Water Pressure; Drill Steel; Operation; Preparations Before Starting - Atlas Copco 72D Instrucciones De Seguridad Y De Funcionamiento

ALF 72D, 72D-1, 67/80D, BMK 62S, BMK 91RS

Water pressure

The water pressure must be at least 1 bar (14.5 psi)
lower than the air pressure otherwise water can enter
the impact mechanism. For example if the air
pressure is 6 bar (87 psi), the water pressure must
be below 5 bar (72.5 psi) to prevent water entering
the impact mechanism.

Drill steel

Operation

WARNING Involuntary start
Involuntary start of the machine may cause injury.
Keep your hands away from the start and stop
►
device until you are ready to start the machine.
Learn how the machine is switched off in the event
►
of an emergency.
► Stop the machine immediately in all cases of
power supply interruption.

Preparations before starting

Check the drilling equipment

♦ Check that all of the drilling equipment is in good
condition.
♦ Check that the impact surface of the drill steel
shank is flat, with no signs of wear.
♦ Make sure that the air inlet and exhaust ports are
free from obstructions.
♦ Check that the flushing holes in the drill steel and
drill bit are not blocked, and that the flushing air
and water flows through without obstruction.
♦ Make sure that the air filter (located in the air
nipple) is clean and not torn or distorted.
♦ Ensure that the fittings are tight and leak-proof.
DANGER Whipping air hose
A compressed air hose that comes loose can lash
around and cause personal injury or death
► Check that the compressed air hose and the
connections are not damaged.
Check that all compressed air connections are
►
properly attached.

Blow out the air hose

♦ Every day before using the drill, blow out the air
hose to clear it of accumulated dirt and moisture.
© 2012 Atlas Copco Construction Tools AB | No. 9800 0680 90c | 2012-07-04
Original instructions
Safety and operating instructions

Fill the lubricator with oil

♦ Check that the chuck and insertion tool shank are
always covered with a film of oil.

Controls

For ALF 72D, ALF 72D-1, ALF 67/80D and
BMK 91RS

Pusher leg feed control knob

B
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

V
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, e.g. to adjust
the height of the rock drill, when rigging up the pusher
leg, or when there is a tendency to jam. When the
A
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