Manitowoc Grove GMK 4100L-1 Maintenance Manual page 74

Maintenance overview
5.4 Measures required for winch monitoring
5.4.3
5 - 26
Example
A GMK 4100L-1 is equipped with a separate operating hours counter for
the hoist and is classified by Manitowoc Crane Group Germany GmbH
as follows:
Power unit group:
Load spectrum:
Theoretical service life:
The used proportion S of theoretical service life is calculated based on the
individual inspection intervals as follows:
1. Inspection (1st year)
The truck crane was used for assembly work during the previous year:
Load spectrum L 1, i.e. Km
The operating hours counter for the main hoist reads 160 h, i.e. T1 = 160 h.
The used proportion S
therefore is:
0,125

-------------- -
S 160 h
=
i
0,125
Remaining theoretical service life:
D1 = 3,200 h -160 h = 3,040 h.
The above values are entered in the table (see table example p. 5 - 28).
2. inspection (2nd year)
The truck crane was used for unloading work on docks: Load spectrum:
L3, i.e. Km = 0.5.
2
The operating hours counter for the main hoist reads 640 h, i.e. during this
period: 640 hrs. - 160 hrs. = 480 hrs. (160 hrs. were used during the first year)
T2 = 480 hrs.
M 3
light L1, Km = 0.125
D = 3,200 h
= 0.125.
1
of theoretical service life after the first inspection
1
160 h
=
3 302 364 en Maintenance manual
GMK 4100L-1