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JD 4020 hydraulic front drive
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Turbo 8820
Posted 5/16/2019 09:21 (#7499801 - in reply to #7499342)
Subject: RE: JD 4020 hydraulic front drive


S.E. Washington
I was not there in the 70's when those were new, but have been around a lot of those as they were popular here.
Is yours the JD axle or an aftermarket?
Do you have a book? The most common mistakes are in wiring the solenoids.
Did they go into the hub and motor assemblies?
One trick, BE CAREFUL if you do this, bypass the neutral safety switch with the clutch pedal held down and you can put the front up on blocks and watch it work as you shift through the gears and change directions. The danger is that obviously the tractor could take off, so do this out in an open area with an operator in the seat at all times!!
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