SERVICING AND INSPECTION
141
WL50
Residual pressure in the hydraulic system
Personal injury hazard.
Pressurized jets of uid can penetrate human skin. •
In the event that oil penetrates the skin, seek immediate medical attention to reduce the risk of infection and •
complications from infection.
Conrm that the hydraulic system pressure has been relieved before attempting to repair the system or
•
component.
Even for a loader parked on a horizontal surface with its loader lift arms completely lowered and engine turned
•
off, there can still be considerable residual pressure in parts of the hydraulic system.
Residual pressure reduces gradually at rst. If a hydraulic system is to be opened immediately after being
•
shut down, the system shall be relieved before repairs are attempted. Do not attempt to work on the system
if the components are not comfortable to touch. Hot surfaces and liquids can cause severe burns.
For loaders with load holding control devices on the lifting and/or tipping cylinder, you must open the valves •
as described in Section 8, page 134 »Relieving residual pressure in the hydraulic system« in order to lower
the loader lift arms.
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