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OPERATION
before squeezing the trigger. As with hammer drilling, do
not exert heavy pressure on the tool. Press lightly.
The rotary motion of the hammer drill does not stop when
chiselling. The bull-point chisel turns during chiselling.
When the chisel is withdrawn from the work surface, the
percussion action of the hammer drill stops.
Bull-point chisels that become blunt can be sharp ened on a
grinding machine.
COLD WEATHER OPERATION
If the drill is to be used during cold weather, preheat the
hydraulic fl uid at low engine speed. When using the nor-
mally recommended fl uids, fl uid tempera ture should be at
or above 50°F/10°C (400 SSU/ 82 centistokes) before use.
Damage to the hydraulic system or drill can result from use
with fl uid that is too viscous or too thick.
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