SUNWARD SWDM40 - Wire Rope Maintenance

SWDM40 OPERATION & MAINTENANCE MANUAL
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FIG. 8-3-8 deformation
 Various deformation of wire rope.
 Determine to discard the wire rope according to the criteria, such as reduction in rope
elasticity etc.
 When the outer layer of wire rope has been abraded for 40% of rope diameter, the
diameter has reduced 7% or more.
 Outer wire rope is corroded with deep kinks.
FIG. 8-3-9 rope diameter reduction
 Rope diameter reduction.
 Broken wires are caused by internal corrosion, gap reduction among strands and
increased rope diameter.
8.3.8 Wire Rope Maintenance
 Clean up mud on the wire rope after work to avoid corrosion.
 Lubricate the wire rope frequently during use, especially the bended part.
 Shorten the lubrication interval of wire rope when used in the corrosive environment.
 The type of lubricating grease should be recommended by the wire rope manufacturer.
 Choose lubricating grease which is as the same as the one recommended by the wire
rope manufacturer.
 Lubrication methods include: apply with a brush or a grease gun.
 Only lubricated by a grease gun can penetrate the grease into the gap of the wire rope
at the greatest extend.
 Wash the wire rope regularly, especially used in a corrosive or chemical environment.
 If broken wire is found during inspection, it should be cut to prevent damage wire
nearby when reeving a sheave.
 The best method to remove broken wire is to bend wire rope forward and rearward till
the wire break in the gap of two strands.