allen 38021 User manual

Diamond Head Grinder
Diamond Head Grinder
OPERATIONS
PARTS MANUAL
BOOK
MM
MMOO
OODD
DDEE
EELL
LL
1
11 HP
1 HP Honda D.H.G
Honda D.H.G
9 HP
9 HP Kawasaki D.H.G
Kawasaki D.H.G # 038021
# 038021
# 032787
# 032787
THIS MANUAL COVERS MACHINES BELOW
Printed 5/02

Diamond Head Grinder
Diamond Head Grinder
OPERATIONS
PARTS MANUAL
BOOK
MM
MMOO
OODD
DDEE
EELL
LL
1
11 HP
1 HP Honda D.H.G
Honda D.H.G
9 HP
9 HP Kawasaki D.H.G
Kawasaki D.H.G # 038021
# 038021
# 032787
# 032787
THIS MANUAL COVERS MACHINES BELOW
Printed 5/02

2002 - 2003 LIMITED W
2002 - 2003 LIMITED WARRANTY
ARRANTY
Allen Engineering Corporation warrants its products to be free of defects in material or workmanship for the fol-
lowing periods:
A. All New Machines and Part 6 Months
B. All New Gear Boxes 2 Years
C. All Factory Reconditioned Gear Boxes 1 Year
Warranty period begins on first day of use by End User. This first day of use is established by a completed war-
ranty card or a Bill of Sale to the end user. All warranty is based on the following limited warranty terms and
conditions.
1. Allen Engineering Corporation’s obligation and liability under this warranty is limited to repairing or replac-
ing parts if, after Allen’s inspection, it is determined to be a defect in material or workmanship. Allen
Engineering Corporation reserves the choice to repair or replace.
2. If Allen Engineering Corporation chooses to replace the part, it will be at no cost to the customer and will
be made available to the Distributor/Dealer from whom the customer purchased the product.
3. Replacement or repair parts, installed in the product, are warranted only for the remainder of warranty peri-
od of the product as though they were the original parts.
4. Allen Engineering Corporation’s warranty applies only to the products that are manufactured by Allen
Engineering and does not cover component parts such as engines and clutches. Allen Engineering
Corporation DOES NOT warranty clutches. Engine warranty claims should be made directly to an author-
ized factory service center for the particular engine make.
5. Allen Engineering Corporation’s warranty does not cover the normal maintenance of products or its compo-
nents (such as engine tune-ups and oil changes). The warranty also does not cover normal wear and tear
items (such as belts and consumables).
6. Allen Engineering Corporation’s warranty will be void if it is determined that the defect resulted from opera-
tor abuse, failure to perform normal maintenance on the product, modification to product, alterations or
repairs made to the product without the written approval of Allen Engineering Corporation. Allen
Engineering Corporation specifically excludes from warranty any damage to any trowels resulting from an
impact to the rotors. Allen Engineering Corporation also excludes from warranty any failure of clutches on
any engine driven piece of equipment.
7. If a new gear box has a factory defect within the first year of use, Allen Engineering Corporation will either
repair the gear box or replace it with a new gear box. If a new gearbox has a factory defect in the second
year of use, Allen Engineering Corporation will either repair it or replace it with a factory reconditioned gear
box. Impact damage is NOT covered under the gear box warranty.
8. Allen engineering Corporation will pay shop labor repair on warranty at the Allen Engineering Shop Labor
Rate in existence on the date of the warranty claim. An Allen Engineering Labor Chart will determine the
time allowed to complete a repair and will govern the shop labor hours that will be allowed.
9. Allen Engineering Corporation will pay freight on warranty replacement parts at Worldwide standard ground
rates. No warranty replacement parts will be shipped air freight at the expense of Allen Engineering
Corporation. Allen Engineering only pays outbound freight charges when sending warranty replacement
parts to the customer VIA ground service. Allen Engineering does not pay any inbound freight, however, if
Allen Engineering determines this to be warranty defect only then will Allen Engineering reimburse the cus-
tomer for inbound freight at standard ground rates.
10. Allen Engineering Corporation’s warranty policy WILL NOT COVER the following; taxes, shop supplies,
environmental surcharges, air freight, travel time, loss of rental revenue, or any other charges whatsoever
or any liabilities for direct, incidental, or consequential damage or delay.
11. Allen Engineering Corporation makes no other warranty, expressed or implied. This limited war-
ranty is in lieu of the warranty of merchantability and fitness. There are no other warranties that
extend beyond the description on this document.
12. No Allen Engineering Corporation employee or representative is authorized to change this warranty in any
way or grant any other warranty unless such change is made in writing and signed by an officer of Allen
Engineering Corporation. 1A-1

1A
OPERATIONS
OPERATIONS
IDENTIFICATION PLATE
An identification plate listing the Model Number and Serial Number is attached to each unit and is located on the lower
right side of the rear panel on the mainframe. The plate should not be removed.
Please record the information found on this plate below so it will be available should the identification plate become lost or
damaged . When ordering parts or requesting service information you will always be asked to specify the model number
and serial number of the unit.
Serial Number:
The serial number found on the identification
plate is a six digit number. The model number
identifies your machine and will ensure that you
receive the correct replacement parts.
123456
Production Sequence
Identification
Plate
Location
FILL IN FOR FUTURE REFERENCES
Model Number:___________________
Serial Number:___________________
Date Purchased:__________________
Purchased From:_________________
________________________________
1A-2
Model Number:
DHG 11HP
Diamond Head Grinder
11 Hp Honda
9 Hp Kawasaki

1A
OPERATIONS Diamond Head Grinder Operating Information
TABLE OF CONTENTS
1.1 Safety Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-6
1.2 Laws Pertaining to Spark Arrestors . . . . . . . . . . . . . . . . . . . . . . . . .1A-6
1.3 Operating Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-7
1.4 Service Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-8
1.5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-8
1.6 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-9
1.7 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-10
1.8 Before Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-10
1.9 Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-10
1.10 Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-11
1.11 Periodic Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-12
1.12 Battery Jump Start Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A-13
This machine is built with user safety in mind. However, it can present hazards if
improperly operated and serviced. Follow operating instructions carefully!
If you have any questions about operating or servicing this equipment please contact
your Allen Engineering Distributor or Allen Engineering Corp. Customer Service at 1-
800-643-0095 or 1-870-236-7751.
1A-3

1A
OPERATIONS
Important Reminder
Complete any warranty requirements as specified by the engine manufacturer in their instructions found inside
the battery box.
Your engine is not manufactured by Allen Engineering Corp., and therefore is not covered under Allen
Engineering warranty.
Your engine manufacturer should be contacted if you wish to purchase a parts manual or a repair manual for
your engine.
Refer to enclosed owners engine manual for complete O&M instructions. See your battery manufacturer for
battery warranty.
Your Distributor
Your Distributor has Allen Engineering trained mechanics and original Allen Engineering replacement parts.
Always contact the Allen Engineering Distributor who sold you this machine for Allen Engineering Certified
repairs and replacement parts.
Place distributor information here for future reference.
DISTRIBUTOR NAME PHONE NUMBER
ADDRESS
CITY STATE ZIP
SALESMAN
ADDITIONAL INFORMATION
1A-4

1A
OPERATIONS THE INFORMATION CONTAINED IN THIS MANUAL WAS BASED UPON THE MACHINES
IN PRODUCTION AT THE TIME (BEGINNING WITH SERIAL NUMBER 040102) OF PUBLI-
CATION. ALLEN ENGINEERING RESERVES THE RIGHT TO CHANGEANY PORTION OF
THIS DOCUMENT WITHOUT NOTIFICATION.
Information Contained in This Manual
Ordering Parts
This manual contains an illustrated parts list for help in ordering replacement parts for your machine. Follow
the instructions listed below when ordering parts to ensure prompt and accurate delivery. All orders for parts
must be made through your local authorized Allen Engineering dealer. All authorized Allen Engineering deal-
ers must fax a copy of the parts order to customer service. The fax number is (870) 236-3934). Facsimile
orders must contain the following information:
1. On all orders for service parts include SERIAL NUMBER and MODEL number.
2. Shipment may be delayed if this information is not included.
3. Include correct description and part number from part section 2A.
4. State exact shipping instructions including preferred routing and complete destination
address. Also please indicate your preferred freight carrier. If no freight carrier is
indicated Allen Engineering reserves the right to ship the shipment the best way
possible. Once a shipment leaves Allen Engineering’s docks it becomes the
responsibility of the freight carrier to insure that it arrives at it’s intended
destination.
5. DO NOT return parts to Allen Engineering without receiving written authorized Customer
Service Report(CSR) from Allen Engineering. All authorized returns must bee shipped pre-
paid. All unauthorized returns will be shipped back to the addressee at their expense.
Keep this manual or a copy of it with the machine. If you loose this manual or need an additional copy
please contact your Allen distributor or Allen Engineering Corporation at (800) 643-0095 and order lit-
erature part number 042526.
Copyright®2002 Allen Engineering Corp.
All Rights Reserved -- Contents Subject to
Change Without Prior Notice.
This manual provides information and procedures to safely operate and maintain the Allen Engineering
Diamond Head Grinders.
For your own safety and protection from personal injury carefully read, understand and observe the safety
instructions described in this manual.
Always operate and maintain this machine in accordance with the instructions described in this manual. A well
maintained piece of equipment will provide many years of trouble free operation. This manual is divided into the
sections listed below.
1A-5
1A
OPERATIONS 2A
PARTS

1A
OPERATIONS
1.1 Safety Notes
This manual contains NOTES, CAUTIONS and WARNINGS which must be followed to reduce the possibility of
improper service damage to the equipment or personal injury. Read and follow all NOTES, CAUTIONS and
WARNINGS included in this manual.
NOTE Contains additional information important to a procedure.
CAUTION Provides information important to prevent errors which could damage machine or components.
WARNING Warns of conditions or practices which could lead to personal injury or death.
1.2 Laws Pertaining to Spark Arrestors
Notice: Some states require that in certain locations arrestors be used on internal combustion engines. Aspark
arrester is a device designed to prevent the discharge of spark or flames from the engine exhaust. It
is often required when operating equipment on forested land to prevent the risk of fires. Consult the
engine distributor or local authorities and make sure that you comply with regulations regarding spark
arrestors.
1A-6

1A
OPERATIONS
1.3 Operating Safety
Familiarity and proper training are required for the safe operation of this equipment! Equipment operated prop-
erly or by untrained personnel can be dangerous! Read the operating instructions contained in both this man-
ual and the engine manual and familiarize yourself with the location and proper use of all controls.
Safety Precautions
1. Read operating and safety instructions before using the Diamond Head Grinder.
Operate the machine in accordance with the manufacturer's instructions.
2. Inspect your D.H.G. for damage or tampering that can sometimes occur
during shipping.
3. If damage is found file a claim with your carrier immediately! Mark freight bill of
lading as damaged shipment.
4. Do not operate D.H.G. if any guards have been removed or if the "safety
switch" is not operational.
5. Only trained personnel should be allowed to operate your D.H.G.
6. Do not attempt to fill fuel tank or oil sump while the engine is running. Allow engine to
cool before refueling.
7. Never attempt to operate the D.H.G. on steep inclined surfaces.
8. Do not use over the counter hardware to replace manufacturer's hardware.
9. WARNING: When operating machines with gas engines in confined areas. The
fumes MUST be ventilated!
10. Always wear safety goggles, ear protection, and gloves when operating the D.H.G.
1A-7

1A
OPERATIONS
1.4 Service Safety
Poorly maintained equipment can become a safety hazard! In order for the equipment to operate safely and
properly over a long period of time, periodic maintenance and occasional repairs are necessary.
DO NOT attempt to clean or service machine while it is running. Rotating parts can cause severe injury.
DO NOT crank a flooded engine with the spark plug removed. Fuel trapped in the cylinder will squirt out the
spark plug opening.
DO NOT test for spark if engine is flooded or the smell of gasoline is present . A stray spark could ignite the
fumes.
DO NOT use gasoline or other types of fuels or flammable solvents to clean parts especially in
enclosed areas. Fumes from fuels and solvents can become explosive and can be hazardous to
your health.
ALWAYS operate machine with all safety devices and guards in place and in working order.
ALWAYS keep area around muffler free of debris such as leaves, paper, cartons, etc. A hot muffler could
ignite such items starting a fire.
ALWAYS replace worn or damaged components with spare parts designed and recommended by ALLEN
ENGINEERING.
ALWAYS disconnect battery on machines before servicing to avoid accidental start-up.
ALWAYS use water when wet cutting.
ALWAYS make sure grinding disc is clear of the ground before starting engine.
1.5 Dimensions
26-1/2”
673 mm
45”
1143 mm
39”
991 mm
1A-8

1A
OPERATIONS
1.6 Technical Data
Engine Make & Model Honda 11HP V340K
Rated Power . . . . . . . . . . . . . . . . . . . . . . . .HP (kW) . . . . . . . . . . . . . . . .11(8.20)
Piston Displacement . . . . . . . . . . . . . . . . . .cu. in. (cc) . . . . . . . . . . . . . . .20.6 (337)
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . .type . . . . . . . . . . . . . . . . . . . .Champion RC 12 YC
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . .volts . . . . . . . . . . . . . . . . . . .12
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . .gal. (L) . . . . . . . . . . . . . . . . .1 (3.785)
Engine Oil Capacity . . . . . . . . . . . . . . . . . . .US qt. (L) . . . . . . . . . . . . . . .2 (1.9)
Engine Lubrication . . . . . . . . . . . . . . . . . . . .Oil Grade . . . . . . . . . . . . . . .SAE10W30 SG SF/CC,CD
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lbs. (kg) . . . . . . . . . . . . . . . . .68.4 (31)
Engine Make & Model Kawasaki 9HP FC290V
Rated Power . . . . . . . . . . . . . . . . . . . . . . . .HP (kW) . . . . . . . . . . . . . . . .9(8.20)
Piston Displacement . . . . . . . . . . . . . . . . . .cu. in. (cc) . . . . . . . . . . . . . . .17.5 (286)
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . .type . . . . . . . . . . . . . . . . . . . .Champion RC 12 YC
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . .volts . . . . . . . . . . . . . . . . . . .12
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . .gal. (L) . . . . . . . . . . . . . . . . ..58 (2.2)
Engine Oil Capacity . . . . . . . . . . . . . . . . . . .US qt. (L) . . . . . . . . . . . . . . .1.2 (1.1)
Engine Lubrication . . . . . . . . . . . . . . . . . . . .Oil Grade . . . . . . . . . . . . . . .SAE10W30 SG SF/CC,CD
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lbs. (kg) . . . . . . . . . . . . . . . . .57.3 (26)
Machine Specifications D.H.G.
Length w/ Handle . . . . . . . . . . . . . . . . . . . . .in. (cm) . . . . . . . . . . . . . . . . .45 (114) Honda
Length w/ Handle . . . . . . . . . . . . . . . . . . . . .in. (cm) . . . . . . . . . . . . . . . . .40 (102) Kawasaki
Width w/ Handle . . . . . . . . . . . . . . . . . . . . . .in. (cm) . . . . . . . . . . . . . . . . .26½ (67)
Height at Handle . . . . . . . . . . . . . . . . . . . . .in. (cm) . . . . . . . . . . . . . . . . .39 (99)
Operating Weight . . . . . . . . . . . . . . . . . . . . .lbs. (kg) . . . . . . . . . . . . . . . . .264 (120) Honda
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lbs. (kg) . . . . . . . . . . . . . . . . .228 (103) Kawasaki
Electric Start . . . . . . . . . . . . . . . . . . . . . . . . .Honda . . . . . . . . . . . . . . . . . .Yes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Kawasaki . . . . . . . . . . . . . . .No
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Honda . . . . . . . . . . . . . . . . . .Yes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Kawasaki . . . . . . . . . . . . . . .No
Engine Speed . . . . . . . . . . . . . . . . . . . . . . . .RPM . . . . . . . . . . . . . . . . . . .3600
Max. Grinding Disc Speed (unloaded) . . . . .RPM . . . . . . . . . . . . . . . . . . .1710
1A-9

1A
OPERATIONS
1.7 Description
The Razorback®Diamond Head Grinder is an aggressive grinding machine that will reduce concrete levels
and leave a smooth surface. Because concrete grinding usually involves penetrating into the aggregate, this
grinder’s heavy duty design and high horsepower will finish jobs faster than any other grinders. The 11HP
Honda Powered unit is equipped with electric start and a light. The Razorback®Diamond Head Grinder is
also available with a 9HP Kawasaki gasoline engine. Both models use a 10” diameter disc with 20 diamond
segments and are ideal for grinding bumps or high spots on floors, as well as areas along construction joints
that have curled. Its speed on these types of jobs is unsurpassed! Both models also feature a height adjust-
ment device that prevents over-cutting and a water hook-up to increase diamond disc life.
1.8 Before Starting
Remove spark plug lead on gas engine. Tilt the machine back onto its handle. Remove the four mounting bolts
and fit the grinding disc. Replace the four bolts and make sure they are tight. Lower machine back into an
upright position. Replace the spark plug lead. Before starting engine, check all oil levels and make sure filter
is clean.
Before starting D.H.G. check the following:
*Oil level in engine:
* Fuel level:
*Condition of diamond disc:
*Condition of all fasteners on disc:
*Grease machine daily:
1.9 Starting
Before starting trowel refer to pictures below for location and identification of controls.
1. Turn key to the start-position. immediately release key when engine starts. If after two or
three attempts the engine has not started push in choke. This will open the choke. Attempt to
start machine again. Allow engine to warm up before operating.
Caution: Operating the starter for more than 5 seconds can damage the starter or engine. If engine fails to
start release the switch and wait 10 seconds before operating starter again.
LIGHT SWITCH
KEY SWITCH
1A-10
CHOKE

1A
OPERATIONS
1.10 Operating
Make sure that the foot pedal is fully depressed and locked into position before starting the engine. Connect
the water supply to the hose adaptor fitting if wet cutting. Start the engine, the grinding head will now rotate.
Turn on the water supply for wet cutting. Unlock the foot pedal and allow it to slowly travel up the slot in the
back of the machine. This lowers the grinding head into position. Adjust the height adjustment assembly at the
front of the machine to acquire the correct depth of cut. To utilize yourAllen Engineering Razorback®Diamond
Head Grinder to its fullest capacity the machine should be moved in an oscillating fashion. In other words,
move the machine backwards and forwards at the acquired depth until it doesn’t cut anymore, then move for-
ward. For example, if you want to cut 1/4” into the concrete, do not set the depth of the disc to cut all of this at
once. It is much easier on the operator and the machine to do a little at a time. In this case an 1/8” would be
good and make two passes.
1A-11
Oscillate Back and Forth
Disc Adjustment Knob
Turn clockwise to lower and
counter-clockwise to raise.

1A
OPERATIONS
1.11 Periodic Maintenance Schedule
The chart below list basic machine and engine maintenance. Refer to engine manufacturer's Operation Manual
for additional information on engine maintenance. A copy of the engine Operator's Manual was supplied with
the machine when it was shipped.
DAILY EVERY 20 EVERY 50 EVERY 100 EVERY 300
HOURS HOURS HOURS HOURS
CHECK FUEL LEVEL X
INSPECT AIR FILTERS X
REPLACE AS NEEDED
CHECK AND TIGHTEN X
EXTERNAL HARDWARE
CHECK DRIVE BELTS X
CHECK VALVE CLEARANCE X
CHANGE ENGINE OIL X
REPLACE OIL FILTERS X
REPLACE SPARK PLUG X
CLEAN AIR FILTER X
GREASE HEAD BEARINGS X
1A-12

1A
OPERATIONS
1A-13
1.12 Battery Jump Start Procedure
Occasionally it may be necessary to jump start a weak battery. If jump starting is necessary the following pro-
cedure is recommended to prevent starter damage, battery damage, and personal injury.
Warning: Jump starting a battery incorrectly can cause the battery to explode resulting in severe personal
injury or death. Do not smoke or allow any ignition sources near the battery and do not jump
start a frozen battery.
Warning: Electrical arcing can cause severe personal injury. Do not allow positive and negative cable ends
to touch.
1. Use a battery of the same voltage (12V) as is used with your engine.
3. Attach one end of the positive booster cable (red) to the positive (+) terminal of the booster battery. Attach
the other end of the terminal of your engine battery.
4. Attach one end of the negative booster cable (black) to the negative (-) terminal on the booster. Attach the
other end of the negative cable to your engine battery.
5. Jump starting in any other manner may result in damage to the battery or the electrical system.
Caution: Over cranking the engine can cause starter damage. Allow 5 minutes for starter to cool if
engaged for more than 15 seconds.

1A-1
2A
PARTS
Diamond Head Grinder Parts Information
TABLE OF CONTENTS
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-1
2.1 Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-2
2.2 Lower Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-3
2.3 Handle Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-4
2.4 Ball Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-5
2.5 Wheel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-6
2.6 Drive Line Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-7
2.7 Electrical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-8
2.8 Water Adaptor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-8
This machine is built with user safety in mind. However, it can present hazards if
improperly operated and serviced. Follow operating instructions carefully!
If you have any questions about operating or servicing this equipment please contact
your Allen Engineering Distributor or Allen Engineering Corp. Customer Service at 1-
800-643-0095 or 1-870-236-7751.

2A
PARTS 2.1 Frame Assembly
2A-2
ILL. PART # DESCRIPTION QTY.
1. . . . . . . . . . . . . . . . . . . . . .021325 . . . . . . . . .SUB FRAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2. . . . . . . . . . . . . . . . . . . . . .028396 . . . . . . . . .FOOT PLATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3. . . . . . . . . . . . . . . . . . . . . .021139 . . . . . . . . .RUBBER SKIRT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
4. . . . . . . . . . . . . . . . . . . . . .021140 . . . . . . . . .GRINDING HEAD GUARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
5. . . . . . . . . . . . . . . . . . . . . .039420 . . . . . . . . .PLATE, ELECTRIC ENGINE ADAPTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
6. . . . . . . . . . . . . . . . . . . . . .021135 . . . . . . . . .HOUSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
7. . . . . . . . . . . . . . . . . . . . . .021111 . . . . . . . . .FRAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
8. . . . . . . . . . . . . . . . . . . . . .036429 . . . . . . . . .BRACKET, WATER HOSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
9. . . . . . . . . . . . . . . . . . . . . .021141 . . . . . . . . .DRIVE GUARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
10. . . . . . . . . . . . . . . . . . . . .038071 . . . . . . . . .BATTERY BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
11. . . . . . . . . . . . . . . . . . . . .021130 . . . . . . . . .SECOND WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
12. . . . . . . . . . . . . . . . . . . . .021143 . . . . . . . . .FIRST WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
13. . . . . . . . . . . . . . . . . . . . .019295 . . . . . . . . .BATTERY, 12 VOLT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
14. . . . . . . . . . . . . . . . . . . . .038075 . . . . . . . . .BATTERY STRAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
15. . . . . . . . . . . . . . . . . . . . .029388 . . . . . . . . .RUBBER LATCH CLAMP ASSEMBLY (NOT SHOWN) . . . . . . . . . . . . . . . . . . .1
16. . . . . . . . . . . . . . . . . . . . .024981 . . . . . . . . .SPRING, FOOT PLATE (NOT SHOWN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
17. . . . . . . . . . . . . . . . . . . . .099297 . . . . . . . . .ROLL PIN, 5/16 x 2-1/2 (NOT SHOWN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
18. . . . . . . . . . . . . . . . . . . . .038118 . . . . . . . . .MOTOR MOUNT BOLT (NOT SHOWN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2A-3
2A
PARTS
2.2 Lower Unit Assembly
ILL. PART # DESCRIPTION QTY.
1. . . . . . . . .028399 . . . . . . .DIAMOND DISC . . . . . . . . . . . . . . . . .1
2. . . . . . . . .021105 . . . . . . .DRIVE PLATE . . . . . . . . . . . . . . . . . .1
3. . . . . . . . .037531 . . . . . . .COUPLING, RUBBER . . . . . . . . . . . .1
4. . . . . . . . .021104 . . . . . . .DRIVE SHAFT . . . . . . . . . . . . . . . . . .1
5. . . . . . . . .021109 . . . . . . .BEARING SEAL . . . . . . . . . . . . . . . . .2
6. . . . . . . . .021108 . . . . . . .BEARING . . . . . . . . . . . . . . . . . . . . . .2
7. . . . . . . . .021107 . . . . . . .BEARING CUP . . . . . . . . . . . . . . . . . .2
8. . . . . . . . .034073 . . . . . . .BEARING HOUSING . . . . . . . . . . . . .1
9. . . . . . . . .021352 . . . . . . .DISTANCE PIECE . . . . . . . . . . . . . . .1
10. . . . . . . .021348 . . . . . . .FLANGE / ELBOW ASSEMBLY . . . . .1
11. . . . . . . .021358 . . . . . . .LOCKNUT (NOT SHOWN) . . . . . . . .1
12. . . . . . . .021359 . . . . . . .TAB WASHER (NOT SHOWN) . . . . .1
13. . . . . . . .021361 . . . . . . .CIRCLIPS (NOT SHOWN) . . . . . . . . .2
14. . . . . . . .034392 . . . . . . .PIPE NIPPLE 1/8 x 5 (NS) . . . . . . . . .1
15. . . . . . . .010333 . . . . . . .PIPE COUPLING (NS) . . . . . . . . . . . .1

2A
PARTS
2A-4
2.3 Handle Assembly
ILL. PART # DESCRIPTION QTY.
1. . . . . . . . . . . . . . . . . . .037668 . . . . . . .HAND GRIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2. . . . . . . . . . . . . . . . . . .021112 . . . . . . .HANDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3. . . . . . . . . . . . . . . . . . .038076 . . . . . . .CONTROL PANEL BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
4. . . . . . . . . . . . . . . . . . .038935 . . . . . . .HANDLE CLIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2A
PARTS
2A-5
2.4 Ball Unit Assembly
ILL. PART # DESCRIPTION QTY.
1. . . . . . . . . . . . . . . . . . .028589 . . . . . . .BALL UNIT ROLLER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2. . . . . . . . . . . . . . . . . . .021135 . . . . . . .HOUSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3. . . . . . . . . . . . . . . . . . .038079 . . . . . . .LIGHT MOUNT PLATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
4. . . . . . . . . . . . . . . . . . .021333 . . . . . . .WRENCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
5. . . . . . . . . . . . . . . . . . .028404 . . . . . . .NUT, 16mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
6. . . . . . . . . . . . . . . . . . .035685 . . . . . . .SHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
7. . . . . . . . . . . . . . . . . . .021133 . . . . . . .BEARING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
8. . . . . . . . . . . . . . . . . . .035684 . . . . . . .ADJUSTMENT HANDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
9. . . . . . . . . . . . . . . . . . .028749 . . . . . . .LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
10. . . . . . . . . . . . . . . . . .021331 . . . . . . .COVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
11. . . . . . . . . . . . . . . . . .018289 . . . . . . .ROLL PIN, 3/16 x 1 1/4 (NOT SHOWN) . . . . . . . . . . . . . . . . . . . . . . .1
12. . . . . . . . . . . . . . . . . .021137 . . . . . . .BALL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
This manual suits for next models
1
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