In Reply to: JD 643 slip clutch 6 row posted by KGM on August 20, 2004 at 12:00:15:

You need to get the oil orgrease off of the slipclutches first.Loosten the four bolts that compress the spring.Then drive a screwdriver inbetween them to separate them.Either works pretty good for cleaning.Iff the slipcluthes are shiney you can put a little battery acid inbetween them and leave the screwdriver in to let the metal corrode a little bit.Then tighten the bolts back down.This is a quick fix but you don't have to pull the oil bath or the shaft and slipcluches on that side of the header.If you have any questions feel free to e-mail me.Good luck. farmertim