hello Hi guys - Zetor 5211

[MariusP]

Thanks for having me here
I’m Marius and am currently working on a zet or 5211


I’ve been fighting a clutch rebuilt that has left me stupefied
I’ve replaced everything from master to slave cylinder with complete new clutch on this 5211
For some reason I have no clutch with gears grinding.
I’ve set the clutch fingers as per the manual se attac pic. Also the little brake as per spec.
If anyone have any idea what I should check before splitting the tractor again, I’d really appreciate some advise

 

[Joachim]

Hello and welcome Marius!

First question: Are you sure you installed the drive clutch disc the right way round? A common mistake. It must be installed with the longer side of the drive pin facing the engine.
If it points backward toward the transmission instead, the clutch disc will bulge and no longer disengage properly. The clutch disc is then usually scrap, and a new one will have to be installed.



Hier is a little better image for clutch settings I made a time ago:

On the right, you can also see a small tool that you can quickly build yourself to simplify adjusting the clutch release levers.
It's also important that the three release levers have a maximum deviation of 0.1 mm from each other so that the automatic transmission can disengage smoothly and parallel.

 

[MariusP]

Thank you very much for the advice and especially the drawings.
Though I was pretty sure I did fit the drive clutch the right way around - I’m now not so sure
I’m gonna split it and will let you know.
Thanks for your support Joachim

lol I actually pray that’s the problem

 

[Joachim]

Did you also replace the pilot bearing? It should always be replaced when working on the clutch.

 

[MariusP]

Yes I’ve replaced it as well

As an update
I’ve split the tractor again and confirmed that the primary clutch was facing the engine with the long side.
I will take some pictures and post then later today.

 

[Joachim]

Okay, then the following points come to mind:
- Does the drive clutch drive pin slip easily on the transmission input shaft? Was clutch grease used there?
- Is there any wear on the transmission input shaft that is preventing the drive clutch disc from slipping easily?

If everything mentioned so far is really OK and the settings are correct, then the tractor should be able to disengage and engage the clutch normally, I think.