Pressure Adjustment; Water Flushing - Atlas Copco SB Serie Instrucciones De Seguridad Y De Funcionamiento

SB 52, 102, 152, 202, 302, 452, 552
Connecting the breaker to the carrier
3. Place the breaker in a safe way at installation.
The pressure inlet on the hydraulic breaker is on
the left side when you are facing the accumulator.
If the pressure hose is on the other side of the
dipper arm you can cross the hoses or turn the
hydraulic breaker.
4. Carefully lower the stick of the boom into the
adapter.
WARNING Moving parts can crush and
cut
Never check bores or passages with hands or
►
fingers.
An assistant should direct the movement of the
dipper arm until the bores in the dipper arm are
flush with those in the adapter.
Agree with the assistant on clear hand signals
for use during the mounting procedure.
5. Insert the pin and lock.
6. Lift up the hydraulic breaker using the boom.
7. Extend the bucket cylinder until the bore in the
toggle is flush with those in the adapter. Insert
toggle pin and lock.
8. After mounting the breaker, carefully extend and
retract the bucket cylinder to its full extent in each
direction. It is important that the cylinder can be
fully extended and retracted without any difficulty.
© 2008 Atlas Copco Construction Tools AB | No. 9800 0648 90e | 2008-11-03
Safety and operating instructions

Pressure adjustment

SB breakers are equipped with a pressure relief valve
which secures the breaker. The operating pressure of the hydraulic breaker (max 150 bar) is checked
and adjusted by a pressure gauge while operating
the hydraulic breaker.
● If the operating pressure is more than 150 bar the
pressure must be decreased. Reduce the oil flow
from the carrier until the pressure is down to 150
bar. This adjustment is important to ensure that
the built in pressure relief valve in the breaker does
not open and leak oil back to the tank and create
heating problems.
If the operating pressure is between 130–150 bar,
●
normally no adjustment is needed.
If the carrier's oil flow is too low to retain an
●
acceptable operating pressure the restrictor in the
breaker needs to be changed. See flow diagrams
in "Technical data" to choose the best restrictor
for your application.
Position the hydraulic breaker vertically towards solid
bedrock or similar to adjust the pressure using a
pressure gauge.

Water flushing

The hydraulic breaker is prepared for water flushing,
this function is to bind the dust when performing
demolition operations.
When connecting water flushing the plug in the front
of the breaker must be exchanged with a water
nozzle. See the Spare parts list for ordering a new
water nozzle.
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