Attaching The Pusher Leg To; The Rock Drill; Controls; Throttle Lever - Atlas Copco ALF 71 Instrucciones De Seguridad Y Funcionamiento

Safety and operating instructions

Attaching the pusher leg to

the rock drill

The pusher leg must be fixed to the rock drill by means
of the bayonet coupling.

Controls

Throttle lever

The rock drill is equipped with a throttle lever
for regulating both the compressed air to the
percussion mechanism and the flushing water.
A Throttle valve closed (stop position)
Blow-cleaning only
B Air to pusher leg
C Flushing water
D Air to percussion mechanism
E Throttle lever fully open (full throttle)
F Extra blowing
12
ALF 71, ALF 71-1, ALF 67/80, BMT 51

Feed control lever

Adjust the feed force by means of the feed control
lever as follows:
► Turn the lever clockwise (B) to increase the feed
force.
► Turn the lever counter-clockwise (A) to decrease
the feed force.
► When the feed control lever is in the closed
position (A), the pusher leg is vented.

Valve pin

When the valve pin is pushed in, the feed force
stops abruptly and the setting on the feed control
lever is overridden. The piston rod in the pusher
leg retracts automatically. This function 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 feed control setting is activated again.
© 2010 Atlas Copco Construction Tools AB
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No. 9800 0681 71b 2012-07-05
Original instructions