Maintenance work on the superstructure
8.6 Hydraulic system
07.12.2017
Maintenance manual 3 302 649 en 8 - 33
GMK4090
8.6.4 Checking for leaks
• Start the engine from the crane cab, so that the hydraulic pumps in the
superstructure also start running;
à Operating manual.
• When the engine is running, carry out a visual inspection for leaks on the
hydraulic components (tank, pumps, drives, cylinders, control blocks,
valves, pipe and hose lines and connections).
• If leaks are detected, check the oil level and top up if necessary;
à Check the oil level, p. 8 - 31.
After hydraulic components have been changed
• Bleed the hydraulic system; à Establishing the operating condition,
p. 8 - 44.
If damage cannot be rectified immediately or further damage is likely
• Notify Manitowoc Crane Care or an authorised GROVE dealer or your repair
crew.
G
Risk of accidents from hydraulic oil spraying out
Never tighten any leaking connections when the system is under pressure.
Change pipes and hose lines only when the system is depressurised.
O
Risk of environmental damage due to leaking consumables
Immediately repair leaks in the hydraulic system or have them repaired to
ensure that no hydraulic oil escapes, seeps into the ground or reaches
waterways when the crane is used.
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