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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...

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...

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...

Also, I have looked but cannot find a schematic of the PTO showing these cams. Can anyone point me in the right direction? It might help me when talking to the Kubota service rep. Since I don't speak or understand Thai (well I can ask for a large beer, the check, and where the bathroom is), I...

I don't have one but that is a good idea. I'll see if I can find one here. thanks.

Thanks, I'll check the top pin. My PTO use is less than 30 working hours so I'd think the top pin should last longer than that but since no one mentioned it before it is certainly worth a look. Also I'll look at other attachment points as well. Thanks

Yup, I use that at the home improvement store almost every time I go shopping. It's pretty close but you see there isn't a Thai work for every English word so things do get lost in translation. So a cotter pin in the US is a split pin here. A lock washer in the US is a split ring or split...

I'm not sure what that means really. If by 'clutch' you mean the one in the main drivetrain..I can only say the movement of the tractor remains constant and steady but I do feel a sudden hit to the PTO engagement lever ...a jerking movement...ever time I hear the clacking sound while the PTO is...

Thanks. I'm moving ahead with the idea of overriding cams in the PTO to see where that leads.

None. What do you suggest?

Also, thanks for the replies and the information. I now have a plan. Where can I find a diagram of a Kubota PTO so at least I can show what part of the tractor I am concerned about. I think I know where this is heading. Someone from the dealer will have to drive out and witness the sound...

When I engage the PTO with nothing attached or with the tiller raised, I don't hear anything that suggests broken teeth. In fact, the sounds are normal until the torque is challenged by hard soil. Not knowing much about the PTO I wondered if there was some safety mechanism that disengaged the...

I also have an earth auger with a 16" drill and that puts decent pressure on the PTO but at much lower RPMs and I don't hear any such noise when in use. Also if I engage the drive with the tiller raised so there is no pressure on the PTO, there is no noise as one might expect if there were...

I have an L4508 and run a PTO tiller and trencher. When I hit hard soil with either implement the PTO starts clacking loudly and the speed selection lever on the PTO jerks with every loud clack. I need to slow the engine speed to just above idle and run the PTO at 540 RPM to minimize this...