Maintenance - Makita HR4003C Instruction Manual

CAUTION:
There is a tremendous and sudden twisting force
•
exerted on the tool/bit at the time of hole break-
through, when the hole becomes clogged with
chips and particles, or when striking reinforcing
rods embedded in the concrete. Always use the
side grip (auxiliary handle) and firmly hold the tool
by both side grip and switch handle during
operations, and maintain good balance and safe
footing. Failure to do so may result in the loss of
control of the tool and potentially severe injury.
Blow-out bulb (optional accessory)
002449
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition
014031
Set the change lever to the
Hold the tool firmly with both hands. Turn the tool on
and apply slight pressure on the tool so that the tool
does not bounce around, uncontrolled. Pressing very
hard on the tool will not increase the efficiency.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before attempting to perform inspection
or maintenance.
Never use gasoline, benzine, thinner, alcohol or
•
the like. Discoloration, deformation or cracks may
result.
1. Blow-out bulb
1
or symbol.
Lubrication
CAUTION:
This servicing should be performed by Makita
•
Authorized or Factory Service Centers only.
Do not perform lubrication just after the operation,
•
wait until the tool cools down. Otherwise skin burn
may result.
This tool requires no hourly or daily lubrication because
it has a grease-packed lubrication system. However, it is
necessary to replace grease and carbon brushes
periodically for tool's long life.
1
014035
(For model HR4003C, HR5202C) Loosen the six screws
and remove the handle.
1
014037
014075
(For model HR4013C, HR5212C) Loosen the eight
screws. And remove the guard cover as shown in the
figure. And then remove the handle.
9
1. Screws
1
1. Screws
1
1. Guard cover
1