Gear Shifting - Bosch HDH181 Operating/Safety Instructions Manual

BM 2610013588 03-11:BM 2610013588 03-11 3/10/11 9:24 AM Page 11
VARIABLE SPEED CONTROLLED
TRIGGER SWITCH
Your tool is equipped with a variable speed
trigger switch. The tool can be turned "ON" or
"OFF" by squeezing or releasing the trigger.
The speed can be adjusted from the minimum
to maximum nameplate RPM by the pressure
you apply to the trigger. Apply more pressure
to increase the speed and release pressure to
decrease speed (Fig. 1).
FORWARD/REVERSING
LEVER & TRIGGER LOCK
After tool use, lock trigger in
WARNING
"OFF" position to help prevent
accidental starts and accidental discharge.

GEAR SHIFTING

Your tool is equipped with two separate gear
ranges, low gear and high gear. Low gear
provides high-torque and slower drilling
speeds for heavy duty work or for driving
screws. High gear provides faster speeds for
drilling lighter work. To change speeds slide
switch, to the high or low position (Fig. 6).
ATTENTION: If your tool appears to be
running, but the chuck will not turn, check to
make sure the gear shifting switch is pushed
fully into desired setting.
Operating Instructions
Your tool is equipped with a forward/
reversing lever and trigger lock located above
the trigger (Fig. 4). This lever was designed
for changing rotation of the bit, and for locking
the trigger in an "OFF" position.
For forward rotation, (with chuck pointed
away from you) move the lever to the far left
(Fig. 4).
For reverse rotation move the lever to the far
right (Fig. 5). To activate trigger lock move
lever to the center off position.
comes to a complete stop. Shifting during
rotation of the chuck can cause damage to
the tool.
FIG. 4
-11-
Do not change direction of
CAUTION
rotation until the tool
FIG. 6
GEAR
SHIFTER
FIG. 5