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656 PTO pressure adjustment?

T

TimWafer

Member
Went out to brush hog a little the other night and it seemed as though the PTO was slipping on my 656. Since it was late anyway, I quit and headed for the barn. Looked at the PTO the next day and thought that the lynch pin for the top link of the 3point was mangled a little and maybe it was interfering with the linkage for the PTO. I’ve never checked or adjusted the PTO pressure before, so thought it was a good time to do so. Rigged up a gauge and only got about 130PSI. Apparently it’s supposed to be about 230PSI. Found just by raising the stem a hair more with a screwdriver it went to 180PSI.
Got out the manual and read how to adjust it but noticed on mine there is a nut (like a locknut) underneath the T shaped nut that the linkage hooks to. I don’t see that locknut pictured or mentioned in the manual. It pretty much takes up all the available threads on the stem. Is it supposed to be there or just something someone added in the past? If it’s supposed to be there, I guess I’m out of adjustment.
Tim
 
If you can get 185 that is all a 656 needs. As far as the nut. The early models didn't have the lock nut. You were supposed to put Loctite on the threads. I always put an allen screw to lock threads. When they went to a lock nut and higher pressure pto they changed the spool valve, large nut with seal in and went to a thin spacer. I changed a lot of them on the larger tractors but never worried about the 656 that did not have it . One reason is the new nut with seal does not support the spool as well as old style did as seal was way down inside. If you were having slippage the disc's are most likely toast already.
 
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