|S&S Swan Maintenance - Worn Lewmar winches|
12 June 2019 - 08:38
Join Date: 05 August 2010
Worn Lewmar winches
after many years of service, the crowns of our (retro-fitted) primary winches were somewhat worn, in part due to a former owner forcing oversized sheets into the self-tailing crowns. The effect was visible wear on the "teeth" of the crown, with the result that sheets with less diameter tended to slip, in particular while new.
Old Lewmar Primary
Same winch, new crown fitted
12 June 2019 - 16:43
Join Date: 02 January 2008
Here some self-tailing information.
Your winches have Wavegrip type self-tailing with fixed jaws. The jaws can accommodate a range of line diameters, and it is advisable to stay within this range.
It sounds like the former winch owner used oversize line. Then the line does not go in between the jaws deep enough, and this creates an increased feed diameter for the line.
The jaws then try to feed the line faster than the drum, and this soon tensions the line to excessive loads over the stripper arm, increasing friction enormously. The crew experiences this as cranking becoming extremely heavy. This may also bend the stripper arm.
Newer Lewmar winches have spring loaded jaws which can accomodate a much larger range of line diameters, but at the time of the fixed jaws the spring loaded jaws were protected by a patent held by another winch manufacturer.
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