Manitowoc Grove GMK 5250L Maintenance Manual page 57

5.4
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5.4.1
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Maintenance manual
GMK5250L
Measures required for winch monitoring
Also observe the information on the general inspection of the hoists;
à
p. 8 - 13.
These measures for monitoring the winches (hoists) were compiled by the
German Machine Builders' Association (VDMA) and are to be used for all
truck cranes according to the German Accident Prevention Regulations for
Winches, Hoists and Tractor Machines, BGV D 6 (VBG 9 ) and BGV D 8 (VBG 8) .
Theoretical service life
The theoretical service life is determined according to certain operating con-
ditions and a theoretical total operating time assumed by the design engi-
neer when calculating and dimensioning the winches of your truck crane.
The power unit group M3 and the load spectrum L1 (Km = 0.125) are gener-
ally given for truck cranes in erection mode, resulting in a theoretical service
life of 3,200 h (ISO 4301/1, FEM 1.001, DIN calculation basis for power units).
The theoretical service life is not the same as the real (actual) service life of
a winch.
5.4 Measures required for winch monitoring
3 302 744 en
Maintenance overview
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