6
The fastening torque is affected by a wide variety of fac-
tors including the following. After fastening, always check
the torque with a torque wrench.
1.
When the battery cartridge is discharged almost
completely, voltage will drop and the fastening
torque will be reduced.
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.
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.
6.
Operating the tool at low speed will cause a reduc-
tion in the fastening torque.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before attempting to perform
inspection or maintenance.
Replacing carbon brushes (Fig. 9 & 10)
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
After replacing brushes, insert the battery cartridge into
the tool and break in brushes by running tool with no load
for about 1 minute. Then check the tool while running and
electric brake operation when releasing the switch trig-
ger. If electric brake is not working well, ask your local
Makita service center for repair.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed 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.
• Various type of Makita genuine batteries and chargers
ENG102-2
For European countries only
Noise
The typical A-weighted noise level determined according
to EN60745:
Sound pressure level (
L
pA
): 95 dB (A)
Sound power level (
L
WA
): 106 dB (A)
Uncertainty (K): 3 dB (A)
Wear ear protection
ENG205-1
Vaibration
The vibration total value (tri-axial vector sum) determined
according to EN60745-2-2:
Work mode: impact tightening of fasteners of the
maximum capacity of the tool
Vibration emission (a
h
): 7.0 m/s
2
Uncertainty (K): 1.5 m/s
2
ENG901-1
• The declared vibration emission value has been mea-
sured in accordance with the standard test method and
may be used for comparing one tool with another.
• The declared vibration emission value may also be
used in a preliminary assessment of exposure.
WARNING:
• The vibration emission during actual use of the power
tool can differ from the declared emission value
depending on the ways in which the tool is used.
• Be sure to identify safety measures to protect the oper-
ator that are based on an estimation of exposure in the
actual conditions of use (taking account of all parts of
the operating cycle such as the times when the tool is
switched off and when it is running idle in addition to
the trigger time).
ENH101-12
EC Declaration of Conformity
We Makita Corporation as the responsible manufac-
turer declare that the following Makita machine(s):
Designation of Machine: Cordless Impact Wrench
Model No./ Type: 6934FD
are of series production and
Conforms to the following European Directives:
98/37/EC until 28th December 2009 and then with
2006/42/EC from 29th December 2009
And are manufactured in accordance with the following
standards or standardised documents:
EN60745
The technical documentation is kept by our authorized
representative in Europe who is:
Makita International Europe Ltd.
Michigan Drive, Tongwell,
Milton Keynes, MK15 8JD, England
30th January 2009
Tomoyasu Kato
Director
Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi, JAPAN
