Operating Instructions - Bosch PBH 2800 RE Operating Instructions Manual

Switching On and Off
To start the machine, press the On/Off switch 8.
To lock the On/Off switch, keep it pressed and addi-
tionally push the lock-on button 7.
To switch off the machine, release the On/Off switch
8. When the On/Off switch 8 is locked, press it first and
then release it.
Setting the Speed/Impact Rate
The speed/impact rate of the switched on power tool
can be variably adjusted, depending on how far the
On/Off switch 8 is pressed.
Light pressure on the On/Off switch 8 results in low
speed/impact rate. Further pressure on the switch
increases the speed/impact rate.
Preselecting the Speed/Impact Frequency
The required speed can be preselected with the
thumbwheel 9 (also while running).
Due to the limitation, the On/Off switch 8 can only be
pulled through to the preset limit.
Gear Selection, Mechanical (PBH 3000-2 FRE)
Two speed ranges can be preselected with the gear
selector 13.
1st gear:
Low speed range; for hammer drilling, chiselling, drill-
ing with large drilling diameter, screwdriving and thread
cutting.
2nd gear:
High speed range; for drilling with small drilling diameter.
To change gear, push the release button 11 on the
mode selector switch 12 and turn the mode selector
switch to the "drilling" position. Then push the release
button 14 on the gear selector 13 and turn the gear
selector to 2nd gear.
Note: The mode selector switch 12 may only be turned
when the machine is switched off. The machine should
also be switched off when turning the gear selector 13.
Hammer drilling and chiselling is possible only in 1st
gear. In these operating modes, the special shape of
the gear selector 13 and mode selector switch 12 do
not allow switching to 2nd gear.
Before changing the operating mode from drilling to
hammer drilling, Vario-Lock or chiselling, the gear
selector 13 must be set back to 1st gear.
22 | English
Overload Clutch
If the tool insert becomes caught or jammed,
the drive to the drill spindle is interrupted.
Because of the forces that occur, always hold
the power tool firmly with both hands and
provide for a secure stance.
If the power tool jams, switch the machine off
and loosen the tool insert. When switching
the machine on with the drilling tool jammed,
high reaction torques can occur.

Operating Instructions

Changing the Chiselling Position (Vario-Lock)
The chisel can be locked in 36 positions. In this man-
ner, the optimum working position can be set for each
application.
Insert the chisel into the tool holder.
Turn the mode selector switch 12 to the "Vario-Lock"
position (see "Setting the Operating Mode", page 21).
Turn the tool holder to the desired chiselling position.
Turn the mode selector switch 12 to the "chiselling"
position. The tool holder is now locked.
For chiselling, set the rotation direction to right rotation.
Inserting Screwdriver Bits (see figure N)
Apply the power tool to the screw/nut only
when it is switched off. Rotating tool inserts can
slip off.
To work with screwdriver bits, a universal bit holder 32
with SDS-plus shank (accessory) is required.
Clean the shank end of the adapter shank and apply a
light coat of grease.
Insert the universal bit holder with a turning motion into
the tool holder until it automatically locks.
Check the locking effect by pulling the universal bit
holder.
Insert a screwdriver bit into the universal bit holder. Use
only screwdriver bits that match the screw head.
To remove the universal bit holder, pull the locking
sleeve 5 toward the rear and remove the universal bit
holder 32 out of the tool holder.
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