Gravely Lawn Mower 310 990018 990020 User Manual

Promaster 310  
Owner/Operator Manual  
Models  
990018  
25 HP Kohler  
990020  
23 HP Kawasaki  
ENGLISH  
FRANÇAIS  
ESPAÑOL  
08495100A 1/02  
Supercedes 08495100  
Printed in USA  
 
TABLE OF CONTENTS  
Controls and Features . . . . . . . . . . . . . . . . . . . . . . . . 2  
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Service and Adjustments . . . . . . . . . . . . . . . . . . . . . 13  
INTRODUCTION  
affect the performance, durability, or safety of this unit.  
Gravely disclaims liability for any claims or damages,  
whether warranty, property damage, personal injury or  
death arising out of the use of unauthorized replacement  
parts.  
THE MANUAL  
Before operation of unit, carefully and completely read  
your manuals. The contents will provide you with an  
understanding of safety instructions and controls during  
normal operation and maintenance.  
DISCLAIMER  
All reference to left, right, front, or rear are given from  
operator sitting in operation position and facing the  
direction of forward travel.  
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  
specications contained in this manual were in effect at  
printing. Equipment described within this manual may be  
optional. Some illustrations may not be applicable to your  
unit.  
MODEL AND SERIAL NUMBERS  
When ordering replacement parts or  
Transfer  
model & serial  
number label  
from product  
registration  
here.  
making service inquiries, know the  
Model and Serial numbers of your unit  
and engine.  
DELIVERY  
Customer Note: If you have purchased this product  
without complete assembly and instruction by your  
retailer, it is your responsibility to:  
Numbers are located on the product  
registration form in the unit literature  
package. They are printed on a serial  
number label, located on the frame of  
your unit.  
1. Read and understand all assembly instructions in  
this manual. If you do not understand or have  
difculty following the instructions, contact your  
nearest Gravely Dealer for assistance. Make sure  
all assembly has been properly completed and  
safety interlock system works properly.  
Serial  
Number  
Label  
NOTE: To locate your nearest Gravely Dealer, call  
internet.  
WARNING: Improper assembly or adjustments  
can cause serious injury.  
OF3380  
Figure 2  
2. Understand all Safety Precautions provided in the  
manuals.  
Record Unit Model and Serial numbers here.  
3. Review control functions and operation of the unit.  
Do not operate unit unless all controls function as  
described in this manual.  
Record Engine Model and Serial numbers here.  
4. Review recommended lubrication, maintenance  
and adjustments.  
5. Fill out Original Purchaser Registration Card and  
return the card to Gravely Company.  
UNAUTHORIZED REPLACEMENT PARTS  
Use only Gravely replacement parts. The replacement of  
any part on this vehicle with anything other than an  
Gravely authorized replacement part may adversely  
© Copyright 2002 Ariens Company  
GB - 3  
 
 
SAFETY  
SAFETY ALERTS  
NOTATIONS  
Look for these symbols to point out  
NOTE: General reference information for proper  
important safety precautions. They mean:  
operation and maintenance practices.  
IMPORTANT: Specic procedures or information  
required to prevent damage to unit or attachment.  
Attention!  
Personal Safety Is Involved!  
Become Alert!  
PRACTICES AND LAWS  
Practice usual and customary safe working precautions,  
for the benet of yourself and others. Understand and  
follow all safety messages. Be alert to unsafe conditions  
and the possibility of minor, moderate, or serious injury or  
death. Learn applicable rules and laws in your area.  
Always follow the practices set forth in this manual.  
Obey The Message!  
The safety alert symbols above and signal words below  
are used on decals and in this manual.  
Read and understand all safety messages.  
DANGER: IMMINENTLY HAZARDOUS  
SITUATION! If not avoided, WILL RESULT in  
death or serious injury.  
REQUIRED OPERATOR TRAINING  
Original purchaser of this unit was instructed by the seller  
on safe and proper operation by the seller. If unit is to be  
used by someone other than original purchaser; loaned,  
rented or sold, ALWAYS provide this manual and any  
needed safety training before operation.  
WARNING: POTENTIALLY HAZARDOUS  
SITUATION! If not avoided, COULD RESULT in  
death or serious injury.  
SAFETY DECALS AND LOCATIONS  
ALWAYS replace missing or damaged Safety Decals.  
Refer to gure below for Safety Decal locations.  
CAUTION: POTENTIALLY HAZARDOUS  
SITUATION! If not avoided, MAY RESULT in  
minor or moderate injury. It may also be used to  
alert against unsafe practices.  
GB - 4  
 
 
1 & 2. DANGER  
Read the operators manual.  
ASSEMBLY SAFETY RULES  
Read, understand, and follow all safety practices in  
Owner/Operator Manual before beginning assembly.  
Failure to follow instructions could result in personal  
injury and/or damage to unit.  
OL1801  
ALWAYS remove key and/or wire from spark plug before  
assembly. Unintentional engine start up can cause death  
or serious injury.  
Keep children and others away from unit while  
operating.  
OL4140  
OPERATIONAL SAFETY RULES  
Walk Around Inspection  
Never direct discharge toward other people.  
Thrown objects can cause injury.  
Complete a walk around inspection of unit and work area  
to understand:  
OL0910  
Work area Your unit All safety decals  
Look down and behind before and while  
backing.  
Work Area  
ALWAYS check overhead and side clearances carefully  
before operation. ALWAYS be aware of trafc when  
operating along streets or curbs.  
Keep children and people away. Keep children out of  
work area and under watchful care of a responsible adult.  
OL4780  
OL4790  
Keep children out of work area and under  
watchful care of a responsible adult.  
Keep area of operation clear of all toys, pets, and debris.  
Thrown objects can cause injury.  
Never carry children.  
Check for weak spots on dock, ramps or oors. Avoid  
uneven work areas and rough terrain. Stay alert for  
hidden hazards.  
OL4800  
Avoid uneven and rough terrain. 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.  
Go up and down slopes, not across.  
MAX  
10°  
10°  
OL4770  
Personal Safety  
Disengage PTO before tilting deck upward.  
Data indicates that operators, age 60 and above, are  
involved in a larger 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.  
OL4820  
Never allow operation by untrained  
persons.  
Only trained adults may operate unit.  
Training includes actual operation.  
If machine stops going uphill, stop blade and back  
down slowly.  
NEVER allow children to operate or play on or near unit.  
Be alert and shut off unit if children enter area.  
NEVER operate unit after or during the use of  
medication, drugs or alcohol. Safe operation requires  
your complete and unimpaired attention at all times.  
DO NOT wear loose clothing or jewelry and tie back hair  
that may get caught in rotating parts.  
Wear adequate outer garments.  
Avoid sudden turns.  
Keep safety devices (guards, shields, switches,  
etc.) in place and working.  
Check interlock system per manual before use.  
Understand location and function of all controls.  
3. HOT SURFACES!  
DO NOT touch parts which are hot from  
operation. ALWAYS allow parts to cool.  
NEVER wear open sandals or canvas shoes during  
operation. Wear adequate safety gear, protective gloves  
and footwear.  
OD0061  
Wear proper footwear to improve footing on slippery  
surfaces.  
Always wear safety goggles or safety glasses with side  
shields when operating mower.  
4. DANGER!  
PINCH POINT  
Moving parts can cut or amputate ngers or a hand.  
Wrap blade(s) or wear gloves to service.  
OL4830  
IMPORTANT: On multi-blade mowers, rotation of one  
blade will cause all blades to rotate.  
GB - 5  
 
NEVER place your hands or any part of your body or  
clothing inside or near any moving part while unit is  
running.  
If equipment vibrates abnormally, stop engine at once,  
wait for moving parts to stop and remove wire from spark  
plug. Repair any damage before restarting unit.  
Take all possible precautions when leaving unit  
unattended. Shut off engine. Remove wire from spark  
plug and secure it away from spark plug.  
ALWAYS keep hands and feet away from all rotating  
parts during operation. Rotating parts can cut off body  
parts.  
ALWAYS keep body and hands away from pin holes or  
ALWAYS remove key to prevent unauthorized use.  
nozzles which eject hydraulic uid under pressure.  
Know the weight of loads. Limit loads to those you can  
safely control and the unit can safely handle.  
Disengage PTO when attachment is not in use. ALWAYS  
turn off power to attachment when travelling, crossing  
driveways, etc.  
DO NOT touch parts which are hot. Allow parts to cool.  
ALWAYS keep hands and feet away from all pinch points.  
Fumes from the engine exhaust can cause death or  
serious injury. DO NOT run engine in an enclosed area.  
Always provide good ventilation.  
Operation  
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  
Keep safety devices or guards in place and functioning  
properly. NEVER modify or remove safety devices.  
Ensure Safety Interlock System is functioning properly.  
DO NOT operate unit if safety interlock is damaged or  
disabled.  
Before starting engine: disengage PTO, place direction  
control pedal in neutral, lower attachment and set parking  
brake.  
Dust, smoke, fog, etc. can reduce vision and cause an  
accident. Mow only in daylight or good articial light.  
Avoid slippery surfaces. Always be sure of your footing.  
DO NOT mow on wet grass. Reduced traction could  
cause sliding.  
Watch for trafc when operating near or crossing  
roadways.  
Never carry passengers.  
DO NOT try to stabilize the machine by putting your foot  
on the ground.  
Never direct discharge towards persons or property that  
may be injured or damaged by thrown objects. Use  
extreme caution on gravel surfaces. Stay alert for hidden  
hazards or trafc.  
Always stand clear of the discharge area.  
ALWAYS disengage PTO, stop unit and engine, remove  
key, engage parking brake and allow moving parts to stop  
before leaving operators position.  
Never engage PTO while raising attachment or when  
attachment is in raised position.  
DO NOT operate at too fast a rate. DO NOT change  
engine governor settings or over-speed engine. Slow  
down before turning.  
DO NOT operate in reverse unless absolutely necessary.  
ALWAYS look down and behind before and while  
backing.  
GB - 6  
Replace fuel cap securely and clean up spilled fuel.  
MAINTENANCE AND SERVICE SAFETY  
RULES  
ALWAYS block wheels and know all jack stands are  
strong and secure and will hold weight of unit during  
maintenance.  
Never ll 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 lling.  
When practical, remove gas-powered equipment from  
the truck or trailer and refuel it on the ground. If this is not  
possible, then refuel such equipment on a trailer with a  
portable container, rather than from a gasoline dispenser  
nozzle.  
Keep nuts and bolts tight, especially blade attachment  
bolts, and keep equipment in good condition.  
NEVER attempt to make any adjustments to unit while  
engine is running. Stop engine, remove spark plug wire  
and wait for all moving parts to stop before servicing  
(except where specically recommended).  
Keep the nozzle in contact with the rim of the fuel tank or  
container opening at all times until fueling is complete.  
Do not use a nozzle lock-open device.  
Check parking brake operation frequently. Adjust and  
service as required.  
If fuel is spilled on clothing, change clothing immediately.  
ALWAYS maintain unit in safe operating condition.  
Damaged or worn out mufer can cause re or explosion.  
NO smoking, NO sparks, NO ames. ALWAYS allow  
engine to cool before servicing.  
BATTERY  
Avoid Electric Shock. Objects contacting both battery  
terminals at the same time may result in injury and unit  
damage. DO NOT reverse battery connections.  
Maintain or replace safety and instructions labels, as  
necessary.  
Explosive Gases from battery can cause death or serious  
injury. Poisonous battery uid contains sulfuric acid and  
its contact with skin, eyes or clothing can cause severe  
chemical burns.  
STORAGE SAFETY RULES  
NEVER store unit with fuel in fuel tank, inside a building  
where any ignition sources are present.  
Allow engine to cool completely before storing in closed  
area or covering unit.  
No ames, No sparks, No smoking near battery.  
ALWAYS wear safety glasses and protective gear near  
battery.  
DO NOT TIP battery beyond a 45˚ angle in any direction.  
For extended storage, clean unit thoroughly. See engine  
manual for proper storage.  
ALWAYS keep batteries out of reach of children.  
Lower cutting deck unless a positive mechanical lock is  
used.  
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.  
ACCESSORY AND ATTACHMENT SAFETY  
RULES  
Use only attachments or accessories designed for your  
unit.  
Battery Electrolyte First Aid  
Follow First Aid directions for contact with battery uid.  
External Contact: Flush with water.  
Check attachment components frequently. If worn or  
damaged, replace with manufacturers recommended  
parts.  
Eyes: Flush with water for at least 15 minutes and  
get medical attention immediately!  
Internal Contact: Drink large quantities of water.  
Follow with Milk of Magnesia, beaten egg or  
vegetable oil. Get medical attention immediately!  
In case of internal contact, DO NOT induce vomiting!  
GB - 7  
 
ASSEMBLY  
Fill Engine Crankcase  
WARNING: AVOID INJURY. Read and  
understand Assembly, Fuel and Battery Safety  
Rules before proceeding.  
The unit is shipped without oil in engine crankcase. Refer  
to engine manual for proper oil type and crankcase  
capacity.  
Check Hydraulic Oil  
See Maintenance.  
Tools required:  
socket wrench, 15/16"  
Fill Engine Fuel Tank  
tire gauge  
Unpack Unit  
Remove unit and all other components from the shipping  
container.  
Charge Battery  
See instructions for battery removal and charging in  
Install Handlebar  
Install Deck  
1. Remove nut securing handlebar to shaft.  
See deck Owner/Operator Manual.  
2. Remove handlebar from shaft.  
Check Safety Interlock System  
See Maintenance.  
3. Place handlebar on shaft so handle grips are up  
and angled toward front of unit.  
4. Replace nut securing handlebar to shaft.  
WARNING: Failure of safety interlock and  
improper operation could result in death or  
serious injury.  
Prepare Seat  
Remove and discard hair pin and clevis pin from back of  
seat.  
Check Function of All Controls  
Ensure unit runs and performs properly. Refer to  
Operation.  
Check Tire Pressure  
Check tire pressure and adjust. Adjust front tires to 12-15  
PSI (82.8 - 103.4 kPa). Adjust rear tires to 20-25 PSI  
(137.9 - 172.4 kPa).  
WARNING: Failure of controls could result in  
death or serious injury.  
OPERATION  
Parking Brake Interlock System  
WARNING: AVOID INJURY. Read and  
understand Operational, Fuel and Battery  
Safety Rules before proceeding.  
Moving direction control pedal with parking brake  
engaged will shut off engine.  
Ignition Switch  
The ignition switch is operated by a  
removable key.  
1
CONTROLS AND FEATURES  
See Figure on page 2 for all Controls and Features  
locations.  
2
To start:  
3
1. Insert the key.  
Safety Interlock System  
PTO must not engage unless operator is sitting in seat.  
2. Turn the switch clockwise from the OFF  
(1) position to the START (3) position.  
The key will spring back to the RUN (2) position.  
OF1210  
Engine must not start unless PTO is disengaged and  
direction control pedal is in neutral position.  
To stop the engine, turn key to the OFF (1) position.  
CAUTION: 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.  
GB - 8  
 
   
Throttle Lever  
Oil Pressure Warning Light  
Move lever to FAST (1) position to increase  
engine speed. Move lever to SLOW (2)  
position to decrease engine speed.  
If light turns on during operation:  
1
1. Stop unit and engine.  
2. Wait ve minutes.  
2
3. Check engine oil level and ll if  
OG0601  
necessary.  
OE0340  
4. Check for external damage to engine.  
Choke  
To test oil pressure warning light, turn ignition key to the  
run position. Light should turn on.  
Pull choke control out to start a cold engine.  
Push control in as engine warms up.  
Parking Brake Lever  
OE0590  
Pull lever backward to engaged (2)  
position to activate parking brake.  
Handlebar  
Push lever forward in disengaged (1)  
position to deactivate parking brake.  
1
2
Turn handlebar clockwise to steer right. Turn handlebar  
counterclockwise to steer left.  
NOTE: Unit spins in a zero turn radius when handlebar is  
turned to maximum position in either direction.  
OF1332  
PTO Switch  
Speed and Direction Control Pedal  
The power take-off switch is used to engage  
and disengage the attachment.  
Press pedal forward (1) to move tractor  
forward.  
1
1
2
Lift switch to engage (1) attachment.  
Press pedal backward (2) to move the  
tractor backward.  
Push switch down to disengage (2)  
attachment.  
Remove foot from pedal to return unit  
to neutral.  
OE0261  
2
Hourmeter  
OF3390  
Records total time key is in RUN position.  
Deck Lift Lever  
Seat Adjustment Lever  
Pull lever out and slide seat to desired position. Release  
lever to lock seat in position.  
Pull lever backwards to LIFT (3)  
position to lift mower.  
1
Place lever in HOLD (2) position  
to hold mower in current position.  
Seat Suspension Adjustment Knob  
To make seat more rm turn knob clockwise. To make  
seat less rm turn knob counterclockwise.  
Push lever forward to FLOAT (1)  
position for mowing.  
2
3
Transmission Bypass Valve  
IMPORTANT: Disengage PTO  
before pulling lever back to LIFT.  
The transmission bypass valve disengages the  
transmission to allow manual movement of unit. See  
Cut Height Lever  
To raise attachment, move lever  
OF3310  
backward.  
FILLING FUEL TANK  
To lower attachment, move lever  
forward.  
WARNING: AVOID INJURY. Read and  
understand Fuel Safety Rules before  
proceeding.  
To hold attachment in place, release  
lever.  
To add fuel to fuel tank:  
1. Place unit in an open or well-ventilated area.  
2. Stop engine and allow to cool.  
OL4810  
3. Clean fuel cap and surrounding area to prevent dirt  
from entering fuel tank.  
4. Remove fuel cap.  
IMPORTANT: See engine manual for correct type and  
grade of fuel.  
GB - 9  
 
 
5. Fill fuel tank to within 1/2" (1.3 cm) below bottom of  
MOVING UNIT MANUALLY  
IMPORTANT: Never tow unit.  
1. Stop engine.  
ller neck.  
NOTE: Fuel tank capacity is 7.5 gal. (28.4L).  
6. Replace fuel cap and tighten.  
7. Clean up any spilled fuel.  
2. Turn transmission bypass valve counterclockwise  
1/4 turn.  
3. Disengage parking brake.  
TO STOP IN AN EMERGENCY  
Turn ignition key to OFF.  
4. Push unit to desired location.  
5. Engage parking brake.  
STARTING THE ENGINE  
6. Turn transmission bypass valve clockwise 1/4 turn.  
1. Check each item in Before Each Use in the  
Maintenance Schedule.  
To allow  
manual  
movement:  
2. Disengage PTO.  
3. Engage parking brake.  
4. Apply choke to a cold engine.  
5. Place throttle lever to FAST when starting a warm  
engine. Place throttle lever in a middle position  
when starting a cold engine.  
To engage  
transmission:  
6. Turn key to START position.  
IMPORTANT: DO NOT operate starter motor more than  
15 seconds per minute, as overheating and damage can  
occur. If engine will not start, refer to Troubleshooting or  
Engine Manual.  
7. When engine starts, release to RUN position.  
8. Disengage parking brake.  
Figure 4  
OF3370  
OPERATING UNIT  
To mow:  
1. Take foot off direction control pedal to place unit in  
neutral.  
2. Place throttle lever in middle position.  
3. Engage PTO.  
4. Set throttle to FAST.  
5. Depress direction control pedal for desired mowing  
speed.  
6. Disengage PTO when nished mowing.  
STOPPING  
1. Take foot off direction control pedal to place unit in  
neutral.  
2. Move throttle lever to SLOW.  
3. Turn ignition key to OFF.  
PARKING  
1. Stop as instructed above.  
2. Engage parking brake.  
3. Remove ignition key.  
GB - 10  
 
 
MAINTENANCE  
Gravely Dealers will provide any service or adjustments  
CHECKING SAFETY INTERLOCK SYSTEM  
Test the safety interlock system before each use. If the  
system does not function properly, do not operate the unit  
until repairs are made.  
which may be required to keep your unit operating at  
peak efciency. Should engine service be required,  
contact an Gravely dealer or an authorized engine  
manufacturer's service center.  
CAUTION: 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.  
WARNING: AVOID INJURY. Read and  
understand Maintenance and Service and  
Battery Safety Rules in Safety section before  
attempting any maintenance.  
The PTO must not engage unless operator is sitting on  
seat. To test:  
MAINTENANCE SCHEDULE  
Intervals  
Service Performed  
1. Start engine.  
Before each use:  
Check Safety Interlock System  
Check Fasteners  
2. Stand up off of seat.  
3. Lift PTO switch. PTO must not engage.  
Check Parking Brake Interlock  
Check Parking Brake  
Check Tires  
Engine must not start unless PTO is disengaged and the  
speed control pedal is in neutral. To test:  
1. With engine off, engage PTO.  
Check Hydraulic Oil Level  
Clean Unit  
2. Turn ignition switch to Start. Engine must not crank.  
3. Disengage PTO.  
Check Engine Oil Level  
4. Press speed control pedal forward.  
5. Turn ignition switch to Start. Engine must not crank.  
1
Check Air Cleaner  
1
Check Air Intake  
Every 25 hours:  
Check and Clean Battery  
Clean Hydraulic Pump  
Lubricate Unit  
CHECK FASTENERS  
Be certain that all hardware is tightened to the proper  
torque. Pay special attention to mower blades, guards  
and safety shields.  
1
Service Precleaner  
1
Check Engine Oil Cooler  
CHECK PARKING BRAKE INTERLOCK  
Ensure unit shuts off when direction control pedal is  
depressed with the parking brake engaged.  
Clean Hydraulic Oil Cooler  
After rst 50 hours: Replace Hydraulic Oil Filter  
Every 50 hours:  
Every 100 hours:  
Inspect Spark Arrestor  
Check Fasteners  
Check Belts  
CHECK PARKING BRAKE  
With parking brake engaged, push unit. If unit rolls, adjust  
parking brake. See Service and Adjustments.  
1
Replace Air Cleaner  
CHECK TIRES  
Change Oil  
1
Adjust front tires to 12 - 15 PSI (82.8 - 103.4 kPa). Adjust  
rear tires to 20 - 25 PSI (137.9 - 172.4 kPa).  
Clean Cooling Areas  
Every 200 hours:  
Replace Hydraulic Oil Filter  
Change Engine Oil Filter  
Check Spark Plugs  
Check Belts  
CHECK AND CLEAN BATTERY  
WARNING: AVOID INJURY. Read and  
understand Battery Safety Rules in Safety  
section before proceeding.  
Every season:  
Before storage:  
Check Fasteners  
Check and Clean Battery  
Clean Hydraulic Pump  
Lubricate Unit  
Clean Battery  
Keep battery and its terminals clean. Inspect every 25  
operating hours or monthly for best performance.  
Clean Unit  
1
Change more often in dirty, dusty conditions.  
1. Remove battery cover.  
GB - 11  
 
 
2. Disconnect cables from battery (negative, then  
positive).  
REPLACING HYDRAULIC OIL FILTER  
Replace hydraulic oil lter after the rst 50 hours of  
operation and every 200 hours thereafter.  
3. Clean terminals and battery cable ends with wire  
brush.  
1. Clean around dipstick cap and dipstick. Remove  
dipstick.  
4. Coat terminals with grease or petroleum jelly.  
5. Reconnect cables to battery (positive, then  
negative).  
2. Place container under oil lter to catch dripping oil.  
3. Remove oil lter.  
6. Replace battery cover.  
4. Install new oil lter.  
5. Check hydraulic oil level and add if necessary.  
6. Clean up any oil spills.  
Electrolyte Level  
Every 25 hours of operation or each week check  
electrolyte level of each cell by removing caps one at a  
time. The electrolyte level should be at level indicator.  
Use distilled water to ll each cell if needed.  
IMPORTANT: See Service and Adjustments for changing  
hydraulic oil.  
CHECK BELTS  
CLEAN HYDRAULIC PUMP  
Check belts every 100 hours and every season. Replace  
worn or deteriorated belts. Replace belts to  
accommodate belt stretch and wear in the traction drive  
or mower drive. Refer to Service and Adjustments for  
procedures.  
Clean hydraulic pump before each use and before  
storage. Keep pump surface free from buildup of dirt and  
debris.  
LUBRICATE UNIT  
Every 25 hours and before storage:  
CLEAN UNIT  
Clean unit before each use and before storage.  
Grease steering caster spindle and handlebars.  
Clean engine, battery, seat, deck, etc. of all dirt and  
debris with a brush or cloth. Do not use solvents,  
harsh cleaners or abrasives.  
Keep nished surfaces and wheels free of all  
gasoline, oil, etc.  
Protect painted surfaces with automotive type wax.  
Lightly coat unpainted surfaces with spray lubricant  
and wipe off excess with soft cloth.  
CHECK ENGINE OIL LEVEL  
Check engine oil level before each use.  
1. Remove oil ll cap/dipstick.  
2. Check level on oil dipstick.  
3. Add more oil if needed.  
4. Tighten ll cap securely.  
CHECK HYDRAULIC OIL LEVEL  
Check hydraulic oil level before each use.  
See engine manual for detailed instructions.  
IMPORTANT: Maintain proper oil level to prevent engine  
damage.  
IMPORTANT: Hydraulic tank MUST be lled before  
starting engine.  
CHECK AIR CLEANER  
1. Stop engine.  
Check air cleaner before each use. See engine manual  
for detailed instructions.  
2. Place deck lift lever in FLOAT position.  
3. Remove any dirt that may be around the cap on the  
tank.  
CHECK AIR INTAKE  
Check air intake before each use. See engine manual for  
detailed instructions.  
4. Remove cap and dipstick.  
5. Check hydraulic oil level mark on dipstick.  
6. Add hydraulic oil through the dipstick tube as  
SERVICE PRECLEANER  
needed. Do not overll.  
Service precleaner every 25 hours. Service more often  
when operating in dirty or dusty conditions. See engine  
manual for detailed instructions.  
IMPORTANT: Fluid should be changed only if it is  
contaminated.  
GB - 12  
CHECK ENGINE OIL COOLER  
CHANGE OIL  
Check engine oil cooler every 25 hours. Check more  
often when operating in dirty or dusty conditions. See  
engine manual for detailed instructions.  
Change engine oil every 100 hours. See engine manual  
for detailed instructions.  
CLEAN COOLING AREAS  
Remove shrouds and clean cooling areas every 100  
hours. Clean more often in dirty or dusty conditions. See  
engine manual for detailed instructions.  
CLEAN HYDRAULIC OIL COOLER  
Blow out hydraulic oil cooler with compressed air every  
25 hours of operation to remove dust and debris.  
CHANGE ENGINE OIL FILTER  
INSPECT MUFFLER/SPARK ARRESTOR  
Change oil lter every 200 hours. See engine manual for  
detailed instructions.  
Inspect mufer and spark arrestor every 50 hours.  
Replace mufer if corroded.  
CHECK SPARK PLUGS  
REPLACE AIR CLEANER  
Check condition of spark plugs and spark plug gap every  
200 hours. See engine manual for detailed instructions.  
Replace air cleaner every 100 hours. Replace more  
often when operating in dirty or dusty conditions. See  
engine manual for detailed instructions.  
SERVICE AND ADJUSTMENTS  
REPLACING THE DRIVE BELT  
1. Stop engine and remove key.  
2. Disengage PTO.  
ADJUSTING NEUTRAL  
Adjust neutral on hydraulic pump if tractor "creeps" when  
direction control pedal is not depressed.  
3. Remove remove mower belt from electric clutch  
WARNING: The following adjustment requires  
engine running and guards removed. Use  
extreme caution when performing this  
adjustment.  
(see mower owners manual).  
4. Remove idler spring and drive belt.  
5. Place the new belt on the pump sheave, idler pulley  
and engine sheave.  
1. Shut off engine and remove key.  
6. Reinstall idler spring.  
2. Jack or hoist one of the drive wheels off the ground.  
3. Start the engine. Do not engage parking brake.  
4. Loosen adjusting bolt.  
7. Reinstall mower belt. Adjust mower belt tension per  
mower Owner/Operator Manual.  
5. To correct forward creep, turn neutral bracket  
clockwise.  
6
1
To correct backward creep, turn neutral bracket  
counterclockwise.  
3
6. Retighten the adjusting bolt.  
5
7. Ensure neutral switch sits in notch on plate. If it  
does not, loosen plate bolt and rotate plate until  
neutral switch sits in notch.  
NOTE: This adjustment will affect the direction control  
adjust angle.  
4
2
1. Electric Clutch  
2. Idler Spring  
3. Drive Belt  
4. Pump Sheave  
5. Idler Pulley  
6. Engine Sheave  
Figure 6  
OF3330  
GB - 13  
 
 
ADJUSTING PARKING BRAKE  
To test parking brake:  
4
1
1. Engage parking brake, shut off engine and remove  
key.  
2. Disengage transmission. See Moving Unit Manually  
in Operation.  
3
5
3. Push unit. If unit can be moved, adjust parking  
brake.  
To adjust parking brake:  
1. Loosen jam nuts.  
2
1. Adjusting Bolt  
2. Plate Bolt  
3. Notch  
4. Neutral Switch  
5. Neutral Bracket  
OF3350  
Figure 7  
ADJUSTING DIRECTION CONTROL PEDAL  
2. Tighten adjustment nuts  
to eliminate slack in  
cables.  
1. Remove jam nut from stop bolt and remove stop  
bolt from frame.  
1
2
3
4
3. Tighten jam nuts against  
cable bracket.  
5
1. Control Pedal  
2. Stop Bolt  
4. Jam Nut  
5. Rod End  
3. Adjustment Nut  
Figure 9  
OF3341  
Figure 8  
OF3360  
2. Remove bolt and nut connecting rod end to  
direction control pedal.  
3. Turn rod end farther onto rod to angle pedal back.  
Turn rod end farther off of rod to angle pedal  
forward.  
4. Check that pedal is in a comfortable position. Adjust  
again if necessary.  
5. Replace bolt and nut removed in step 2.  
6. Reinstall stop bolt and turn adjustment nut until  
pedal hits bolt when fully depressed forward.  
7. Reinstall jam nut on stop bolt and tighten.  
GB - 14  
 
   
11. Reinstall battery into unit and connect positive (+)  
STEERING BELT ADJUSTMENT  
cable to battery rst, then negative (-) cable.  
1. Loosen idler nut.  
12. Replace battery cover.  
2. Tighten adjustment screw. Torque to 23 - 27 in. lbs.  
(2.6 - 3 Nm).  
CHANGING HYDRAULIC OIL  
3. Tighten idler nut.  
WARNING: HYDRAULIC FLUID UNDER  
PRESSURE can penetrate skin and cause  
severe burns that can result in death or serious  
injury. ALWAYS keep body and hands away  
from pin holes or nozzles which eject hydraulic  
uid under pressure. ALWAYS use paper or  
cardboard and not hands to search leaks. Know  
that all hydraulic uid connections are tight and  
all hydraulic hoses and lines are in good  
condition BEFORE applying pressure to the  
system. Foreign uid injected into the skin must  
be surgically removed within a few hours by a  
doctor familiar with this form of injury or  
gangrene may result.  
Idler Nut  
Adjustment  
Screw  
Capacity: 5 qt. (4.73 L)  
Figure 10  
OF3401  
BATTERY  
WARNING: AVOID INJURY. Read and  
understand Battery Safety Rules in Safety  
section before proceeding.  
Charging Battery  
ALWAYS follow information provided on battery by  
battery manufacturer.  
1. Stop engine and remove key.  
2. Remove battery cover.  
3. Disconnect negative (-) cable from battery rst, then  
positive (+) cable.  
4. Loosen strap and remove battery.  
5. Place battery on bench in well ventilated area  
where electrolyte spill will not cause damage.  
1. Park unit on a at level surface, ensure the engine  
is shut OFF, and the parking brake is set.  
6. Initial Battery Setup - Remove caps and ll each  
cell to level indicated with electrolyte at 1.265 .05  
specic gravity and 80˚F (27˚C). Let battery stand  
for thirty minutes. Check electrolyte level and add  
more if necessary.  
2. Place a suitable container under inlet hose.  
3. Remove dipstick.  
4. Remove inlet hose from lter housing.  
5. Allow hydraulic oil to completely drain.  
6. Install inlet hose on lter housing.  
7. Connect positive (+) lead of charger to positive (+)  
terminal, and negative (-) lead to negative (-)  
terminal.  
7. Add 15W-50 synthetic oil as needed to hydraulic  
reservoir. Do not overll.  
8. Charge the battery at two and a half amps for ten  
hours or until all cells are gassing freely and the  
specic gravity is constant over three 30 minute  
intervals.  
IMPORTANT: Ensure hydraulic oil is at proper level  
before starting engine.  
8. Check hydraulic oil level.  
9. Immediately after charging, check electrolyte level.  
If low, add distilled water to bring cell up to required  
level.  
NOTE: Dispose of used oil at a certied recycling center.  
10. Replace and tighten caps, wash off and dry battery.  
GB - 15  
 
STORAGE  
ACCESSORIES  
See your authorized Gravely Dealer to add these  
optional accessories.  
WARNING: AVOID INJURY. Read and  
understand Storage Safety Rules in Safety  
section before proceeding.  
Part No.  
Description  
78900300  
79200300  
79200400  
79200500  
79200600  
79200900  
79201000  
79201800  
79207600  
Steering Wheel Kit  
SHORT TERM  
Mulching Kit - 60" Mower  
60" Mower Discharge Cover Kit  
Mulching Kit - 50" Mower  
50" Mower Discharge Cover Kit  
Mulching Kit - 72" Mower  
72" Mower Discharge Cover Kit  
50" Bahia Bafe Kit  
IMPORTANT: NEVER spray unit with water or store unit  
outdoors.  
Inspect unit for visible signs of wear, breakage or  
damage.  
Keep all nuts, bolts and screws properly tightened and  
know unit is in safe working condition.  
Store unit in a cool, dry protected area.  
LONG TERM  
72" & 60" Bahia Bafe Kit  
Clean unit thoroughly and lubricate (see Maintenance).  
Touch up all scratched painted surfaces.  
ATTACHMENTS  
Remove weight from wheels by putting blocks under  
frame or axle.  
See your authorized Gravely Dealer to add these  
optional attachments.  
When storing unit for extended periods of time, remove  
all fuel from tank and carburetor (run dry). Refer to  
engine manual.  
Part No.  
890012  
890013  
890014  
Description  
50" Fabricated Mower Deck  
60" Fabricated Mower Deck  
72" Fabricated Mower Deck  
Clean and charge the battery. Charge battery every three  
to four weeks when storing unit.  
TROUBLESHOOTING  
PROBLEM  
PROBABLE CAUSE  
CORRECTION  
1. PTO engaged.  
1. Disengage PTO.  
No sound when  
ignition key placed  
in start position  
2. Directional control pedal depressed.  
3. Loose battery cables.  
4. Discharged battery.  
2. Place direction control pedal in neutral.  
3. Check connections. Tighten battery cable clamps.  
4. Recharge battery.  
5. Blown fuse.  
5. Replace fuse.  
6. Neutral switch adjusted improperly.  
6. Adjust neutral switch per Service and Adjustments.  
1. Discharged battery.  
2. Battery cable corroded.  
3. Starter damaged.  
1. Charge battery.  
2. Clean battery connections.  
3. See your dealer.  
Starter clicks but  
engine does not  
start  
1. Fuel tank empty.  
2. Bad spark plug.  
3. Engine problem.  
1. Fill fuel tank.  
2. See engine manual.  
3. See engine manual.  
Engine cranks but  
does not start  
1. Ignition ground wire disconnected.  
2. Ignition switch failure.  
1. Connect ground wire to clean, metal surface.  
2. Replace ignition switch (see Dealer).  
Engine continues to  
run when ignition  
key in off position  
1. Attachment blocked.  
2. Bad PTO switch.  
1. Stop unit, remove key and clear attachment.  
2. Replace switch (see Dealer).  
Mower wont  
engage  
GB - 16  
 
       
SERVICE PARTS  
Description  
SPECIFICATIONS  
Part No.  
Model Number  
990018  
990020  
03621100  
21416800  
21535900  
21410800  
21397200  
21535800  
09246900  
21525900  
21536100  
07237800  
07235100  
07234600  
07237700  
07235000  
07234900  
07224300  
21416700  
21536000  
09246700  
08899200  
09246600  
08899100  
09097100  
09254700  
Battery  
Description Name  
PM 310  
25 HP  
PM 310  
23 HP  
Air Filter - Kohler  
Air Filter - Kawasaki  
Fuel Filter  
Length  
70" (177.8 cm)  
Height  
50.8" (129 cm)  
Engine Oil Filter - Kohler  
Engine Oil Filter - Kawasaki  
Hydraulic Filter  
Width  
50.3" (127.8 cm)  
Weight lbs. (kg.)  
Battery  
929 (422)  
913 (415)  
12 Volt  
Spark Plug - Kohler (Qty. 2)  
Spark Plug - Kawasaki (Qty. 2)  
PTO (Engine to Deck) Belt (72")  
PTO (Engine to Deck) Belt (60")  
PTO (Engine to Deck) Belt (50")  
Mower Drive Belt (72")  
Mower Drive Belt (60")  
Mower Drive Belt (50")  
Hydraulic Belt  
Brakes  
Dynamic Disc - Parking  
Steering  
Turning Radius  
Yoke  
0˚  
Tire Size - Front  
- Rear  
23 x 10.5 - 12 4 ply  
16 - 6.50 - 8  
Engine  
Manufacturer  
Kohler  
Kawasaki  
Cycle  
4
Engine Power - HP  
Starting System  
Idle RPM  
25 (18.6)  
23 (17.2)  
Element Precleaner - Kohler  
Element Precleaner - Kawasaki  
Blade 50"  
electric  
1800  
Mulching Blade 50"  
Blade 60"  
Governed RPM  
Fuel Tank Capacity  
Fuel  
3600  
7.5 gal. (28.4L)  
See engine manual.  
See engine manual.  
Mulching Blade 60"  
Blade 72"  
Crankcase  
Capacity  
Mulching Blade 72"  
Engine Oil Type  
Air Cleaner  
See engine manual.  
See engine manual.  
See engine manual.  
Hydrostatic Drive  
Spark Plug Gap  
Transmission  
Speed - Forward  
- Reverse  
9.5 mph (15.2 kph)  
5 mph (8 kph)  
Hydraulic System  
Lube  
Mobil 15W-50 Synthetic  
Drive Clutch  
Hydrostatic  
Tire Pressure  
Front  
12 - 15 PSI (82.8 - 103.4 kPa)  
20 - 25 PSI (137.9 - 172.4 kPa)  
Rear  
Lift System  
PTO  
Hydraulic  
Electric Clutch/Brake  
GB - 17  
 
   
2Year Limited Warranty  
Ariens Company hereby warrants to the original consumer purchaser  
that all Gravely Two-Wheel, Professional G, Pro, and ProMaster products  
will be free from defects in material and workmanship for a period of  
two (2) years from the date of purchase or 1000 hours, whichever  
comes first.  
Gravely Division of Ariens Company  
655 West Ryan Street  
P.O. Box 157  
Brillion, WI 54110-0157  
920-756-2141  
Protection Plan  
Ariens Company will repair or replace any part found upon examination  
by the Ariens Company to be defective. Such repair or replacement  
will be free of charge to the purchaser (labor and parts), except as  
noted below.  
Fax 920-756-2407  
This warranty is subject to the following exceptions, conditions, and limitations:  
Usage Requirement  
The duration of this warranty shall be ninety days or 1000 hours, whichever comes first, if the product is rented or leased.  
Purchasers Responsibilities  
Exclusions (No Warranty)  
The purchaser must perform maintenance & minor adjustments  
per the operators manual.  
The purchaser must notify Ariens Company or an authorized  
Gravely service representative of the need for warranty service.  
The purchaser must transport the product to and from the place  
of warranty repair.  
Normal maintenance, services, and normal replacement items,  
such as spark plugs, oil, oil filters, air filters, mufflers, belts,  
tires, shoes, runners, scraper blades, shear bolts, mower blades,  
mower vanes, headlights, light bulbs, knives, etc. are not covered  
by this warranty.  
Any equipment which has been altered, misused, misassembled,  
improperly adjusted, neglected, or damaged by accident is not  
covered by this warranty.  
Service completed by someone other than an authorized  
Gravely dealer is not covered by this warranty.  
Any attachment not approved by Gravely nor any parts that  
are not genuine Gravely service parts are not covered by this  
warranty.  
Engines and engine accessories are covered only by the  
warranty made by the engine manufacturer, and are not covered  
by this warranty.  
Product Registration  
The Gravely dealer must fill out and return the warranty  
registration card to validate the warranty.  
Service Parts and Accessories  
Service parts and accessories not purchased with the product  
covered by this warranty are warranted to be free of defects  
for a period of ninety (90) days following the date of purchase,  
and will be replaced free of charge (except for labor).  
If the product is equipped with a Hydro-Gear transmission  
and/or Hydro-Gear drive components, the Hydro-Gear  
transmission and/or drive components are covered only by the  
warranty made by Hydro-Gear, and are not covered by this  
warranty.  
This warranty applies only to products purchased in the United  
States (including Puerto Rico) and Canada. In all other  
countries, contact place of purchase.  
Service  
Warranty service must be done by an authorized Gravely dealer.  
To find a Gravely dealer near you, contact Ariens Company.  
Battery Warranty Prorated  
One to three months - Free replacement  
Four to twelve months - Prorated over 12 months  
Ariens Company may from time to time change the design of its products. Nothing contained in this warranty shall be construed as  
obligating Ariens Company 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  
Ariens Companys liability under this express warranty, and under  
Ariens Company makes no warranty other than  
any implied warranty that may exist, is limited to repair or replacement  
DISCLAIMER OF FURTHER WARRANTY  
what is expressly made in this warranty. If the law  
of any defective part. In no event shall Ariens Company be liable  
of your state provides that an implied warranty of  
merchantability, or an implied warranty of fitness  
for a particular purpose, applies to Ariens Company,  
any such implied warranty is limited to the duration  
of this express warranty.  
for incidental, special, or consequential damages (including lost  
profits). This warranty gives you specific legal rights. You may also  
have other rights which vary from state to state. Some states do  
not allow the exclusion of incidental or consequential damages, or  
limitations on how long an implied warranty lasts, so the above  
limitations and exclusions may not apply to you.  
Form: GLW2-112701  
GB - 18  
 
 
GRAVELY  
A Division of Ariens Company  
655 West Ryan Street  
P.O. Box 157  
Brillion, WI 54110-0157  
920-756-2141  
Fax 920-756-2407  
 

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