John Deere ET-3301-J OPERATOR'S MANUAL

ET -3301-J 4 1/4-INCH
DISC GRINDER

CAUTION

RISK OF INJURY!

THIS MANUAL IS AN IMPORTANT PART OF THE DISC GRINDER

AND SHOULD REMAIN WITH THIS UNIT WHEN YOU SELL OR RENT IT.

4 1/4-Inch Disc Grinder Operator's Manual 1

READ MANUAL BEFORE OPERATING!

Introduction

Congratulations on the purchase of your new disc grinder! You can be assured your
grinder was constructed and designed with quality and performance in mind. Each
component has been rigorously tested to ensure the highest level of acceptance.

This operator's manual was compiled for your benefit. By reading and following the simple
safety, installation, operation, maintenance and troubleshooting steps described in this
manual, you will receive years of trouble-free operation from your new tool. The contents
of this manual are based on the latest product information available at the time of
publication. The manufacturer reserves the right to make changes in price, color, materi­als, equipment, specifications or models at any time without notice.

Once the unit has been removed from the box, immediately write in the serial number of your
unit in the space provided below.

SERIAL NUMBER_________________________________

Inspect for signs of obvious or concealed freight damage. If damage does exist, file a claim
with the transportation company immediately. Be sure that all damaged parts are replaced and
that the mechanical problems are corrected prior to operation of the unit. If you require service,
contact your Customer Service.

Mi-T-M® Corporation, 8650 Enterprise Drive, Peosta, IA 52068

1-877-JD-KLEEN / (1-877-535-5336) Fax [phone]

Monday - Friday 8:00 a.m. - 5:00 p.m. CST

Please have the following information available for all service calls:

1. Model Number

2. Serial Number

3. Date and Place of Purchase

WARNING

WEAR RESPIRAT ORY PROTECTION

Some dust created by power sanding, sawing, grinding, drilling and other construction
activities contain chemicals known to the State of California to cause cancer, birth
defects or other reproductive harm. Some examples of these chemicals are:

• Lead from lead-base paints,

• Crystalline Silica from bricks, cement and other masonry products, and

• Arsenic and Chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work.
To reduce your exposure to these chemicals, work in a well ventilated area and work
with approved safety equipment, such as those dust masks that are specially designed
to filter out microscopic particles.

2 4 1/4-Inch Disc Grinder Operator's Manual

Table of Content

SAFETY .................................................................................................................. 4-10

GENERAL SAFETY RULES.................................................................. 4-10

FUNCTIONAL DESCRIPTION............................................................................... 11

MODEL................................................................................................... 11

NAME OF PARTS.................................................................................. 11

SPECIFICATIONS ................................................................................. 11

OPERATION........................................................................................................... 12-14

APPLICATIONS ..................................................................................... 11

PRE-OPERATION ................................................................................. 12-13

OPERATION .......................................................................................... 13-14

MAINTENANCE AND INSPECTION ..................................................................... 15-16

MAINTENANCEE AND INSPECTION................................................... 15

SERVICE AND REPAIRS...................................................................... 16

STANDARD ACCESSORIES ................................................................ 16

NOTES ................................................................................................................... 17

FRENCH ................................................................................................................. 18-33

SPANISH ................................................................................................................ 34-51

4 1/4-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 4 1/4-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.

4 1/4-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 wires should be de-energized 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 4 1/4-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.

4 1/4-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 DEPRESSED CENTER WHEELS HAVING A MAXIMUM OPERATING
SPEED AT LEAST HIGH AS 13300 RPM.

8 4 1/4-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

Ampere Rating AWG
More Not More
Than Than

0 – 6 18 16 16 14

6 – 10 18 16 14 12
10 – 12 16 16 14 12
12 – 16 14 12 Not Recommended

(0 – 7.6) (7.9 – 15.2) (15.5 – 30.5) (30.8 – 45.7)

WARNING: AVOID ELECTRICAL SHOCK HAZARD. NEVER USE THIS

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.

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.

4 1/4-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

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 depressed center wheel which is cracked or deformed or worn away.

4. NEVER use a depressed center wheel with an RPM rating which is less than
13300 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. NEVER push in the lock pin while the spindle is running.

7. ALWAYS wear eye protection that meets the requirement of the latest revision of
ANSI Standard Z87.1.

8. ALWAYS wear a mask or respirator to protect yourself from dust or potentially
harmful particles generated during the grinding operation.

9. ALWAYS firmly grip the body handle and side handle while operating the grinder.

10. ALWAYS have a trial run before grinding commence.

11. ALWAYS follow the instructions contained in this manual when replacing the
depressed center wheel.

REPLACEMENT PARTS

When servicing use only identical replacement parts.
Repairs should be conducted only by an AUTHORIZED JOHN DEERE DEALER.

IMPROPER OR UNSAFE USE OF THE DISC GRINDER.

SAVE THESE INSTRUCTIONS AND MAKE THEM AVAILABLE TO

OTHER USERS AND OWNERS OF THIS TOOL!

10 4 1/4-Inch Disc Grinder Operator's Manual

Functional Description

MODEL:

ET-3301-J 4 1/4-INCH DISC GRINDER

NOTE: The information contained in this Instruction Manual is designed to assist

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:

SPECIFICATIONS:

4 1/4-INCH DISC GRINDER ET-3301-J:

Motor Single-Phase Series Commutator Motor

you in the safe operation and maintenance of the power tool.

(Fig. 1)

Power Source Single-Phase 115V AC 60Hz
Current 5A
No-Load Speed 11000/min
Wheel Size:

external diam. 4-1/2" (115 mm)

hole diam. 7/8" (22 mm)
Weight 5.3 lbs (2.5 kg)
Spindle Thread U5/8"-11

4 1/4-Inch Disc Grinder Operator's Manual 11

Operation

APPLICATIONS:

-Removal of casting fin and finishing of various type of steel, bronze and aluminum
materials and castings.

-Grinding of welded sections or sections cut by means of an acetylene torch.

-Grinding of synthetic resins, slate, brick, marble.

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 practicable.

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,

7. Inspect the depressed center wheel carefully before mounting:
Thoroughly check that a specified depressed center wheel free of cracks and splits
is mounted. Make sure that the depressed center wheel is firmly clamped and has
been mounted in accordance with the instructions contained on page 13-14.

12 4 1/4-Inch Disc Grinder Operator's Manual

IT MAY LEAD TO SEVERE INJURY OR DEATH IF THE
DEPRESSED CENTER WHEEL SHOULD BE BROKEN.

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 depressed center wheel is replaced 3 minutes or more
When starting daily work 1 minute or more

9. Use only properly rated depressed center wheels:
Use only depressed center wheels rated at 13300 RPM or more.
Using a depressed center wheel rated less can lead to wheel disintegration during
operation and serious bodily injury.

10. Check the lock pin:
Make sure that the lock pin is disengaged by pushing lock pin two or three times
before turning on the grinder.

OPERATION:

1. Hold the grinder firmly by its housing and side handle (Fig. 1).
The grinder produces a counterforce which must be controlled by firmly holding onto
the grinder.

2. Turn the grinder “on”:
While holding the grinder firmly, use one finger to slide the switch to the “on”
position.

3. Use light grinding pressure:
There is no need to press hard when grinding. Usually the grinder’s own weight is
sufficient to allow the required light contact with the surface to be ground.

WARNING: DO NOT PRESS THE GRINDER FORCIBLY AGAINST THE

4. Use proper grinding angle.
Grind only with the wheel’s edge by lifting the grinder 15° to 30°, as shown in Fig. 2.

CAUTION: DO NOT USE THE ENTIRE SURFACE OF THE DEPRESSED

SURFACE TO BE GROUND. HEAVY PRESSURE CAN RESULT IN
WHEEL BREAKAGE AND SERIOUS INJURY. IT CAN ALSO
DAMAGE THE SURFACE BEING GROUND OR DAMAGE THE
GRINDER’S MOTOR.

CENTER WHEEL. USE ONLY THE EDGE OF THE DEPRESSED
CENTER WHEEL.

4 1/4-Inch Disc Grinder Operator's Manual 13

Operation

OPERATION (CONTINUED):

5. Move the grinder in the proper direction:
When using a new depressed center wheel in
direction A (Fig. 2), the wheel edge may cut into the
workpiece. In this case, grind in direction B (Fig. 2).
Once the wheel edge is worn, the workpiece can be
ground in both directions.

NOTE: The wheel provided (resinoid wheel) is rated as

Class A grain and # 36 grain size. It is most
suitable for heavy grinding of steel and other
types of materials.

6. Adjust operation to desired finish:
For a fine finish, decrease pressure by lifting slightly.
Grind slowly and at the appropriate speed.

CAUTION: THE REVOLVING DEPRESSED

CENTER WHEEL WILL CREATE
AIR TURBULENCE.
DO NO LAY THE GRINDER DOWN
IN AREAS OF DUST OR DIRT
UNTIL IT HAS COME TO A
COMPLETE STOP.

DEPRESSED CENTER WHEEL ASSEMBLY AND DISASSEMBLY:

WARNING: NEVER ATTEMPT TO ASSEMBLE OR DISASSEMBLE THE

DEPRESSED CENTER WHEEL WHILE THE GRINDER IS
CAPABLE OF BEING TURNED “ON”.
BE SURE POWER SWITCH IS IN THE “OFF” POSITION AND THE
ELECTRICAL CORD HAS BEEN DISCONNECTED FROM THE
RECEPTACLE.

1. Assembling
a. Turn the disc grinder upsidedown so that the

spindle is facing upward.

b. Align the oval-shaped indentation of the wheel

washer with the notched part of the spindle,
then attach them.

c. Fit the protuberance of the depressed center

wheel onto the wheel washer.
d. Screw the wheel nut onto the spindle.
e. While pushing the lock pin with one hand, lock

the spindle by turning the depressed center

wheel slowly with the other hand. Tighten the

wheel nut by using the supplied wrench as

shown in Fig. 3.

(Fig. 2)

CAUTION: TIGHTEN THE WHEEL NUT

2. Disassembling:
To remove the depressed center wheel, follow the
above-mentioned procedure in reverse order.

14 4 1/4-Inch Disc Grinder Operator's Manual

SECURELY AND CONFIRM THAT
THE DEPRESSED CENTER WHEEL
DOES NOT WOBBLE.

(Fig. 3)

Maintenance and Inspection

MAINTENANCE AND INSPECTION:

WARNING: BE SURE TO SWITCH POWER OFF AND DISCONNECT THE

1. Replacing the depressed center wheel:
Replace the depressed center 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
depressed center 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

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.

CAUTION: USING THIS GRINDER WITH A CARBON BRUSH WHICH IS

PLUG FROM THE RECEPTACLE DURING MAINTENANCE AND
INSPECTION.

DANGEROUS.

Wear Limit

0.67" (17mm)

WORN IN EXCESS OF THE WEAR LIMIT WILL DAMAGE THE
MOTOR.

No. of Carbon
brush

0.24" (6mm)

(Fig. 4)

NOTE: Use JOHN DEERE carbon brush No. 21 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.

4 1/4-Inch Disc Grinder Operator's Manual 15

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

STANDARD ACCESSORIES:

-Wrench 1

-Side Handle 1

-Depressed center wheel 1
4-1/2" (115 mm) external dia. x 1/4" (6 mm) thickness x 7/8" (22 mm) hole dia.

NOTE: Accessories are subject to change without any obligation on the part of

JOHN DEERE.

THIS INSTRUCTION MANUAL. THE USE OF ANY OTHER
ATTACHMENT OR ACCESSORY CAN BE DANGEROUS AND
COULD CAUSE INJURY OR MECHANICAL DAMAGE.

16 4 1/4-Inch Disc Grinder Operator's Manual