Maintenance - Makita HM1200 Instruction Manual

OPERATING INSTRUCTIONS
Installing or removing bull point or other bits
(cold chisel, etc.)
Important:
Always be sure that the machine is switched off and
unplugged before installing or removing the bit.
For HM1200 (Fig. 1)
Pivot the tool retainer to the side. (If it is difficult to
move the tool retainer with your thumbs, tap it with a
hammer.) Insert the bit into the tool barrel as far as it
will go. Return the tool retainer to its original position
to secure the bit.
To remove the bit, follow the installation procedure in
reverse.
For HM1200B & HM1200K (Fig. 2)
Pull out and turn the tool retainer 180 degrees (1/2
turn). Then insert the bit into the tool holder with the
notched portion on the bit facing back toward the tool
retainer. Then pull out and turn back the tool retainer
180 degrees to secure the bit. Try to pull the bit out of
the tool holder to make sure the retained bit before
use.
CAUTION:
Never use B-type shank bits. They can cause dam-
age to the machine. (For HM1200B)
Side grip/Side handle (auxiliary handle)
For HM1200 (Standard type) (Fig. 3)
The side grip swings around to either side, allowing
easy handling of the machine in any position. Loosen
the side grip by turning it counterclockwise, swing it to
the desired position and then tighten it by turning
clockwise.
For HM1200 (European type), HM1200B & HM1200K
(Fig. 4)
The side handle swings around 360° on the vertical
as well as back and forth on the horizontal. Turn the
clamp nut clockwise to secure the handle in the
desired position.
Switch action (Fig. 5)
CAUTION:
• Before plugging in the machine, always check to
see that the switch trigger actuates properly and
returns to the "OFF" position when released.
• Do not tape, tie or otherwise secure the trigger in
the "ON" position.
To start the machine, simply pull the trigger. Release
the trigger to stop.
4
Chipping / Scaling / Demolition
Hold the machine firmly with both hands. Turn the
machine on and apply slight pressure on the machine
so that the machine will not bounce around, uncon-
trolled. Pressing very hard on the machine will not
increase the efficiency.

MAINTENANCE

CAUTION:
Always be sure that the machine is switched off and
unplugged before carrying out any work on the
machine.
Replacement of carbon brushes (Fig. 6 & 7)
Whenever carbon brushes must be replaced, they cut
out the machine automatically. When this occurs,
replace both carbon brushes at the same time. Use
only identical carbon brushes.
Lubrication (Fig. 8)
This machine requires no hourly or daily lubrication
because it has a grease-packed lubrication system.
Lubricate the machine every time the carbon brushes
are replaced.
Run the machine for several minutes to warm it up.
Switch off and unplug the machine. Remove the crank
cap using a Makita lock nut wrench 35 (optional
accessory). Rest the machine on the table with the bit
end pointing upwards. This will allow the old grease to
collect inside the crank housing. Wipe out the old
grease inside and replace with a fresh grease (30 g).
Use only Makita genuine grease (optional accessory).
Filling with more than the specified amount of grease
(approx. 30 g) can cause faulty hammering action or
machine failure. Fill only with the specified amount of
grease. Reinstall the crank cap and tighten with the
lock nut wrench. Do not tighten the crank cap exces-
sively. It is made of resin and is subject to breakage.
To maintain product safety and reliability, repairs,
maintenance or adjustment should be carried out by
Makita Authorized Service Center.
GUARANTEE
We guarantee Makita machines in accordance with
statutory/country-specific regulations. Damage attrib-
utable to normal wear and tear, overload or improper
handling will be excluded from the guarantee. In case
of complaint, please send the machine, undismantled,
with the enclosed GUARANTEE CERTIFICATE, to
your dealer or the Makita Service Center.