Makita IMPACT WRENCH 6904VH Instruction Manual

INSTRUCTION MANUAL

WARNING:

For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.

www.makitatools.com

Impact Wrench

12.7 mm (1/2”)
MODEL 6904VH

002287

DOUBLE
INSULATION

2

SPECIFICATIONS

• Manufacturer reserves the right to change specifications without notice.

• Specifications may differ from country to country.

GENERAL SAFETY RULES

USA002-2

(For All Tools)

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

Model 6904VH

Capacities

Standard bolt M10 - M16 (3/8” - 5/8”)

High tensile bolt M10 - M12 (3/8” - 1/2”)

Wood screw 6 mm x 100 mm (1/4” x 3-15/16”)

Self-drilling screw 6 mm (1/4”)

Square drive 12.7 mm (1/2”)

No load speed

(RPM)

High 0 - 2,400/min.

Low 0 - 2,100/min.

Impacts per minute

High 0 - 3,000

Low 0 - 2,500

Max. fastening torque

High 196 N.m (145 ft.lbs)

Low 147 N.m (109 ft.lbs)

Overall length 265 mm (10-3/8”)

Net weight 1.8 kg (4.0 lbs)

3

Work Area

1. Keep your work area clean and well lit.

Cluttered benches and dark areas invite acci­dents.

2. Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases, or dust.

Power
tools create sparks which may ignite the dust
or fumes.

3. Keep bystanders, children, and visitors
away while operating a power tool.

Distrac-

tions can cause you to lose control.

Electrical Safety

4. Double insulated tools are equipped with
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 a polarized outlet. Do not
change the plug in any way.

Double insula-

tion eliminates the need for the three wire
grounded power cord and grounded power
supply system.

5. Avoid body contact with grounded sur­faces such as pipes, radiators, ranges and
refrigerators.

There is an increased risk of

electric shock if your body is grounded.

6. Do not expose power tools to rain or wet
conditions.

Water entering a power tool will

increase the risk of electric shock.

7. Do not abuse the cord. Never use the cord
to carry the tools or pull the plug from an
outlet. Keep cord away from heat, oil,
sharp edges or moving parts. Replace
damaged cords immediately.

Damaged

cords increase the risk of electric shock.

8. When operating a power tool outside, use
an outdoor extension cord marked “W-A”
or “W”.

These cords are rated for outdoor

use and reduce the risk of electric shock.

Personal Safety

9. Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or
medication.

A moment of inattention while
operating power tools may result in serious
personal injury.

10. Dress properly. Do not wear loose cloth­ing or jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from
moving parts.

Loose clothes, jewelry, or long

hair can be caught in moving parts.

11. Avoid accidental starting. Be sure switch
is off before plugging in.

Carrying tools with
your finger on the switch or plugging in tools
that have the switch on invites accidents.

12. Remove adjusting keys or wrenches
before turning the tool on.

A wrench or a
key that is left attached to a rotating part of
the tool may result in personal injury.

13. Do not overreach. Keep proper footing
and balance at all times.

Proper footing and
balance enables better control of the tool in
unexpected situations.

14. Use safety equipment. Always wear eye
protection.

Dust mask, non-skid safety
shoes, hard hat, or hearing protection must
be used for appropriate conditions. Ordinary
eye or sun glasses are NOT eye protection.

Tool Use and Care

15. Use clamps or other practical way to
secure and support the workpiece to a
stable platform.

Holding the work by hand or
against your body is unstable and may lead
to loss of control.

16. Do not force tool. Use the correct tool for
your application.

The correct tool will do the
job better and safer at the rate for which it is
designed.

4

17. Do not use tool if switch does not turn it
on or off.

Any tool that cannot be controlled
with the switch is dangerous and must be
repaired.

18. Disconnect the plug from the power
source before making any adjustments,
changing accessories, or storing the tool.

Such preventive safety measures reduce the
risk of starting the tool accidentally.

19. Store idle tools out of reach of children
and other untrained persons.

Tools are

dangerous in the hands of untrained users.

20. Maintain tools with care. Keep cutting
tools sharp and clean.

Properly maintained
tools with sharp cutting edges are less likely
to bind and are easier to control.

21. Check for misalignment or binding of
moving parts, breakage of parts, and any
other condition that may affect the tools

operation. If damaged, have the tool ser­viced before using.

Many accidents are

caused by poorly maintained tools.

22. Use only accessories that are recom­mended by the manufacturer for your
model.

Accessories that may be suitable for
one tool, may become hazardous when used
on another tool.

SERVICE

23. Tool service must be performed only by
qualified repair personnel.

Service or main­tenance performed by unqualified personnel
could result in a risk of injury.

24. When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual.

Use of unauthorized parts or failure to follow
Maintenance instructions may create a risk of
electric shock or injury.

USE PROPER 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 1 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.

Table 1: Minimum gage for cord

Ampere Rating

Volts Total length of cord in feet

120 V 25 ft. 50 ft. 100 ft. 150 ft.

More Than Not More Than

AWG

0 6 18 16 16 14

6 10 18161412
10 12 16 16 14 12
12 16 14 12 Not Recommended

5

SPECIFIC SAFETY RULES

USB003-2

DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to impact wrench safety
rules. If you use this tool unsafely or incorrectly, you can suffer
serious personal injury.

1. Hold tool by insulated gripping surfaces
when performing an operation where the
cutting tool may contact hidden wiring or
its own cord.

Contact with a “live” wire will
make exposed metal parts of tool “live” and
shock the operator.

2. Wear ear protectors.

3. Check the socket carefully for wear,
cracks or damage before installation.

4. Hold the tool firmly.

5. Always be sure you have a firm footing.
Be sure no one is below when using the
tool in high locations.

6. The proper fastening torque may differ
depending upon the kind or size of the
bolt. Check the torque with a torque
wrench.

SAVE THESE INSTRUCTIONS

WARNING:

MISUSE or failure to follow the safety rules stated in this
instruction manual may cause serious personal injury.

6

FUNCTIONAL
DESCRIPTION

CAUTION:

• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.

Switch action

CAUTION:

• Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
position when released.

To start the tool, simply pull the switch trigger. Tool speed is
increased by increasing pressure on the switch trigger.
Release the switch trigger to stop.

Reversing switch action

This tool has a reversing switch to change the direction of
rotation. Press the upper side (FWD side) of the reversing
switch for clockwise rotation or the lower side (REV side) of
the reversing switch for counterclockwise rotation.

CAUTION:

• Always check the direction of rotation before operation.

• Use the reversing switch only after the tool comes to a

complete stop. Changing the direction of rotation before
the tool stops may damage the tool.

Speed change

To change the speed, slide the speed change lever to the “H”
side (lower side) for high speed or to the “L” side (upper side)
for low speed. Be sure that the speed change lever is set to
the correct position before operation. Use the right speed for
your job.

CAUTION:

• Do not use the speed change lever while the tool is
running. The tool may be damaged.

1. Switch trigger

1

002311

1. Reversing switch

1

002322

1. Speed change lever

1

002329

7

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.

Selecting correct socket

Always use the correct size socket for bolts and nuts. An
incorrect size socket will result in inaccurate and inconsistent
fastening torque and/or damage to the bolt or nut.

Installing or removing socket

To install the socket, push it onto the anvil of the tool until it
locks into place.
To remove the socket, simply pull it off.

OPERATION

The proper fastening torque may differ depending upon the
kind or size of the bolt, the material of the workpiece to be
fastened, etc. The relation between fastening torque and fas­tening time is shown in the figures.

1. Socket

2. Anvil

1

2

002335

N.m

(ft.lbs)

140
(101)

120
(87)

100
(72)

80
(58)

60
(43)

40
(29)

20
(14)

01 2

3

(S)

M16X50 (5/8” X 2”) at high speed

M16 (5/8”)

M16X50 (5/8” X 2”) at low speed

M12X50 (1/2” X 2”) at high speed

M12X50 (1/2” X 2”) at low speed

M10X50 (3/8” X 2”) at low speed

M10X50 (3/8” X 2”) at high speed

M12 (1/2”)

M10 (3/8”)

Fastening time

Fastening torque

Standard bolt

Proper fastening torque

8

Hold the tool firmly and place the socket over the bolt or nut.
Turn the tool on and fasten for the proper fastening time.

NOTE:

• Hold the tool pointed straight at the bolt or nut.

• Excessive fastening torque may damage the bolt/nut or

socket. Before starting your job, always perform a test
operation to determine the proper fastening time for your
bolt or nut.

The fastening torque is affected by a wide variety of factors
including the following. After fastening, always check the
torque with a torque wrench.

1. Voltage
Voltage drop will cause a reduction in the fastening
torque.

2. Socket

• Failure to use the correct size socket will cause a

reduction in the fastening torque.

• A worn socket ( wear on the hex end or square end )

will cause a reduction in the fastening torque.

N.m

260
(188)

240
(174)
220
(159)

200
(145)
180
(130)
160
(116)
140
(101)
120
(87)
100
(72)
80
(58)

60
(43)

40
(29)
20
(14)

012

3

(S)

M16X50 (5/8” X 2”) at high speed

M16 (5/8”)

M16X50 (5/8” X 2”) at low speed

M12X50 (1/2” X 2”) at high speed

M12X50 (1/2” X 2”) at low speed

M10X50 (3/8” X 2”) at low speed

M10X50 (3/8” X 2”) at high speed

M12 (1/2”)

M10 (3/8”)

Fastening time

Fastening torque

45 6

Proper fastening torque

High tensile bolt

9

3. Bolt

• Even though the torque coefficient and the class of

bolt are the same, the proper fastening torque will
differ according to the diameter of bolt.

• Even though the diameters of bolts are the same, the

proper fastening torque will differ according to the
torque coefficient, the class of bolt and the bolt
length.

4. The use of the universal joint or the extension bar some­what reduces the fastening force of the impact wrench.
Compensate by fastening for a longer period of time.

5. The manner of holding the tool or the material of driving
position to be fastened will affect the torque.

Screwdriving operation

When driving screws, install a bit adapter (optional acces­sory) on the tool and insert a driver bit (optional accessory)
into the bit adapter.

Hold the tool firmly and place the point of the driver bit in the
screw head. Apply forward pressure to the tool to the extent
that the bit will not slip off the screw. Start the tool slowly and
then increase the speed gradually. Release the switch trigger
just as the screw bottoms out.

NOTE:

• Use the proper bit for the head of the screw/bolt that you
wish to use.

• Hold the tool pointed straight at the screw or the screw
and/or bit may be damaged.

• When driving wood screws, predrill pilot holes to make
driving easier and to prevent splitting of the workpiece.
The pilot holes should be slightly smaller than the wood
screws in diameter.

002371

10

MAINTENANCE

CAUTION:

• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.

To maintain product SAFETY and RELIABILITY, repairs, car­bon brush inspection and replacement, any other mainte­nance or adjustment should be performed by Makita
Authorized or Factory Service Centers, always using Makita
replacement parts.

ACCESSORIES

CAUTION:

• These accessories or attachments are recommended for
use with your Makita tool specified in this manual. The
use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.

If you need any assistance for more details regarding these
accessories, ask your local Makita service center.

• Extension bar

• Universal joint

• Bit adapter

• Screw bits

• Plastic carrying case

Memo

11

Memo

12

13

First-Class

Postage

Required

Post Office will

not deliver

without proper

postage.

Makita U.S.A., Inc.

14930 Northam Street
La Mirada, CA 90638-5753

Fold

Cut

14

1. This product was purchased from:

Home Center

Hardware/Lumber Store

Tool Distributor

Industrial Supply

Construction Supply

Other ( )

3. How did you learn about this product:

Magazine

From Dealer

Newspaper

Store Display

Catalog

Radio

Exhibition

From Friend

Previous Usage

Other ( )

2. Use of the product is intended for:

Construction Trade

Industrial Maintenance

Home Maintenance

Hobby

Other ( )

4. Most favored points are:

Repair Service

Durability

Powe r

Other ( )

Design

Features

Size

Price

Makita Brand

5. Any comments:

MAIL THIS PORTION

Your answers to the following questions are appreciated.

BE SURE TO COMPLETE THE CUSTOMER’S PORTION OF THIS FORM AND RETAIN FOR YOUR RECORDS.

DATE PURCHASED MODEL NO.

SERIAL NO.

INTL. LAST NAME / COMPANY NAME

STREET ADRESS

CITY

S TATE

AGE:

ZIP CODE PHONE

AREA
CODE

STATUS

Married

SEX

MF

Single

MONTH DAY YEAR

Under 19 20-29 30-39 40-49 50-60 Over 60

Please return this portion by facsimile or mail.

Facsimile No: [phone]

Paste Paste Paste Paste Paste Paste Paste Paste

Paste Paste Paste Paste Paste Paste

Paste Paste Paste Paste Paste Paste

15

FACTORY SERVICE CENTERS

1-800-4-MAKITA

RETAIN THIS PORTION FOR YOUR RECORDS

ALABAMA

2365 Pelham Parkway
Pelham, AL 35124
[phone]

ARIZONA

3707 E. Broadway Rd., Ste. 6
Phoenix, AZ 85040
[phone]

ARKANSAS

Shackleford Shopping Center
240 South Shackleford Rd.,
Ste. C
Little Rock, AR 72211
[phone]

CALIFORNIA

41850 Christy St.
Fremont, CA 94538-5107
[phone]

1421 N. Clovis Ave., Ste. 112
Fresno, CA 93727
[phone]

14930 Northam St.
La Mirada, CA 90638-5753
[phone]

1970 Fulton Avenue
Sacramento, CA 95825
[phone]

1440 South “E” Street
San Bernardino, CA 92408
[phone]

7674 Clairemont Mesa Blvd.
San Diego, CA 92111
[phone]

1714 E.McFadden Ave., Unit M
Santa Ana, CA 92705
[phone]

1565 Winchester B.
Campbell, CA 95008-0501
[phone]

16735 Saticoy St., Ste. 105
Van Nuys, CA 91406
[phone]

COLORADO

11839 E. 51st Ave.
Denver, CO 80239-2709
[phone]

CONNECTICUT

508 Spring St.
Windsor Locks, CT 06096
[phone]

FLORIDA

620 Douglas Ave. Suite 1302
Altamonte Springs, FL 32714
[phone]

750 East Sample Road
Pompano Beach, FL 33064
[phone]

Thompson Center Waters
5501 W. Waters Ave., Ste. 406
Tampa, FL 33634
[phone]

GEORGIA

4680 River Green Parkway
Duluth, GA 30096-2566
[phone]

HAWAI I

4510 Salt Lake Blvd., Suite A7
Honolulu, HI 96818
[phone]

ILLINOIS

1450 Feehanville Dr.
Mt. Prospect, IL 60056-6011
[phone]

INDIANA

8403 Michigan Road, Unit 1
Indianapolis, IN 46268
[phone]

KANSAS

8819 W. 95th St.
Overland Park, KS 66212
[phone]

KENTUCKY

1215 S. Hurstbourne Parkway
Louisville, KY 40222
[phone]

LOUSIANA

5626 Jefferson Hwy.
Harahan, LA 70123
[phone]

MARYLAND

7541 - 45 Ritchie Highway
Glen Burnie, MD 21061
[phone]

MASSACHUSETTS

232 Providence Hwy.
Westwood, MA 02090
[phone]

MICHIGAN

37454 Ann Arbor Trail
Livonia, MI 48150
[phone]

MINNESOTA

6427 Penn Ave. South
Richfield, MN 55423
[phone]

MISSOURI

9876 Watson Road
St. Louis, MO 63126-2221
[phone]

NEBRASKA

4129 S. 84th St.
Omaha, NE 68127
[phone]

NEVADA

3375 S. Decatur Blvd.
Suites. 22 - 24
Las Vegas, NV 89102
[phone]

NEW JERSEY

251 Herrod Blvd.
Dayton, NJ 08810-1539
[phone]

NEW MEXICO

5805 Menaul Blvd. NE
Albuquerque, NM 87110
[phone]

NEW YORK

4917 Genessee Street
Cheektowaga, NY 14225
[phone]

131-35 31st Ave.
Flushing, NY 11354
[phone]

NORTH CAROLINA

3501-G S. Tryon St.
Charlotte, NC 28217
[phone]

OHIO

6253 E. Main St.
Columbus, OH 43213
[phone]

6379 Pearl Road
Parma Heights, OH 44130
[phone]

1617 E. Kemper Rd.
Sharonville, OH 45246
[phone]

OKLAHOMA

552 E. Memorial Road
Oklahoma City, OK 73114
[phone]

OREGON

828 19th Avenue., N.W.
Portland, OR 97209
[phone]

PENNSYLVANIA

Springwater Plaza
364 Wilmington W. Chester
Pike
Glen Mills, PA 19342
[phone]

6200 Babcock Blvd
Pittsburgh, PA 15237
[phone]

PUERTO RICO

200 Guayama St.
Hato Rey, PR 00917
[phone]

TENNESSEE

4655 Nolensville Rd.
Nashville, TN 37211
[phone]

TEXAS

12801 Stemmons Fwy Ste. 809
Farmers Branch, TX 75234
[phone]

12701 Directors Dr.
Stafford, TX 77477-3701
[phone]

3453 IH-35 North, Ste. 101
San Antonio, TX 78219
[phone]

UTAH

145 E. 1300 S., Ste. 101
Salt Lake City, UT 84115
[phone]

VIRGINIA

5760 Northampton Blvd,. Ste.
102
Virginia Beach, VA 23455
[phone]

WASHINGTON

22220 84th Ave. So., Bldg. A
Kent, WA 98032
[phone]

WISCONSIN

Lincoln Plaza Shopping Ctr.
2245 S. 108th St. West Allis, WI
53227
[phone]

CUSTOMER’S RECORD

When you need service: Send
complete tool (prepaid) to one
of the Makita Factory Service
Centers listed, or to an Authorized
Makita Service Center. Be sure
to attach a letter to the outside of
the carton detailing the problem
with your tool.

Date Purchased

Dealer’s Name & Address

Model No.

Serial No.

WARNING

Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains 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-based paints,

• crystalline silica from bricks and 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.

MAKITA LIMITED ONE YEAR WARRANTY

Warranty Policy

Every Makita tool is thoroughly inspected and tested before leaving the factory. It is warranted to be free of
defects from workmanship and materials for the period of ONE YEAR from the date of original purchase.
Should any trouble develop during this one-year period, return the COMPLETE tool, freight prepaid, to one of
Makita's Factory or Authorized Service Centers. If inspection shows the trouble is caused by defective
workmanship or material, Makita will repair (or at our option, replace) without charge.

This Warranty does not apply where:

• repairs have been made or attempted by others:

• repairs are required because of normal wear and tear:

• the tool has been abused, misused or improperly maintained:

• alterations have been made to the tool.

IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES FROM THE SALE OR USE OF THE PRODUCT. THIS DISCLAIMER APPLIES BOTH DURING
AND AFTER THE TERM OF THIS WARRANTY.

MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED WARRANTIES OF
"MERCHANTABILITY" AND "FITNESS FOR A SPECIFIC PURPOSE," AFTER THE ONE-YEAR TERM OF
THIS WARRANTY.

This Warranty gives you specific legal rights, and you may also have other rights which vary form state to state.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. Some states do not allow limitation on how long an implied
warranty lasts, so the above limitation may not apply to you.

Makita Corporation

3-11-8, Sumiyoshi-cho,

Anjo, Aichi 446-8502 Japan

883774D068