PTO clacking

[old and tired]

So I looked (as I assume you did) online to find a diagram of L4508 - nothing showed up. Are there other models that were of that same year but different hp? - such as a 40 hp or 50 hp model of the same tractor? The -08 model was not sold in USA...

I could show you what the CAMS ratcheting and locking look like... see attached.

Thing is your dealer most likely knows about this but (guessing here) they will never admit that they have heard anything about these ever skipping.

For location in my tractor; 2nd attachment.

 

[Maxx]

Thanks this should help. Now I can visit the dealer and learn what they might have to say. I'm told by others that Thai farmers don't usually take their stuff in for repair/service until a total failure occurs and for that reason they suggest never buying a used machine of any kind. So the thinking is that if it still works, it's still good. I'll be surprised if this goes well or easily but will report my progress.

So I don't know if this helps, but here is a photo of the PTO end of the tractor. As you can see, I have no external PTO clutch but I'll be looking for one soon.

 

[Maxx]

So the overriding clutch protects the transmission in the event the implement RPM caused by inertia over runs the RPM of the transmission upon slowdown...so the new style (non-overrunning) clutch cam does not do the same...i.e. no transmission protection? As such, if I had these new cams installed, I would need an external clutch similar to the one in an earlier thread?

Also, I can understand how they work to protect overrun, but under a workload the cams do lock together. The cause of the clacking while under a workload would be caused by what? Worn cams, worn or broken springs, or ??

 

[old and tired]

...The cause of the clacking while under a workload would be caused by what? Worn cams, worn or broken springs, or ??

Skipping, NOT locking together. So much force and it pushes past... So yea, possibly worn or not strong enough springs.

NOW, I don't know (exactly) is what type of CAMS you actually have... I've never seen (or heard) of your model tractor and you said that it's 2009/2010 - those same cams in my tractor (in USA) were around 2004-6 (early). They were phased out in early 2006 since they were failing. I'm surprised they were still running those in '09/'10.

Hopefully the dealer can shed some light on it...

 

[kubotafreak]

Can you put another implement on with load to see for sure if its the tractor, and not the implement/pto driveline?

 

[Maxx]

Can you put another implement on with load to see for sure if its the tractor, and not the implement/pto driveline?

I am sure it is the PTO (or something in the PTO driveline) because when I put my hand on the PTO lever to select hi/low/neutral, it jumps to coincide with each clacking sound. I used the tiller today and found that in clay soil, in low gear, (transmission) with the PTO RPM set at 540, if I come off idle to maybe 900-1000 engine RPM the clacking starts and continues until I read soft tilled soil. If I run it slowly at or just above idle the noise is less often or not at all. It is definitely the PTO confirmed by the location of the noise emitted i.e from under my seat as opposed to from behind where the tiller is. Thanks for the help.