Bosch GSH 16-28 PROFESSIONAL Instructions D'emploi page 15

Assembly
Carrying Handle
The carrying handle 3 can be turned to any position.
Loosen the knurled nut 4, turn the carrying handle 3
around the machine axis to the desired position and
tighten the knurled nut 4 again.
The carrying handle 3 can also be mounted facing to
the other side. Completely unscrew the knurled nut 4
and then pull out the hexagon bolt upward. Pull off the
carrying handle 3 to the side and tilt the remaining
clamping element by 180°. Mount the carrying handle
3 in reverse order.
Changing the Tool (GSH 16-28)
f Before any work on the machine itself, pull
the mains plug.
Clean the tool shank 7 and apply a light coat of grease.
Tools without Shoulder (see figures A–B)
Pivot the tool retainer 6 upward by approx. 150° and
insert the tool into the tool holder 8.
Pivot the tool retainer 6 down to lock the tool.
Check the latching by pulling the tool.
Tools with Shoulder (see figures C–D)
Tools with an insertion length of 152 mm (6") to the
shoulder can be used.
Pivot the tool retainer 6 upward by approx. 180° and
insert the tool into the tool holder 8.
Pivot the tool retainer 6 back to the tool to lock it. The
shoulder 9 must be held by the tool retainer 6.
Check the latching by pulling the tool.
Changing the Tool (GSH 16-30)
(see figures E–F)
f Before any work on the machine itself, pull
the mains plug.
Clean the tool shank 7 and apply a light coat of grease.
Pull out the lock bolt 5 and turn it 180° in anticlockwise
direction. Allow the lock bolt 5 to latch again.
Insert the tool into the tool holder 8 to the stop. The
groove of the tool shank 7 must face upward as shown
in the figure.
Pull out the lock bolt 5 and turn it 180° in clockwise
direction. Allow the lock bolt 5 to latch again.
Check the latching by pulling the tool.
1 619 929 711 • 13.7.06
Operation
Starting Operation
f Observe correct mains voltage! The voltage of
the power source must agree with the voltage
specified on the nameplate of the machine.
Power tools marked with 230 V can also be
operated with 220 V.
Switching On and Off
To start the machine, push the On/Off switch 2 to the
"I" position.
To switch off the machine, push the On/Off switch 2
to the "0" position.
For low temperatures, the machine reaches the full
impact rate only after a certain time.
This start-up time can be shortened by striking the
chisel in the machine against the floor one time.
Operating Instructions (see figure G)
While working, hold the power tool with both hands by
the handle 1. The handle 1 can move upward and
downward around its axis by approx. 30 mm. This has
a damping effect against vibrations.
For the highest possible impact damping, work only
with moderate pressure.
Sharpening Chisels
Good results are only achieved with sharp chisels;
therefore, sharpen the chiselling tools in good time.
This ensures a long service life of the tools and good
working performance.
Re-sharpening
Sharpen chiselling tools using grinding wheels (e. g.
ceramic bonded corundum wheel) with a steady supply
of water. Reference values are shown in the figure.
Take care that no annealing coloration appears on the
cutting edges; this impairs the hardness of the chisel-
ling tools.
60
4
60
20
For forging, heat the chisel to between 850 and
1050 °C (bright red to yellow).
For hardening, heat the chisel to approx. 900 °C and
quench in oil. Then anneal in an oven for approx. one
hour at 320 °C (annealing colour = light blue).
60
English | 15