Makita HM1801 Instruction Manual page 6

(2) For bits without a collar
► Fig.5: 1. Notched portion 2. Tool retainer shaft
3. Barrel 4. When the bit is inserted 5. When
the bit is retained
Pivot the tool retainer front and slightly downward.
With the notched portion of the bit facing the tool
retainer shaft, insert the bit into the tool holder as
far as it will go. Then pivot the tool retainer further
downward toward the barrel to securely retain
the bit.
CAUTION:
• Always assure that the bit is securely retained
by attempting to pull the bit out of the tool holder
after completing the above procedure.
• The bit without a collar cannot be retained by
the method shown in Fig.(1).
To remove the bit, follow the installation procedure in
reverse.
OPERATION
Chipping/Scaling/Demolition
Hold the tool firmly with both hands. Turn the tool on
and apply slight pressure on the tool so that the tool will
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 inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
Replacing carbon brushes
► Fig.6: 1. Commutator 2. Insulating tip 3. Carbon
brush
When the resin insulating tip inside the carbon brush
is exposed to contact the commutator, it will automati-
cally shut off the motor. When this occurs, both carbon
brushes should be replaced. 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 hex wrench to remove the motor housing cover.
► Fig.7: 1. Hex wrench 5 2. Motor housing cover
Remove the cap rubber.
► Fig.8: 1. Cap rubber
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.
► Fig.9: 1. Brush holder cap 2. Screwdriver
Lubrication
► Fig.10: 1. Cap 2. Lock nut wrench 20
► Fig.11: 1. Cap 2. Hex wrench 8
This tool requires no hourly or daily lubrication because
it has a grease-packed lubrication system. It should be
relubricated after every 6 months of operation. Send the
complete tool to Makita Authorized or Factory Service
Center for this lubrication service. However, if circum-
stances require that you should lubricate it by yourself,
proceed as follows.
First, switch off and unplug the tool.
Remove the cap using a lock nut wrench 20 or hex
wrench 8, then replenish with fresh grease (60 g).
Use only Makita genuine hammer grease (optional
accessory). Filling with more than the specified amount
of grease (approx. 60 g) can cause faulty hammering
action or tool failure. Fill only with the specified amount
of grease.
► Fig.12: 1. Hammer grease
Reinstall the cap and secure with the wrench.
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.
OPTIONAL
ACCESSORIES
CAUTION:
• These accessories or attachments are recom-
mended 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 regard-
ing these accessories, ask your local Makita Service
Center.
• Bull point
• Cold chisel
• Scaling chisel
• Clay spade
• Rammer
• Safety goggles
• Hammer grease
• Hex wrench
• Lock nut wrench
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
differ from country to country.
6 ENGLISH