Join Date: Oct 2006
Location: Callao, VA
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Re: Yanmar Transmission Clutch Problem
some manuals and parts breakdown are available on the net...I found the kbw 20
the real chore is getting the parts, even the wear items are tough. Since you have it out, you will need to source clutch plates and bearings, but it would be good to know what caused the clutch to start to slip....lack of use and the wrong lube are the biggest causes ....
BTW, it is not a VW and unless your tool box is quite full, you will need some special tools to repair without damage. The clutch pack is more like a motorcycle one, multiple plates and wear discs stacked in a spring loaded can. You need to be able to measure .0079 wear, as well as gear tooth contact of 70%. thrust washers have to be facing the correct way. Heating the cases to remove bearing races is an art in itself. These are the biggies that I recall in rebuilds I did a few years back.
The there is the adjustments.
exchange is fairly pricey, and unless you know the builder and what he replaced, you may end up worse off
best of luck