Epiroc SBU 220 User Manual

Safety and operating instructions
© Construction Tools PC AB | 9800 0908 01 | 2023-05-12
Original Instructions
15
5.4 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 (2176psi)) is checked and
adjusted by a pressure gauge while operating the hy-
draulic breaker.
n
If the operating pressure is more than 150bar
(2176psi) the pressure must be decreased. Reduce
the oil flow from the carrier until the pressure is down
to 150bar (2176psi). 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.
n
If the operating pressure is between 130–150 bar
(1886-2176psi), normally no adjustment is needed.
n
If the carrier's oil flow is too low to retain an accept-
able operating pressure the restrictor in the breaker
needs to be changed. See flow diagrams in "Techni-
cal data" to choose the best restrictor for your appli-
cation.
Position the hydraulic breaker vertically towards solid
bedrock or similar to adjust the pressure using a pres-
sure gauge.
5.5 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 re-
duce the wear on the hydraulic breaker during tunnel
and dust-intensive applications.
5.6 Working tool
5.6.1 Selecting the right working tool
5.6.1.1 Conical moil point
• Very good penetra-
tion
• Regular spread of
wedge action
• No torsion effect
5.6.1.2 Chisels and spades
• Very good spread of
wedge action
• Good penetration
• Torsion effect
5.6.1.3 Blunt tool
• Very good energy ap-
plication
• Optimum breaking ef-
fect
• No torsion effect
5.6.2 Changing the working tool
WARNING Running engine
Changing the inserted tool or accessories while the car-
rier's engine is running can cause serious injury.
u Secure the carrier against involuntary activation.

Epiroc SBU 220 Specifications

General

Brand	Epiroc
Model	SBU 220
Category	Industrial Equipment
Language	English