Gravely Pro-Turn 100 User manual

Operator’s Manual
Manuel de l'utilisateur
Pro-Turn 100
04886500 •8/15
Printed in USA
ENGLISH
FRANÇAIS
E10
The use of any gasoline exceeding 10% ethanol (E10) or
10% MTBE will void the product warranty.
L’utilisation d’une essence contenant plus de 10%
d’éthanol (E10) ou de 10% de MTBE annulent la garantie.
Models
991119 – Pro-Turn 148
(SN 050000 +)
991120 – Pro-Turn 152
(SN 050000 +)
991121 – Pro-Turn 160
(SN 050000 +)
991122 – Pro-Turn 148
(SN 050000 +)
991123 – Pro-Turn 152
(SN 050000 +)
991124 – Pro-Turn 160
(SN 050000 +)
991125 – Pro-Turn 152
(SN 050000 +)
991126 – Pro-Turn 160
(SN 050000 +)
991127 – Pro-Turn 148 CARB
(SN 050000 +)
™

WELCOME . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY. . . . . . . . . . . . . . . . . . . . . . . . . 3
Practices & Laws . . . . . . . . . . . . . . . . . . 3
Required Operator Training. . . . . . . . . . 3
Safety Alert Symbols . . . . . . . . . . . . . . . 3
Signal Words . . . . . . . . . . . . . . . . . . . . . 3
Safety Decals. . . . . . . . . . . . . . . . . . . . . 4
Safety Rules. . . . . . . . . . . . . . . . . . . . . . 7
ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . 12
CONTROLS AND FEATURES . . . . . . . 14
OPERATION . . . . . . . . . . . . . . . . . . . . . 15
Controls and Features . . . . . . . . . . . . . . 15
Conversion Table. . . . . . . . . . . . . . . . . . 16
Seat Adjustments. . . . . . . . . . . . . . . . . . 17
Hour / Maintenance Meter . . . . . . . . . . . 17
Rollover Protection Structure (ROPS) . . 17
Filling Fuel Tank. . . . . . . . . . . . . . . . . . . 18
Pre-Start. . . . . . . . . . . . . . . . . . . . . . . . . 19
Starting and Shut Off . . . . . . . . . . . . . . . 19
stopping in an emergency . . . . . . . . . . . 19
To Mow with Unit . . . . . . . . . . . . . . . . . . 19
Parking. . . . . . . . . . . . . . . . . . . . . . . . . . 20
Moving the Unit with the Engine Off. . . . 20
For Best Performance . . . . . . . . . . . . . . 20
MAINTENANCE SCHEDULE . . . . . . . . 21
SERVICE AND ADJUSTMENTS . . . . . 23
Service Position. . . . . . . . . . . . . . . . . . . 23
Hydraulic Fluid. . . . . . . . . . . . . . . . . . . . 23
Carbon Canister Filter . . . . . . . . . . . . . . 25
Mower Blades . . . . . . . . . . . . . . . . . . . . 25
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Steering Control Neutral Adjustment . . . 27
Adjusting the Unit to Track Straight . . . . 28
Adjusting Steering Levers . . . . . . . . . . . 28
Adjusting the Parking Brake. . . . . . . . . . 29
PTO Belt . . . . . . . . . . . . . . . . . . . . . . . . 29
Mower Decks. . . . . . . . . . . . . . . . . . . . . 31
Clutch Adjustment . . . . . . . . . . . . . . . . . 34
STORAGE. . . . . . . . . . . . . . . . . . . . . . . 34
ACCESSORIES. . . . . . . . . . . . . . . . . . . 35
SERVICE PARTS . . . . . . . . . . . . . . . . . 36
SPECIFICATIONS. . . . . . . . . . . . . . . . . 37
WARRANTY . . . . . . . . . . . . . . . . . . . . . 40
TABLE OF CONTENTS

EN - 1
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?
gravely.custhelp.com • gravely.com
A parts manual for your unit is available for free download or purchase
at gravely.com.
Manual del operador español está disponible para su descarga gratuita
o compra en gravely.com.
PRODUCT REGISTRATION
You or the dealer you purchased the unit
from must register the product at the time of
purchase. Know the model and serial
numbers of your unit and register online at
gravely.com or return the registration card to
Ariens Company. See Figure 1 for label
location.
Record model number here.
Record serial number here.
MANUALS
Before operating or servicing the unit,
carefully and completely read the manuals
provided with the unit. They contain safety
instructions and important information about
unit controls.
The engine on this unit is covered by a
separate manual. Refer to the engine manual
for engine service recommendations.
Contact the engine manufacturer for a
replacement manual if necessary.
It is your responsibility to read and
understand all safety precautions and
instructions in the manuals. If you do not
understand or have difficulty following the
instructions, contact your Ariens dealer for
assistance. To locate your nearest Gravely
dealer, go to gravelymower.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
Model & Serial Number Label

EN - 2
EMISSION CONTROL SYSTEM
This equipment and/or its engine may
include exhaust and evaporative emissions
control system components required to meet
U.S. Environmental Protection Agency (EPA)
and/or California Air Resources Board
(CARB) regulations. Tampering with
emission controls and components by
unauthorized personnel may result in severe
fines or penalties. Emission controls and
components can only be adjusted by an
Ariens Company dealer or an authorized
engine manufacturer's service center.
Contact your Ariens Company equipment
retailer concerning emission controls and
component questions.

EN - 3
Read these safety rules and follow them
closely. Failure to follow these rules could
lead to loss of control of unit, severe personal
injury or death to you or bystanders or result
in damage to property or the machine.
PRACTICES & LAWS
Practice usual and customary safe working
precautions. Learn applicable rules and laws
in your area. Always follow the practices set
forth in this manual.
REQUIRED OPERATOR
TRAINING
The original purchaser of this unit was
instructed by the seller on safe and proper
operation. If unit is to be used by someone
other than the original purchaser, loaned,
rented, or sold, ALWAYS provide this manual
and any needed safety training before
operation.
SAFETY ALERT SYMBOLS
SIGNAL WORDS
The safety alert symbols above and signal
words below are used on decals and in this
manual.
Read and understand all safety messages.
1. Danger
2. Warning
3. Caution
4. Notice
NOTICE: Indicates information or procedures
that are considered important but not hazard
related. If not avoided property damage could
result.
5. Important
IMPORTANT: Indicates general reference
information worthy of special attention.
SAFETY
WARNING: This cutting machine is
capable of amputating hands and
feet and throwing objects. Failure to
observe the safety instructions in
the manuals and on decals could
result in serious injury or death.
Slopes are a major factor related to
loss-of-control and tip-over
accidents. Operation on all slopes
requires extra caution.
Tragic accidents can occur if the
operator is not alert to the presence
of children. Never assume that
children will remain where you last
saw them.
Gasoline is extremely flammable
and the vapors are explosive,
handle with care.
Disengage attachment, stop unit
and engine, remove key, engage
parking brake, and allow moving
parts to stop before leaving
operator’s position.
These are safety alert
symbols. They mean:
• ATTENTION!
• YOUR SAFETY IS
INVOLVED!
When you see this symbol:
• BECOME ALERT!
• OBEY THE MESSAGE!
DANGER: Indicates an
IMMINENTLY HAZARDOUS
SITUATION! If not avoided, WILL
RESULT in death or serious injury.
WARNING: Indicates a
POTENTIALLY HAZARDOUS
SITUATION! If not avoided, COULD
RESULT in death or serious injury.
CAUTION: Indicates a
POTENTIALLY HAZARDOUS
SITUATION! If not avoided, MAY
RESULT in minor or moderate injury.
It may also be used to alert against
unsafe practices.

EN - 4
SAFETY DECALS
This cutting machine is capable of amputating
hands and feet and throwing objects. Failure
to observe the following safety instructions
could result in serious injury or death.
The safety decals on your machine are visual
reminders of the important safety information
found in this manual. All messages found on
your unit must be fully understood and
carefully followed. Safety decals found on the
machine are explained below.
Always replace missing or damaged safety
decals. Replacement decals can be found in
the parts manual for your machine and
ordered from your dealer.
Refer to Figure 2 for safety decal locations.
1. Safety Decal Identification
KEEP HANDS and FEET AWAY
02988100
07800401
P
07800403
Figure 2
1
2
5
3
6
7
4
8

EN - 5
2. Safety Decal Description
1. DANGER!
DANGER!
Read and understand the
operator’s manual before
operating unit.
1.1 Amputation Hazard
To avoid amputation hazard
do not put hands near
rotating blades.
To avoid amputation hazard
do not put hands near
moving belts.
Keep hands away from all
rotating or moving parts.
Keep all guards and shields
in place.
1.2 Discharge Hazard
Discharge Hazard – NEVER
direct discharge toward
people, pets or property.
Thrown objects can cause
injury or damage.
Keep children and others
away from unit while unit is
in operation.
Do not operate mower
unless all guards are in
operating position or bagger
is attached.
1.3 Tipping Hazard
Avoid tipping hazard.
DO NOT operate on slopes
over 15°.
DO NOT operate on slopes
over 15°.
1.4 Service Hazard
Before servicing unit do the
following:
Read owners manual before
servicing or making
adjustments to unit.
Set parking brake.
Remove key and disconnect
spark plug before servicing
or making adjustments to
unit.
1.5 Bystander Hazard
DO NOT operate the unit in
the presence of bystanders.
Do not carry passengers.
5
5
P

EN - 6
Look behind when operating
the unit in reverse.
1.6 Loss of Traction Hazard
If loss of traction is
experienced do the
following:
Disengage PTO.
Look before backing.
Proceed off slope slowly.
Do not try to turn or speed
up.
2. DANGER! Discharge Hazard –
NEVER operate unit
without discharge chute in
operating position. Thrown
objects can cause injury or
damage.
Do not operate mower
unless all guards are in
operating position or
bagger is attached.
3. DANGER!
Discharge Hazard – NEVER
direct discharge toward
people, pets or property.
Thrown objects can cause
injury or damage.
Amputation Hazard –
NEVER stick hands or feet
under deck or shielded
areas.
Shut off engine, remove key,
and read manual before
servicing or making
adjustments to unit.
Keep children and others
away from unit while unit is
in operation.
Keep feet and hands away
from all rotating or moving
parts.
DO NOT step or stand in
this area.
4. DANGER! Discharge Hazard –
NEVER operate unit
without discharge chute in
operating position. Thrown
objects can cause injury or
damage.
Do not operate mower
unless all guards are in
operating position or
bagger is attached.

EN - 7
SAFETY RULES
This cutting machine is capable of amputating
hands and feet and throwing objects. Failure
to observe the following safety instructions
could result in serious injury or death.
The following safety instructions are based
on the B71.4 specifications of the American
National Standards Institute in effect at the
time of production.
5. HOT SURFACES!
DO NOT touch parts which
are hot from operation.
ALWAYS allow parts to
cool.
6. ROTATING PARTS!
AVOID INJURY. Stay clear
of rotating parts.
7. WARNING!
SERIOUS INJURY OR
DEATH MAY RESULT
FROM MACHINE
ROLLOVER
• Failure to follow these instructions
could result in serious injury or death
• Do not operate machine on steep
slopes or near drop offs
• Avoid sharp and/or quick turns
• Do not exceed the machine weight
rating of the ROPS
• Always use the seat belt when the
ROPS is locked in the upright
position
• Do not jump if machine tips
• If ROPS is foldable
– Always keep the ROPS fully
extended
– WHEN ROPS MUST BE DOWN
• Do not use seat belt
• Drive with extra care
• If equipped with seat platform:
Do not operate machine without seat
platform pins in place or locks
engaged.
ROLLOVER PROTECTIVE STRUCTURE
To maintain operator protection and roll bar
certification:
• Replace a damaged roll bar, do NOT
attempt to repair or modify.
• Any alteration of the roll bar must be
approved by the manufacturer.
• DO NOT exceed the machine weight
rating of the roll bar.
8. DANGER!
DANGER! Keep hands
and feet away from all
rotating or moving parts.
Training
Read, understand, and follow allinstructions
on the machine and in the manuals before
starting.
Be sure the area is clear of bystanders and
pets before operating. Stop machine if
anyone enters the area.
Improper use of power equipment can cause
serous permanent injury or death to the
operator or a bystander.
Understand:
• How to operate all controls
• The functions of all controls
• How to STOP in an Emergency
• Braking and steering characteristics
• Turning radius and clearances
If the operator or the mechanic cannot read
the manual, it is the owner’s responsibility to
explain it to them.
Always train any inexperienced operators
and require them to read and understand all
manuals and decals.
Only allow responsible adults, who are
familiar with the instructions, to operate this
machine.
Only the user can prevent and is responsible
for accidents or injuries occurring to
themselves, other people or property.

EN - 8
Operator Age
Do not allow children under the age of 18 to
operate any outdoor power equipment.
Local regulations may restrict the age of the
operator.
Data indicates operators age 60 years and
above are involved in a large percentage of
riding mower-related injuries.
These operators should evaluate their ability
to operate the riding mower safely enough to
protect themselves and others from serious
injury.
Children
Tragic accidents can occur if the operator is
not alert to the presence of children.
Children are often attracted to the machine
and the mowing activity. Never assume that
children will remain where you last saw
them.
Be alert and turn machine off if a child enters
the area.
Before and while backing, look behind and
down for small children.
Never carry children, even with the blade(s)
shut off. They may fall off and be seriously
injured or interfere with safe machine
operation. Children who have been given
rides in the past may suddenly appear in the
mowing area for another ride and be run
over or backed over by the machine.
Never allow children to operate the machine.
Use extreme care when approaching blind
corners, shrubs, trees, or other objects that
may block your view of a child.
Keep children out of the mowing area and in
the watchful care of a responsible adult
other than the operator.
Personal Protection
DO NOT wear loose clothing or jewelry and
tie back hair that may get caught in rotating
parts.
Wear adequate outer garments.
NEVER wear open sandals or canvas shoes
during operation. Wear adequate safety
gear, protective gloves and footwear.
Wear proper footwear to improve footing on
slippery surfaces
Always wear eye and ear protection when
operating machine.
Before Operating
Keep all nuts and bolts tight to be sure the
equipment is in safe working condition.
Maintain the machine to be in compliance
with the maintenance schedule.
Clean grass and debris from unit, especially
from around muffler and engine, to help
prevent fires.
Check parking brake operation frequently.
Adjust and service as required.
Inspect unit before each use for missing or
damaged decals and shields, correctly
operating safety interlock system, and
deterioration of grass catchers. Replace or
repair as needed.
Ensure Safety Interlock System is
functioning properly. DO NOT operate unit if
safety interlock is damaged or disabled.
Start and operate unit only when seated in
operator’s position. Steering control levers
must be in neutral, PTO disengaged and
parking brake set when starting engine.
Never tamper with safety devices. Check
their proper operation regularly.
Keep machine free of grass, leaves, or other
debris build-up. Clean up oil or fuel spillage
and remove any fuel-soaked debris.
Operation
Be sure the area is clear of bystanders
before operating. Stop machine if anyone
enters the area.
Never operate machine in a closed or poorly
ventilated area.
ALWAYS maintain unit in safe operating
condition. Damaged or worn out muffler can
cause fire or explosion.
This product is equipped with an internal
combustion type engine. DO NOT use unit
on or near any unimproved, forest-covered
or brush covered land unless exhaust
system is equipped with a spark arrester
meeting applicable local, state or federal
laws. A spark arrester, if it is used, must be
maintained in effective working order by
operator.
Do not operate machine while under the
influence of alcohol or drugs.
Do not put hands or feet near rotating parts
or under the machine. Keep clear of the
discharge opening at all times.
DO NOT touch parts which are hot. Allow
parts to cool.

EN - 9
Do not operate machine without the entire
grass catcher, discharge guard, or other
safety devices in place and working.
Always keep hands and feet away from all
pinch points.
Avoid slippery surfaces. Always be sure of
your footing.
Never carry passengers.
Never direct discharged material toward
anyone. Avoid discharging material against
a wall or obstruction. Material may ricochet
back toward the operator. Stop the blade(s)
when crossing gravel surfaces.
Never engage PTO when attachment,
including mower blades, is not in use.
Always turn off power to attachment when
not in active use such as traveling or
crossing driveways.
Always disengage PTO, stop unit and
engine, remove key, engage parking brake
and allow moving parts to stop before
leaving operator’s position.
Never engage PTO while raising the
attachment, including mower blades, or
when attachment is in the raised position.
Keep safety devices or guards in place and
functioning properly. Never modify or
remove safety devices.
Do not mow in reverse unless absolutely
necessary. Always look down and behind
before and while backing.
Stop engine before removing grass catcher
or unclogging chute.
Slow down before turning.
If you strike a foreign object, stop and
inspect the machine. Repair, if necessary,
before restarting.
Never leave a running machine unattended.
Always turn off blade(s), set parking brake,
stop engine and remove key before
dismounting.
Disengage blade(s) when not mowing. Shut
off engine and wait for all parts to come to a
complete stop before cleaning the machine,
removing the grass catcher, or unclogging
the discharge guard.
Know the weight of loads. Limit loads to
those you can safely control and the unit can
safely handle.
Operating Conditions
Always check overhead and side clearances
carefully before operation.
Watch for traffic when operating near or
crossing roadways.
Clear the area of objects such as rocks,
wire, toys, etc., which could be thrown by the
blades.
Check for weak spots on docks, ramps or
floors. Avoid uneven work areas and rough
terrain. Stay alert for hidden hazards or
traffic.
Use care when approaching blind corners,
shrubs, trees or other objects that may
obscure vision.
Dust, smoke, fog, etc. can reduce vision and
cause an accident.
Operate machine only in daylight or good
artificial light.
Slope Operation
Slopes are a major factor related to loss of
control and tip-over accidents, which can
result in severe injury or death. Operation on
all slopes requires extra caution. If you
cannot back up the slope or if you feel
uneasy on it, do not mow it.
DO NOT operate on slopes of more than
15°.
Mow up and down slopes, not across.
Watch for holes, ruts, bumps, rocks, or other
hidden objects. Uneven terrain could
overturn the machine. Tall grass can hide
obstacles.
Do not mow on moist or wet grass. Tires
may lose traction causing a loss of control.
Use extra care while operating machine with
grass catchers or other attachments; they
can affect the stability of the machine. Do
not use on steep slopes.
Keep all movements on the slope slow and
gradual. Do not make sudden changes in
speed or direction, which could cause the
machine to roll over.
Avoid starting, stopping, or turning on a
slope. If the tires lose traction, disengage
the blade(s) and proceed slowly straight
down the slope.

EN - 10
Operation on slopes may lead to loss of
steering control. When operating on slopes
be prepared to react to an emergency
situation:
• Return steering levers to neutral
position.
• Immediately set parking brake.
• Turn off PTO and engine.
DO NOT try to stabilize the machine by
putting your foot on the ground.
DO NOT park on slopes unless necessary.
When parking on slope always chock or
block wheels. Always set parking brake.
Choose a low ground speed so you will not
have to stop or shift while on a slope.
DO NOT operate near drop-offs, ditches, or
embankments. Unit can suddenly turn over if
a wheel is over the edge of a cliff or ditch, or
if an edge caves in.
Do not bypass transmission or allow
transmission to free-wheel when on a slope.
Fuel
To avoid personal injury or property damage,
use extreme care in handling gasoline.
Gasoline is extremely flammable and the
vapors are explosive.
Ethanol blends must not exceed E10. Higher
ethanol content may cause your
machine to run hotter and damage your
engine.
Replace fuel cap securely and clean up
spilled fuel before starting engine.
Extinguish all cigarettes, cigars, pipes, and
other sources of ignition.
Use only an approved gasoline container.
Never store the machine or fuel container
where there is an open flame, spark, or pilot
light such as on a water or space heater or
other appliances.
Never fill containers inside a vehicle or on a
truck or trailer bed with a plastic liner.
Always place containers on the ground away
from your vehicle before filling.
Never fuel the machine indoors.
Never remove gas cap or add fuel with the
engine running. Allow engine to cool before
fueling.
Fuel is highly flammable and its vapors are
explosive. Handle with care. Use only an
approved gasoline container with an
appropriately sized dispensing spout.
NO smoking, NO sparks, NO flames.
Remove gas-powered equipment from the
trailer and refuel it on the ground. If this is
not possible, then refuel such equipment
with a portable container, rather than from a
gasoline dispenser nozzle.
Keep the nozzle in contact with the rim of
the fuel tank or container opening at all
times until the fueling is complete. Do not
use a nozzle lock-open device.
Never overfill fuel tank. Replace gas cap
and tighten securely.
If fuel is spilled on clothing, change clothing
immediately.
Towing
Followthemanufacturer’srecommendations
for weight limits for towed equipment and
towing on slopes.
NEVER allow children or others in or on
towed equipment.
Tow only with a machine that has a hitch
designed for towing. Do not attach towed
equipment except at the hitch point.
On slopes, the weight of the towed
equipment may cause loss of control.
Travel slowly and allow extra distance to
stop.
Accessories
Follow the manufacturer’s recommendation
for wheel weights or counterweights
Check grass catcher components and the
discharge guard frequently nad replace with
the manufacturer’s recommended parts,
when necessary.
Use only Ariens Company-recommended
attachments that are appropriate to your use
and can be used safely in your application.
Batteries
Avoid Electric Shock. Objects contacting
both battery terminals at the same time may
result in injury and unit damage. DO NOT
reverse battery connections.
Reverse connections may result in sparks
which can cause serious injury. Always
connect positive (+) lead of charger to
positive (+) terminal, and negative (-) lead to
negative (-) terminal.
ALWAYS disconnect negative (-) cable
FIRST and positive (+) cable SECOND.
ALWAYS connect positive (+) cable FIRST,
and negative (-) cable SECOND.

EN - 11
Explosive Gases from battery can cause
death or serious injury. Poisonous battery
fluid contains sulfuric acid and its contact
with skin, eyes or clothing can cause severe
chemical burns.
No flames, No sparks, No smoking near
battery.
ALWAYS wear safety glasses and protective
gear near battery. Use insulated tools.
ALWAYS keep batteries out of reach of
children.
Battery posts, terminals and related
accessories contain lead and lead
compounds, chemicals known to the State of
California to cause cancer and reproductive
harm. Wash hands after handling.
Rollover Protection System (ROPS)
Frequently inspect ROPS and seat belt for
damage or loose hardware.
Use extreme care when working close to
fences, ditches, or on hills.
Check overhead clearance carefully before
driving under any objects.
Always wear seat belt while operating the
unit with the ROPS in the upright position.
Only lower ROPS for transport.
Do not wear a seat belt while operating the
unit with the center bar in the lowered
position.
Do not weld, cut, drill or modify ROPS in any
manner unless instructed by the
manufacturer.
Service
Maintain or replace safety and instruction
labels, as necessary.
Keep unit free of debris. Clean up oil or fuel
spills.
ALWAYS block wheels and know all jack
stands are strong and secure and will hold
weight of unit during maintenance.
Release any pneumatic or hydraulic
pressure from components slowly.
NEVER attempt to make any adjustments to
unit while engine is running (except where
specifically recommended). Stop engine,
remove key or spark plug wire and wait for
all moving parts to stop before servicing or
cleaning.
Lower cutting deck unless a positive
mechanical lock is used.
Allow engine to cool before servicing.
Moving parts can cut or amputate fingers or
a hand. On multiblade mowers, rotation of
one blade will cause all blades to rotate.
Never weld or straighten mower blades.
Never make adjustments or repairs with the
engine running.
Mower blades are sharp. Wrap the blade or
wear gloves, and use extra caution when
servicing them.
ALWAYS keep body and hands away from
pin holes or nozzles which eject hydraulic
fluid under pressure.
Transporting Unit
Use extra care when loading or unloading
the machine into a trailer.
Secure unit chassis to transport vehicle.
Never secure from rods or linkages that
could be damaged.
Do not transport machine while engine is
running.
ALWAYS turn off power to attachment and
shut off fuel when transporting unit.
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 - 12
1. Unpack Unit – Remove shrink wrap and
packaging materials.
2. Remove Unit From Container – Place
bypass levers in neutral position (see
Moving the Unit with the Engine Off on
page 20). Push unit from container onto
a level surface. Put bypass levers in
drive position.
3. Tires – See Specifications on page 37.
4. Prepare Seat
a. Remove hairpin and clevis from
shipping position on left side of seat
and reinstall as shown below.
b. Secure adjustment dial to seat as
shown below. Use socket wrench to
hand tighten bolt until dial is difficult
to rotate, then loosen bolt slightly
until dial rotates freely.
IMPORTANT: DO NOT loosen bolt more than
one full turn.
5. Rollover Protection Structure (ROPS) –
Raise center bar (see Rollover
Protection Structure (ROPS) on page
17).
6. Battery – Remove battery from unit and
charge (see Battery on page 26).
Reinstall when fully charged.
7. Check Engine Crankcase – Check and
add oil if needed. See engine manual for
specifications.
8. Fill Engine Fuel Tank – Add clean fuel to
the fuel tank. DO NOT OVERFILL! See
Filling Fuel Tank on page 18.
IMPORTANT: Refer to engine manual for fuel
type.
9. Hardware – Check for loose hardware.
10. Check Safety Interlock System – Check
to see that the interlock system operates
correctly (see Safety Interlock System
on page 15).
ASSEMBLY
WARNING: AVOID INJURY. Read
and understand entire Safety
section before proceeding.
CAUTION: Avoid injury! Explosive
separation of tire and rim parts is
possible when they are serviced
incorrectly:
• Do not attempt to mount a tire
without the proper equipment
and experience to perform the
job.
• Do not inflate the tires above the
recommended pressure.
• Do not stand in front or over the
tire assembly when inflating. Use
a clip-on chuck and extension
hose long enough to allow you to
stand to one side.
Reinstall
hairpin and
clevis here.
Shipping
position for
hairpin and
clevis.
WARNING: FAILURE OF
INTERLOCK together with improper
operation can result in severe
personal injury.
1. Recliner Pin
2. Bearing
3. Seat Adjustment Dial
4. Washer
5. Bowed Washer
6. Flat Washer
7. 3/8-16 x 1 1/2" Hex Bolt
1
2
34
7
6
5

EN - 13
11. Lubrication – Lubricate all fittings per
maintenance label under seat and check
hydrostat oil level (see Maintenance
Schedule on page 21).
12. Remove discharge chute from transport
position and place in operating position.
13. Level Deck – Check unit to ensure deck
level set at factory has been maintained
(see Leveling the Mower Deck on
page 33).
14. Check function of all controls – Ensure
unit runs and performs properly.
WARNING: FAILURE OF
CONTROLS could result in death or
serious injury.
52" and 60" Decks48" Decks
Transport Position
Operating Position

EN - 14
1. Fuel Tank and Cap (2)
2. Steering Levers
3. Rollover Protection System (ROPS)
4. Hydraulic Oil Reservoir (Under Seat)
5. Ignition Switch
6. Hour Meter
7.
Throttle Lever
8. Choke Control (991119, 120, 121, 122,
123, 124, 127)
9. Power Take Off (PTO) Switch
10. Battery (Under Seat)
11. Fuel Control Lever
12. Mower Lift Pedal
13. Transport Lock
14. Height-of-Cut Adjuster
15. Parking Brake
16. Discharge Chute
17. Anti-scalp Wheel (2)
18. Transaxle Bypass Lever (2)
19. Oil Pressure Light
20. Malfunction Indicator Light
(991125, 991126)
21. Seat Weight Adjustment Dial
22. Seat Adjustment Lever
23. Seatback Adjustment Dial
24. Armrest Angle Adjustment Knob
(Under Armrest, 2)
25. Lumbar Support Adjustment Lever
CONTROLS AND FEATURES
1
2
3
9
11
12
13
18
58
7
19
Figure 3
2122
6
20
16 17
4, 10
15
25
8
23
24
14

EN - 15
CONTROLS AND FEATURES
See Figure 3 for Controls and Features
locations.
Safety Interlock System
Perform the following tests to ensure the
safety interlock system is working properly. If
the unit does not perform as stated, contact
your Gravely dealer for repairs.
NOTE: When the parking brake is engaged,
the steering levers are locked in neutral.
Parking Brake Interlock System
With the parking brake engaged, the steering
levers must be locked in neutral.
With the parking brake disengaged, the
engine must not start and the engine must
shut off if the operator leaves the seat.
Steering Levers
NOTE: The steering controls are
mechanically locked in neutral whenever the
parking brake is engaged.
NOTE: Aggressive turning can scuff or
damage lawns. ALWAYS keep both wheels
rotating when making sharp turns. DO NOT
make turns with inside wheel completely
stopped. To obtain minimum turning radius,
slowly reverse inside wheel while moving
outside wheel slowly forward.
Ignition Switch Operate the ignition switch
with the removable key.
The switch has three
positions: Off (1), On (2)
and Start (3). To start the
engine, turn the key to
Start, then release to On.
To stop the engine, turn
the key to Off.
OPERATION
WARNING: AVOID INJURY. Read
and understand entire Safety section
before proceeding.
WARNING: Safety interlock system
failure and improper operation of unit
can result in death or serious injury.
Test this system each time the unit is
operated. If this system does not
function as described, do not operate
until repairs are made.
Test Steering
Levers PTO Parking Brake Engine
STARTING INTERLOCK
1 Neutral Off Engaged Starts
2Forward,
Neutral,
Reverse
On Engaged or
Disengaged Does Not Start
3Forward,
Neutral,
Reverse
Onor
Off Disengaged Does Not Start
OPERATING INTERLOCK (ENGINE ON)
4* Forward,
Neutral,
Reverse
On Engaged or
Disengaged Shuts Off
5* Forward,
Neutral,
Reverse
Onor
Off Disengaged Shuts Off
* Operator lifts off seat.
Direction
of Travel Lever Position
Forward Push both levers
forward from
neutral position.
Reverse Pull both levers
backward from
neutral position.
Right Turn Push left lever
farther forward
than the right
lever.
Left Turn Push right lever
farther forward
than the left lever.
Stop Return both
levers to neutral
position.

EN - 16
Choke Control (991119, 120, 121, 122,
123, 124, 127) Push the choke lever
forward to start a cold
engine. Pull the choke
lever to the rear when the
engine gets warm.
Throttle Lever The throttle lever changes
the engine speed.
Move the throttle lever to
Fast (1) to increase engine
speed.
Move the lever to Slow (2)
to decrease engine speed.
Transaxle Bypass Lever
Put levers in neutral
position to move the unit
with the engine off.
Put levers in drive position
for normal operation.
Power Take Off (PTO) Switch
Power take off (PTO)
switch engages and
disengages the mower
blades.
Pull the switch to "On"
position to engage mower
blades.
Push the switch to "Off"
position to disengage
mower blades.
NOTE: The engine will not start unless the
steering control levers are in the neutral
position, the PTO switch is in the “Off”
position and parking brake is set.
Mower Lift Pedal
Mower lift pedal raises and lowers mower
deck for mowing or transport.
Transport:
Push mower liftpedal all the way forward until
lift lock engages.
Cutting Height:
Put cutting height adjustment pin in desired
hole. Push mower lift pedal forward and hold
it while pushing down on the lift lock. Slowly
lower mower lift pedal until deck lift contacts
cutting height adjustment pin.
Fuel Control Lever
Use this lever to control
fuel flow from left or right
fuel tank.
Move lever to appropriate
tank to operate engine.
Turn lever to "Off" when
storing or transporting the
unit.
Parking Brake Lever
1. Pull lever up to engage
parking brake.
2. Push lever down to
disengage parking brake.
OF1680
2
1
Drive
Neutral
OFF
ON
CONVERSION TABLE
Inch Centimeter Inch Centimeter
1/4 .635 2 5.08
1/21.2737.62
3/4 1.905 4 10.16
12.54512.7

EN - 17
SEAT ADJUSTMENTS
Setting Operator Weight
Turn dial to setting that matches the
approximate weight of the operator.
Setting Seat Position
1. Pull seat adjustment lever outward and
slide seat forward or backward to desired
position.
2. Release lever and slide seat slightly
forward or backward to lock seat position.
Setting Seatback Angle
Turn adjustment knob counterclockwise to
move seatback forward. Turn knob clockwise
to move seatback rearward.
Setting Armrest Angle
Turn height adjustment knob
counterclockwise to raise the front of the
armrest or clockwise to lower the front of
armrest.
Setting Lumbar Support
Lift lever to increase lumbar support. Lower
lever to decrease support.
HOUR / MAINTENANCE METER
Hour Meter-only Models
Hour meter measures engine runtime and
cannot be reset.
Maintenance Models
(Figure 4)
When the key is in the on position, the Timer
mode displays. Press the Mode button to
toggle between different modes.
Timer: Measures engine runtime until reset.
To reset the timer, press the Mode button to
select TMR1 mode and then hold Mode
button for 3 seconds.
IMPORTANT: Turn ignition key to the off
position when unit is not in use. Some meters
may count hours when the key is in the on
position, even if the engine is off. This results
in inaccurate maintenance intervals.
Service Alerts: Counts down hours until
service is needed and displays "Now" when
service is due. Service time is measured for:
• Engine oil and filter changes (CHG OIL)
• Hydraulic oil and filter changes (CHG H
OIL)
• Air filter service (SVC AIRFILTER)
The service intervals preset into the hour
meter are:
• Hydraulic oil and filter: First 75 hours and
every 400 hours thereafter
• Engine oil and filter: First 25 hours and
every 100 hours thereafter
• Air filter: Every 100 hours
NOTICE: The preset engine oil services
intervals are normal recommended intervals.
Specific engine manufacturer’s
recommendations may vary.
To clear a service message, press the Mode
button to select Service Alert mode and then
hold the Mode button for 3 seconds.
ROLLOVER PROTECTION
STRUCTURE (ROPS)
Frequently inspect ROPS and seat belt for
damage or loose hardware.
Use extreme care when working close to
fences, ditches, or on hills.
Check overhead clearance carefully before
driving under any objects.
ALWAYS wear seat belt while operating the
unit with the ROPS in the upright position.
Do not wear a seat belt while operating the
unit with the center bar in the lowered
position.
IMPORTANT: Do not weld, cut, drill or modify
ROPS in any manner unless instructed by the
manufacturer.
WARNING: Make all seat
adjustments with unit stationary,
parking brake on and engine shut off.
Mode Button
Figure 4

EN - 18
Lower Center Bar
(Figure 5)
1. Loosen but do not remove the round
knobs on both sides.
2. Remove the two hair pins and then
remove the ROPS lock pins from the
hinge plate.
3. Lower the center bar into down position.
4. Install the ROPS lock pins in the hinge
plate and secure with the hair pins.
Raise Center Bar
(Figure 5)
1. Remove the two hair pins and then
remove the ROPS lock pins from the
hinge plate.
2. Raise the center bar into up position.
3. Install the ROPS lock pins in the hinge
plate and secure with the hair pins.
NOTE: Return the center bar to the raised
position when clear of obstacles.
4. Tighten the round knobs to prevent
vibration rattle.
FILLING FUEL TANK
Add fuel to fuel tank as needed. See your
engine manual for correct type and grade of
fuel.
To add fuel to the fuel tank:
1. Clean fuel caps and surrounding area to
prevent dust, dirt, and debris from
entering fuel tanks.
2. Remove fuel caps.
IMPORTANT: Refer to engine manual for
correct type and grade of fuel.
3. Fill fuel tank to the bottom of filler neck.
See Specifications on page 37 for fuel
tank capacity.
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%.
IMPORTANT: DO NOT OVERFILL! This
equipment and/or its engine may include
evaporative emissions control system
components, required to meet EPA and/or
CARB regulations, that will only function
properly when the fuel tank has been filled to
the recommended level. Overfilling may
cause permanent damage to evaporative
emissions control system components. Filling
to the recommended level ensures a vapor
gap required to allow for fuel expansion. Pay
close attention while filling the fuel tank to
ensure that the recommended fuel level
inside the tank is not exceeded. Use a
portable gasoline container with an
appropriately sized dispensing spout when
filling the tank. Do not use a funnel or other
device that obstructs the view of the tank
filling process.
4. Replace fuel cap and tighten.
5. ALWAYS clean up spilled fuel.
WARNING: Lower the center bar
only when necessary to drive under
an object. There is no rollover
protection with the center bar in the
down position.
Lowered Position
Figure 5
Raised Position
Lock
Pin
Hair
Pin
WARNING: AVOID INJURY. Read
and understand entire Safety section
before proceeding.