Manitowoc GROVE GMK7450 Maintenance Manual page 249

Checking the oil
G
H
H
Maintenance manual
GMK7450
Risk of accidents from falling load!
If this inspection is not performed, there is a risk of damage to the hoist gear
which could lead to the load falling.
Check the waste oil for abrasion particles or have it tested in a laboratory:
•
Pour the waste oil through a clean filter mat.
•
Examine the oil or the residues on the filter mat using a magnifying glass.
If you find abrasion particles or solid materials on the mat, the hoist gear
must be dismantled and inspected by the manufacturer.
Some abrasion particles may appear in the first oil filled. If you notice abra-
sion particles during the first oil change (after 200 oper. hrs.), first consult
Manitowoc Crane Care
Draining oil
•
Place a receptacle under the pipe (3).
•
Unscrew bolts (1) and (6) and allow the oil to
drain.
•
Replace the gaskets and secure the hose (5)
with the screw (6) – torque 30 Nm (22.1 lbf ft).
Topping up the oil
•
Fill the oil through the pipe (3) up to the
Max. mark (4).
•
Replace the gaskets and secure the hose (2)
with the screw (1) – torque 30 Nm (22.1 lbf ft).
before introducing any specific measures.
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Maintenance work on the superstructure
8.6 Hoists
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