PTO Thingamajig. Any body know what it is?

[Industrial Toys]

I am curious what this device is, on the PTO shaft of a PTO Wood Chipper. IF is is an over running clutch, it's not working as the PTO shaft into the tractor, still turns, when the PTO is shut off.

I do notice that is rotates freely about ninety degrees and wonder if it is just to facilitate lining up the splines of the PTO without turning over the machine.

Thanks

 

[em14]

I am curious what this device is, on the PTO shaft of a PTO Wood Chipper. IF is is an over running clutch, it's not working as the PTO shaft into the tractor, still turns, when the PTO is shut off.

I do notice that is rotates freely about ninety degrees and wonder if it is just to facilitate lining up the splines of the PTO without turning over the machine.

Thanks

View attachment 509741

I'm not sure but it looks like a slip clutch!
Leo

 

[CobyRupert]

I'm not sure but it looks like a slip clutch!
Leo

Sort of does, doesn't it. Why else have "cooling fins", if that's what they are?
Start turning wrenches and see what falls apart!

 

[Industrial Toys]

I called Bandit Industries, and of course have heard nothing back. I could see no name on the unit.

This thing will kill my (approx) 70 PTO HP tractor on startup without two thirds throttle, so if it is a slip clutch it must be set at some rather high limit. It probably wouldn't do my tractor much good, so since my tractor falls within the recommended HP limits although at the low end, I have my doubts about the slip clutch.

 

[Oldoak]

If it is a slip clutch and hadn't been run for a long time, most likely the clutch disks are corroded and have seized together. The clutch assembly should be taken apart and cleaned.

Or is it an "overrunning clutch" which allows the chipper to coast to a stop when the tractor PTO is disengaged, and eliminates undo strain on the tractors drivetrain.

Any wood chipper that I have used had a very heavy flywheel and was equipped with an overrunning clutch.

 

[sixdogs]

I think it's some sort of an overrunning or "friction" clutch and have had them on the front of my balers and a pto chipper over the years. I used to know them because they were common but have long since relegated that part of my memory to other things. I'm not sure but I think I recall those fingers may have moved out of the cover as inertia picked up. I recall they protected the implement from the inertia the flywheel developed.

 

[Oldoak]

sixdogs, I believe you are correct. That was my line of thinking also, but you explained it clearer than I did. :drink:

 

[sixdogs]

sixdogs, I believe you are correct. That was my line of thinking also, but you explained it clearer than I did. :drink:

Oldoak, yes, you are correct. I agree with you and meant to link to your post but forgot.

 

[N80]

I wouldn't think an overrunning clutch would cause his tractor to bog down. Not sure why a slip clutch would either unless he is constantly under a load the tractor can't handle anyway. All a slip clutch does is slip when too high a load is encountered. Even seized it should not add a load to the tractor.

Curious to find out what it actually is.

 

[sixdogs]

I wouldn't think an overrunning clutch would cause his tractor to bog down. Not sure why a slip clutch would either unless he is constantly under a load the tractor can't handle anyway. All a slip clutch does is slip when too high a load is encountered. Even seized it should not add a load to the tractor.

Curious to find out what it actually is.

I don't think it sips in the sense that you're thinking. I think that when the flywheel --let's say a baler--begins to "drive" the PTO on the tractor, this thing slips. In addition, when you turn the tractor PTO off, the things slips so the baler flywheel doesn't drive the tractor. I think that's what made the clicking sound when I shut off my baler and the flywheel kept turning but the tractor PTO did not. It just free-wheeled. I'm not positive but pretty sure I have this right