pto shaft clutch removal

[John Shutler]

on my pto chipper there appears to be some sort of clutch fitted between the end of the pto shaft and the shaft into the machine. if you wanted to change the shaft (its not long enough) how would you go about separating the pto shaft and the clutch?

thanks

john

[Stephen Blair]

it should just be a button mate like the other end, the clucth is so the tractor end stops and the flywheel can slow down under its own steam. or it will be a knocked in split pin, so you may need to punch it out. Get the covers off and get a good look at it.

[Tom D]

Sometimes there's a bolt, same idea though, should just slide off once the bolt/pin is out.

[AardvarkTreeServices]

Theres a shear pin coupling on the topper we have which has shear bolt on one side of the coupling. If the bolt shears the drive from the tractir carries on spinning but theres no drive to the topper.

 

The coupling is held on the shaft by a roll pin. If yours is the same you'd need to knock out the roll pin and then knock the drive shaft out of the coupling.

[skyhuck]

Some PTO shafts have a slip clutch, its just clutch plates held together with springs. The one I had the clutch was close to one of the yokes so the shaft could be shortened in the usual manner.

 

Edit, sorry you wish to lengthen, not shorten, you can probably get a new longer tube section and fit the yokes and clutch to that, if you take the shaft to an agricultural supplier they should be able to match up the parts you need.

Edited February 23, 2015 by skyhuck

[Agi-Smash]

Any pictures of said shaft?

Could be an overrun clutch. Does it have several springs bolted around it.

Could be any of the above, or maybe a roll pin through the yoke.

What shape shaft you running?

[John Shutler]

it should just be a button mate like the other end, the clucth is so the tractor end stops and the flywheel can slow down under its own steam. or it will be a knocked in split pin, so you may need to punch it out. Get the covers off and get a good look at it.

 

Sometimes there's a bolt, same idea though, should just slide off once the bolt/pin is out.

 

cheers guys, il take all the guarding off tomorrow and try to get a better look

 

Any pictures of said shaft?

Could be an overrun clutch. Does it have several springs bolted around it.

Could be any of the above, or maybe a roll pin through the yoke.

What shape shaft you running?

 

the shaft is a star shape, apparently not that common when I called the local ag place

[Agi-Smash]

Star shape? With a round hole up the middle of the inner shaft? Thats usually used on high power consumption machinery. Roughly how many hp you using as maybe changing shaft would be more conveniant and cheaper

[Agi-Smash]

Probably a walterschield

[John Shutler]

Star shape? With a round hole up the middle of the inner shaft? Thats usually used on high power consumption machinery. Roughly how many hp you using as maybe changing shaft would be more conveniant and cheaper

 

yeah that's the one, its a valmet running 110hp or there abouts powering a chipper