Re: 656 hydro forward problems

Posted by Gary on May 18, 2003 at 06:17:37 from (66.226.101.81):

In Reply to: 656 hydro forward problems posted by Rob on May 14, 2003 at 07:17:47:

Could be a few different things. The hydro does have a forward and reverse relief valve but they usually either stick open or the orfice plugs in the end. If stuck open will effect both directions. If plugged tractor won't stop when pedal is pushed down. Might be the forward check valve has happened but rare. Also does the tractor pick up a bunch of ground speed above the blue line on the quadrant. If not trouble in the motor servo it's retracted tractor won't have pulling power in forward because the motor swash plate has straightened up. My guess the problem is in the drive control valve A or B valves.Email me and I will tell you how to isolate them.Been working on hydros since they came out

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