4020D Clutch

Mixed feed with our 4020 yesterday and 3/4 of the way through the mixer started to bog down I looked at the tractor and it never changed RPM's, shut
the loading auger off and let the mixer catch up. Im assuming this means that my PTO clutch is slipping. I plan on splitting it and doing the work
myself. I have the IT manual and also the JD Service manual. Is it as simple as taking the clutch apart and putting in two new disks, adjusting the
settings and putting it back in? What else should I do while I have it split, I think I read most guys do a rear main any other areas to look at?
 
Checked the mixer and its all good, I put a different tractor on it and it didn't bog at all and the tractor was even less HP at 76. The 4020 is an early model and is a Synchro
 
Then it's the clutch. The later syncros had a hydraulic engagement system that could leak oil into the clutch housing, causing the same slipping. I'm guessing the tractor has that wonderful burned clutch smell, now too.
 
Pretty well. Make sure when you take it apart that transmission input shaft seal and engine rear main seal aren't leaking engine oil on clutch. When you take it apart I would take flywheel somewhere to check it for thickness and have it resurfaced if needed. When putting together pto clutch fingers and engine clutch fingers will need adjusted with special JD tool.
 
I would replace the throwout bearings as well. You can buy the clutch tool on Ebay. If the adjuster bolts have grooves in the head you can grind them flat or replace them. Make sure none of the clutch plates are warped as well. I like doing clutch jobs as they are rather profitable, you can save a nice amount of money by doing it yourself. Tom
 
I did not try to adjust it, what are the steps to doing that? Last year when baling hay I also noticed that sometimes when I shut the baler off it would stay running unless I played with the lever and pushed it and pulled it back some.
 
As Cushman said try adjusting the PTO clutch first. If the PTO lever has very little tension going over center during engagement, likely an adjustment will help. Loosen the panel in front of your feet. Look inside while moving the PTO lever, you will see the linkage. There is a turnbuckle that will need to be adjusted to lengthen the linkage. Lengthen until you have a fair amount of resistance pushing the PTO lever over center. After you have adjusted the linkage gently grease both throwout bearings. One grease zerk is behind the clutch pedal the other needs to have the clutch housing plate under the tractor removed to grease.
 
Not shutting off likely is oil residue on the PTO disc causing it to be slightly tacky, that also might explain the PTO clutch slipping. The PTO brake might be shot causing the PTO to not stop after it is shut off.
 
How can the brake be fixed. Looking at the service manual it looks like it is just a little round part at the bottom of the housing. Is there adjustment on it? I checked the PTO lever last nite and it is really easy to push over center. I will try tightening it first to see if that makes a difference before I split it. Im also gonna look inside to see if it is oily or not.
 
There is no adjustment for the brake. The tractor has to be split at the second split to replace the PTO brake. Keep in mind the PTO brake is only applied by pulling the PTO lever back, just releasing the PTO lever does not apply the brake.
 

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