Makita 6904VH User manual

Imnact Wrench
No load speed (RPM)
I-
12.7 mm (1/2") MODEL 6904VH
Fastening torque
INSTRUCTION MANUAL
High
DOUBLE
INSULATION
LOW High LOW
SPECIFICATIONS
0 - 2,400 0 - 2,100 2,000 kg cm 1145 ff.lbs) 1,500 kg.cm 1109 ft Ibs) 265 mm 110~318"l
capacmes impacts per mmute
1 8 kg 14 0 lbsl
x Manufacturer reserves the right to change specifications without notice.
* Note: Specifications may differ from country to country.

IMPORTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING: WHEN USING ELECTRICTOOLS, BASICSAFETY
PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE
THE RISK OF FIRE, ELECTRIC SHOCK, AND PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
2
KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
CONSIDER WORK AREA ENVIRONMENT. Don't use power tools in damp
or wet locations. Keep work area well
lit. Don't expose power tools torain.
Don't use tool
in presence of flammable liquids or gases.
KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact tool or extension cord.
STORE IDLETOOLS. Whennot
in use, tools shouldbestored in dry. and high
or locked-up place - out of reach of children.
DON'T FORCETOOL.
It willdothejob better and safer at the ratefor which
it was intended.
USE RIGHT TOOL. Don't force small tool or attachment to do the job of a
heavy-dutytool. Don't usetoolfor purpose not intended; for example, don't
use circular saw for cutting tree limbs or logs.
DRESS PROPERLY. Don't wear loose clothingorjewelry. They can becaught
in moving parts. Rubber gloves and non-skid footwear are recommended
when working outdoors. Wear protective hair coveringtocontain long hair.
USE SAFETY GLASSES. Also use face or dust mask
if cutting operation is
dusty.
DON'T ABUSE CORD. Never carry tool by cordor yank
it todisconnect 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.
DON'T OVERREACH. Keep proper footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and
safer performance. Follow instructionsfor lubricating and changing acces-
sories. Inspect toolcords periodically and
if damaged, have repairedby autho-
rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.
DISCONNECTTOOLS. When notinuse, before servicing, and when chang-
ing accessories, such as blades, bits, cutters.

14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keysand adjusting wrenches are removed fromtool before turning
it on.
15. AVOID UNINTENTIONALSTARTING. Don't carry tool
with finger onswitch.
Be sure switch is OFF when plugging in.
16. EXTENSION CORDS. 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 showsthe
correct size touse depending oncord 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 SETS
Total Length of Cord in Feet
0- 6
6
- 10
10 - 12
12
- 16
I 0 - 25 I 26- 50 I 51 - 100 I 101 - 150
18 16 14
16 16 14 12
14 12
Not Recommended
18 16 ;: I 12
Ampere Rating
More Not More
Than Than AWG
17. OUTDOOR USE EXTENSIONCORDS. When tool is usedoutdoors, use only
extension cords intended for use outdoors and
so marked.
18. STAY ALERT. Watch what you aredoing, use commonsense. Don't operate
tool when you are tired.
19. CHECK DAMAGEDPARTS. 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
service center unless otherwise indicated elsewhere
in this instruction
manual. Havedefective switches replacedby authorized service center. Don't
use tool if switch does not turn it on and off.
20. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.
21. REPLACEMENTPARTS. When servicing, useonly identical replacementparts.
22. POLARIZEDPLUGS. 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,
reversethe plug.
If it still doesnot fit, contact aqualified electrician toinstall
the proper outlet. Do not change the plug in any way.
3

VOLTAGE WARNING: Before connecting the toolto a power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplate of the tool. A power source with voltage greater than that specified
for the tool can result in SERIOUS INJURY tothe user
- as well as damage to
the tool. If
in doubt, DO NOT PLUG IN THE TOOL. Using a power source with
voltage less than the nameplate rating is harmful to the motor.
ADDITIONAL SAFETY RULES
1. Wear ear protectors.
2. Check the socket carefully for wear, cracks or damage before installation.
3. Hold the tool firmly.
4. Always be sure you have a firm footing.
Be sure no one is below when using the tool
in high locations.
5. The proper fastening torque may differ depending upon the kind or size of
the bolt. Check the torque with a torque wrench.
6. When driving into walls, floors or wherever "live" electrical wires may be
encountered,
DO NOT TOUCH ANY METAL PARTS OF THE TOOL!
Holdthe toolonly bythe insulatedgrasping surfaces toprevent electric shock
if you drive into a "live" wire.
SAVE THESE INSTRUCTIONS.
4

Selectingcorrect socket
Always use the correct
size socket for bolts and nuts. An incorrect size socket will result
in inaccurateand inconsistentfasteningtorque and/or damage to the bolt or nut. Refer to
accessoriessectionfor socket size.
Installingor removing socket
CAUTION
:
Always be sure that the tool is switched off and unplugged before installing or removing
the socket.
To install the socket, push it onto the anvil
of the tool until it locks into place.
To removethe socket, simply pull
it off.
Switch action
Tool speed
is in reased by increasing pres-
sure
on the trigger. To start the tool,
simply pull the trigger.
Release the trigger
to stop.
CAUTION
:
Before plugging in the tool, always check to see that the trigger switch actuates properly
and returns tothe "OFF" position when released.
5

Reversingswitch action I \\
This tool has a reversing switch to change
the direction of rotation. Press the upper
side
(FWD side)of the switch for clockwise
rotation or the lower side
(REV side) of
switch for counterclockwise rotation.
Counterclockwis
CAUTION :
0 Always check the directionof rotationbefore operation.
*Use the reversing switch only after the tool comes to
a complete stop. Changing the
direction
of rotationbefore the tool stops may damage the tool.
Speed change
Slide the speed change lever to "H" side
(lower side)for higher speed or to
"L" side
(upper side) for lower speed.
6

Operation
The proper fastening torque may differ depending upon the kind or size of the bolt. The
relation betweenfasteningtorque and fasteningtime
is shown in the figures below.
Standard bolt
kg cm
(ft Ibr)
1400 M16
x 50 15/23'' x 2 'I at high sped
Proper faltenlng torque
for M16 15/23"]
,/. M16 x 50 (518" x 2"l at low speed
Proper fastening torque
for M12 1112")
proper
faltenlng torque
~M12x50(112"x2")atIowrpeed
200 I M10 x 50 (318" x 2") at low weed for M10 1318"l
"MlOhO
1;'' x 2") at high speed
-
0 1 2 3 Seconds
Fartenlng time
High tensile bolt
11881 Proper fartenlng torque
2400
(174)
for M16 (518")
:1'5"99 I
M16 x 50 1518'' x 2") at high speed
21 1130) M12~50(112;~2~ at hlgh speed
Proper fartenlng torque
for M12 1112")
M12 x 50 (112" x 2"1 at low speed
proper
fastening ""e
for M10 1318")
M10
x 50 (318" x 2") at low speed
1' Ml>x 50 1318" x 2") at hlgh speed
I..., -
0123456 Seconds
Farteninq time
7

Holdthe tool firmly and place the socket over the bolt or nut. Turn the tool on and
fasten for the proper fasteningtime.
NOTE :
0 Hold the tool pointed straight at the bolt or nut without applying excessive pressure on
the tool.
0 Excessive fastening torque may damage the bolt or nut. Before startingyour job, always
perform
a test operation to verify the adequate fastening speed and timefor 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.
2.
3.
4.
5.
Voltage
Voltage dropwill cause
a reduction in the fasteningtorque.
Socket
*Failure touse the correct
size socket will cause a reduction in the fasteningtorque.
*A worn socket (wear on the hex end or square end) will cause
a reduction in the
Bolt
*Even though the torque coefficient and
the class of bolt are the same, the proper
fasteningtorque will differ accordingto the diameter of the bolt.
*Even though the diameters of bolts are the same, the proper fastening torque will
differ accordingtothe torque coefficient, the class of bolt and the bolt length.
The use of the universal joint or the extension bar somewhat reduces the fastening
force of the impact wrench. Compensate by fasteningfor
a longer period of time.
The type of materialsto be fastened and the manner of holding the tool will affect the
torque.
fasteningtorque.
Screwdriving
When driving screws, install a bit adapter
(optional accessory) on the tool and insert
a driver bit (optional accessory) into the
bit adapter. Place the point of the driver
bit in the screw head and apply pressureto
the tool. Start the tool slowly and then
increase the speed gradually. Release the
triggerjust
as the screw bottoms out.
I
NOTE :
Use the best size driver bitfor the size of screw that you wish to use.
0 Hold the tool pointed straight at the screw, or the screw and/or bit may be damaged.
When drivingwood screws, pridrill pilot holes to make drivingeasier andtopreventsplit-
ting of the workpiece. The pilot holes should be slightly smaller than the wood screws
in diameter.
8

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 RELlABlLITY, repairs, carbon brushinspection and
replacement, any other maintenance or adjustment should be performed by Makita
Authorized or Factory Service Centers, always using Makita replacement parts.
9

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.
The accessories or attachments should
be used only in the proper and intended manner.
Extension bar
Part No. 785201-8
Recommendedfor work in tight place
where the conventional socket will not
reach.
0 Phillips bit
(Usewith bitadapter)
Part No. L h"
784202-3 45 (1-3/4"1
784203-1
65 12-5/8")
784206-5 11 0 14-3/8"1
0 Universaljoint
Part No. 785205-0
This accessory
is useful intight spaces
where the tool cannot be held in line
with
the axis of the boltor nut.
Bit adapter
Part No. 134530-0
For driving machine screws.
0 Plastic carrying case
Part No. 824439-1
10

July-l5--'91 US
12.7 mm W2")
IMPACT WRENCH
Model 6904VH
Note: The switch and other part configurations
may differ from country to country.
11

MACHINE
~
1
2
3
4
5
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
2
1
1
1
1
1
1
1
1
1
1
1
1
1
25
1
1
1
1
1
1
Carbon Brush
Name Plate
0 Ring 62
Steel
Ball 5 6
Switch
Switch
Housing Set (With lfem 411
Bumper
011 Seal 18
Sleeve 18
Rubber Washer 18
Flat Washer 18
Anw
Hammer
Steel
Ball 4
Flat Washer 28
Compression Spring
29
Steel Ball 5 6
Spindle
Ball Bearing 608VV
Flat Washer 16
ITEM NO.
NO.
USED
Julv-15--’91 US
DESCRIPTION
MA(
23
24
25
26
-
27
26
29
30
31
32
33
34
35
36
37
38
39
40
41
NE
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
3
7
1
Note
The switch and other part specifications may differ from country to country
0 Ring 17
Field
Ball Bearing 627118
ARMATURE ASSEMBLY
(With Item
25 - 281
Fan
52
Ball Bearing 609LLB
Gear Complete 16-36
Plane Bearing 6
Rubber Pin 4
Rubber
Pin 4
Strain
Relief
Cord Guard
Cord
Tapping
Screw 4x18
Strain
Relief
Pan Head Screw M4r25 [WithWasher)
Pan Head Screw M4~20(With Washer]
Housing Sei lWiIh Item 81
Plane
Bearing 5
MAKnA LIMITED ONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leavingthe 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 ServiceCenters. If inspection shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
ThisWarranty does not apply where:
repairs have been made or attemptedby others:
repairs are required because of normal wear and tear:
The tool has been abused, misused or improperly maintained;
8 alterations have been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTALOR CON-
SEQUENTIAL DAMAGES FROM THE SALE OR USE OF THE PRODUCT.THIS DISCLAIMER
APPLIESBOTH 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 OFTHIS WARRANTY.
This Warranty gives you specific legal rights, and you may also have other rights which vary from
state
to state. Some states do not allow the exclusion or limitation of incidentalor consequential
damages,
so the above limitation or exclusion may not apply to you. Some states do not allow
limitation onhow long an implied warranty lasts, so the above Limitation may not apply
to you.
_. -
Makita Corporation
3-11 -8, Sumiyoshi-cho,
Anjo, Aichi 446 Japan
8837748068
PRINTED IN JAPAN
1995- 5-N