815 Combine Hydrostat

CP1 · Jun 13, 2016

Went to try to diagnose an 815 that won't move today. Happened once before but started to move again and work, but today it will not move again. Fluid is up in the reservoir. Took the lines loose where they come out of the pump and go to the Hydrostat motor. Fluid comes out and no air. Seems to be under some pressure but has fluid coming whether the lever is ahead or back the same. Just cracked them loose there is all. No turning of the shafts out of the gearbox to the final drives. Any problems with the inch valves or is there a place to check pressures? This combine is made into a forklift, kinda handy but no moving ahead or back right now. Thanks for your help or advise

Bob · Jun 14, 2016

Not that this solves your problem, but the high pressure lines between the pump and motor will always have "charge pressure" of a couple of hundred psi? even when hydro is in neutral.

Any chnace the issue could be simple and mechanical in nature, a stripped coupling at the pump or motor shaft, or even a stripped driveshaft to one of the final drives, for example?

AMuth · Jun 18, 2016

It moved did you get it fixed?

815 Combine Hydrostat

CP1

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Bob

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AMuth

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