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.
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.
Use a ¼ in. hydraulic hose with a JIC connection
as a proper water hose. Contact your nearest
authorised workshop for further instructions.
NOTICE It is recommended to use water flushing
to reduce the wear on the hydraulic breaker during
tunnel and dust-intensive applications.
Working tool
Selecting the right working tool
Conical moil point
•
Very good
penetration
•
Regular spread of
wedge action
•
No torsion effect
Chisels and spades
•
Very good spread of
wedge action
•
Good penetration
•
Torsion effect
Blunt tool
•
Very good energy
application
•
Optimum breaking
effect
•
No torsion effect
Changing the working tool
WARNING Running engine
Changing the inserted tool or accessories while the
carrier's engine is running can cause serious injury.
►
Secure the carrier against involuntary
activation.
1. Shut the carrier's engine off.
2. Dismount the working tool, use a lifting strap to
reduce the risk of personal injury.
SB 52, 102, 152, 202, 302, 302Tunnel, 452, 452Tunnel,
552
Safety and operating instructions
© Construction Tools PC AB | 9800 0648 01 | 2018-01-01
Original instructions
15
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