Repair Manual for Wheel Loader WL 30 - Wacker Neuson

WL 30 - 10/2008-1 (WDF-7019-00EN) 1000239425 - WDF-6001-00EN
Hydraulic system 3
Safety instructions for working on the hydraulic
system
3Hydraulic system
Only trained experts with special knowledge and experience may work on
hydraulic equipment.
Residual pressure decreases only gradually! Even when the loader is
parked on a horizontal surface with its lift frame lowered and its engine
switched off, there can still be significant residual pressure in parts of the
hydraulic system.
Depressurize the system before carrying out repair work on the hydraulic
system (see the section "Depressurizing the hydraulic system" in Part 4).
Leaks from which oil escapes must be repaired in order to prevent the following
hazards:
Environmental hazard
Fire hazard
Slip hazard
Explosion hazard
Injury hazard
Caution: Injury hazard! A fine, pressurized jet of hydraulic fluid can penetrate
the skin! Seek immediate medical attention if oil gets in your eyes or
penetrates your skin.
Do not search for leaks using your hands! To trace a leak, use a piece of
card or paper that shows up sprayed-out oil.
Do not repair damaged pipelines and hydraulic hoses. Instead, replace
them immediately with new ones even if only the penetration of dampness
is visible.
Hydraulic hoses must be replaced after a service life of six years.
Open hydraulic connections with care, so that you can react if large quantities
of oil escape.
Do not open damaged pre-tensioned units (e.g. hydraulic accumulators)!
Always replace them completely instead.
Use only suitable vessels to collect hydraulic oil.
Dispose of escaped oil and waste containing oil in an environmentally
responsible manner.
Handle O-rings, Q-rings and gaskets with particular care.
Replace damaged or lost O-rings, Q-rings and gaskets immediately.
Hydraulic lines must be laid and installed correctly! This work may only be
done by authorized experts. Ensure that no connections are mixed up. The
fittings, length and quality - particularly the pressure and temperature resistance
of hydraulic lines - must meet requirements.
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