Malfunction and Remedies
Hydraulic valves
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Once the repair work is completed, the spring-loaded actuator must be activated as
follows:
– Unscrew again the emergency release nut with the ring wrench (5) counterclock-
wise with noticeable resistance.
– The housing must be closed using the screw-on cover again.
– After completing all work, perform a brake test.
ADVICE
The basic setting of the brake is not affected by the emergency release process!
8.12 Hydraulic valves
All hydraulic valves are electrically controlled. Problems with solenoid valves may be
detected using specific test cables, which are supplied with each machine. These test
cables may only be connected to the solenoid valves by trained and instructed spe-
cialist personnel.
Should an electrically controlled valve malfunction, then in any case, without excep-
tion, call in a specialist. Never try to shake the solenoid valve concerned to remedy
possible contact problems or a possible line break. If the valve is suddenly opened
during such tries, then the person concerned may suffer deadly injuries.
WARNING
Searching and remedying malfunctions on all components of the hydraulic system is
exclusively the task of trained specialists. We expressly warn of tries to repair or self-
performed tests on hydraulic valves under electro-magnetic control. If during such
tests or tries to repair, parts of the hydraulic system are suddenly put under pressure,
then this may trigger unwanted machine movement. This may pinch or even crush
people or body parts.
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