower than the Check Clutch
front. Positioning the deck this way requires 1. Place unit in service position. See
more engine power but can provide better cut Service Position on page 23.
quality. 2. Measure gap between the armature and
1. Increase forward pitch: rotor:
a. Loosen jam nuts against all deck- • A 0.4 mm – 0.5 mm (0.016" – 0.020")
leveling links. feeler gauge should fit between the
b. Turn front adjustment bolts armature and rotor and make slight
counterclockwise to lower deck front. contact with each.
c. Turn rear adjustment bolts clockwise 3. Repeat measurement for remaining
to raise deck rear. inspection slots.
d. Check adjustment. See Check Blade 4. If gap is within range, no adjustment is
Level and Pitch on page 40. needed.
e. Tighten jam nuts against deck- Adjust Clutch
leveling links. 1. Place unit in service position. See
2. Decrease forward pitch: Service Position on page 23.
a. Loosen jam nuts against all deck- 1. Loosen adjustment nut until a
leveling links. 0.5 mm (0.020") feeler gauge fits between
b. Turn front adjustment bolts clockwise armature and rotor.
to raise deck front. 2. Tighten adjustment nut until armature and
c. Turn rear adjustment bolts rotor make slight contact with feeler
counterclockwise to lower deck rear. gauge.
d. Check adjustment. See Check Blade 3. Repeat at remaining inspection slots.
Level and Pitch on page 40. NOTICE: Air gap MUST be even at all
e. Tighten jam nuts against deck- inspection slots.
leveling links.

3
1

2
1. Inspection Slot
2. Armature
3. Rotor
4. Gap Adjustment Nut

Figure 63

EN - 41
 TROUBLESHOOTING
Problem Probable Cause Correction
Push PTO switch down to off
PTO switch is in the on position.
position.
Parking brake is released. Engage parking brake.
Fuel tank is empty. Fill fuel tank. See Before Operation
on page 18.
Fuel supply is contaminated. Replace with clean fuel.
Battery is not charged. Charge battery. See Charge Battery
on page 28.
Engine does not
start. Battery cables are loose or Clean and tighten cables. See Clean
corroded. Battery on page 28.
Spark plug wire(s) are loose or Connect spark plug wire(s) or
spark plug(s) are faulty. replace spark plug(s). Refer to
engine manual.
Safety Interlock System is not Check Safety Interlock System. See
engaged or is faulty. Before Operation on page 18.
Electrical system is faulty. Contact your Gravely dealer.
Engine is faulty. Contact your Gravely dealer.
Choke control lever is engaged. Move lever to off position. See
(Models 992273, 992275, Choke Control Lever on page 16.
992276)
Fuel tank is empty. Fill fuel tank. See Before Operation
on page 18.
Spark plug is faulty. Replace spark plug. Refer to engine
Engine runs rough. manual.
Fuel filter is dirty. Clean or replace filter. Refer to
engine manual.
Air filter cartridge is plugged. Clean or replace air filter cartridge.
Refer to engine manual.
Engine is faulty. Contact your Gravely dealer.
Engine oil level is low. Add engine oil. Refer to engine
manual.
Engine overheats. Cooling fins are plugged. Clean engine. Refer to engine
manual.
Engine is faulty. Contact your Gravely dealer.
Engine runs when Ignition ground wire is Connect ground wire to clean, metal
ignition key is in the disconnected. surface.
off position. Ignition switch is faulty. See your Gravely dealer.
Parking brake is engaged. Release parking brake.
Transaxles are bypassed. Turn transaxle bypass valves to
operating position. See Move Unit
Manually on page 22.
Transaxle drive belt is faulty. Replace transaxle drive belt. See
Unit does not drive. Replace Transaxle Drive Belt on
page 36.
Transaxles are faulty. Contact your Gravely dealer.
Transaxle drive system is faulty. Contact your Gravely dealer.
Hydraulic oil level is low. Add hydraulic oil. See Check
Hydraulic System on page 25.

EN - 42
 Operator presence switch is not Activate switch by sitting on seat.
engaged.
Operator presence switch is Contact your Gravely dealer.
faulty.
PTO does not work.
PTO belt is faulty. Replace PTO belt. See Replace
Mower Belts on page 34.
PTO switch, wiring, connectors Contact your Gravely dealer.
or clutch are faulty.
Unit moves with Parking brake needs adjustment. Adjust parking brake lever. See
engine off and Adjust Parking Brake on page 33.
parking brake Parking brake is faulty. Contact your Gravely dealer.
engaged.
Tire pressure is incorrect. Check tire pressure. See
Unit does not drive Specifications on page 45.
straight. Steering levers need adjustment. See Adjust Unit to Drive Straight on
page 33.
Unit creeps when Transaxles need adjustment. See Adjust Transaxles on page 30.
steering levers are Parking brake interlock needs See Adjust Parking Brake Interlock
in neutral position. adjustment. on page 31.
Mower blades not level or mower Level and adjust pitch of mower
deck pitch is incorrect. deck. See Level and Pitch Mower
Deck on page 40.
Mower blades are dull or faulty. Sharpen or replace mower blades.
See Sharpen Blades on page 27.
Mowing speed is too fast. Drive slower when cutting grass.
Unit has poor
cutting quality. Belt tension or condition is poor. Replace PTO belt or mower drive
belt. See Replace Mower Belts on
page 34.
Cutting height is too low. Do not set height of cut too low. For
very tall grass, mow twice.
Clutch is faulty, damaged or Adjust clutch or see your Gravely
slipping. dealer.
Oil pressure is low. Stop engine immediately and refer to
Oil pressure light is
engine service manual or see your
illuminated.
Gravely dealer.
Malfunction System has detected an engine Stop engine immediately and refer to
indicator light is malfunction. engine service manual or see your
illuminated (Models Gravely dealer.
992278, 992279,
992282, 992283,
992284).

EN - 43
 START-OF-SEASON
STORAGE PREPARATION
1. Before adding fuel for the first time after
WARNING: AVOID INJURY. long-term storage, add fresh, stabilizer-
Read and understand the Safety treated fuel to fuel tank and any fuel
section before proceeding. containers with remaining fuel.
2. Charge and install the battery.

SHORT-TERM STORAGE
IMPORTANT: NEVER wash unit with high- ACCESSORIES
pressure water or store outdoors.
See your Gravely dealer for a complete list of
1. Allow unit to cool and clean with mild
compatible accessories and attachments for
soap and water.
your unit.
2. Tighten all hardware to correct
specifications. Description Part No.
3. Inspect unit for visible signs of wear or 52" Discharge Cover Kit 79104300
damage. Repair as needed. 60" Discharge Cover Kit 79213400
4. Prepare fuel system for storage. Solid Tire Kit 79101000
NOTICE: Gravely recommends using a 12" Gravely Hub Cap Kit 79102100
quality fuel stabilizer in all fuel. Gasoline left (Set of 2)
in the fuel system without a stabilizer, even 24 x 12 – 12 BAR-Style Tire Kit 79205200
for short periods of time, deteriorates and (60" Deck)
leaves gummy deposits in the system that
may cause damage. For the best Flextend™ Kit 79102300
effectiveness, add stabilizer to all fuel Hitch Kit 79215800
containers whenever purchasing fuel. Add Headlight Kit 79216200
the stabilizer to the container before adding
Mulching Kit 52" Decks 79215500
fuel.
Mulching Kit 60" Decks 79215600
a. Add Gravely fuel stabilizer (see
Service Parts on page 24) or Mulching Kit 72" Decks 79215700
equivalent according to Lawn Striper Kit 79213200
manufacturer's instructions to the fuel 6" Wheel Covers (Set of 2) 79210600
tank and any fuel containers with Powered Deck Lift Kit 79217100
remaining fuel.
Operator Controlled Discharge 79215400
b. Operate engine outdoors for at least
Baffle Kit
5 minutes to allow stabilizer to reach
the carburetor. Sunshade Kit 79216900
5. Close fuel valve and allow engine to stop Hardshell Sunshade Kit 79218000
on its own. 52" Behai Baffle Kit 79218900
6. Turn key to off position and remove from 60" Behai Baffle Kit 79219000
ignition. 72" Behai Baffle Kit 79219100
7. Store unit in a cool, dry, protected area. 18" LE Mower Blade Kit 79219300
DO NOT store unit outdoors.
20.5" LE Mower Blade Kit 79219400
LONG-TERM STORAGE 24.5" LE Mower Blade Kit 79219500
1. Perform short-term storage procedures.
2. Lubricate as directed in Maintenance on Bagger Kits*
page 23. Base Kit 89205100
3. Touch-up all scratched painted surfaces. • Kit for 52" Decks 79216300
4. Remove and charge battery as directed • Kit for 60" Decks 79216400
in Charge Battery on page 28. Store
battery in a cool, dry, protected area. • Kit for 72" Decks 79216500
5. Store unit in a cool, dry, protected area. *Bagger kits are ordered in two parts.
DO NOT store unit outdoors. Complete baggers require Base Kit
89205100 plus the kit matching the deck size
of the unit.

EN - 44
 SPECIFICATIONS
Model Number 992273 992275
Description Pro-Turn 452 Pro-Turn 460
Engine Kawasaki FX850 Kawasaki FX1000
Displacement – cm3 (in3) 852 (52) 999 (61)
Maximum RPM – No Load 3600 ±100
Oil Capacity Refer to engine manual.
Liquid or Air Cooled Air
Electrical
Starter Electric
Battery 12-Volt Maintenance-Free, 300 CCA 10U1L
PTO (Power Take-off) Electric PTO Clutch / Brake
Fuel
Tank Capacity – liter (gal) 49 (13)
Type Refer to engine manual.
Transmission
Type Hydrostatic Drive
Use 15W-50 synthetic motor oil
Oil
(Gravely p/n 00057100) or equivalent
Hydraulic Oil Filter Yes
Drive Speed
Forward Maximum – km/h (mph) 20.8 (13.0)
Reverse Maximum – km/h (mph) 9.6 (6.0)
Turning Radius Zero
Brakes Parking
Mower Deck
Cutting Height – cm (in) 2.5 – 14.0 (1 – 5.5)
Cutting Height Increments – cm (in) 0.635 (0.25)
Cutting Width – cm (in) 132.1 (52.0) 152.4 (60.0)
Deck Lift Mechanical Dial
Size and Weight
Length – cm (in) 203.2 (80.0)
Width – cm (in)
• Discharge Chute Down 171.5 (67.5) 191.0 (75.0)
• Discharge Chute Up 141.0 (55.5) 160.0 (63.0)
Height – cm (in)
• With ROPS extended 177.8 (70.0)
• With ROPS folded 121.3 (47.8)
Weight – kg (lb) 606 (1337) 635 (1400)
Tires
Front Tire Size – in 15 x 6-6 (Semi-Pneumatic)
Rear Tire Size – in 23 x 10.5-12 Radial 24 x 12-12 Radial
Recommended Rear Tire Pressure – kPa 83 – 103 (12 – 15)
(psi)

EN - 45
 SPECIFICATIONS
Model Number 992276 992278 992279
Description Pro -Turn 472 Pro-Turn 460 EFI Pro -Turn 472 EFI
Engine Kawasaki FX 1000 Kohler ECV880 EFI
Displacement – cm3 (in3) 999 (61) 824 (50)
Maximum RPM – No Load 3600 ±100
Oil Capacity Refer to engine manual.
Liquid or Air Cooled Air
Electrical
Starter Electric
Battery 12-Volt Maintenance-Free, 300 CCA 10U1L
PTO (Power Take-off) Electric PTO Clutch / Brake
Fuel
Tank Capacity – liter (gal) 49 (13)
Type Refer to engine manual.
Transmission
Type Hydrostatic Drive
Oil Use 15W-50 synthetic motor oil
(Gravely p/n 00057100) or equivalent
Hydraulic Oil Filter Yes
Drive Speed
Forward Maximum – km/h 20.8 (13.0)
(mph)
Reverse Maximum – km/h
9.6 (6.0)
(mph)
Turning Radius Zero
Brakes Parking
Mower Deck
Cutting Height – cm (in) 2.5 – 14.0 (1.0 – 5.5)
Cutting Height Increments –
cm (in) 0.635 (0.25)
Cutting Width – cm (in) 183.0 (72.0) 152.4 (60.0) 183.0 (72.0)
Deck Lift Mechanical Dial
Size and Weight
Length – cm (in) 207.8 (81.8) 203.2 (80.0) 207.8 (81.8)
Width – cm (in)
• Discharge Chute Down 221.0 (87.0) 190.5 (75.0) 221.0 (87.0)
• Discharge Chute Up 191.0 (75.0) 160.0 (63.0) 191.0 (75.0)
Height – cm (in)
• With ROPS extended 177.8 (70.0)
• With ROPS folded 121.3 (47.8)
Weight – kg (lb) 650 (1433) 635 (1400) 650 (1433)
Tires
Front Tire Size – in 15 x 6-6 (Semi-Pneumatic)
Rear Tire Size – in 24 x 12-12 Radial
Recommended Rear Tire
83 – 103 (12 – 15)
Pressure – kPa (psi)

EN - 46
 SPECIFICATIONS
Model Number 992282 992283 992284
Pro-Turn 452 Pro-Turn 460 Pro-Turn 472
Description EFI EFI EFI
Engine Yamaha
MX775V Yamaha MX825V

Displacement – cm3 (in3) 824 (50)

Maximum RPM – No Load 3600 +100/-50
Oil Capacity Refer to engine manual.
Liquid or Air Cooled Air
Electrical
Starter Electric
Battery 12-Volt Maintenance-Free, 300 CCA 10U1L
PTO (Power Take-off) Electric PTO Clutch / Brake
Fuel
Tank Capacity – liter (gal) 49 (13)
Type Refer to engine manual.
Transmission
Type Hydrostatic Drive
Oil Use 15W-50 synthetic motor oil
(Gravely p/n 00057100) or equivalent
Hydraulic Oil Filter Yes
Drive Speed
Forward Maximum – km/h (mph) 20.8 (13.0)
Reverse Maximum – km/h (mph) 9.6 (6.0)
Turning Radius Zero
Brakes Parking
Mower Deck
Cutting Height – cm (in) 2.5 – 14.0 (1.0 – 5.5)
Cutting Height Increments – cm (in) 0.635 (0.25)
Cutting Width – cm (in) 132.1 (52.0) 152.4 (60.0) 183.0 (72.0)
Deck Lift Mechanical Dial
Size and Weight
Length – cm (in) 203.2 (80.0) 203.2 (80.0) 207.8 (81.8)
Width – cm (in)
• Discharge Chute Down 171.5 (67.5) 190.5 (75.0) 221.0 (87.0)
• Discharge Chute Up 141.0 (55.5) 160.0 (63.0) 191.0 (75.0)
Height – cm (in)
• With ROPS extended 177.8 (70.0)
• With ROPS folded 121.3 (47.8)
Weight – kg (lb) 606.5 (1337.0) 635.0 (1400.0) 650.0 (1433.0)
Tires
Front Tire Size – in 15 x 6-6 (Semi-Pneumatic)
Rear Tire Size – in 23 x 10.5-12 24 x 12-12 Radial
Radial
Recommended Rear Tire Pressure –
83 – 103 (12 – 15)
kPa (psi)

EN - 47
 Warran
ty
Outdoor Power
Equipment
Limited Warranty
AriensCo warrants to the original purchaser that Gravely brand products purchased on or after 9/1/2019 will
be free from defects in material and workmanship for the time period noted in the chart below.
If any product is rented or leased, then the duration of these warranties shall be 90 days after the date of
purchase.
An authorized Gravely dealer will repair any defect in material or workmanship, and repair or replace any
defective part, subject to the conditions, limitations and exclusions set forth herein. Such repair or
replacement will be free of charge (labor and parts) to the original purchaser; except as noted below. Pick-up
and delivery are at the owner’s expense.
The warranty code is found on the model and serial number identification label on the unit.

Warranty
Product Group Warranty Period
Code
AA Serialized Attachments 1 Year.
AB Serialized Attachments 2 Years.
CH Pro-Turn Z and Pro-Turn ZX Mowers 4 Years or 750 Hours.*
CJ Pro-QXT 4 Years or 500 Hours.*
Compact-Pro and Pro-Walk Hydro
CK 4 Years or 750 Hours.* No Hour Limit for First 2 Years.
Mowers
CL Pro-Turn 100 and Pro-Stance Mowers 5 Years or 1000 Hours.* No Hour Limit for First 2 Years.
CM Pro-Turn 200 Mowers 5 Years or 1250 Hours.* No Hour Limit for First 2 Years.
CN Pro-Turn 400 Mowers 5 Years or 1500 Hours.* No Hour Limit for First 2 Years.
CO Pro-Walk Gear Mowers 2 Years.
HF ZT-X Mowers 3 Years or 300 Hours.*
HG ZT-XL Mowers 4 Years or 400 Hours.*
HH ZT-HD Mowers 4 Years or 500 Hours.*
UG Atlas JSV 1 Year.

* Whichever comes first.

Special Extensions
The chart below details special extensions to warranty terms. Warranty terms are total time periods
covered. If any product is rented or leased, there are no extensions to the 90-day warranty.
Warranty Code Warranty Term Extension Warranty Period Detail
Warranty is for parts only after the
CL, CM, CN, CO Mower
Deck Shell and Main Lifetime Limited. initial warranty period. Components
Frame are covered for manufacturer’s defect
only, not wear.

EN - 48
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Exclusions and Limitations
The charts below detail special exclusions and limitations to this warranty.

Warranty Term Exclusions Warranty Period

Air filters, brake arms, brake linings, brake shoes, brushes, cutters, fuel
filters, headlights, knives, light bulbs, lubricants, mower blades, oil, oil Components are not covered
filters, spark plugs, scraper blades, shear bolts, skid shoes and spoon under warranty.
tines.

Hydro-Gear Transaxle Limitation

See Hydro-Gear warranty. The warranty is administrated by AriensCo. Refer to www.gravely.com for
warranty statement.

Warranty Term Limitations Warranty Period

Cloth, Plastic and Rubber Components. Components are covered for manufacturer’s defect only, not
Mufflers, Tires and Belts. wear.

Exclusions – Items Not Covered by This Warranty

• Parts that are not genuine Gravely service parts are not covered by this warranty and may void the war-
ranty if the parts result in premature wear or damage to the product.
• Damages resulting from the installation or use of any part, accessory, or attachment which is not approved
by the AriensCo for use with product(s) identified herein are not covered by this warranty.
• Any misuse, alteration, improper assembly, improper adjustment, neglect, or accident which requires
repair is not covered by this warranty.
• Repairs or adjustments required due to failure to use fresh fuel or failure to properly prepare the unit for
periods of non-use.
• Use of gasoline blends exceeding 10% ethanol voids any and all warranties.
• Any tampering with the hour meter voids any and all warranties.
• Products are designed to the specifications in the area that the product was originally distributed. Differ-
ent areas may have significantly different legal and design requirements. This warranty is limited to the
requirements in the area in which the unit was originally distributed. AriensCo does not warrant this prod-
uct to the requirements of any other area. Warranty service is limited to service within the area originally
distributed.
• In countries other than the United States and Canada, contact the AriensCo dealer for
warranty policies that govern within your country. Rights may vary from country to country and within any
one country.

Evaporative Emissions Control Warranty Exception

As required by the California Air Resources Board (CARB) and the US Environmental Protection Agency
(EPA) the evaporative emissions control system is warranted to the ultimate purchaser, and any subsequent
owner, for two years.

The CARB and EPA evaporative emissions control system warranty is described in a separate evaporative
emission control warranty statement.

EN - 49
3/20 • 05299900B
Special Exclusions for Job-site Vehicles
The following uses void the warranty terms on Atlas JSV (Warranty Code UG) vehicles:
• Renting or leasing the vehicle.
• Using the vehicle to tow or carry loads in excess of the limits specified in the operator’s manual.
• Modifying the vehicle with parts and accessories that are not genuine or authorized Gravely parts or
accessories.
• Modifying the vehicle without express written authorization from Gravely.
• Operating the vehicle when it has not been completely and properly assembled and
pre-delivered by an authorized Gravely dealer.

Battery Warranty
Battery warranty is one year. Units used for rental or lease have no exceptions to the 90-day warranty. Total
battery claim reimbursement will not exceed 45.00 USD.

Engines
The chart below details engine warranty information. Engine warranty terms may vary from the specific terms
of this warranty. If inconsistent, the terms of the engine warranty shall apply to the engine and its component
parts.

Engine
Manufacturer Detail

Serial Number 0000400 4 Years or 500 Hours, whichever comes first. Refer to
and lower www.gravely.com for warranty statement.
Gravely V-Twin
Serial Number 0000401 4 Years or 750 Hours, whichever comes first. Refer to
and higher www.gravely.com for warranty statement.
Yamaha Yamaha-branded engines are warranted by the manufacturer and the warranty is
administrated by AriensCo. Refer to www.gravely.com for warranty statement.
Briggs &
Stratton, Covered by the engine manufacturer’s warranty.
Kawasaki, Refer to the engine manufacturer’s warranty statements.
Kohler

Parts and Accessories

Service replacement parts and non-serialized accessories are warranted for 90 days from date of purchase.
Parts and accessories must be installed by an authorized Gravely dealer to be covered. Labor is not
included.

Customer Responsibilities
Register the product immediately at the time of sale. If the dealer does not register the product, the
customer must register the unit on-line at www.gravely.com.

To obtain warranty service, the original purchaser must:

• Ensure that the maintenance and adjustments explained in the Operator’s Manual are routinely
completed.
• Promptly notify AriensCo or an authorized Gravely service representative of the need for warranty
service.
• Transport the product to and from the place of warranty service at owner’s expense.
• Have the warranty service performed by an authorized Gravely service representative.

To find an authorized dealer use the dealer locator on our websites, or contact us by mail or phone.

Globally except Australia or New Australia: New Zealand:

Zealand:
AriensCo Masport Australia Pty Ltd Masport Ltd
655 W. Ryan Street 27 Commercial Drive 1-37 Mt. Wellington Highway,
Brillion, WI 54110 Dandenong South Panmure,
Phone: (920) 756 - 4688 Victoria 3175 Auckland 1060
www.gravely.com Australia New Zealand
Phone: 1300 366 225 Phone: 0800 627 7678
www.masport.com.au www.masport.co.nz

EN - 50
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Disclaimer
AriensCo may from time to time change the design of its products. Nothing contained in this warranty shall be
construed as obligating the AriensCo to incorporate such design changes into previously manufactured
products, nor shall such changes be construed as an admission that previous designs were defective.

Limitation of Remedy and Damages

AriensCo liability under this warranty, and under any implied warranty that may exist, is limited to repair of
any defect in workmanship, and repair or replacement of any defective part. AriensCo shall not be liable for
incidental, special, or consequential damages (including lost profits). Some states do not allow the exclusion
of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

Australian Consumer Law

The following applies solely to warranties subject to Subsection 102(1) of the Australian Consumer Law: Our
goods come with guarantees that cannot be excluded by the Australian Consumer Law. You are entitled to a
replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or
damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable
quality and failure does not amount to a major failure.

Disclaimer of Further Warranty

AriensCo makes no warranty, express or implied, other than what is expressly made in this warranty. If the
law of your state provides that an implied warranty of merchantability, or an implied warranty of fitness for
particular purpose, or any other implied warranty, applies to AriensCo then any such implied warranty is
limited to the duration of this warranty. Some states do not allow limitations on how long an implied warranty
lasts, so the above limitation may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from region to
region.

EN - 51
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655 West Ryan Street
Brillion, WI 54110

www.gravely.com

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