4020 clutch job

I'm doing a clutch on a neighbor's 4020. Cant quite figure out how to get the throwout bearings changed.I don't have a book. Sure is different than the IH tractors I familiar with. LOLThe PTO throwout bearing looks like it is hydralicly actuated.It's a late side control,syncrorange tractor.thanks,Steve

I don?t have the real book for the late model tractor

Thanks. I think I'll go to town tomorrow and buy a IT manual. Hope TSC has one

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.)

Bob has outlined the repair very well. The only thing I will add is just about all of the late JD 4020s I have put new clutches in had leaks in the PTO pistons/pins. Installing new orings just works for a short period. Usually the housing that the pins slide in is worn as well as the pins. Replace them both if they show much wear at all. These tractors are fifty years old. Everything is getting worn on them.

I learned the hard way about adjusting pto fingers. the screwdriver wedge is a joke. I leave the three small pto springs out during adjustment. Works every time. You have to take the clutch assembly apart again to put the springs in. Much better than a second split. I do the pto fingers first, then the traction clutch fingers last. Be sure to mark and "time" every component to the flywheel.