Atlas Copco SB 52

Tightening torqueAdapter plate
240 NmSB 52
170 NmSB 102
170 NmSB 152
170 NmSB 202
170 NmSB 302
170 NmSB 302 SC
400 NmSB 452
400 NmSB 452 SC
400 NmSB 552
Connecting the breaker to the carrier
1. Position the breaker in a safe way during
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
boom you can cross the hoses or turn the
hydraulic breaker.
2. 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 must direct the movement of the
boom until the bores in the boom are flush with
those in the adapter.
Agree with the assistant on clear hand signals
for use during the mounting procedure.
3. Insert the pin and lock.
4. Lift up the hydraulic breaker using the boom.
5. Extend the bucket cylinder until the bore in the
toggle is flush with those in the adapter. Insert
toggle pin and lock.
6. 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.
Pressure adjustment
The hydraulic breaker is equipped with a pressure
relief valve which secures the breaker. The operating
pressure of the machine (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.
15© 2014 Construction Tools PC AB | No. 9800 0648 01l | 2014-06-11
Original instructions
Safety and operating instructionsSB 52, 102, 152, 202, 302, 302 SC, 452, 452 SC, 552