Maintenance - Makita HR2400 Instruction Manual

Operating instruction (Fig. 5)
Important:
Before plugging in the machine, always check to see
that the switch trigger actuates properly and returns to
the ''OFF'' position when released.
Switching ON and OFF (Fig. 5)
To switch on, press the trigger.
To switch off, release the trigger.
Continuous running (Fig. 5)
Press the trigger and at the same time slide the lock
lever upward. To stop from this lock position, press
the trigger and release it.
Variable trigger speed control (Fig. 5)
The speed varies from 0 to maximum, depending on
the pressure applied to the trigger. The more the
trigger is pressed, the faster the machine runs.
Reversing switch (Fig. 5)
Important:
Only reverse the direction of rotation when the motor
stops completely.
To change the direction of rotation:
Position FWD: right hand rotation
Position REV: left hand rotation
Three selecting action modes (Fig. 6)
For hammer drilling:
Turn the knob so that the arrow points toward the
symbol.
For drilling only:
Turn the knob so that the arrow points toward the
symbol.
For hammering only:
Turn the knob so that the arrow points toward the
symbol.
NOTE:
When it is hard to turn the knob, pull the switch trigger
half-way for running at low speed and turn the knob.
Torque limiter
The torque limiter will actuate when a certain torque
level is reached. The motor will disengage from the
output shaft. When this happens, the bit will stop
turning.
CAUTION:
As soon as the torque limiter actuates, switch off the
machine immediately. This will help prevent prema-
ture wear of the machine. Hole saws, core bit, dia-
mond core bit, etc. cannot be used with this machine.
They tend to pinch or catch easily in the hole. This will
cause the torque limiter to actuate too frequently.
Using cold chisel or bull point (Fig. 7)
1. Disconnect plug.
2. Remove the side grip from the machine.
3. Turn the knob to hammer drilling symbol
4. Install the cold chisel or bull point and then the
chisel adapter (optional accessory) on the
machine.
5. Rotate the cold chisel toward the direction suitable
for your work. Then secure the cold chisel and
chisel adapter by using the clamp screw on the
chisel adapter.
6. Turn the knob to hammering only symbol
Now you can use the cold chisel or bull point.
NOTE:
Always set ''hammering only'' action when using the
cold chisel or bull point. If you use ''hammer drilling''
or ''drilling only'' action, the hammering mechanism
may be damaged on the machine.
Drilling in wood or metal (Fig. 8)
Use the optional drill chuck assembly (consisting of
drill chuck and chuck adapter assembly). When
installing it, refer to ''installing or removing drill bit''
described on the previous page. Set the knob to
''drilling only''. You can drill up to 13 mm diameter in
metal and up to 38 mm diameter in wood. (Note:
When using a flat boring bit.)
NOTE:
Never set ''hammer drilling'' action when using the
drill chuck assembly because it may be damaged and
come off when reversing the machine.

MAINTENANCE

CAUTION:
Always be sure that the machine is switched off and
unplugged before carrying out any work on the
machine.
To maintain product safety and reliability, repairs,
maintenance or adjustment should be carried out by
Makita Authorized Service Center.
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