Manitowoc GROVE GMK7450 - Page 279

Maintenance work on the superstructure
8.10 Hydraulic system
16.08.2018
Maintenance manual 3 302 577 en 8 - 77
GMK7450
The gauge port (1) is mounted on the con-
trol block (2). When a hydraulic function is
run, e.g.
tilting the crane cab, oil can then be
taken at the gauge port.
• First consult the Tilting the crane cab section
of the operating instructions for operating
instructions and safety instructions.
Taking oil samples
• Clean the gauge port and connect the
hose (1) at the port (3);
à Connecting the
hose
, P. 7 - 93.
• Put the hose end (2) into the receptacle (4).
• Start the engine.
• Tilt the crane cab.
• Allow 2 litres (0.5 gal)of oil to flow into the
receptacle.
• Switch the engine off and put the hose end (2)
into the sample container (5).
• Start the engine.
• Tilt the crane cab.
• Allow 0.3 litres (0.08 gal) of oil to flow into
the sample container.
• Switch the engine off.
• Remove the hose; à Disconnecting the hose, P. 7 - 94.
• Seal the sample container and dispatch it; à Dispatch the oil sample to the
laboratory
, P. 7 - 95.
• Determine the condition of the oil; à Determining the quality of the oil,
P. 7 - 95.