Maintenance; Replacing The Carbon Brushes - Makita DHP446 Instruction Manual

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
the battery cartridge is removed before attempt-
ing to perform inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.

Replacing the carbon brushes

► 1. Limit mark
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 two screws then remove
the rear cover.
► 1. Rear cover 2. Screw
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screw-
driver with a slender shaft or the like.
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9 ENGLISH
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► 1. Recessed part 2. Spring 3. Arm
Use pliers to remove the carbon brush caps of the
carbon brushes. Take out the worn carbon brushes,
insert the new ones and replace the carbon brush caps
in reverse.
► 1. Carbon brush cap
Make sure that the carbon brush caps have fit into the
holes in brush holders securely.
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► 1. Hole 2. Carbon brush cap
Reinstall the rear cover and tighten two screws securely.
After replacing brushes, insert the battery cartridge into
the tool and break in brushes by running the tool with
no load for about 1 minute. Then check the tool while
running and electric brake operation when releasing the
switch trigger. If the 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 performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
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