Maintenance; Replacing Carbon Brushes - Makita TW0350 Instruction Manual

High tensile bolt
300
250 M16(F10T)
(5/8")
200
150
100
50
0
1
Fastening time (S)
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:
• When fastening screw M12 or smaller, carefully
adjust pressure on the switch so that the screw
is not damaged.
• Hold the tool pointed straight at the bolt or nut
without applying excessive pressure on the tool.
• If you fasten the bolt for a time longer than
shown in the figures, the bolt or the socket may
be overstressed, damaged, etc. Before starting
your job, always perform a test operation to
determine the proper fastening time for your
bolt. Especially for the bolt over than M12,
perform the above test operation to prevent the
trouble on socket or bolt, etc.
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.
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.
M16
(5/8")
M12X80
(1/2"X3-1/8")
M12
(1/2")
2 3 4 5 6
4. The use of the universal joint or the extension bar some-
what 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.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.

Replacing carbon brushes

► 1 . Limit mark
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.
► 1 . Brush holder cap 2. Screwdriver
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
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