John Deere Grinder ET 3302 J User Manual

ET-3302-J 7-INCH  
GRINDER  
CAUTION  
RISK OF INJURY!  
READ MANUAL BEFORE OPERATING!  
THIS MANUAL IS AN IMPORTANT PART OF THE DISC GRINDER  
AND SHOULD REMAIN WITH THIS UNIT WHEN YOU SELL OR RENT IT.  
 
Table of Content  
SAFETY .................................................................................................................. 4-10  
GENERAL SAFETY RULES .................................................................. 4-10  
FUNCTIONAL DESCRIPTION............................................................................... 11  
MODEL ................................................................................................... 11  
NAME OF PARTS .................................................................................. 11  
SPECIFICATIONS ................................................................................. 11  
ASSEMBLY ............................................................................................................ 12  
OPERATION........................................................................................................... 13-15  
APPLICATIONS ..................................................................................... 13  
PRE-OPERATION ................................................................................. 13-14  
OPERATION .......................................................................................... 14-15  
MAINTENANCE AND INSPECTION ..................................................................... 16-17  
MAINTENANCE AND INSPECTION ..................................................... 16  
SERVICE AND REPAIRS ...................................................................... 17  
STANDARD ACCESSORIES ................................................................ 17  
NOTES ................................................................................................................... 18-19  
7-Inch Disc Grinder Operator's Manual  
3
 
Safety  
RECOGNIZE SAFETY INFORMATION  
This is the safety alert symbol. When you see this symbol on  
your tool or in this manual, be alert to the potential for  
personal injury.  
Follow recommended precautions and safe operating  
practices.  
UNDERSTAND SIGNAL WORDS  
A "DANGER, WARNING or CAUTION" safety warning will be  
surrounded by a "SAFETY ALERT BOX." This box is used to  
designate and emphasize Safety Warnings that must be  
followed when operating this tool.  
Accompanying the Safety Warnings are "signal words" which  
designate the degree or level of hazard seriousness. The  
"signal words" used in this manual are as follows:  
DANGER: Indicates an imminently hazardous situation  
which, if not avoided, WILL result in death or  
serious injury.  
WARNING: Indicates a potentially hazardous situation  
which, if not avoided, COULD result in death or  
serious injury.  
CAUTION: Indicates a potentially hazardous situation  
which, if not avoided MAY result in minor or  
moderate injury.  
GENERAL SAFETY RULES  
WARNING: Read and understand all  
instructions.  
Failure to follow all  
instructions listed below, may  
result in electric shock, fire and/  
or serious personal injury.  
SAVE THESE INSTRUCTIONS  
4
7-Inch Disc Grinder Operator's Manual  
 
WARNING  
NEVER TOUCH MOVING PARTS  
Never place your hands, fingers or other body parts  
near the tool’s moving parts.  
NEVER OPERATE WITHOUT ALL GUARDS IN  
PLACE  
Never operate this tool without all guards or safety  
features in place and in proper working order. If  
maintenance or servicing requires the removal of a  
guard or safety feature, be sure to replace the guard or  
safety feature before resuming operation of the tool.  
ALWAYS WEAR EYE AND EAR PROTECTION  
Protect yourself from flying or expelled wood chips,  
metal particles or other debris by using protective  
goggles or equivalent eye protector. Wear ear protector  
to protect yourself from excessive noise.  
PROTECT YOURSELF AGAINST ELECTRIC SHOCK  
Prevent body contact with grounded surfaces such as  
pipes, radiators, ranges and refrigeration enclosures.  
Never operate the tool in damp or wet locations.  
DISCONNECT TOOLS  
Never leave the tool connected to a power source.  
Always disconnect the tool from its power source  
before servicing, inspecting, maintaining, cleaning and  
before changing or checking any parts.  
AVOID UNINTENTIONAL STARTING  
Don’t carry the tool while it is connected to its power  
source. Don’t carry the tool with your finger near the  
power switch. Be sure the power switch is in the “off”  
position before connecting the tool to its power source.  
CONSIDER WORK AREA ENVIRONMENT  
Don’t expose power tools to rain. Don’t use power tools  
in damp or wet locations. Keep work area well lit and  
well ventilated.  
Don’t use tool in presence of flammable liquids or  
gases.  
Power tools produce sparks during operation. They  
also spark when switching ON/OFF. Never use power  
tools in sites containing lacquer, paint, benzine,  
thinner, gasoline, gases, adhesive agents, and other  
materials which are combustible or explosive.  
KEEP CHILDREN AWAY  
Do not let visitors contact tool or extension cord.  
All visitors should be kept safely away from work area.  
7-Inch Disc Grinder Operator's Manual  
5
 
WARNING  
DRESS PROPERLY  
Do not wear loose clothing or jewelry. They can be caught in moving parts.  
Rubber gloves and non-skid footwear are recommended when working outdoors.  
Wear protective hair covering to contain long hair.  
USE FACE, DUST MASK OR RESPIRATOR IF OPERATION IS DUSTY  
All persons in the area where power tools are being operated should also wear face,  
dust mask or respirator.  
SECURE WORK  
Use clamps or a vise to hold work. It’s safer than using your hand and it frees both  
hands to operate tool.  
DON’T OVERREACH  
Keep proper footing and balance at all times.  
STAY ALERT  
Watch what you are doing. Use common sense. Do not operate tool when you are  
tired.  
Tools should never be used by you if you are under the influence of alcohol, drugs or  
medication that makes you drowsy.  
HANDLE TOOL CORRECTLY  
Operate the tool according to the instructions provided herein. Do not drop or throw  
the tool. Never allow the tool to be operated by children, individuals unfamiliar with its  
operation or unauthorized personnel.  
CHECK FOR LIVE WIRES  
Avoid the risk of severe electrical shock by checking for live electrical wires that may  
be buried in walls, floors or ceilings. The circuit to the wires should be disconnected  
before work begins.  
DO NOT USE POWER TOOLS IF THE PLASTIC HOUSING OR HANDLE IS  
CRACKED  
Cracks in the tool’s housing or handle can lead to electric shock. Such tools should  
not be used until repaired.  
BLADES AND ACCESSORIES MUST BE SECURELY MOUNTED TO THE TOOL  
Prevent potential injuries to youself or others. Blades, cutting implements and  
accessories which have been mounted to the tool should be secure and tight.  
NEVER LEAVE TOOL RUNNING UNATTENDED  
Turn power off. Don’t leave tool until it comes to a complete stop.  
6
7-Inch Disc Grinder Operator's Manual  
 
CAUTION  
STORE TOOL PROPERLY  
When not in use, the tool should be stored in a dry place. Keep out of reach of children.  
Lock-out the storage area.  
KEEP WORK AREA CLEAN  
Cluttered areas and benches invite injuries. Clear all work areas and work benches of  
unnecessary tools, debris, furniture, etc.  
DON’T FORCE TOOL  
It will do the job better and safer at the rate for which it was intended.  
USE RIGHT TOOL  
Don’t force small tool or attachment to do the job of a heavy-duty tool. Don’t use tool for  
purpose not intended —for example— don’t use circular saw for cutting tree limbs or logs.  
DON’T ABUSE CORD  
Never carry tool by cord or yank it to disconnect from receptacle. Keep cord from heat, oil  
and sharp edges.  
SECURE WORK  
Use clamps or a vise to hold work. It's safer than using your hand and it frees both hands  
to operate tool.  
MAINTAIN TOOLS WITH CARE  
Keep tools sharp and clean for better and safer performance. Follow instructions for  
lubricating and changing accessories. Inspect tool cords periodically and if damaged,  
have repaired by an authorized dealer. Inspect extension cords periodically and replace if  
damaged. Keep handles dry, clean, and free from oil and grease.  
REMOVE ADJUSTING KEYS AND WRENCHES  
Keys and adjusting wrenches remove from tool before turning it on.  
OUTDOOR USE EXTENSION CORD  
When tool is used outdoors, use only extension cord intended for use outdoors and so  
marked.  
CHECK DAMAGED PARTS  
Before further use of the tool, a guard or other part that is damaged should be carefully  
checked to determine that it will operate properly and perform its intended function.  
Check for alignment of moving parts, binding of moving parts, breakage of parts,  
mounting, and any other conditions that may affect its operation.  
A guard or other part that is damaged should be properly repaired or replaced by an  
authorized dealer unless otherwise indicated elsewhere in this Instruction Manual. Have  
defective switches replaced by the authorized dealer. Do not use tool if switch does not  
turn it on and off.  
NEVER USE A POWER TOOL FOR APPLICATIONS OTHER THAN THOSE  
SPECIFIED  
Never use a power tool for applications other than those specified in the Instruction  
Manual.  
7-Inch Disc Grinder Operator's Manual  
 
7
CAUTION  
HANDLE TOOL CORRECTLY  
Operate the tool according to the instructions provided herein. Do not drop or throw  
the tool. Never allow the tool to be operated by children, individuals unfamiliar with its  
operation or unauthorized personnel.  
KEEP ALL SCREWS, BOLTS AND COVERS TIGHTLY IN PLACE  
Keep all screws, bolts, and plates tightly mounted. Check their condition periodically.  
KEEP MOTOR AIR VENT CLEAN  
The tool’s motor air vent must be kept clean so that air can freely flow at all times.  
Check for dust build-up frequently.  
OPERATE POWER TOOLS AT THE RATED VOLTAGE  
Operate the power tool at voltages specified on its nameplate.  
If using the power tool at a higher voltage than the rated voltage, it will result in  
abnormally fast motor revolution and may damage the unit and the motor may burn  
out.  
NEVER USE A TOOL WHICH IS DEFECTIVE OR OPERATING ABNORMALLY  
If the tool appears to be operating unusually, making strange noises, or otherwise  
appears defective, stop using it immediately and arrange for repairs by a JOHN  
DEERE AUTHORIZED DEALER.  
CAREFULLY HANDLE POWER TOOLS  
Should a power tool be dropped or struck against hard materials inadvertently, it may  
be deformed, cracked, or damaged.  
DO NOT WIPE PLASTIC PARTS WITH SOLVENT  
Solvents such as gasoline, thinner benzine, carbon tetrachloride, and alcohol may  
damage and crack plastic parts. Do not wipe them with such solvents.  
Wipe plastic parts with a soft cloth lightly dampened with soapy water and dry  
thoroughly.  
USE ONLY GENUINE JOHN DEERE REPLACEMENT PARTS  
Replacement parts not manufactured by JOHN DEERE may void your warranty and  
can lead to malfunction and resulting injuries. Genuine JOHN DEERE parts are  
available from your dealer.  
POLARIZED PLUGS  
To reduce the risk of electric shock, this equipment has a polarized plug (one blade is  
wider than the other).  
This plug will fit in a polarized outlet only one way.  
If the plug does not fit fully in the outlet, reverse the plug.  
If it still does not fit, contact a qualified electrician to install the proper outlet.  
Do not change the plug in any way.  
USE ONLY GRINDING WHEELS HAVING A MAXIMUM OPERATING SPEED AT  
LEAST HIGH AS 6600 RPM.  
8
7-Inch Disc Grinder Operator's Manual  
 
CAUTION  
USE OF EXTENSION CORD  
Make sure your extension cord is in good condition. When using an extension cord, be  
sure to use one heavy enough to carry the current your product will draw.  
An undersized cord will cause a drop in line voltage resulting in loss of power and  
overheating. Table shows the correct size to use depending on cord length and  
nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage  
number, the heavier the cord.  
MINIMUM GAGE FOR CORD SETS  
Total Length of Cord in Feet (Meter)  
0 – 25  
26 – 50  
51 – 100  
101 – 150  
(0 – 7.6)  
(7.9 – 15.2)  
(15.5 – 30.5) (30.8 – 45.7)  
Ampere Rating  
AWG  
More  
Than  
Not More  
Than  
0 – 6  
18  
18  
16  
14  
16  
16  
16  
12  
16  
14  
14  
14  
12  
12  
6 – 10  
10 – 12  
12 – 16  
Not Recommended  
WARNING:  
AVOID ELECTRICAL SHOCK HAZARD. NEVER USE THIS  
TOOL WITH A DAMAGED OR FRAYED ELECTRICAL CORD  
OR EXTENSION CORD.  
INSPECT ALL ELECTRICAL CORDS REGULARLY. NEVER  
USE IN OR NEAR WATER OR IN ANY ENVIRONMENT WHERE  
ELECTRIC SHOCK IS POSSIBLE.  
DOUBLE INSULATION FOR SAFER OPERATION  
To ensure safer operation of this power tool, JOHN DEERE has adopted a double  
insulation design. “Double insulation “ means that two physically separated insulation  
systems have been used to insulate the electrically conductive materials connected to  
the power supply from the outer frame handled by the operator. Therefore, either the  
symbol “ ” or the words “Double insulation” appear on the power tool or on the  
nameplate.  
Although this system has no external grounding, you must still follow the normal  
electrical safety precautions given in this Instruction Manual, including not using the  
power tool in wet environments.  
To keep the double insulation system effective, follow these precautions:  
a. Only a AUTHORIZED JOHN DEERE DEALER should disassemble or  
assemble this power tool, and only genuine JOHN DEERE replacement  
parts should be installed.  
b. Clean the exterior of the power tool only with a soft cloth moistened with  
soapy water, and dry thoroughly. Never use solvents, gasoline or thinners  
on plastic components; otherwise the plastic may dissolve.  
7-Inch Disc Grinder Operator's Manual  
9
 
IMPORTANT  
IMPORTANT SAFETY INSTRUCTIONS FOR USE OF THE DISC  
GRINDER  
WARNING:  
DEATH OR SERIOUS BODILY INJURY COULD RESULT FROM  
IMPROPER OR UNSAFE USE OF THE DISC GRINDER.  
1. NEVER operate the disc grinder without its wheel guard in place.  
2. NEVER place hands or body parts near the disc during operation.  
3. NEVER use a grinding wheel which is cracked or deformed or worn away.  
4. NEVER use a grinding wheel with an RPM rating which is less than  
6600 RPM. The wheel can disintegrate during use and cause severe injuries.  
5. NEVER use the grinder in places where the sparks generated by the grinder can  
cause explosion, such as where flammable materials or gases are present.  
6. ALWAYS wear eye protection that meets the requirement of the latest revision of  
ANSI Standard Z87.1.  
7. ALWAYS wear a mask or respirator to protect yourself from dust or potentially  
harmful particles generated during the grinding operation.  
8. ALWAYS firmly grip the body handle and side handle while operating the grinder.  
9. ALWAYS follow the instructions contained in this manual when replacing the  
grinding wheel.  
REPLACEMENT PARTS  
When servicing use only identical replacement parts.  
Repairs should be conducted only by an AUTHORIZED JOHN DEERE DEALER.  
SAVE THESE INSTRUCTIONS AND MAKE THEM AVAILABLE TO  
OTHER USERS AND OWNERS OF THIS TOOL!  
10  
7-Inch Disc Grinder Operator's Manual  
 
Functional Description  
MODEL:  
ET-3302-J 7-INCH DISC GRINDER  
NOTE: The information contained in this Instruction Manual is designed to assist  
you in the safe operation and maintenance of the power tool.  
NEVER operate, or attempt any maintenance on the tool unless you have first read  
and understood all safety instructions contained in this manual.  
Some illustrations in this Instruction Manual may show details or attachments that  
differ from those on your own power tool.  
NAME OF PARTS:  
(Fig. 1)  
SPECIFICATIONS:  
7-INCH DISC GRINDER ET-3302-J:  
Motor  
Single-Phase Series; Wound Commutator Motor  
Power Source  
Input  
Single-Phase 115V AC 60Hz  
1, 640W  
No-Load Speed (USA)  
No-Load Speed (Canada)  
6, 000 rpm  
8, 500 rpm  
Wheel Size  
external diam.  
internal diam.  
7" (180mm)  
7/8" (22mm)  
Sanding Disc Size  
external diam.  
internal diam.  
7" (180mm)  
7/8" (22mm)  
Spindle Thread  
Weight  
5/8"-11UNC  
11 lbs. (5.0kg)  
7-Inch Disc Grinder Operator's Manual  
 
11  
Assembly  
ASSEMBLY:  
WARNING:  
BE SURE TO SWITCH POWER OFF AND DISCONNECT THE  
PLUG FROM THE RECEPTACLE TO AVOID SERIOUS  
TROUBLE.  
1. Assembling:  
a. Turn the disc grinder upsidedown so that  
the spindle is facing upward.  
b. To mount the wheel guard on the grinder  
first, slip the set ring (A) over the guard  
mounting flange, so locating pin fits in the  
guard locating groove, then twist guard in  
the groove into a proper angle, so the guard  
will protect the operator's body from injury  
by a broken wheel piece.  
c. Tighten the screw in the set ring (A) of guard.  
d. To mount a grinding wheel on the grinder,  
first align the oval-shaped indentation of the  
wheel washer with the notched part of the  
spindle, then attach them.  
e. Fit the protuberance of the grinding wheel  
onto the wheel washer.  
(Fig. 2)  
f.  
Screw the wheel nut onto the spindle.  
g. While pushing the lock button with one hand, lock the spindle by turning the  
grinding wheel slowly with the other hand.  
h. Tighten the wheel nut by using the supplied wrench as shown in Fig. 2.  
2. For use as a sander:  
a. After placing the Sanding disc on the rubber pad, insert the washer nut  
through the spindle.  
b. While pushing the lock button with one hand, lock the spindle by turning the  
sanding disc slowly with the other hand.  
c. Secure the sanding disc and rubber pad by tightening the washer nut with the  
wrench.  
CAUTION:  
MAKE SURE THAT THE GRINDING WHEEL, THE SANDING  
DISC OR RUBBER PAD ARE MOUNTED FIRMLY.  
3. Disassembling:  
To remove the wheel guard, the grinding wheel, the sanding disc, follow the above-  
mentioned procedure in reverse order.  
12  
7-Inch Disc Grinder Operator's Manual  
 
Operation  
APPLICATIONS:  
FOR USE AS A GRINDER:  
-Removal of casting fin and finishing of various types of steel, bronze and aluminum  
materials and castings.  
-Grinding of welded sections or sections cut by means of welding.  
-Grinding of synthetic resins, slate, brick, marble, etc.  
FOR USE AS A SANDER:  
-Preliminary sanding of metal surfaces before painting, rust removal, removing oil paint  
before repainting.  
-Finishing woodwork, correcting projections of timbers from joints or assemblies.  
-Preliminary sanding of wood surfaces before applying paint.  
PRE-OPERATION:  
1. Power source:  
Ensure that the power source to be utilized conforms to the power source  
requirements specified on the product nameplate.  
2. Power switch:  
Ensure that the switch is in the OFF position. If the plug is connected to a  
receptacle while the switch is in the ON position, the power tool will start operating  
immediately and can cause serious injury.  
3. Extension cord:  
When the work area is far away from the power source, use an extension cord of  
sufficient thickness and rated capacity. The extension cord should be kept as short  
as possible.  
4. Check the receptacle:  
If the receptacle only loosely accepts the plug, the receptacle must be repaired.  
Contact a licensed electrician to make appropriate repairs.  
If such a faulty receptacle is used, it may cause overheating, resulting in a serious  
hazard.  
5. Check your working environment:  
Ensure the following before operation;  
a. No flammable gas, liquid, or object at worksite.  
b. Grinding thin steel sheet may cause a high booming sound.  
In this case, place a rubber mat under the workpiece.  
c. Take appropriate noise preventive measures to prevent adverse affects on the  
environment by electrical noise.  
d. Clear the area of children or unauthorized personnel.  
6. Mounting the wheel guard:  
Be sure to mount the wheel guard at an angle that will protect the operator’s body  
from injury by a broken wheel piece.  
WARNING:  
IF NOT CORRECTLY ATTACHING A PROPER WHEEL GUARD,  
IT MAY LEAD TO SEVERE INJURY OR DEATH IF THE  
GRINDING WHEEL SHOULD BE BROKEN.  
7. Inspect the grinding wheel carefully before mounting:  
Thoroughly check that a specified grinding wheel free of cracks and splits  
is mounted. Make sure that the grinding wheel is firmly clamped and has  
been mounted in accordance with the instructions contained on page 12.  
7-Inch Disc Grinder Operator's Manual  
13  
 
Operation  
PRE-OPERATION (CONTINUED):  
8. Test the grinder before using:  
Before actually beginning the grinding work, test the grinder by first clearing the  
area of all other personnel. Make sure the wheel guard is in place and that you are  
wearing eye protection. Turn the grinder “on”, and make sure the grinder runs  
smoothly and shows no abnormalities.  
Duration of the trial run is as follows:  
When grinding wheel is replaced  
When starting daily work  
3 minutes or more  
1 minute or more  
9. Use only properly rated grinding wheels:  
Use only grinding wheels rated at 6600 RPM or more.  
Using a grinding wheel rated less can lead to wheel disintegration during operation  
and serious bodily injury.  
10. Check the spindle lock:  
Make sure that the lock button is disengaged by pushing lock button two or three  
times before turning on the grinder.  
11. Switch Operation:  
This enables the grinder always to be controlled with the hand gripping the  
machine for maximum safety during grinding operations.  
INTERMITTENT USE:  
Switch ON:  
Press the switch lever  
Switch OFF:  
Release the switch lever.  
CONTINUOUS USE:  
Switch ON:  
Press the switch lever. The switch is locked by pulling the  
lock button.  
Switch OFF:  
Press and release the switch lever.  
OPERATION:  
1. Always hold the handle and side handle of the POWER TOOL firmly. Otherwise  
the counterforce produced may result in inaccurate and even dangerous  
operation.  
2. Grinding Pressure:  
Since grinding by utiliing only the Disc Grinder's won weight is feasible, hold the  
Disc Grinder so that it only slightly contacts the plane to be ground.  
CAUTION:  
DO NOT PRESS THE DISC GRINDER FORCIBLY AGAINST THE  
PLANE TO BE GROUND. HEAVY PRESSURE WILL REDUCE  
THE REVOLVING SPEED AND SUCH DETERIORATE THE  
FINISHED SURFACE, AND PHENOMENA AS OVERLOAD WILL  
LEAD TO BURNING LOSS OF THE MOTOR.  
14  
7-Inch Disc Grinder Operator's Manual  
 
Operation  
OPERATION (CONTINUED):  
3. Grinding angle:  
Use only its peripheral surface by tilting the grinding  
wheel at an angle of 15° - 30°, as shown in Fig. 3-a.  
CAUTION:  
DO NOT UTILIZE THE ENTIRE  
SURFACE OF GRINDING WHEEL  
WHEN GRINDING.  
4. When using a new grinding wheel in direction A  
(Fig. 3-a), the wheel edge may cut into the workplace.  
In this case, grind in direction B (Fig. 3-a). Once the  
wheel edge is worn, the workpiece can be ground in  
both directions.  
The provided grinding wheel (resinoid wheel) is rated  
as class A grain and #24 grain size. Therefore, it is  
most appropriate for heavy grinding of general steel  
materials. It is also suitable for grinding other types of  
materials. For a fine finish, lift the disc grinder slightly  
and grind slowly at the appropriate speed.  
(Fig. 3-a)  
5. Precaution after use:  
Do not lay the grinder down immediately after use in a  
place where there are many shavings and much dirt  
and dust until it has completely stopped revolving.  
FOR USE AS A SANDER:  
1. Do not push the sanding disc to the surface to be  
ground.  
CAUTION:  
DO NOT PRESS THE DISC GRINDER  
FORCIBLY AGAINST THE PLANE TO  
BE GROUND. HEAVY PRESSURE  
WILL REDUCE THE REVOLVING  
SPEED AND SUCH DETERIORATE  
THE FINISHED SURFACE, AND  
PHENOMENA AS OVERLOAD WILL  
LEAD TO BURNING LOSS OF THE  
MOTOR.  
2. Sanding angle:  
Use only it peripheral surface by tilting the sanding  
disc at an angle of 15° -0 30°, as shown in Fig. 3-b.  
CAUTION:  
DO NOT UTILIZE THE ENTIRE  
SURFACE OF SANDING DISC WHEN  
SANDING.  
(Fig. 3-b)  
7-Inch Disc Grinder Operator's Manual  
 
15  
Maintenance and Inspection  
MAINTENANCE AND INSPECTION:  
WARNING:  
BE SURE TO SWITCH POWER OFF AND DISCONNECT THE  
PLUG FROM THE RECEPTACLE DURING MAINTENANCE AND  
INSPECTION.  
1. Replacing the grinding wheel:  
Replace the grinding wheel when it has been worn out to about 2-3/8"  
(60mm) in external diameter. Confirm that there is no crack or any damage to the  
grinding wheel. If there is a crack or a transformation in the wheel, replace  
it immediately.  
2. Inspecting the mounting screws:  
Regularly inspect all mounting screws and ensure that they are properly tightened.  
Should any of the screws be loosened, retighten them immediately.  
WARNING:  
USING THIS GRINDER WITH LOOSE SCREWS IS EXTREMELY  
DANGEROUS.  
3. Confirm that there is no damage in the wheel  
guard, the cord and the housing, etc.  
Furthermore, confirm that there is no abnormality  
in the activation of the switch.  
4. Inspecting the carbon brushes (Fig. 4):  
The motor employs carbon brushes which are  
consumable parts. Replace the carbon brush  
with a new one when it becomes worn to its  
wear limit. Always keep carbon brushes clean  
and ensure that they slide freely within the  
brush holders.  
(Fig. 4)  
CAUTION:  
USING THIS GRINDER WITH A CARBON BRUSH WHICH IS  
WORN IN EXCESS OF THE WEAR LIMIT WILL DAMAGE THE  
MOTOR.  
NOTE: Use JOHN DEERE carbon brush No. 44 indicated in Fig. 4.  
a. Replacing carbon brushes:  
Remove the brush caps (Fig. 1) with a slotted screwdriver. The carbon  
brushes can then be easily removed.  
16  
7-Inch Disc Grinder Operator's Manual  
 
Maintenance and Inspection  
SERVICE AND REPAIRS:  
All quality power tools will eventually require servicing or replacement of parts because  
of wear from normal use. To assure that only authorized replacement parts will be used,  
all service and repairs must be performed by a JOHN DEERE AUTHORIZED DEALER,  
ONLY.  
WARNING:  
ACCESSORIES FOR THIS POWER TOOL ARE MENTIONED IN  
THIS INSTRUCTION MANUAL. THE USE OF ANY OTHER  
ATTACHMENT OR ACCESSORY CAN BE DANGEROUS AND  
COULD CAUSE INJURY OR MECHANICAL DAMAGE.  
STANDARDACCESSORIES:  
-Wrench  
-Side Handle  
1
1
1
-Hexagon Bar Wrench  
NOTE: Accessories are subject to change without any obligation on the part of  
JOHN DEERE.  
7-Inch Disc Grinder Operator's Manual  
17  
 
Notes  
18  
7-Inch Disc Grinder Operator's Manual  
 
Notes  
7-Inch Disc Grinder Operator's Manual  
 
19  
Manufactured for Deere & Company,  
#37-0696-090403  
©Copyright 2003. John Deere  
Moline, Illinois 61265  
7-Inch Disc Grinder Operator's Manual  
 
110 Code No. C99110961 N  

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