Farmall Cub

I'm having trouble getting the PTO to engage correctly.

Most of the time it just almost engages and make a lot of grinding noise.

If I loosen the bolt that holds the shifter rod plate, I can get a little more throw on the shifter rod and it will engage.
This usually last a couple of minutes, then it starts grinding again.

I took the PTO shaft and shifter clutch out and noticed that the end of the shifter clutch is ground out a little.
This has been done by the grinding when it dis-engages.

I also noticed that I have at least 1/4" of in/out play in the transmission spline shaft.
Is it suppose to have that much play??

I suspect that when I try to engage the PTO, the shaft is all the way in and it doesn't have enough gear for the shifter clutch to take hold of.

Also, it doesn't help that the splines are ground down a little on the end of the shifter clutch.

Any thoughts or help would be appreciated!!

Thanks,

Ron

Ron, I think if you read this you will find your problem:

http://www.antique-tractor.com/CubFAQ/cub_faq_2.html#q4

Thanks Bigdog!!

This sure looks like what I need to figure this out.

Ron

Thanks Bigdog for the information you pointed me to.

I took my shifter shaft out and inspected the shifter pin
Sure enough, the pin had wear (flat spots on both sides).

I was able to weld new steel on top of the flat spots and grind them down to where it just fits into the shifter collar.

Put it all back together and now have been cutting grass all morning.

No problems so far, the PTO stays engaged!!

Just one more time I have been saved by this great group here!!

Thanks,

Ron

You might still want to take a look at that play in the transmission spline shaft. 1/4" seems like a lot.

I believe you are correct, 1/4 " is a lot.

I plan on splitting the tractor to take a look at things.
I suspect that the front seal/retainer is install backwards.

Kind of hard to do when it is running so good!!

Oh well, all it just takes time and effort.

I'll let you know what I find.

Ron