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Safety and operating instructions
Controls
Throttle lever
The pusher leg rock drill is equipped with a throttle
lever for regulating both the compressed air to the
percussion mechanism and the flushing water. The
pusher leg rock drill is also equipped with a blower
lever that gives extra flushing if necessary.
A.
Throttle valve closed (stop position).
Blow-cleaning only.
Throttle lever and water valve fully open.
B.
Blower valve closed (stop position).
C.
D.
Blower lever fully open.
Pusher leg feed control knob
Adjust the feed force using the feed control knob as
follows:
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Turn the feed control knob anti-clockwise (B) to
♦
increase the feed force.
Turn the feed control knob clockwise (A) to
♦
decrease the feed force.
When the feed control knob is in the closed
♦
position (A), the pusher leg is vented.
Valve pin
When the valve pin (A) is pushed in, the feed force
ceases abruptly, thus overriding the setting on the
feed control knob. The facility is used, for example
to adjust the height of the rock drill, when rigging up
the pusher leg, or when there is a tendency to jam.
When the valve pin is depressed, the air pressure in
the pusher leg drops and it can be retracted
manually.
RH 656W
Original instructions
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