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Safety and operating instructions
(A) Throttle valve closed (stop position).
♦
Blow-cleaning only.
(B) Air to the feed cylinder.
♦
(C) Opening air to the water valve.
♦
♦
(D) Throttle lever and water valve fully open.
Pusher leg feed control knob
Adjust the feed force using the feed control knob as
follows:
Turn the knob anti-clockwise (B) to increase the
♦
feed force.
Turn the 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 (V) 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 piston rod in
the pusher leg is retracted automatically.
18
Start and stop
Starting the rock drill
1. Open the main valve for compressed air.
2. Make sure that the water hose is pressurized
that the machine receives flushing water.
3. Adjust the feed control knob (C) to give a suitable
feed force for collaring the hole.
4. Align the rock drill so that the drill steel touches
the required collaring point.
5. Move the throttle lever (A) forward a little, which
will start the water flushing, the percussion and
rotation.
6. Collar the hole with reduced feed force.
7. Move the throttle lever (A) fully forward once the
drill steel has gained a secure footing in the rock.
8. Adjust the feed force by means of the control
knob (C) so that the maximum penetration rate
is obtained.
© 2010 Atlas Copco Construction Tools AB | No. 9800 0829 71a | 2010-01-01
BBC 34WS-6, 34WS-8
Original instructions
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