Vexve Hydrox HCU Remote Installation, Operation And Maintenance Instructions page 5

Hose impact hazard
Pressurized bent hoses tend to straighten and straight hoses start to yaw due to the react-
ing force of the free fluid discharge. Hoses are the weakest components of a hydraulic
system. Always replace old hoses in due time.
Safety during maintenance and repair
The hydraulic system must primarily be depressurized for maintenance and repair. Maintenance during
operation is permitted only where the hydraulic system is designed for such maintenance.
If the system includes pressure accumulators, disassemble the accumulators prior to starting any mainte-
nance work.
When starting maintenance and repair work where the system is first depressurized, to avoid indirect
damage, make sure that it is safe to stop the hydraulic system.
After stopping the pumps and prior to starting any work, always eliminate the possibil-
ity of accidental start-up by locking the safety switches of electric motors or, in the
absence of safety switches, by removing the motor fuses. Always place nameplates
at the secured safety switches and removed fuses, identifying the person who carried
out the procedure. Safety locks may only be removed by the person who put them in
place.
Prior to starting any work, make sure that the system section to be serviced is depres-
surized, i.e. the pressure accumulators, pipeline and actuators are unpressurized.
The system is not allowed to be under load during maintenance situations!
Use appropriate tools and methods for all repair and maintenance work. Avoid spilling oil on the floor and
remove all oil from the floor immediately. Tighten disconnected pipe and hose couplings immediately after
installation. Prior to completing your work, check and retighten all couplings of the system section that
was serviced or repaired.
Prior to starting any pumps, make sure that the system is not undergoing any other maintenance work.
Maintain a safety distance to the items repaired when starting up the pumps. Before switching the hy-
draulic system on, make sure that there are no open connections in the system anymore. Make sure also
that no one is working between different parts because pressuring the system might cause movements in
the system.
When the system is again under pressure, the repaired system section must be tested.
Check the system for possible leaks after repair. Do not tighten leaking couplings while the system is
pressurized.
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