Maintenance overview
5.4 Measures required for winch monitoring
5 - 26 3 302 574 en Maintenance manual
GMK3060
03.11.2017
5.4.3 Example
A GMK3060 is equipped with a separate operating hours counter for the
hoist and is classified by Manitowoc Crane Group Germany GmbH as
follows:
The used proportion S of theoretical service life is calculated based on the
individual inspection intervals as follo
ws:
1. In
spection (1st yea
r)
The truck crane was used for a
sse
mbly work during
the previou
s year:
Load spectrum L 1, i.e. Km
1
= 0.125.
The operating hours counter for the main hoist reads 160 h, i.e. T1 = 160 h.
The used proportion S
1
of the theoretical service life after the 1st inspection
is thus:
Remaining theoretical service life:
D1 = 3,200 h - 160 h = 3,040 h.
The aforementioned values are entered in the table (see table example
p.
5 - 28).
2nd inspection (2nd year)
The truck crane was used for unloading work o
n docks: Load spectrum:
L 3, i.e. Km
2
= 0.5.
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 th
e first year)
T2 = 480 hrs.
Power unit group:
M 3
Load spectrum: light L 1, Km = 0.125
Theoretical service life: D = 3,200 h
S
i
0,125
0,125
---------------
160 h 160 h==
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