Malfunctions during crane operation
14.7 Hydraulic emergency operation as per BGR 159
14 - 66 3 302 736 en Operating manual
GMK4090
xx.xx.xxxx
For lifting/
lowering
After establishing hydraulic circuits, switch one additional valve to continu-
ous operation.
Switching on continuous operation
Always switch only one valve to continuous
operation.
• Screw off the cap (3), e.g. off valve (1).
• Remove the plug (5).
• Screw the cap with pin (4) on to the valve –
continuous operation is now switched on.
Switching off continuous operation
• Remove the cap (3) from the actuated
valve (1), (2).
• Screw the cap on so that the pin (4) can be
seen.
• Insert the plug (5).
1 Valve Y1104 –
Lowering or
2 Valve Y1105 –
Lifting
S
Danger due to falling loads
Switch off continuous operation immediately after emergency activation.
Check whether the pins can be seen on both caps.
Thus you prevent loads falling down immediately after lifting in subse-
quent crane operation.
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