Gravely 885015 Product manual

Owner/Operator & Parts Manual
Models
885015 - Power Brush
785023 - Two-Wheel Tractor Completing Kit
787014 - Four-Wheel Tractor Completing Kit
08416400G 9/06
Printed in USA
44-Inch Power Brush

2
4
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Service and Adjustments . . . . . . . . . . . . . . . . . . . .17
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
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.
All reference to left, right, front, or rear are given from
operator sitting in the operation position and facing the
direction of forward travel.
SERVICE AND REPLACEMENT PARTS
When ordering publications,
replacement parts, or making service
inquiries, know the Model and Serial
numbers of your unit and engine.
Numbers are located on the product
registration form in the literature
package. They are printed on a serial
number label, located on the frame of
your unit (Figure 1).
• Record Unit Model and Serial numbers here.
• Record Engine Model and Serial numbers here.
PRODUCT REGISTRATION
The Gravely dealer must register the product at the time
of purchase. Registering the product will help the
company process warranty claims or contact you with the
latest service information. All claims meeting
requirements during the limited warranty period will be
honored, whether or not the product registration card is
returned. Keep a proof of purchase if you do not register
your unit.
Customer Note: If dealer does not register your product,
please fill out, sign and return the product registration
card to Gravely or go to www.gravely.com on the internet.
UNAUTHORIZED REPLACEMENT PARTS
Use only Gravely replacement parts. The replacement of
any part on this equipment with anything other than a
Gravely authorized replacement part may adversely
affect the performance, durability, and safety of this unit
and may void the warranty. Gravely disclaims liability for
any claims or damages, whether regarding warranty,
property damage, personal injury or death arising out of
the use of unauthorized replacement parts.
NOTE: To locate your nearest Gravely dealer, go to
www.gravely.com on the internet.
DISCLAIMER
Gravely reserves the right to discontinue, change, and
improve its products at any time without public notice or
obligation to the purchaser. The descriptions and
specifications 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.
DEALER DELIVERY
Dealer should:
1. Check all controls for proper function.
2. Fill out Original Purchaser Registration Card and
return the card to Gravely.
3. Explain Gravely Limited Warranty Policy.
TABLE OF CONTENTS
INTRODUCTION
Transfer
model &
serial
number
label from
product
registration
here.
Figure 1
Serial Number Label
© Copyright 2006 Ariens Company

3
4. Explain recommended lubrication and
maintenance. Advise customer on adjustments. 5. Instruct customer on controls and operation of unit. Discuss and emphasize the Safety Precautions.
Give customer Owner/Operator, Parts, and Engine
Manuals. Advise customer to thoroughly read and
understand them.
SAFETY ALERTS
Look for these symbols to point out
important safety precautions. They mean:
Attention!
Personal Safety Is Involved!
Become Alert!
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.
NOTATIONS
NOTE: General reference information for proper
operation and maintenance practices.
IMPORTANT: Specific procedures or information
required to prevent damage to unit or attachment.
PRACTICES AND LAWS
Practice usual and customary safe working precautions,
for the benefit 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,
including those that may restrict the age of the operator.
REQUIRED OPERATOR TRAINING
Original purchaser of this unit was instructed by the seller
on safe and proper operation. If unit is to be used by
someone other than original purchaser; loaned, rented or
sold, ALWAYS provide this manual and any needed
safety training before operation.
SAFETY DECALS AND LOCATIONS
ALWAYS replace missing or damaged Safety Decals.
Refer to Figure 2 for Safety Decal locations.
1. CAUTION
• Keep hands, feet and clothing clear of moving
parts, intake and discharge openings.
• Read owner’s manual.
SAFETY
WARNING: This machine is capable of
amputating hands and feet and throwing
objects. Failure to observe the safety
instructions in the manuals and on decals
could result in serious injury or death.
Slopes are a major factor related to
loss-of-control and tip-over accidents.
Operation on all slopes requires extra caution.
Tragic accidents can occur if the operator is
not alert to the presence of children. Never
assume that children will remain where you
last saw them.
Gasoline is extremely flammable and the
vapors are explosive, handle with care.
Disengage attachment, stop unit and engine,
remove key, engage parking brake, and allow
moving parts to stop before leaving operator’s
position.
DANGER: IMMINENTLY HAZARDOUS
SITUATION! If not avoided, WILL RESULT in
death or serious injury.
WARNING: POTENTIALLY HAZARDOUS
SITUATION! If not avoided, COULD RESULT
in death or serious injury.
CAUTION: POTENTIALLY HAZARDOUS
SITUATION! If not avoided, MAY RESULT in
minor or moderate injury. It may also be used
to alert against unsafe practices.
Figure 2
1

4
• Stop engine then disengage power take-off to
attachment before making adjustments or removing
foreign objects.
• Keep all shields in place
• Keep all bystanders away.
• Use caution in directing discharge.
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.
ALWAYS remove key (if equipped) and disconnect wire
from spark plug before assembly. Unintentional engine
start up can cause death or serious injury.
Complete a walk around inspection of unit and work area
to understand:
• Work area
• Your unit
• All safety decals
ALWAYS check overhead and side clearances carefully
before operation.
ALWAYS be aware of traffic 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.
Keep area of operation clear of all toys, pets, and debris.
Thrown objects can cause injury.
Check for weak spots on docks, ramps or floors. Avoid
uneven work areas and rough terrain.
Avoid slippery surfaces. ALWAYS be sure of your footing.
Keep a firm hold on the handlebar. Walk, NEVER run.
DO NOT operate on wet grass.
Dust, smoke, fog, etc. can reduce vision and cause an
accident. Operate unit only when there is good visibility
and light.
Read the entire Owner/Operator manual and other
training material. If the operator or the mechanic cannot
read the manual, it is the owner’s responsibility to explain
it to them. Only the user can prevent and is responsible
for accidents or injuries occurring to themselves, other
people or property.
• Only trained adults may operate or service unit
• Training includes actual operation
NEVER allow children to operate or play on or near unit.
Be alert and shut off unit if children enter area.
Never carry passengers.
NEVER operate unit after or during the use of
medication, drugs or alcohol. Safe operation requires
your complete and unimpaired attention at all times.
NEVER allow anyone to operate this unit when their
alertness or coordination is impaired.
Wear adequate safety gear, protective gloves and
footwear.
NEVER wear open sandals or canvas shoes during
operation.
Protect eyes, face and head from objects that may be
thrown from unit. Wear appropriate hearing protection.
Sharp edges can cut. Moving parts can cut off fingers or
a hand. Wrap blade(s), wear sturdy gloves and use
extreme caution when servicing. On multi-blade mowers,
rotation of one blade will cause all blades to rotate.
ALWAYS keep hands and feet away from all rotating
parts during operation. Rotating parts can cut off body
parts.
ALWAYS keep hands away from all pinch points.
DO NOT touch unit parts which might be hot from
operation. Allow parts to cool before attempting to
maintain, adjust or service.
NEVER place your hands or any part of your body or
clothing inside or near any moving part while unit is
running.
DO NOT wear loose clothing or jewelry. Tie back hair that
may get caught in rotating parts.
Keep children and people away from unit during
operation.
Fumes from engine exhaust can cause injury or death.
DO NOT run engine in an enclosed area. Always provide
good ventilation.
Thrown objects can cause injury and property damage.
DO NOT point discharge at anyone or discharge directly
onto paved or gravel surfaces.
Always stand clear of the discharge area when operating
this unit.
Read, understand, and follow all instructions in the
manual and on the machine before starting.
Understand:
• How to operate all controls
• The functions of all controls
• How to STOP in an Emergency
• Braking and steering characteristics
• Turning radius and clearance
ALWAYS keep protective structures, guards, and panels
in good repair, in place and securely fastened.
NEVER modify or remove safety devices.
ALWAYS keep discharge cover or complete grass
catcher in place and in proper working condition.
Check steering control operation frequently. Adjust and
service as required.
Safety Interlock System must function properly. DO NOT
operate unit if operator presence control is damaged or
disabled.

5
If you strike an object, or if equipment vibrates
abnormally, stop engine at once, disengage PTO, wait for
all moving parts to stop, and remove key. Check for any
damage or loose parts. Repair before restart.
Before starting engine: disengage PTO and place unit in
neutral.
DO NOT operate at too fast a rate. DO NOT change
engine governor settings or over-speed engine. Slow
down and turn corners slowly.
Disengage PTO when attachment is not in use. ALWAYS
turn off power to attachment when travelling, crossing
driveways, etc.
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.
DO NOT try to stabilize unit by putting foot on ground
when operating with applicable riding attachments.
When engine is running and speed control lever is
forward, holding only one steering lever will cause unit to
circle around one drive wheel.
Use care when approaching blind corners, shrubs, trees
or other objects that may obscure view.
ALWAYS disengage PTO, stop unit and engine, remove
key and allow moving parts to stop before leaving
operator’s position.
Never leave a running unit unattended. ALWAYS shut off
engine before leaving unit.
ALWAYS remove key to prevent unauthorized use.
DO NOT operate in reverse unless absolutely necessary.
ALWAYS backup slowly. ALWAYS look down and behind,
before and while backing.
DO NOT operate on steep slopes. DO NOT operate on
slopes of more than 5°. Operate across the face of
slopes, not up and down.
Turf conditions can affect the unit’s stability.
Keep all movement on slopes slow and gradual. DO NOT
make sudden changes in speed or direction. Use a slow
speed to avoid stopping or shifting on slopes. Avoid
starting or stopping on a slope.
DO NOT park unit on a slope unless absolutely
necessary. When parking on a slope always chock or
block wheels.
Use extra care when loading or unloading unit onto trailer
or truck.
Secure unit chassis to transport vehicle. NEVER secure
from rods or linkages that could be damaged.
DO NOT transport machine while engine is running.
Keep unit free of grass, leaves, or other debris. Clean up
oil or fuel spills.
This product is equipped with an internal combustion
engine. DO NOT use on or near any unimproved, forest
covered or brush covered land unless the exhaust
system is equipped with a spark arrester meeting
applicable local, state or federal laws. A spark arrester, if
used, must be maintained in effective working order by
the operator.
Fuel is highly flammable and its vapors are explosive.
Handle with care. Use an approved fuel container.
No smoking, No sparks, No flames. ALWAYS allow
engine to cool before servicing.
NEVER fill fuel tank when engine is running or hot from
operation.
NEVER fill or drain fuel tank indoors.
Replace fuel cap securely and clean up spilled fuel.
Never fill containers inside a vehicle or on a truck or
trailer bed with a plastic liner. Always place containers on
the ground away from your vehicle before filling.
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 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.
If fuel is spilled on clothing, change clothing immediately.
NEVER store fuel inside where there is an open flame,
such as a water heater.
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.
Reverse connections may cause sparks which may result
in injury. ALWAYS connect/disconnect cables in proper
order.
Poisonous battery fluid contains sulfuric acid and its
contact with skin, eyes, or clothing can cause severe
burns.
Explosive Gases! No flames, 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.
ALWAYS keep batteries out of reach of children.
HYDRAULIC FLUID can result in severe burns. Fluid in
hydraulic system can penetrate skin and result in serious
injury or death.
• Be sure to stop the engine before doing any work on
hydraulic parts.
• Keep body and hands away from pin holes or
nozzles which expel hydraulic fluid when under
pressure. Use paper or cardboard, not hands, to
search for leaks.

6
• Ensure all hydraulic fluid connections are tight and all
hydraulic hoses and lines are in good condition
before applying pressure to system.
• FOREIGN FLUID INJECTED INTO BODY can result
in gangrene. Fluid must be surgically removed within
a few hours by a doctor familiar with this form of
injury.
Before making any inspections, repairs, etc.: disengage
PTO, stop unit and engine, remove key, allow moving
parts to stop.
Allow hot parts to cool.
ALWAYS block wheels, engage parking brake and know
all jack stands are strong, secure and will hold weight of
unit during maintenance.
An extension spring, when extended, stores energy and
can be dangerous. Always use tools specifically
designed for installing or removing an extension spring.
Always compress or extend springs slowly.
ALWAYS maintain unit in safe operating condition.
Damaged or worn out muffler can cause fire or explosion.
Keep hardware, especially blade attachment bolts, tight.
Maintain or replace safety and instruction labels, as
necessary.
For unit storage or extended storage:
• NEVER store with fuel in fuel tank, inside a building
where any ignition sources are present.
• Allow engine to cool completely.
Use only attachments or accessories designed for your
unit and that can be used safely on your terrain.
Check attachment components frequently. If worn or
damaged, replace with manufacturer’s recommended
parts.
To reduce fire hazard and overheating, keep equipment
free of grass, leaves, debris or excessive lubricants.
Use extra care with grass catchers and other
attachments. These can change the stability of the unit.
Use only approved hitch points.
ALWAYS be aware of attachments when turning.
ALWAYS allow adequate clearance between
attachments, personnel, and other objects.
Gravely does not recommend the use of a Sulky with this
unit.

7
Package Contents:
Check the contents of your kit for the parts listed.
NOTE: This manual covers the following three kits:
• 88501500 - Power Brush
• 78502300 - Gear Two-Wheel Tractor Completing
Kit
• 78701400 - Four-Wheel Tractor Completing Kit
IMPORTANT: The following kits are required to install the
power brush, kit number 88501500:
• Four-Wheel Tractors must have kit 78701400.
• Gear Two-Wheel Tractors must have kit 78502300.
• Rapid units must have kit 78510700.
88501500 - Power Brush (Figure 3)
78502300 - Gear Two-Wheel Tractor Completing
Kit (Figure 3)
ASSEMBLY
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
Item Description Qty Part Number
1 Power Brush 1 88501500
2 Double Universal Joint 1 011967*
3 Knob 1 07515900**
4 5/16” x 1-1/4” Hex Bolt 1 05947500**
5 Flat Washer 1 06436700**
6 5/16” Spin Lock Flange Nut 1 06530400**
*Used on Gear Two-Wheel Tractors and Rapid units.
** Used on Rapid units.
Figure 3
1
2
3
6
5
4
Item Description Qty Part Number
7 Bearing Assembly 1 039739
8 Bushing 1 019297
9 Knob 1 019295
10 1/2” x 2-34” Hex Bolt 1 05965500
11 Control Rod Guide 1 019296
12 Grommet 1 012325
13 Control Rod 1 040561
14 Flat Washer 1 06437300
15 Cotter Pin 1 06713500
Figure 4
9
10
12
13
14
15
11
7
8

8
78701400 - Four-Wheel Tractor Completing Kit
(Figure 5)
Item Description Qty Part Number
16 Plastic Grommet 2 011777
17 Knob 1 019295
18 Control Rod 1 040561
19 Control Rod Bracket Grommet 1 012325
20 1/4 x 3/4” Self Tapping Screw 2 07414200
21 Control Rod Bracket 1 040562
22 Flat Washer 1 06437300
23 Cotter Pin 1 06713500
24 1/2” x 1-1/2” Hex Bolt 4 05962000
25 Adapter 1 019866
26 1/4” Nylon Locknut 1 06531000
27 1/2” x 2" Hex Bolt 1 05967100
28 Universal Joint 1 013518
29 Zerk 1 411027
30 Universal Joint 1 019871
31 Plastic Grommet 2 011777
32 Push Rod 1 011967
33 Cotter Pin 1 06714000
34 1/2” Nylon Locknut 4 06540600
Figure 5
16
19
18
22
23
21 20
17
30
29
28
27
26
31
34
32
33
25
24

9
INSTALLATION OF POWER BRUSH TO
RAPID UNITS
1. Install Rapid adapter kit number 78510700 to the
unit (figure 6). See kit 78510700 for installation
instructions.
2. Install double universal joint (item 2) on Rapid
adapter kit.
3. Install hex bolt, spacer and nut from Rapid adapter
kit as shown in figure 6.
NOTE: The three other hex bolts, spacers and nuts from
the Rapid adapter kit are not needed for this application.
4. Install Rapid adapter kit and double universal joint
(item 2) on power brush (item 1) (figure 7).
5. Install washer and lynch pin on Rapid adapter kit.
IMPORTANT: MAKE SURE attachment locking pin is
completely seated prior to engaging the PTO.
6. Install knob (item 3) on power brush (item 1) with
5/16” x 1-1/4” hex bolt (item 4), flat washer (item 5)
and 5/16” spin lock flange nut (item 6) (figure 7).
INSTALLATION OF FOUR-WHEEL
TRACTOR COMPLETING KIT (KIT #
78701400)
1. Install adapter (item 25) on the power brush
(item 1) with four 1/2” x 1-1/2” hex bolts (item 24)
and 1/2” nylon locknuts (item 34) (figure 8).
2. Install two plastic grommets (item 16) into the
square holes in the left side of the frame (figure 9).
3. Install the control rod bracket (item 21) with two 1/4
x 3/4” self tapping screws (item 20).
Figure 6
2
Rapid Adapter Kit 78510700
Hex Bolt, Spacer, Nut
Figure 7
2
1
Rapid Adapter Kit 78510700
Engage
Attachment
Locking Pin
3, 4, 5 & 6
Washer &
Lynch Pin
Figure 8
24 & 34 25

10
4. Install the control rod bracket grommet (item 19)
into the hole in the control rod bracket (item 21).
5. Install the splined end of the universal joint
(item 28) with the splined end of the power brush
shaft with 1/2” x 2" hex bolt (item 27) and 1/4” nylon
locknut (item 26) (figure 10).
6. Put multipurpose grease on the square end of the
universal joint (item 30).
7. Install square shaft of universal joint (item 30) into
universal joint (item 28) (figure 10).
INSTALLATION OF POWER BRUSH TO
FOUR-WHEEL TRACTOR
NOTE: The four-wheel tractor completing kit (kit #
78701400) must be installed first.
1. Ensure that the hydraulic lift cylinder is bolted to the
top hole (Hole A) in the lift arm weldment. The bolt
must be moved again to the bottom hole (Hole B)
when the center mount mower is attached. See
figure 11.
2. Open the equipment latch on the unit. See
figure 12.
3. Place the adapter (item 25) into position in the
equipment latches. Close the equipment latches
and install the cotter pins (figure 12).
4. Place the locking collar of the universal joint
(item 30) on the front PTO shaft.
NOTE: Pull the locking collar toward the universal joint
and hold it. If the universal joint has the locking collar that
twists, twist the locking collar in the direction of the
arrows and hold it. Slide the locking collar halfway on the
PTO shaft and release the locking collar. Push the
locking collar on the PTO shaft until it locks in position.
NOTE: If the power brush is to be connected to the 8000
Series tractor (with the long frame) or the 8000-G Series
tractor, install the rod without the spacer and washer.
5. Install push rod (item 32) on adapter (item 25) with
cotter pin (item 33) (figure 12).
6. Install control rod (item 18) through the control rod
bracket (item 21) and install knob (item 17)
(figure 9).
Figure 9
16 & 20
21
21 18 17
Figure 10
26 & 27 30
28 Locking
Collar
WARNING: Unintentional startup or contact with
exposed components can cause severe
personal injury. Stop the engine, wait for all
parts to come to a complete stop, remove the
key from the ignition switch, and disconnect the
spark plug wire before performing any
maintenance, installation, removal, or
adjustment.
Figure 11
Hole “A”
Hole “B”

11
7. Install control rod (item 18) to power brush (item 1)
with flat washer (item 22) and cotter pin (item 23)
(figure 12).
INSTALLATION OF TWO WHEEL TRACTOR
COMPLETING KIT (KIT # 78502300)
1. Remove the nut and hex bolt that fastens the gear
shift control lever to the handlebar. Keep the nut
and hex bolt (figure 13).
2. Install control rod guide (item 11) on handlebar and
gear shift control with 1/2” x 2-34” hex bolt (item 10)
and the nut removed in step 1.
3. Install grommet (item 12) in the control rod guide
(item 11).
4. Put the bushing (item 8) on the top right side
attachment adapter stud. Put the nut on the stud
and tighten (figure 14).
5. Install double universal joint (item 2) power brush
(item 1) shaft drive (figure 15).
Figure 12
22 & 23 Contact
Adjustment 18
Contact
Adjustment
25
Equipment
Latch Cotter Pin 32
33
Figure 13
9
Remove original nut and
hex bolt and replace with
the hex bolt with item 10.
Gear Shift
Control
13 12 11
Figure 14
Attachment
Adapter
Quick Hitch
Pin
Nut
8Adapter Stud
Figure 15
Hitch Pin
Hole
2

12
INSTALLATION OF POWER BRUSH TO THE
GEAR TWO-WHEEL TRACTOR
1. Install the quick hitch pin into the hitch pin hole on
the brush mounting bracket 1.25" (3.18 cm)
(figure 15).
2. Install double universal joint (item 2) on the tractor
drive shaft. Push the power brush (item 1) all the
way on the quick hitch pin and install the flat washer
and the lynch pin (figure 16).
3. Install control rod (item 13) through control rod
guide (item 11) and install knob (item 9) (figure 14
on page 11).
4. Installcontrol rod (item 13) on latch release with flat
washer (item 14) and cotter pin (item 15)
(figure 16).
WARNING: Unintentional startup or contact with
exposed components can cause severe
personal injury. Stop the engine, wait for all
parts to come to a complete stop, remove the
key from the ignition switch, and disconnect the
spark plug wire before performing any
maintenance, installation, removal, or
adjustment.
Figure 16
QuickHitch
Pin
Pivot Washer &
Lynch Pin Latch
Release
Zerk 14 & 15 13

13
REMOVAL OF POWER BRUSH FROM
RAPID UNITS
1. Remove washer and lynch pin from Rapid adapter
kit (figure 17).
2. Remove power brush (item 1) from Rapid adapter
kit and double universal joint (item 2).
3. Remove double universal joint (item 2) from Rapid
adapter kit (figure 18).
4. Remove Rapid adapter kit from unit.
REMOVAL OF POWER BRUSH FROM THE
FOUR-WHEEL TRACTOR
1. Remove cotter pin (item 23) and flat washer
(item 22) from the control rod (item 18) at the latch
release (figure 19).
2. Remove knob (item 17) from control rod (item 18).
3. Remove control rod (item 18) from the control rod
bracket (item 21).
4. Remove cotter pin (item 33) and push rod (item 32)
from adapter (item 25) and tractor.
5. Remove the locking collar from the PTO shaft. If the
universal joint has the locking collar that twists,
twist the locking collar in the direction of the arrows
and hold it. Pull the universal joint from the PTO
shaft.
6. Remove the cotter pins from the equipment latches.
Open the equipment latches.
REMOVAL
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
Figure 17
2
1
Rapid Adapter Kit 78510700
Engage
Attachment
Locking Pin
Washer &
Lynch Pin
WARNING: Unintentional startup or contact with
exposed components can cause severe
personal injury. Stop the engine, wait for all
parts to come to a complete stop, remove the
key from the ignition switch, and disconnect the
spark plug wire before performing any
maintenance, installation, removal, or
adjustment.
Figure 18
2
Rapid Adapter Kit 78510700

14
7. Separate the power brush from the tractor. Put the
universal joint on the drive shaft of the power brush.
(figure 10).
8. Keep the push rod, control rod and universal joint
with the power brush.
REMOVAL OF POWER BRUSH FROM THE
GEAR TWO-WHEEL TRACTOR
1. Lower the stand on the tractor to keep the rear of
the tractor from falling to the ground when the
power brush is removed.
2. Remove cotter pin (item 15), flat washer (item 14),
and control rod (item 13) from the latch release
(figure 20).
3. Remove knob (item 9) from the control rod
(item 13).
4. Remove control rod (item 13) from control rod guide
(item 11).
5. Remove the lynch pin and washer from the quick
hitch pin (figure 20).
6. Separate tractor and the power brush. Put the
universal joint on the power brush drive shaft
(figure 15).
WARNING: Unintentional startup or contact with
exposed components can cause severe
personal injury. Stop the engine, wait for all
parts to come to a complete stop, remove the
key from the ignition switch, and disconnect the
spark plug wire before performing any
maintenance, installation, removal, or
adjustment.
Figure 19
22 & 23 18
25
Equipment
Latch Cotter Pin 32
33
Figure 20
QuickHitch
Pin
Pivot Washer &
Lynch Pin Latch
Release
Zerk 14 & 15 13

15
BEFORE EACH USE
Follow all maintenance and adjustments procedures.
See Maintenance on page 16 and Service and
Adjustments on page 17.
OPERATING THE BRUSH
1. Adjust the brush contact area. See Brush Contact
Adjustment on page 17.
2. Start the engine. Wait until the engine is running
smoothly before operating.
3. Adjust the angle of the brush. See Brush Angle
Adjustment on page 17.
4. Move the throttle lever to the fast position.
5. Engage the PTO (power take-off).
6. Place the brush the angle needed and sweep a
distance of 10 feet (3 m). Place the key switch in
the off position, wait for all moving parts to come to
a complete stop and remove the key from the
ignition.
7. Check the cleared area to determine if the brush is
clearing properly. If the brush needs adjustment,
follow the procedures in Service and Adjustments
on page 17.
8. Select the speed that best matches the sweeping
conditions.
SHUTTING OFF
1. Shut off the PTO.
2. Shut off the engine and remove the ignition key.
OPERATION
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.

16
Gravely Dealers will provide any service or adjustments
which may be required to keep your unit operating at
peak efficiency.
MAINTENANCE
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
Interval Task Action
After 4
Hours Adjust the chain. See Chain Adjustment on page 18.
Daily
Check fasteners. Inspect all nuts, bolts and other fasteners to ensure that they are tight.
Replace any missing fasteners. Inspect to ensure that all guards and
covers are in place and securely fastened.
Clean unit. Clear away debris from the brush.
Every
8 hours
Lubricate grease zerks and
pivot. NOTE: There are five grease zerks on the power brush. There is one on each wheel fork, on each caster wheel axle and one on the pivot. There is
also one grease zerk on the universal joint used on the 8000 and 8000-G
Series Tractor.
NOTE: Do not add multipurpose grease to the pivot when the brush is
used on the 8000 or 8000-G Series Tractor.
Every
100
hours
Grease the gearbox. After 100 operating hours, remove the gearbox cover and replace the
multipurpose grease. Use chain lubricant SAE-50 with Paratec or
equivalent to lubricate the chain.
NOTE: Do not damage the gasket on the gearbox cover. If the gasket is
damaged, replace it.
Adjust chain. See Chain Adjustment on page 18.
Grease
Zerk Pivot

17
BRUSH CONTACT ADJUSTMENT
To adjust the brush to ground contact area:
1. Place the brush unit on a level, flat surface.
2. Turn the contact adjustment to the right to decrease
the brush contact area (figure 21.
3. Turn the contact adjustment to the left to increase
the brush contact area.
NOTE: The brush contact area with the ground must be
even across the width of the brush.
BRUSH ANGLE ADJUSTMENT
To adjust the brush angle:
1. Start the engine. Wait until the engine is running
smoothly before operating.
NOTE: Perform steps 2 through 7 for Gear Two-Wheel
Tractors and Four-Wheel Tractors.Perform steps 8
through 11 for Rapid units.
2. Move the throttle to the fast position.
3. Engage the PTO (power take-off).
4. Put the direction control in the forward position.
5. To angle the brush to the right, pull the direction
control rod and steer the unit to the left. Release the
control rod to hold the brush in that position.
6. To angle the brush to the left, pull the control rod
and steer the unit to the right. Release the control
rod to hold the brush in that position.
7. To angle the brush straight, pull the control rod and
steer the unit straight. Release the control rod to
hold the brush in that position.
8. Pull up on the direction control knob and pull the
brush to the right or left.
9. Release direction control knob.
10. Move the throttle to the fast position.
11. Engage the PTO.
SERVICE AND ADJUSTMENTS
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
WARNING: Unintentional startup or contact with
exposed components can cause severe
personal injury. Stop the engine, wait for all
parts to come to a complete stop, remove the
key from the ignition switch, and disconnect the
spark plug wire before performing any
maintenance, installation, removal, or
adjustment.
Figure 21
Contact
Adjustment
Contact
Adjustment
Direction
Control Knob

18
CHAIN ADJUSTMENT
To adjust the power brush drive chain:
IMPORTANT: Adjust the chain after the first four hours of
operation and thereafter adjust every 100 operating
hours.
1. Loosen the nut and move the block against the
chain until the chain is straight at the top. DO NOT
OVERTIGHTEN the chain. Tighten the nut. See
figure 22.
BRUSH REPLACEMENT
To replace the brush element:
1. Disconnect the brush from the unit.
2. Turn the power brush over with the wheels up.
3. Remove the side plate.
4. Remove the connecting link from the chain.
Remove the chain from the sprocket. See figure 23.
5. Remove the bolts from the flangette bearing on
each end of the brush. See figure 24.
6. Remove the brush from the support frame.
7. Loosen the locking collar set screw. Put a punch in
the hole without threads. Hit the punch with a
hammer to turn the locking collar 1/4 turn
counterclockwise.
8. Remove the locking collar and the bearing from the
shaft.
9. Remove the .25 x 2.00 cotter pin and the three
spacers from the shaft. See figure 24.
10. Remove the shaft from the brush.
11. Install the replacement brush on the shaft. Put the
spacers on the shaft and install the .25 x 2.00 cotter
pin.
12. Put the flangette bearing on the shaft with the flat
side toward the brush. Put the locking collar on the
bearing shoulder. DO NOT TIGHTEN THE
LOCKING COLLAR AT THIS TIME.
13. Put the brush in the frame.
14. Fasten the sprocket side flangette bearing to the
support frame first, using the hardware removed in
Step 5.
15. Fasten the opposite flangette bearing to the frame
on the other side.
16. To tighten the locking collar, put a punch in the hole
without the threads. Hit the punch with a hammer,
turning the locking collar clockwise until tight.
17. Put the chain on the sprocket and install the
connecting link and retainer clip.
18. Adjust the chain for tension per the Chain
Tightening instructions.
19. Install the left side plate on the frame using
the.31-18 x.75 hex bolts and nuts.
Figure 22
Nut
Chain
Block
Figure 23
Connecting Link Chain
Connecting
Link Retainer
Figure 24
Brush
Element Flangette
Bearing
Cotter
Pin Brush
Shaft Locking Collar
Shaft
Spacers Flangette
Nut
Flangett
Bolt
Set
Screw
Brush
Frame

19
IMPORTANT: NEVER spray unit with high-pressure
water. DO NOT store unit outdoors.
Clean plastic surfaces with sponge and mild detergent.
Dry with a soft cloth.
Remove all dirt, grease, leaves, etc. from unit.
Store in a clean, dry area.
Ensure all fasteners are properly tightened. Inspect
moving parts for damage and wear.
Touch up all rusted or chipped painted surfaces.
STORAGE
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
TROUBLESHOOTING
Problem Probable Cause Correction
Brush does not sweep the
surface clean. 1.Brush is not level.
2.Brush adjusted to high or low.
3.Driving too fast.
4.Engine speed is to low.
5.Slip clutch out of adjustment (Gear
two-wheel tractor only).
6.Adjust the power brush contact
adjusters. See Brush Contact
Adjustment on page 17.
7.Adjust brush height. See Brush
Contact Adjustment on page 17.
8.Slow down.
9.Increase engine speed.
10.See Gear two-wheel tractor Owner’s
Manual.
Brush leaves strips of material
on surface. 1. Worn or damage brush.
2.Brush is not level.
1. Replace brush. See Brush
Replacement on page 18.
2.Adjust the power brush contact
adjusters. See Brush Contact
Adjustment on page 17.
Brush pulls unit to one side. 1. Brush when angled causes the unit to
pull to one side.
2.Brush not level.
1. This is normal operation when the
brush is angled. No correction is
needed.
2.Adjust the power brush contact
adjusters. See Brush Contact
Adjustment on page 17.
Brush does not operate when
the PTO is engaged. 1. U-joint drive is damaged.
2.Brush gearbox damaged.
3.Brush chain drive needs adjustment
or repair.
4.Unit PTO failure.
1. Replace or repair u-joint drive.
2.Replace or repair brush gearbox.
3.Adjust, replace, or repair chain drive
components. See Chain Adjustment
on page 18 to adjust the chain drive.
4.See unit owner’s manuals.

20
CONTROLS
PARTS LIST
213
4
5
6
18
16
15
17
5
14
7
7
8
9
10
8
9
10
12 11
13
13
19
20
23
22
21