Manitowoc Grove GMK 5200-1 Maintenance Manual page 54

Maintenance overview
5.4 Measures required for winch monitoring
5.4.2
5 - 22
The actual service life of a winch is affected by a number of additional exter-
nal factors, such as:
1. Overloading caused by improper use of the truck crane.
2. Insufficient maintenance:
3. Operating errors:
4. Improper maintenance:
5. Improper assembly during maintenance and repair work.
6. Leaks which were ignored.
7. Improper adjustment of safety devices.
8. Latent damage caused by accidents.
9. Extreme environmental
conditions:
Proportion of theoretical service life used
The truck crane operator must perform a truck crane inspection at least once
a year (ISO 9927-1 and BGV D 6 (VBG 9) / BGV D 8 (VBG 8)).
This includes determining the proportion of theoretical service life that has
been used. If required, the truck crane operator has to appoint an approved
inspector for this assessment.
The actual operating conditions (load spectrum) and the hoist operating
hours must be determined for each inspection interval when determining
the proportion of theoretical service life that has been used. The operator is
responsible for proper documentation in the crane logbook.
Oil is not changed at the specified
intervals.
Extreme acceleration or deceleration
of the load,
Load falling into the ropes.
Wrong oil used,
Incorrect filling quantity,
Contamination during oil change.
Low or high temperatures,
Aggressive ambient conditions,
Dust and dirt.
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GMK5200-1