Methods To Prevent Freezing; Connecting A Water Separator; Lubrication; Pressure Adjustment - Atlas Copco BBC 34-DSI Instrucciones De Seguridad Y De Funcionamiento

Safety and operating instructions

Methods to prevent freezing

Ice formation in the silencer can occur when the
ambient air temperature is 0–10°C (32-50 °F) and
the relative humidity is high.
The machine is designed to avoid the formation of
ice in the silencer. Despite this, under extreme
conditions ice can form in the silencer.
Take the following actions to further counteract the
risk of ice formation:
Use Atlas Copco Rock Drill AIR-OIL as a lubricant.
♦
♦ Use VAM 5A water separator.
If the rock drill freeze, never heat it to melt the ice.
Always let the ice thaw at room temperature.
Never pour methylated spirits or similar substances
into the rock drill, as they will interfere with the
lubrication and lead to increased wear.

Connecting a water separator

The length of the air hose between the compressor
and the water separator must be such that the water
vapor is cooled and condenses in the hose before
reaching the water separator.
If the ambient temperature is below 0 °C (32 °F) the
hose must be short enough to prevent the water from
freezing before reaching the water separator.

Lubrication

The rock drill is lubricated with oil mixed with
compressed air, which is taken to the parts that need
continuous lubrication. Oil is metered into the
compressed air using an Atlas Copco BLG 30 or
CLG 30 lubricator connected to the air line.
Use Atlas Copco Rock Drill AIR-OIL which is
specially developed for BBC, BBD and RH pneumatic
Rock drills. Rock Drill AIR-OIL is readily
biodegradable according to OECD 301 and has high
film strength that can withstand heavy loads. If Rock
Drill AIR-OIL is not available use a mineral-based air
tool oil with the properties recommended in the table
below.
Temperature range °C
(°F)
-30 to 0 (-22 to +32)
-10 to +20 (+14 to +68)
+10 to +50 (+50 to +122)
16
Viscosity grade (ISO
3448)
ISO VG 32-68
ISO VG 68-100
ISO VG 100-150
© 2012 Atlas Copco Construction Tools AB | No. 9800 0678 71b | 2012-08-10

Pressure adjustment

Air pressure

Ensure that the compressor can deliver the required
air pressure of 4–6 bar (58 – 87 psi) to the machine.
1. High pressure causes rough operation and
excessive wear.
2. Low pressure results in a slow drilling speed.

Calibrate the correct air pressure

Use the Atlas Copco (9090 0550 80) pressure gauge
to check the air pressure when the rock drill is
running. The pressure should be measured close to
the inlet nipple. Recommended operating pressure
is 6 bar (87 psi).
The pressure gauge is equipped with a needle which
is pressed into the hose to measure the pressure
inside.

Water pressure

If the machine is converted to water flushing, the
water pressure must be at least 1 bar lower than the
air pressure otherwise water can enter the impact
mechanism. For example if the air pressure is 6 bar,
the water pressure must be below 5 bar to prevent
water entering the impact mechanism.

Drill steel

WARNING Ejected insertion tool
If the tool retainer on the machine is not in a locked
position, the inserted tool can be ejected with force,
which can cause personal injury.
► Before changing the insertion tool, stop the
machine, switch off the compressed air supply
and bleed the machine by activating the start and
stop device.
BBC 34-DSI
Original instructions