Page 1
Professional G Series
Owner/Operator Manual
987987987
SERIESSERIESSERIES
MODELS
070 - Professional G
071 - Professional G
072 - Professional G
08468700C Rev. 2/99
Supercedes 08468700,A,B
Printed in USA
Page 2
A Message to Gravely Customers . . .
Welcome to the world of Gravely equipment. We are
pleased that you have purchased the best tractor
available. The care you give your Gravely tractor will
determine the satisfaction and service life you will
obtain from it. Use this manual as your guide. By
observing the instructions and suggestions in this
manual, your Gravely tractor will serve you well for
many years.
Your Gravely dealer will be happy to supply any
service or advice which may be required to keep your
Gravely tractor operating at peak efficiency. The
Dealer stocks genuine Gravely par ts and lubricants;
manufactured with the same precision and skill as the
original. A factor y trained staff is kept well informed
on the best methods of servicing Gravely equipment
and is ready and able to serve you. If service is
required, be prepared to supply the service person
with the Model and Serial Number of the tractor, as
well as a full description of the problem encountered.
NOTE: The descriptions and specifications
contained in this manual were in effect at the time the
manual was approved for printing. Gravely reserves
the right to discontinue models without notice and
without incurring obligation. The tractor described
within this manual may not be identified as either
standard or optional and the various illustrations may
not be applicable to your particular unit. If you have
questions, always check with your Gravely dealer.
Safety Alert Symbol and Notations
i
The following safety notations are used throughout
this manual to call attention to special information or
operating procedures. Understand the message in
each notation and be alert to unsafe conditions and
the possibility of personal injury.
NOTE: A NOTE points out general reference
information regarding proper operation and
maintenance practices.
IMPORTANT: An IMPORTANT statement indicates
specific procedures or information that is required to
prevent damage to the machine or its attachments.
This safety alert symbol is used to
attract your attention PERSONAL
SAFETY IS INVOLVED! When you see
this symbol - BECOME ALERT - HEED
ITS MESSAGE.
DANGER: Indicates an imminently
hazardous situation that, if not avoided,
will result in death or serious injury.
WARNING: Indicates a potentially
hazardous situation that, if not avoided,
could result in death or serious injury.
CAUTION: Indicates a potentially
hazardous situation that, if not avoided,
may result in minor or moderate injury.
It may also be used to alert against
unsafe practices.
OL4030
WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
Page 3
08471600 1 Parts Manual
00026793 1 Service Manual
04202200 1 Battery
21527400 1 Air Cleaner (Robin EH64)
21527000 1 Oil Filter (Robin EH64)
21527300 1 Air Cleaner (Robin EH41)
08811700 1 Fuel Filter
21526900 1 Spark Plug (Robin)
08904651 3 Blade-60”
08861651 3 Blade-50”
03498451 3 Blade-40”
07219600 1 V-Belt-60”
07219700 1 V-Belt-60”
07226600 1 Belt-50” Mowerdrive
07226700 1 Belt-40” Mowerdrive
Safety Alert and Notations . . . . . . . . . . . . . . . . . . .i
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . .2
Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Controls and Features . . . . . . . . . . . . . . . . . . . . . .5
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Lubrication and Maintenance . . . . . . . . . . . . . . . .9
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . .15
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . .16
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Warranty . . . . . . . . . . . . . . . . . . .Inside Back Cover
Specific Model and Serial Numbers are on a label
located on the frame of your tractor and on a label
located on the product registration form. Record
those numbers below and transfer the label from the
product registration to place indicated below. Use
these numbers whenever parts or service is required.
Model Number
Serial Number
Model 987070
16 HP Briggs & Stratton, Hydraulic Lift
Model 987071
13.5 HP Robin, Manual Lift
Model 987072
20.5 HP Robin, Hydraulic Lift
Note: All references to “Left”, “Right”, “Front” and
“Rear” are given from operator’s position.
Contents Models
1
©Ariens Company - All Rights Reserved
Publications and Service Parts List
Order the following parts through your Dealer:
Part No. Qty. Description
TRANSFER
MODEL SERIAL
LABEL FROM
PRODUCT
REGISTRATION
Page 4
Safe Operation Practices For Ride-On
Mowers
Failure to observe the following safety instructions
could result in serious injury or death. Your complete
and unimpaired attention is required at all times.
Purchaser must give these instructions to the people
operating and maintaining this tractor.
General Operation
Read, understand, and follow all instructions in this
owners manual, the engine manual, the attachment
manual and on the machine before starting.
Only allow responsible adults, who are familiar with
the instructions, to operate the machine.
Clear the area of objects such as rocks, toys, wire
etc., which could be picked up and thrown by the
mower or other attachment.
Be sure the area is clear of other people & pets
before operating. Stop machine if anyone enters the
area. The operator is responsible for the safety of
bystanders.
Before starting place the PTO lever in “Off” position
and the gear shift lever in the neutral “N” position.
Never carry passengers.
Operate only from operators position, on the seat.
Do not operate in reverse unless absolutely
necessary. Always look down and behind before and
while backing.
Be aware of the attachment discharge direction and
do not point it at anyone. Do not operate without
either the entire attachment or the guarding in place
and functioning properly.
Slow down before turning to prevent tipping or loss of
control.
Never leave a running machine unattended. Always
turn off attachment, set parking brake, stop engine,
move shift control to first gear position, and remove
keys to prevent unauthorized use before dismounting.
Turn off power to attachment when not in use.
Disengage attachment clutch, stop engine, remove
key and wait for moving par ts to stop before leaving
operators position for any reason such as removing,
cleaning, servicing, or unclogging the attachment.
Operate only in daylight or good artificial light.
Do not operate the machine while under the influence
of medication, alcohol or drugs. Safe operation of
this equipment requires your complete and
unimpaired attention at all times.
Watch for traffic when operating near or crossing
roadways or drives. Follow traffic laws when
operating on or near a road.
Use extra care when loading or unloading the
machine into a trailer or truck. When handling
equipment connect the chassis to the transporting
vehicle. Never connect from control levers, rods, or
like items that could be damaged.
Use only attachments or accessories designed for
your unit. See your Gravely Dealer.
Wear sturdy footwear. Do not operate tractor
barefoot or when wearing open sandals or canvas
shoes. Do not wear loose clothing that may get
caught in rotating parts of unit. Wear hand, head, ear
and eye protection.
Slope Operation
Slopes are a major factor related to loss-of-control
and tip-over accidents, which can result in severe
injury or death. All slopes require extra caution. If
you cannot back up the slope of it you feel uneasy on
it, do not operate on it.
Operate up and down slopes, not across. Do not
operate on steep slopes.
Remove obstacles such as rocks, tree limbs, etc.
from the area of operation.
Watch for holes, ruts, or bumps. Uneven terrain could
overturn the machine. Tall grass or deep snow can
hide obstacles.
Use slow speed. Choose a low ground speed so that
you will not have to stop or shift while on the slope.
Engage the directional control pedal slowly.
Follow the manufacturer’s recommendations for
wheel weights or counterweights to improve stability.
Use extra care with grass catchers or other
attachments. These can change the stability of the
machine. Use only approved hitch points.
Limit loads to those you can safely control.
Keep all movement on the slopes slow and gradual.
Do not make sudden changes in speed or direction.
Avoid starting or stopping on a slope. If tires lose
traction, disengage attachment power and proceed
slowly straight down the slope. If you must stop when
going up the slope and can not safely back down,
disengage the PTO, release the direction control
pedal, and depress the brake pedal. Then place the
gear selector in low speed and slowly release the
brake pedal, while slowly engaging the direction
control pedal.
2
Safety Precautions
Page 5
Children
Tragic accidents can occur if the operator is not alert
to the presence of children. Children are often
attracted to the machine activity. Never assume that
children will remain where you last saw them.
Keep children out of the area of operation and under
the watchful care of another responsible adult.
Be alert and turn machine off if children enter the
area.
Before and when backing, look behind and down for
small children.
Never carry children. They may fall off and be
seriously injured or interfere with safe machine
operation.
Never allow children to operate the machine.
Use extra care when approaching blind corners,
shrubs, trees, or other objects that may obscure
vision.
Service
Do not change engine governor setting or over speed
the engine.
Replace damaged or worn out muffler immediately.
Continued use could result in fire or explosion.
Use extra care in handling gasoline and other fuels.
They are flammable and vapors are explosive.
A. Use only an approved container.
B. Never remove gas cap or add fuel with the
engine running. Allow engine to cool before
refueling. Do not smoke. Wipe off any spilled
gasoline and allow vapors to dissipate before
starting engine.
C. Replace fuel tank cap and container cap
securely.
D. Never refuel the machine indoors.
E. Never store the machine or fuel container inside
where there is an open flame, such as in a water
heater. Allow engine to cool before storing in
any enclosure.
Never run a machine inside a closed area. Exhaust
fumes contain carbon monoxide, an odorless and
deadly gas.
Keep nuts and bolts, especially blade attachment
bolts, tight and keep equipment in good condition.
Never tamper with safety devices. Check their proper
operation regularly. See page 7 for operatorpresence control check. If safety interlock is not
functioning properly do not operate the tractor. Have
repaired prior to use.
Keep machine free of grass, leaves or other debris
build up. Clean up oil or fuel spillage. Allow machine
to cool before storing.
Stop and inspect the equipment if you strike an object
or if their is a sudden change in the sound or
vibration of the equipment. Repair any damage
before restarting.
Never make adjustments or repairs with the engine
running or when engine and exhaust parts are hot
from operation.
Grass catcher components are subject to wear,
damage, and deterioration, which could expose
moving parts or allow objects to be thrown.
Frequently check components and replace, with
manufacturer’s recommended parts, when necessary.
Mower blades are sharp and can cut. Wrap the
blade(s) or wear gloves, and use extra caution when
servicing them.
Check brake operation frequently. Adjust and service
as required.
Refer to Storage Section of this owners manual if unit
is to be stored for extended period.
Use only Gravely accessories, attachments and
replacement parts. Replace parts that become
damaged or lost.
Do Not
Do not turn on slopes unless necessary, and then,
turn slowly and gradually downhill, if possible.
Do not operate near drop-offs, ditches, or
embankments. The tractor could suddenly turn over if
a wheel is over the edge of a cliff or ditch, or if an
edge caves in.
Do not operate on wet grass. Reduced traction could
cause sliding.
Do not try to stabilize the machine by putting your
foot on the ground.
Do not use grass catcher on steep slopes.
Safety Precautions (Continued)
3
Page 6
Safety Decals
4
ALTERNATOR ELECTRICAL SYSTEM
PJ0330
Manual Lift Models
Hydraulic Lift Models
CAUTION
DO NOT OPERA TE UNLESS
ALL GUARDS, SHIELDS AND
COVERS ARE IN PLACE
12 VOLT NEGATIVE GROUND
DO NOT REVERSE BATTERY
CONNECTIONS. DISCONNECT
REGULATOR WHEN WELDING
ON EQUIPMENT OR QUICK
CHARGING BATTERY.
HIGHER
POSITION
RELEAS
E
LOWER
POSITION
LIFT RANGE
CONTROL
ON
OFF
PTO
CONTROL
LEVER
THE ENGINE WILL NOT START
UNLESS:
THE PTO CONTROL IS IN THE OFF
POSITION.
THE DIRECTION CONTROL IS IN THE
N
POSITION.
CONFORMS TO ANSI B71.4 SAFETY
STANDARD COMMERCIAL TURF CARE
EQUIPMENT.
SAFETY FIRST
READ THE OPERATORS MANUAL BEFORE
OPERATING OR DOING MAINTENANCE
ON THIS EQUIPMENT.
KEEP ALL GUARDS AND SHIELDS IN POSITION.
NEVER PERMIT CHILDREN TO OPERATE THIS
EQUIPMENT.
NEVER PERMIT PERSONS OTHER THAN THE
OPERATOR TO RIDE ON THIS EQUIPMENT.
LOOK FOR PERSONS AND HAZARDS.
BEFORE LEAVING THE OPERATOR POSITION
- PUT THE PTO CONTROL LEVER IN THE OFF
POSITION.
- REMOVE THE IGNITION KEY.
- LOWER THE ATTACHMENT.
- SET THE BRAKE LOCK FOR PARKING.
HI
DO NOT SHIFT GEAR
OR RANGE SELECTOR
UNLESS VEHICLE IS
STOPPED AND
DIRECTION CONTROL
LEVER IS IN NEUTRAL.
N
LO
RANGE
SELECTOR
LOCK
BRAKE LOCK FOR PARKING
3
W ARNING
1
UNLOCK
STOP
GO
DIRECTION
CONTROL
FORWARD
N
REVERSE
4
N
2
GEAR
SELECTOR
TO USE THE BRAKE LOCK
1. PUSH THE BRAKE PEDAL
DOWN TO STOP.
2. PUT THE BRAKE LOCK LEVER
IN THE LOCK POSITION.
3. PUSH THE BRAKE PEDAL DOWN
AND PUT THE BRAKE LOCK
LEVER IN THE UNLOCK
POSITION TO UNLOCK THE
BRAKE.
CONFORMS TO ANSI B71.4 SAFETY
STANDARD COMMERCIAL TURF CARE
EQUIPMENT.
SAFETY FIRST
READ THE OPERATORS MANUAL BEFORE
OPERATING OR DOING MAINTENANCE
ON THIS EQUIPMENT.
KEEP ALL GUARDS AND SHIELDS IN POSITION.
NEVER PERMIT CHILDREN TO OPERATE THIS
EQUIPMENT.
NEVER PERMIT PERSONS OTHER THAN THE
OPERATOR TO RIDE ON THIS EQUIPMENT.
LOOK FOR PERSONS AND HAZARDS.
BEFORE LEAVING THE OPERATOR POSITION
- PUT THE PTO CONTROL LEVER IN THE OFF
POSITION.
- REMOVE THE IGNITION KEY.
- LOWER THE ATTACHMENT.
- SET THE BRAKE LOCK FOR PARKING.
ON
OFF
PTO
CONTROL LEVER
THE ENGINE WILL NOT START
UNLESS:
THE PTO CONTROL IS IN THE OFF
077253
POSITION.
THE DIRECTION CONTROL IS IN THE
N
POSITION.
HI
W ARNING
DO NOT SHIFT GEAR
OR RANGE SELECTOR
UNLESS VEHICLE IS
STOPPED AND
DIRECTION CONTROL
LEVER IS IN NEUTRAL.
N
LO
RANGE
SELECTOR
UNLOCK
LOCK
BRAKE LOCK FOR PARKING
GO
UP
N
HOLD
DOWN
3
1
GEAR
SELECTOR
TO USE THE BRAKE LOCK
1. PUSH THE BRAKE PEDAL
STOP
DOWN TO STOP.
2. PUT THE BRAKE LOCK LEVER
IN THE LOCK POSITION.
3. PUSH THE BRAKE PEDAL DOWN
AND PUT THE BRAKE LOCK
LEVER IN THE UNLOCK
POSITION TO UNLOCK THE
BRAKE.
DIRECTION CONTROL
FORWARD
N
REVERSE
4
N
2
077254
Page 7
5
Controls and Features
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1. Ammeter 9. Hourmeter (side of panel)
2. Throttle Control 10. Attachment Lift Switch
3. Choke Control 11. Ignition Switch
4. Direction Control Pedal 12. Brake Pedal
5. Gear Selector 13. Brake Lock Lever
6. Range Selector 14. Release Button
7. PTO Control 15. Manual Lift Lever
8. Warning Light (Oil Pressure) 16. Lift Range Control
Figure 1: Control and Feature Locations
PJ0340
PJ0350
Page 8
NOTE: Read the tractor and attachment(s) manuals
before operating the equipment. Operate the tractor
only from the operator’s position on the seat. Service
the tractor and attachment before operating.
Direction Control Pedal
The direction control pedal controls the
movement of the tractor. Push the pedal
forward and lock over center to go forward.
Push the pedal back to move the tractor
backwards (Figure 1).
Range Selector
The range selector has two operating positions. The
forward (“HIGH”) position is the fast gear. The
rearward (“LOW”) position is the slow gear (Figure 1).
Throttle Control
The throttle lever (Figure 1) is used to
control the engine speed. To increase the
engine speed, move the lever up to the
“FAST” position. To decrease the engine
speed, move the lever down to the
“SLOW” position.
Choke Control
The choke control is used to choke a cold
engine for starting. The choke control is
located on the instrument panel (Figure 1).
Pull the choke out to the “ON” position to
choke the engine. When the engine is warm, move
the control to the “OFF”position.
Hourmeter
The hourmeter (on some models) shows total time
which the ignition switch has been in the “ON”
position (Figure 1).
Fuse
All models have a fuse to protect the electrical
system. The fuse is located in the wire harness.
Ignition Switch
The ignition switch is operated with a
removable key. The switch has three
positions: “Off”, “On” and “Start”.
To start the engine, the key must be in the
“Start” position. Once the engine has star ted release
the key and it will return to the run position. To stop
the engine, turn the key to the “Off” position.
Gear Selector
The gear selector has four operating
positions (Figure 1). See specifications for
ground speeds produced in each gear.
Attachment Lift Switch
(Hydraulic Model)
The attachment lift switch is used to raise
and lower the attachment. The lift switch is
located on the instrument panel. Move the switch up
to raise, and down to lower the attachment.
Ammeter
The ammeter indicates the condition of the charging
system. Normal operation will show the indicator
needle slightly to the “Plus”side of zero.
Brake Pedal
Pushing the brake pedal down will stop the tractor
and return the direction control pedal to “NEUTRAL”.
Use the brake pedal for sudden stops and for holding
the tractor on slopes.
Brake Lock Lever
To lock the brake for parking, depress the
brake pedal and pull back on the brake
lock lever. To release, push on the pedal
and move the lock lever forward.
PTO Control
To power an attachment, push the PTO
control forward to “ON”. To stop an
attachment, pull the PTO control rearward
to “OFF”. The operator must be in the
tractor seat to operate the PTO. If the operator
leaves the seat while the PTO control is in the “ON”
position, the engine will stop.
Warning Light
The tractor is equipped with a warning light to alert
the operator in the event there is a problem with the
engine. The warning light is located on the upper left
side of the instrument panel. See Figure 1.
6
Operation
STOP
START
RUN
ON
OFF
LOCK
UNLOCK
STOP
GO
3
1
4
2
N
DOWN
UP
HOLD
N
N
FORWARD
REVERSE
Page 9
NOTE: The light is activated when there is a loss of
oil pressure. If the light comes on while operating the
tractor, stop the tractor and engine as quickly as
possible and check the engine oil level.
To check to see if the light is operating correctly, turn
the ignition switch to the “ON” position. The light
should glow red.
NOTE: The engine must have been off for at least
five minutes prior to performing this test.
Correct Operating Speeds
WARNING: On rough and sloping
ground and when mowing and trimming
near buildings, trees, and other
obstructions, use a slow ground speed.
NOTE: Most attachments, especially rotary mowers
and snowblowers, perform best when operated at full
engine speed. Proper ground speed is determined
by power limitations, the type of terrain, the quality
requirements of the job being performed,
obstructions, hazards, etc.
Using the Attachment Lift Systems
Manual or hydraulic lift systems are used to raise and
lower attachments. Either can hold an attachment in
position or let it follow the ground.
Using the Manual Lift System
To hold an attachment in position:
• Lift the attachment to the raise position.
• Lift the lift range control and slide it to the desired
position.
• Lower the attachment. The lift lever will stop
against the lift range control. If the attachment is
not in the desired position, repeat the first two
steps.
To let an attachment follow the ground:
• Move the lift range control to the lowest position.
• Lower the attachment to the ground.
Using the Hydraulic Lift System
To hold an attachment in position:
• Lift the attachment by moving switch to the “up”
position until the attachment is fully raised.
• Lower the attachment to the desired position by
moving switch to the “down” position.
• When the attachment reaches the desired position,
release the switch. The attachment will be held in
that position.
To let an attachment follow the ground:
• Move the switch to the “down” position.When the
attachment reaches the ground, hold the switch in
the “down”position for approximately 1/2 second
before releasing the switch.
Before Starting the Engine
Be sure that the tractor and engine have been
properly serviced and maintained.
Operator Presence Control
The operator must be sitting in the seat to allow
operation of the power take off (PTO) or traction
drive.
CAUTION: The operator presence
control is intended to stop the engine
whenever the operator is not seated
and the PTO and direction control
pedal are not in the disengaged (PTO Off, direction control pedal - Neutral)
positions. Test this system each time
the tractor is operated. If this system
does not function as described do not
operate until repairs are made. NOTE:
Engine must not start unless PTO is
disengaged and direction control pedal
is in neutral.
Starting and Stopping the Engine
To start the engine:
• The direction control pedal must be in “NEUTRAL”
position and the PTO control must be at “OFF”
position.
• Put the key in the ignition switch.
• Move the throttle lever to a middle position.
• If the engine is cold, move the choke lever to “ON”.
If the engine is warm, the choke lever should be at
“OFF”.
• Turn the ignition key to “START”. When the engine
starts, move the choke lever slowly to “OFF”. If the
engine does not start in five seconds, release the
key for a few seconds and then repeat.If the
engine does not start within five tries see section 6
for instructions.
CAUTION: Do not keep star ter running
for over 15 seconds. Do not run the
starter for more than 15 seconds in any
one minute.
Operation
7
Page 10
To stop the engine:
• Move the throttle lever to “SLOW”and idle with the
PTO control disengaged for approximately 15
seconds.
• Turn the ignition switch of “OFF”.
• Remove the key before leaving the tractor.
Operating the Transmission
Use slow engine and transmission speeds until you
know how to operate the tractor safely.
DO NOT SHIFT TRANSMISSION GEARS
WHILE THE FORWARD OR REVERSE
CLUTCHES ARE ENGAGED OR THE
TRACTOR IS MOVING. This will damage
the gears. Always place the direction
control pedal in “NEUTRAL” and bring
the tractor to a complete stop before
moving the gear or range selectors.
To move in a forward direction:
• Start the engine and move the throttle to give the
desired engine speed.
• Put the range and gear selectors in the positions
that will produce the desired speeds.See section 7
for ground speeds produced.
• Move the direction control pedal forward. As the
tractor increases speed, push the pedal until it
locks into position.If the pedal is not pushed all the
way forward, slippage can damage the forward
clutch. USE CAUTION WHILE LEARNING TO
OPERATE THE DIRECTION CONTROL PEDAL.
NOTE: The operator must be in the seat to operate
the direction control pedal. If the operator leaves the
seat with the direction control pedal in the “Forward”
position, the engine will stop.
To move in a reverse direction:
• Follow the first two steps above.
• Push down firmly on the bottom of the direction
control pedal. The control pedal does not lock into
a reverse position.You must continue to push down
firmly to continue reverse travel.The pedal will
return to “Neutral” upon release.
8
Operation (Continued)
Page 11
Filling The Fuel Tank
WARNING: Use caution with fuel. Fuel
is very flammable. Keep fuel in a clean
and tight container. Keep fuel away
from fire or heat. Never put fuel in the
fuel tank while the engine is running or
hot. Clean up any spilled fuel before
starting the engine.
Add fuel to the fuel tanks as needed. See your
engine manual for the correct type and grade of fuel.
Put the unit in an open area. Stop the engine and
lock the brake. Clean the fuel cap and the area
around the fuel cap to prevent dirt from entering the
fuel tank. See Figure 2. Remove the cap from the
fuel tank. Fill the fuel tank. Be careful not to spill the
fuel. Install the cap on the fuel tank and tighten.
Clean up any spilled fuel before starting the engine.
Engine Maintenance
See the engine manual for maintenance instructions.
Check the air cleaner and engine oil daily. Check the
cooling system every 25 hours. Clean all of the grass
and other material from the cooling fins and intake
screen of the engine. If necessary, remove the
engine shrouds to clean the engine. See the engine
manual for the type of oil, oil change, etc.
Never operate the engine when the oil level is below
the low mark on the dipstick. See the engine manual
for the type of oil, oil change, etc. Never operate the
engine when the oil level is below the low mark on
the dipstick. See the engine manual for air cleaner
maintenance instructions.
Control Linkage Lubrication
Every 25 hours of operation put a drop of engine oil
on the pivots of the throttle lever, the direction control
lever, the gear shift lever, the PTO control, and range
shift handle.
Battery Service
The tractor is equipped with a low maintenance
battery. Check the fluid level every 200 hours or at
the end of the year (Figure 2).Keep the battery clean.
If acid is on the outside of the battery or the electrical
connections are corroded, clean the outside of the
battery with a water and baking soda solution.
Anytime the battery cables are to be disconnected,
remove the negative (-) (ground) cable first. When
replacing the battery cable connect the positive (+)
cable first. Anytime the battery cables are
disconnected, the cable clamps and the battery post
or connection should be cleaned until shiny. There
are brushes make to clean the clamps and battery
posts.
Fastener Check
Check all fasteners after 25 hours of operation to
make sure that they are tight. Replace any fastener
that is missing.
General Lubrication
There are seven grease fittings to be greased at 25hour intervals. Clean the fittings before attaching the
grease gun. Use a high quality lithium base grease.
Add grease until it appears at the ends of the
bearings. The locations of the seven fittings are:
• On the direction control pedal.
• On the front axle at each king pin.
• On the front axle (Figure 3).
• On the steering mechanism (Figure 4).
Apply motor oil to all pin connections, pivot points and
areas where sliding occurs in the clutch,
transmission, PTO, and lift control systems every 25
hours.
9
Lubrication and Maintenance
1
2
3
4
1. Fuel Cap
2. Negative Battery Cable
3. Battery
4. Positive Battery Cable
Figure 2: Battery Connectors
PJ0360
Page 12
Checking the Engine Oil
Check the engine oil level daily. Never operate the
engine with the oil level below the low mark on the
dipstick. See your engine manual for oil
specifications and oil filter service instructions.
To check the oil level:
• Clean around the dipstick to prevent dirt from
entering the tube.
• Remove the dipstick and wipe off the oil.
• Put the dipstick back in place. Be sure it is all the
way down.
• Remove the dipstick again and note oil level.
• Add oil, if needed. Do not overfill.
• Put the dipstick back in place. Be sure it is all the
way down.
Changing the Engine Oil
• Read your engine manual for recommended
change schedule.
• Move the tractor to a level area. Lock the brake.
• If the engine is cold, let it run for 5 minutes.
• When the engine is warm, stop it and raise
the rear fender.
WARNING: Engine muffler and other
parts are hot.
• Clean the areas around the dipstick and
drain plug.
• Remove the dipstick.
• Put an open top container that will hold four quarts
under the drain plug.
• Remove the drain plug.
• Allow the engine to drain completely.
• Clean and reinstall the drain plug.
• Remove the oil filter (some models), clean the oil
filter port and install a new oil filter according to the
instructions on the oil filter.
• Fill with new oil to the “Full” mark on the dipstick.
• Replace the dipstick. Lower the rear fender.
• Start the engine and check for leakage at the drain
plug. Tighten the plug if leakage occurs.
Checking the Battery Fluid
Check the battery fluid every 200 hours. Use caution
and wear eye protection when checking the battery.
To check the battery:
• Clean the top of the battery.
• Lift the filler caps.
• If the fluid level is below the split rings in the filler
tube, add distilled water. Do not fit above the split
ring. Do not use a metal funnel.
• Reinstall the filler caps. Push them all the way
down.
Lubrication and Maintenance (Continued)
1
1. Grease Fitting on the Front Axle
Figure 3: Steering Axle Pivot
10
1
2
3
4
5
3
1. Grease Fittings for the Steering Arms
2. Grease Fittings for the Steering Columns
3. Adjusting Bolt
4. Lock Nut
5. Adjusting Nut
Figure 4: Steering Arms
PJ0370
PJ0380
Page 13
Checking the Fasteners
Every 25 hours, or any time looseness of parts,
rattles, or excess noise and vibration are noted,
check all fasteners. Look for loose or missing
fasteners. Make sure all bolts, screws, nuts, pins,
snap rings, and cotter pins are in the correct position
and replace any that are missing.
Checking the Air Intake Screen
Check the air intake screen on the engine each day.
Remove any grass, dirt, or debris that may have
accumulated on it. The air intake screen must be
kept clean.
Checking the Cooling System
Check the cooling system for signs of the collection of
grass and debris in the engine cooling fins every 25
hours or more often when operated in dirty
conditions. See your engine manual for instructions.
Checking the Air Cleaner
Check the air cleaner each day. See your engine
manual for instructions.
Changing the Air Cleaner Element
Replace the air cleaner element at the correct
intervals. See your engine manual for instructions.
Checking the Transmission Oil
Check the transmission oil level every 200 hours or
twice a year, whichever comes first. If leakage is
observed, check more frequently. The fill tube and
check plug are shown in Figure 5.
To check the transmission oil level:
• Move the tractor to a level area. Stop the engine
and lock the brake.
• Raise the rear fender. Locate and clean the check
plug on the left side of transmission and remove it.
• The oil level is correct when oil is at the bottom of
the hole.
• If the level is correct, reinstall and tighten the plug.
If the level is low, add oil. See Specification
Section for recommended lubricant specifications.
To add oil:
• Remove the fill tube cap. Add oil until it reaches
the bottom of the check plug hole.
• Reinstall and tighten the fill tube cap and check
plug.
11
Lubrication and Maintenance (Continued)
1
2
1. Fill T ube
2. Check Plug
Figure 5: Checking Transmission Oil
PJ0390
Page 14
Adjusting the Brakes
Brake service is required if the brake does not stop
and hold the tractor effectively. The brake should be
effective enough to cause the rear wheels to slide if
applied suddenly on a concrete or asphalt surface.
CAUTION: Replace the brake band
when the lining is as thin as the ignition
key. Replace the brake drum if it is
visibly worn or rough.
To adjust the brake:
• Stop the tractor on a level surface.
• Stop the engine and block the wheels so the tractor
cannot roll.
• Loosen the jam nut and remove the clevis pin (at
the brake band)
NOTE: Do not adjust the brake rod on the left hand
side which attaches to the brake pedal. This rod is for
adjusting the direction control pedal only.
• Turn the clevis clockwise to tighten or
counterclockwise as needed.
• To check the adjustment, reconnect the clevis and
brake band with the pin.
• Push the direction control pedal all the way
forward.
• Push the brake pedal by hand while watching the
motion of the brake band. The brake is correctly
adjusted when the band becomes tight on the drum
as the direction control pedal moves to “Neutral”. If
the band it tight before the pedal moves to
“Neutral”, the brake is too tight. If too tight or too
loose, repeat steps 4, 5, 6 and 7 until the correct
adjustment is obtained.
• Install the cotter pin in the clevis pin and tighten the
jam nut.
• Check the effectiveness of the brake while
operating the tractor.
Adjusting the Forward and Reverse
Clutches
The forward and reverse clutches must be checked
every 100 hours. If the lining has worn to a thickness
of less than 0.150 inch (3.8mm), replace the lining.
The forward clutch is on the right side of the
transmission and the reverse clutch is on the left side
of the transmission (Figure 5).
NOTE: Damage will occur if the tractor is operated
with a lining thickness of less than 0.150 inch
(3.8mm).
Inspect and adjust the clutches as follows:
• Stop the engine and place the direction control
pedal in the “Neutral”position.
• Raise the rear fender.
• Measure the clearance in the slot. The correct
clearance is .030 inch (.76mm) to .060 inch
(1.5mm) for the forward clutch and .010 inch
(.25mm) to .030 inch (.76mm) for the reverse
clutch.
• Adjust the bolts which go through the flange on the
axle bearing retainer so that the forward-reverse
clutch springs are straight up and down when the
clutches have zero clearance. Lock the bolt in
place with the jam nut. Loosen the jam nut which
holds the slide rod bushing in place. Adjust the
bushing on the slide rod until the clearance is
correct. Lock the bushing in place with the jam nut.
• Lubricate the clutch once each season.Remove
the clutch and apply a film of high quality lithium
base grease to the splined clutch shaft. While the
clutch is off, check the lining wear. If the lining has
worn near the rivet heads, replace the lining.
Readjust the clutch as described above.
Adjusting the PTO Clutch
The PTO clutch should be adjusted whenever there is
less than .5 inches of free travel in the clutch lever
when it is in the “On” position. See Figure 6 to see
where this free travel is measured. The free travel
should be between .5 inch and 1.0 inch.
• Stop the engine and lock the brake.
• Loosen the bolts holding the switch bracket and
push the bracket down.
• Raise the rear fender.
• Push the PTO lever to “On”.
• Disconnect the PTO control from the transmission
lever.
12
Adjustments
Figure 6: PTO Clutch Adjustment
MEASURE FREE TRAVEL HERE
CLEARANCE
Page 15
• Turn the control rod to change the free travel.Each
turn will change it by about .25 inch.Turn clockwise
to increase and counterclockwise to decrease the
free travel.
• Reconnect the control rod to the transmission lever.
Check for correct free travel. Repeat above three
steps if necessary.
• Put the PTO control in the “Off” position.
• Move the switch bracket up until the switch closes
(makes a circuit). Tighten the switch bracket
hardware.
CAUTION: Make sure that the PTO
control assembly does not rest on the
switch body.
Adjusting the Steering System
Adjustment of the steering gear is usually needed
whenever there is more than 2 inches of free play in
the steering wheel. To adjust the steering gear:
• Loosen the lock nuts on both adjusting bolts
(Figure 4).
• Turn the steering wheel to the right as far as it will
go.
• Turn the adjusting nut on the left side adjusting bolt
clockwise with your fingers until it is tight.Then
back the nut off one fourth turn.
• Tighten the lock nut against the adjusting nut being
careful not to move the adjusting nut.
• Turn the steering wheel to the left as far as it will
go.
• Repeat the above two steps for the right side
adjusting nut.
• Check for tightness or backlash in the steering gear
through the full range of the steering wheel rotation.
There should be no noticeable tightness or
backlash in the rack and pinion mesh. If there is,
repeat above steps as required.
Upon completion of the steering gear adjustment,
recheck the steering wheel free play. If the free play
is still excessive, look for loose steering arms on the
king pins, loose or worn ball joints, or other signs of
wear. Tighten or replace as required.
Adjust the front wheel toe-in as follows:
• Rotate the steering wheel until the two steering arm
weldments are parallel to the frame side.
• On 13.5 HP and 16 HP engine units, loosen the
jam nuts on the tie rods and disconnect the outside
ball joint. Rotate the front tires by hand so that the
distance between the front centerline of the tire is
1/8” to 1/2” less than the Distance between the rear
centerline. Adjust the tie rods so that the ball joint
can be connected to the tie rod arm without moving
the tire and so that the tie rods are the same length.
Tighten the jam nuts.
• On 20.5 HP units, loosen the jam nuts on the
tie rods and rotate the tire rod tube so that the front
centerline of the tire is 1/8” to 1/2” closer than the
rear centerline and so that the tie rods are the
same length.Tighten the jam nuts.
Servicing the Spark Plug(s)
To clean or change a spark plug:
• Stop the engine, lock the brake, and raise the seat
pan weldment.
• See your engine manual for further instructions.
Servicing the Hydraulic Lift
WARNING: Keep body and hands away
from pin holes or nozzles which eject
hydraulic fluid under pressure. Use
paper or cardboard and not hands to
search for leaks.
Be sure to stop the engine and put the attachment in
the down position before doing any work on hydraulic
parts.
WARNING: Make sure all hydraulic fluid
connections are tight and all hydraulic
hoses and lines are in good condition
before applying pressure to the system.
Hydraulic fluid escaping under pressure may have
sufficient force to penetrate skin and cause serious
injury. Foreign fluid injected into the skin must be
surgically removed within a few hours by a doctor
familiar with this form of injury or gangrene may
result.
Check the hydraulic fluid level when the hydraulic lift
will not raise the attachment or leaks are observed.
To check the hydraulic fluid level:
• Clean the area around the reservoir and cap.
• Remove the cap.
• The correct hydraulic fluid level is one inch from the
top of the reservoir. Add Dextron II ATF to maintain
this level.
Adjustments (Continued)
13
Page 16
Adjusting the Range Selector
• Move the Hi-Lo shift lever as far as it will go in both
directions. Measure the distance between the lever
and the end of the slot.This distance should not be
less than 5/16”.
• Adjust the clevis so that the clearance between the
Hi-Lo shift lever and the control cover plate slot is
equal for both positions of the lever.
Adjusting the Seat
The seat has 4” of front-to-rear adjustment. To adjust
the seat, pull the adjustment lever out and move the
seat forward or backward. Release the lever and
ensure that the seat is locked into position.
Adjustments (Continued)
14
Page 17
Storing the Unit
• Do the daily and 25-hour maintenance, but do not
add gasoline.
• Clean the tractor. Paint or oil bare metal surfaces
to prevent rust.
NOTE: Do not use harsh or abrasive cleaners on any
painted surface. Do not allow gasoline or oil to
remain on any silk screened surface.
• Refer to the engine manual and prepare the engine
for storage.
• Clean and charge the battery. Charge the battery
every three or four weeks while in storage.
• Place the PTO lever in “OFF” position.
• Store in a cool, dry place.
IMPORTANT: NEVER spray unit with water or store
unit outdoors to aid in prevention of rust or corrosion.
Water can seep into sealed bearings, which are
sealed against dirt and debris only, causing reduced
component life.
Taking the Unit Out of Storage
• Refer to the engine manual and prepare the engine
for service.
• Charge the battery.
• Put fresh, clean gasoline in the fuel tank.
Storage
15
Service Manual
Service manuals are available for owners who wish to
perform some of their own maintenance and service
operations. Should a complete ser vice manual be
desired, order under the following part number.
When ordering parts always include the Model and
Serial Number of your unit to assure prompt service.
A parts manual is included in your literature package
to make ordering of service parts easier.
Professional G Series
Service Manual Part No. 00026793
Tractor Model Number
Tractor Serial Number
Mail Request to: Ariens Service
655 West Ryan Street
P.O. Box 157
Brillion,WI 54110-0157
Page 18
1. No sound or motion when the ignition switch
is turned to the “Start”position.
PTO control in the “On” position.
Direction control pedal in the forward or reverse
position.
Blown fuse.
Discharged battery.
Starting solenoid damaged.
Loose battery cable(s).
Damaged time delay module.
2. When the ignition switch is turned to “Start”,
the solenoid “clicks” and the engine starter
motor does not operate.
Discharged battery.
Battery cable connector(s) corroded.
Starter damaged.
3. When the ignition switch is turned to “Start”,
the starter operates but the engine does not
start.
Relay or relay connection(s)
Fuel tank empty.
Fuel valve turned off
Engine spark plug(s) fouled.
Engine failure -- see Engine Service Manual
4. Battery discharged.
Regulator-rectifier failure.
Fuse holder or battery.
Engine alternator failure.
Battery failure.
5. Engine continues to run when the ignition
switch is rotated to the “Off” position.
Ground wire not connected.
Ignition switch failure.
6. Lights do not come on when the light switch
is moved to the “ON” position.
Light(s) burned out.
Defective light switch
Loose wire connections
Engine light alternator failure
Ignition switch failure.
7. Engine runs rough or stops after it gets hot.
See Engine Service Manual.
Time delay failure.
8. Fuse blows when starting engine.
Defective solenoid.
9. Hydraulic lift will not lift attachment.
Hydraulic pump seals
Cylinder seals
Low fluid level
Hydraulic pump
Relief valve setting
Blown Fuse
Trouble Shooting
16
Page 19
Model No. 987071 987072
Description Name 13.5 HP Robin 20.5 HP Robin
Manual Lift Hydraulic Lift
Length 82” (208.3 cm) 82” (208.3 cm)
Width 41.5” (105.4 cm) 43.2” (109.7 cm)
Height 51” (129.5 cm) 51” (129.5 cm)
Weight 858 lbs. 863 lbs.
Wheelbase
Battery 12 V olt BCI Group 12 V olt BCI Group
22F, 42 AMP Hr 22F, 42 AMP Hr
Brakes External Band Brake External Band Brake
on transmission, on transmission,
individual rear wheel individual rear wheel
brakes optional brakes optional
Steering Rack & Pinion Rack & Pinion with
heavy tie rods
Turning Radius 26.5”(67.3 cm) 26.5” (67.3 cm)
Tire Sizes
Front 16 x 6.5 - 8 16 x 7.5 - 8
Rear 23 x 8.5 - 12 23 x 8.5 - 12
Tire Pressure
Front 14-18 PSI 14-18 PSI
(97-124 kN/m
2
) (97-124 kN/m2)
Rear 16-14 PSI 16-14 PSI
(69-97 kN/m2) (69-97 kN/m2)
Engine
Type Robin Robin
Model No. EH41 EH64
HP 13.5 20.5
RPM Hi/Low 3300/1600 3300/1600
Engine Oil See Engine Manual See Engine Manual
Engine Oil Capacity See Engine Manual See Engine Manual
Fuel Specifications See Engine Manual See Engine Manual
Fuel Tank Capacity 5.3 Gals. (20 Liters) 5.3 Gals. (20 Liters)
Fuse 25 AMP 25 AMP
Transmission 6 Qt. 6 Qt.
Oil Capacity (5.7 Liters) (5.7 Liters)
Transmission Type API Service API Service
SC10W-30 Motor Oil SC10W-30 Motor Oil
Hydraulic Type N/A ATF Dextron II
Hydraulic Capacity N/A 1 Qt.(.9 Liter)
Specifications
17
987070
16 HP Briggs & Stratton
Hydraulic Lift
82” (208.3 cm)
41.5” (105.4 cm)
51” (129.5 cm)
860 lbs.
12 V olt BCI Group
22F, 42 AMP Hr
External Band Brake
on transmission,
individual rear wheel
brakes optional
Rack & Pinion
26.5” (67.3 cm)
16 x 6.5 - 8
23 x 8.5 - 12
14-18 PSI
(97-124 kN/m
2
)
16-14 PSI
(69-97 kN/m2)
Briggs & Stratton
303447
16
3300/1600
See Engine Manual
See Engine Manual
See Engine Manual
5.3 Gals.(20 Liters)
25 AMP
6 Qt.
(5.7 Liters)
API Service
SC10W-30 Motor Oil
ATF Dextron II
1 Qt. (.9 Liter)
Page 20
Ground Speeds (at 3600 rpm Engine Speed):
Specifications (Continued)
18
TRACTOR GROUND SPEEDS
FORWARD R EVERSE
Gear
1 .5 mph (.8 km/hr) 2.5 mph (4.0 km/hr) 1.1 mph (1.8 km/hr) Same
2 .8 mph (1.2 km/hr) 3.8 mph (6.1 km/hr) 1.7 mph (2.7 km/hr) Same
3 1.1 mph (1.8 km/hr) 5.7 mph (9.2 km/hr) 2.5 mph (4.0 km/hr) Same
4 1.7 mph (2.7 km/hr) 8.5 mph (13.7 km/hr) 3.8 mph (6.1 km/hr) Same
"LO" Range "HI" Range "LO" Range
"HI" Range
Page 21
See your authorized Ariens dealer to add these additional attachments
to your Tractor.
Attachments
19
88500400 - 40” Mower Deck
78700300 - Front Adaptor Kit Required
88701100 - 48” Snow Dozer Blade
83300600 - 48” Sno Blower
88500600 - 50” Mower
88700300 - 60” Mower
88701500 - Roll Over Protection
88703900 - Sunshade Kit
88501500 - 44” Power Brush
78700200 - Completing Kit Required
88501000 - Rotary Plow
78700300 - Front Adaptor Kit Required
088700700 - Grass Catcher Blower
& Frame Assembly
833002 - 3 - Can Grass Catcher
Assembly
Page 22
Enhance you Series G Tractor with these Gravely Accessories
Mowing Accessories
78500800 40” Mower Drive
78700200 Front Drive Kit
78700300 Front Adapter Kit
78501300 Front Anti-Scalp Roller
78501400 Rear Anti-Scalp Roller
78700400 Drive Kit For Kohler Engines
78700500 Boot Kit For 40”Mower
78700600 Boot Kit For 50”Mower
78700700 Boot Kit For 60”Mower
Garden Accessories
78701200 Liftable Rear Hitch
78700200 Front Drive Kit
78700300 Front Adapter Kit
78503000 Attachment Adapter Kit
Snow Removal Accessories
78701400 44” Power Brush Completing Kit
78700200 Front Drive Kit
73500700 Snowblower Drift Bar
78701500 Tire Chain (23 x 8:50) (Pair)
78701600 Tire Chains (23 x 10:50) (Pair)
78701700 Safety Light (Cab)
78701800 Glass Windshield (Cab)
78701900 Electric Wiper (Cab)
Miscellaneous Accessories
78700300 Front Adapter Kit
78702100 Lift Assist Kit
78702400 Front Wheel W eights (Pair)
78702500 Front Wheel W eights (Pair)
78702600 Rear Wheel Weights (Each)
78705100 Engine Guard
78705200 Tractor Cover
78707800 Arm Rest Kit
78703000 Forward/Reverse Lever Kit
78707900 Debris Basket
78506600 High Lift Blade Kit 40”
78506700 High Lift Blade Kit 50”
78705400 High Lift Blade Kit 60”
78506800 Sand Blade Kit 40”
78506900 Sand Blade Kit 50”
78707700 Electric Hydraulic Lift Kit
Be sure to always use genuine Gravely parts to keep your
tractor running like new.
20
Accessories
Page 23
Accessories 20
Adjustments 12
Adjusting the Brakes 12
Adjusting the Forward and Reverse Clutches 12
Adjusting the PTO Clutch 12
Adjusting the Range Selector 14
Adjusting the Seat 14
Adjusting the Steering System 13
Servicing the Hydraulic Left 13
Servicing the Spark Plugs 13
Attachments 19
Controls and Features 5
Lubrication and Maintenance 9
Battery Service 9
Changing the Air Cleaner Element 11
Changing the Engine Oil 11
Checking the Air Intake Screen 11
Checking the Air Cleaner 11
Checking the Air Cleaner Element 11
Checking the Battery Fluid 10
Checking the Cooling System 11
Checking the Engine Oil 10
Checking the Fasteners 11
Checking the Transmission Oil 11
Control Linkage Lubrication 9
Engine Maintenance 9
Fastener Check 9
Filling the Fuel Tanks 9
General Lubrication 9
Models 1
Operation 6
Ammeter 6
Attachment Lift Switch 6
Before Starting the Engine 7
Brake Lock Lever 6
Brake Pedal 6
Choke Control 6
Correct Operating Speeds 7
Direction Control Pedal 6
Fuse 6
Gear Selector 6
Hourmeter 6
Ignition Switch 6
Operating the Transmission 8
Operator Presence Control 7
PTO Control 6
Range Selector 6
Starting and Stopping the Engine 7
Throttle Control 6
Using the Attachment Lift Systems 7
Warning Light 6
Safety Alert Symbol and Notations i
Safety Decals 4
Safety Precautions 2
Children 3
General Operation 2
Service 3
Slope Operation 2
Service Manual 15
Specifications 17
Storage 15
Storing the Unit 15
Taking the Unit Out of Storage 15
Trouble Shooting 16
Warranty Inside Back Cover
Index
21
Page 24
655 West Ryan Street • P.O. Box 157 • Brillion, WI 54110-0157 • 920-756-2141 • Fax: 920-756-4421
Ask Your Dealer For Information On
These Other Fine GRAVELY Products
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• Pro Commercial Walk-Behind Mowers
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• Pro Zero-Turn-Radius Walk-Behind Mowers
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