Posted by Bob on March 29, 2019 at 21:13:57 from (64.255.159.199):
In Reply to: 4020 clutch job posted by DeltaRed on March 29, 2019 at 20:36:40:
Tap the traction clutch TO bearing off of it's sleeve with a brass hammer, then remove the cross shaft and fork, and unbolt the PTO operating piston assembly from inside the clutch housing, and replace the square-cut seals that seal it to the clutch housing, and replace the 2 O-ring seals and backup rings in the two operating piston bores. If the little pistons (actually repurposed dowel pins) show ANY wear or scoring, replace them as well. This is IMPORTANT to prevent any oil leaks into the clutch housing.
The PTO APPLY TO bearing and the collar it fits into are two separate pieces, and if the side of the collar that contacts the PTO clutch APPLY fingers shows ANY wear or damage, replace it as well as the bearing.
(Note that the PTO "TO" bearing actually is forced against the 3 PTO clutch fingers to APPLY the PTO clutch, not to release it.)
DEERE had some issues with the pistons "fluttering" in the bores and wearing and leaking.
It is VERY important that the PTO clutch fingers be set up correctly and EVENLY after the clutch is installed on the flywheel.
DEERE (at least for a time) retrofitted new fingers with counterweights to help with this, but these may be "nla", I'm not sure.
Also, a check valve and different springs, and possibly some other changes were made at the PTO clutch operating valve, it would be a good thing to know if this tractor got the updates.
Also, there's a procedure to set up/adjust the PTO clutch operating valve.
I suggest you consult a factory manual and/or ask down on the DEERE-specific Board, as you don't want to have to do this job twice. (I have a manual, but not where I'm at tonight.)
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