Makita HR2400 Instruction Manual page 7

Selecting action mode
This tool employs an action mode chang-
ing knob. Select one of three modes suit-
able for your work needs by using this
knob. For rotation only, turn the knob so
that the arrow on the knob points toward
the
-
mark on the tool body. For ham-
mering only, turn the knob so that the
arrow on the knob points toward the
b
mark on the tool body. For rotation with
hammering, turn the knob so that the
arrow on the knob points toward the
mark on the tool body.
L i o n
mode
changing knob
CAUTION :
The action mode changing knob may not be turned to your desired mode mark when the
tool is not running. In this case, pull the trigger switch half-way and turn the knob while
the tool is running under no load a t low speed.
Torque limiter
The torque limiter will actuate when a certain torque level is reached. The motor will dis-
engage from the output shaft. When this happens, the bit will stop turning.
CAUTION :
.As soon as the torque limiter actuates, switch off the tool immediately. This will help
prevent premature wear of the tool.
.Hole saws, core bits, diamond core bits, etc. cannot be used with this tool. They tend
to pinch or catch easily in the hole. This will cause the torque limiter to actuate too
frequently.
Hammer drilling operation
Position the bit a t the desired location for the hole, then pull the trigger. Do not force the
tool. Light pressure gives best results. Keep the tool in position and prevent it from slip-
ping away from the hole. Do not apply more pressure when the hole becomes clogged
with chips or particles. Instead, run the tool a t an idle, then remove the bit partially from
the hole.
By
repeating this several times, the hole will be cleaned out and normal drilling
may be resumed.
CAUTION
:
There is a tremendous and sudden twisting force exerted on the tool/bit a t the time of
hole breakthrough, 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.
Failure to do
so
may result in the loss of control of the tool and potentially severe injury.
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