Posted by Allan In NE on January 27, 2010 at 08:33:57 from (148.66.88.254):
In Reply to: Re: IH 656 hydro posted by Tbone8 on January 27, 2010 at 07:40:46:
I'd first yank the pan and see if there is any excess metal (brass), I mean a LOT of brass indicating piston wear. Those old 656s had some issues in that area.
If not, however, I'd sure be looking at those check valves in the center section. They are the primary wear point and literally get beat to death during normal use.
Also, the forward and reverse capsules up in the control head above the battery will sometimes give trouble.
Even more involved, if the valve plates are warped and letting oil by, they can be resurfaced for a fraction of the cost of a replacement unit.
Like I say, if this tractor is still moving and working, really doubt if there is anything seriously wrong with it. Further, if the tractor is strong in one direction and "slippy" in the other, that is a dead giveaway that the basic tranny is okay.
It's those old guys that can't hardly move in either direction that scare ya.
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