WÄRTSILÄ RT-flex50-D, Maintenance Manual

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Maintenance
0012−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
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3. Attaching and disconnecting
The following must be observed:
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Distribution of load:
− one strand carries the total of load weight
− two strands carry each one half of the load weight
− four strands carry each one quarter of the load weight if the load is distrib-
uted equally.
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Angle of strand:
− the flatter the strand angle, the more the strand is stressed
− the more acute the strand angle is, the less the strand is stressed.
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Place a soft-wood board between rope and engine component, because the
ropes tend to slide on smooth surfaces (e.g. tubes, shafts).
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Protect the ropes against damages by providing a wooden pallet or a rag.
Sharp edges may even cut steel cables!
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If possible always tie down the load. (danger of fall)
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Wrapping the rope twice increases friction and adhesion in such a manner
that even a smooth, oily shaft is sliding less.
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Hemp rope strands, wrapped around the hook, prevent sliding. Do not wrap
steel cables, but cross them instead.
Danger of injuries! For your own safety never stand beneath loads!
Hold the ropes in the flat of your hands and keep your fingers stretched out. Never
seize the load at the bottom, but always lead it laterally. Always put down the loads
on a perfect ground, and use sufficiently sized bases.
General Guidelines: Wire Rope Slings, Span-sets, Eye Bolts, etc.
2010