General instructions
1.3 Maintenance instructions
16.11.2018
Maintenance manual 3 302 756 en 1 - 3
GMK6400
Many defects and failures are caused by improper maintenance such as:
– Insufficient oil, grease or antifreeze
–Dirt
– Rope damage
– Faulty compressed air and hydraulic systems
– Hose damage or loose screw connections
– Faulty brakes
– Faulty tyres or wheel rims
– Exceeded maintenance intervals
For your safety and the safety of others, avoid these errors by carrying out
maintenance work carefully within the specified intervals. Do not put off
maintenance work that is due. If repairs are needed, immediately contact
Manitowoc Crane Care or an authorised GROVE dealer or your repair crew.
This work may only be carried out by trained, qualified personnel.
A few general maintenance instructions:
• Clean the parts of the truck crane that are to be serviced, particularly the
area around the oil filler openings, oil inspection openings, oil drain
openings and the lubricating nipples.
• When changing the oil, it should run out at operating temperature.
• Ensure that only oils and lubricants specified in the Lubricants, p. 6 - 1 are
used.
• Replace all filters within the specified period if cleaning is not explicitly
permitted.
• Always replace all gaskets before assembly.
Clean the sealing surfaces.
• Tighten loose screw connections on hydraulic and compressed air
systems only when the system is depressurised.
• Keep brake and clutch linings free of grease.
• Replace hydraulic hoses immediately once damage or moisture penetra-
tion becomes visible.
• Cleanliness is imperative when handling hydraulic oil. Even fresh
hydraulic oil must be filtered.
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