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Show Parts for Model:

4020 lost all hydraulics

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Chuck Hebert

01-14-2013 20:22:56

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1965 4020 with powershift. The hydraulics has been weak for some time. As the tractor warmed up the 3pt and hydraulic cylinders would chatter and move slow. All hydraulics have gone out now, brakes, steering,3pt,trans, will get a little response if running for a bit, but will go out shortly after you use it. Is it the main pump.

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Tx Jim

01-15-2013 04:08:52

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 Re: 4020 lost all hydraulics in reply to rockyridgefarm, 01-14-2013 20:22:56  
I'd suggest changing hyd filters,cleaning sump screen and then checking trans pump and main hyd pump pressures. It's possible damper clutch stripped out.

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01-14-2013 22:29:49

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 Re: 4020 lost all hydraulics in reply to Chuck Hebert, 01-14-2013 20:22:56  
It sounds like your transmission lift pump is dead. It is not sending any oil to the main pump.

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