Maintenance; Replacing Carbon Brushes - Makita HM0830 Instruction Manual

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.

Replacing carbon brushes

When the resin insulating tip inside the carbon brush is
exposed to contact the commutator, it will automatically
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. (Fig. 5)
Use a screwdriver to remove the rear cover. (Fig. 6)
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. 7)
Reinstall the rear cover firmly.
Lubrication
This tool requires no hourly or daily lubrication because it
has a greasepacked lubrication system. It should be relu-
bricated after every 6 months of operation. Send the com-
plete tool to Makita Authorized Service Center for this
lubrication service. However, if circumstances require that
you should lubricate it by yourself, proceed as follows.
Run the tool for several minutes to warm it up. Switch off
and unplug the tool.
Remove the crank cap using a hex wrench. Rest the tool
on the table with the bit end pointing upwards. This will
allow the old grease to collect inside the crank housing.
(Fig. 8)
Wipe out the old grease inside and replace with a fresh
grease (30 g). Use only Makita genuine hammer grease
(optional accessory). Filling with more than the specified
amount of grease (approx. 30 g) can cause faulty ham-
mering action or tool failure. Fill only with the specified
amount of grease. (Fig. 9)
Reinstall the crank cap and tighten hex bolts firmly with
the hex 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.
6
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.
• Bull point
• Cold chisel
• Scaling chisel
• Clay spade
• Grooving chisel
• Rammer
• Bushing tool
• Ground rod adapter
• Bit grease
• Hex wrench
• Safety goggles
• Hammer grease
• Plastic carrying case
• Lock nut wrench 35
• Barrel cover