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4020 PTO brake
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Jon Hagen
Posted 11/18/2015 20:07 (#4905182 - in reply to #4904946)
Subject: RE: 4020 PTO brake



Hagen Brothers farms,Goodrich ND
pirlbeck - 11/19/2015 17:58

jcwag - 11/18/2015 18:42

Have never done a PTO brake on these before. Early 4020 syncro. Had jd get me the parts, but from what they gave me it looks like I only need to split at clutch housing and pull the deck and top cover. I was thinking I needed to split it twice. It manual is of no help .... Anyone with experience?? TIA....


You only need to split it between clutch housing and rear end housing. PTO brake cone will be right there after you roll it apart, trans cover will need removed to gain access to the upper 3 split bolts.

Are you sure the brake is shot.........early (non console) S/Range tractors don't usually wear the PTO brake out unless moisture in the oil has caused the bonding adhesive to fail. Are you sure the lever detent under the dash don't need lubed to allow the PTO lever to go back enough to apply the brake? Or that the PTO clutch is dragging?





My 64 model 4020 syncro had problems stopping the PTO for the 20+ years I owned it. Stopping the PTO required the engine at dead slow idle and needed the PTO lever jerked back to the stop with 50 + pounds pressure. Cleaning and replacing clutch disc did nothing to improve this. We finally discovered the problem when one of the PTO clutch fingers broke . When we removed the old finger, we found the pin holes in the finger and the pins badly grooved on one side. The worn / grooved pins changed the finger adjustment by how the pins rotated. If on the worn side finger was loose, if on the good side finger was tight, no way to keep the fingers correctly adjusted. We installed all new fingers and pins, then adjusted the fingers. Now simply pulling the pto lever back gently, even at top rpm, the pto stops effortlessly. Inspect and replace any clutch fingers and pins that show even slight wear. Also the very early 4020 fingers have a small adjusting bolt that is prone to break. The new fingers have larger adjustment bolts that don't break.
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