PTO adapter

[cst010]

Have a ford 55 ford 860. Purchased a PTO adapter to convert to 1-3/8. Found that a 5/16th roll pin is too small but a 3/8 is too large? What do most people use to pin the adapter to the PTO shaft? Would a 5/16th bolt/nut/washer work for this? Seems just a little sketchy to go that route.

 

[paul]

Not to derail your thread, but I thought all the 100 series Fords were ‘young enough’ to all be the bigger pto size, yours needs an adaptor?

Anyhow, some adaptors have a thumb pin, much like a regular old pto connection has. First in the pic.

Some have a hole and use a spring clip pin like in the second to last. (Or a bolt when you lose the clip…)

Real good ones have set screws that clamp the extension to the tractor pto for no slop, wear, or protrusions to catch clothing.

The last pic has a clamp with a fitted bolt, no wear as it clamps tight, and fairly small protrusions to catch.

Not in the pic but a lot of them now have a smooth locking collar that pulls back to release, just like the modern pto connections have. These are pretty good too, I have a few like that for converting 1000 pto stuff. No protrusions to catch.

It’s good to be concerned about it as you are, but that’s kinda the place you are at. A bolt or that clip pin can catch clothes, need to be careful.

Paul

 

[Lynn Patrick]

Do you have to remove the 2 grease zerks to pin it? If so, DO NOT use a bolt as that will make the over running clutch just a pto extension! I HOPE I misunderstood your query. If so please accept my apology!!

 

[shaun wallace]

1 3/8 pto shaft came with X01 series in 1957 for 58 model year.

 

[cst010]

Thank you for the comment but I believe you misunderstood.

I have a 1-1/8 to 1-3/8 adapter, not an overrunning clutch. A roll pin at 5/16ths is loose. I can push the roll pin through the hole in the adapter and pto shaft with my fingers. A roll pin at 3/8ths is way too large. Cannot find a roll pin at 11/32nds (not sure this is made). So, what I am going to try is use a 2-inch roll pin at 5/16ths, drill small hole on each end and then pull a cotter pin through each hole and (using small wire) twist tie the cotter pins together. The 5/16th pin is snug through the adapter and pto shaft but again, I can push that pin through just using my fingers. Hoping this will work as I don't understand the forces, if any, on those cotter pins once a cutter is connected and shaft is spinning at 540 rpm. This is tighter than a bolt with nut
The adapter does extend the length of the pto shaft about 5 inches and there is noticeable runout.

 

[Jeff Hamilton]

I have an 860, also using an adaptor. I have a 5/16ths bolt in that hole with a nylock nut.

 

[Eman85]

I don't think the pin will be the weak link. From what I've seen posted on these forums the adapter can have a high failure rate as most aren't well made. If it lengthens the shaft be sure to check and if needed shorten the drive shaft of your implements.

 

[TractorDad3]

I wasn’t going to admit this but on the subject, I used an adaptor on the stub shaft with a low grade bolt to support a PTO hydraulic pump for my splitter. Got too aggressive and dead headed it. Sheared the bolt and maybe saved my 172d crankshaft.
Super rook move, some of us have to pay more to learn
For me that includes a new shaft because the sheared bolt is not accessible for me to get out and get the extension off
Do not do that

 

[Texasmark]

Have a ford 55 ford 860. Purchased a PTO adapter to convert to 1-3/8. Found that a 5/16th roll pin is too small but a 3/8 is too large? What do most people use to pin the adapter to the PTO shaft? Would a 5/16th bolt/nut/washer work for this? Seems just a little sketchy to go that route.

That's what I used when I first bought this farm and had no money.

 

[cst010]

Was able to solve the issue. Purchased a PTO shaft that is 1-3/8. The seal on the shaft is bad so going to replace the seal and bearing on the 1-3/8 shaft.

 

[m16ty]

The roll pin just keeps the adaptor from falling off, the splines hold all the torque. If the roll pin holds in there and doesn’t fall out, it won’t really matter if it fits a little loose in one of the holes. The reason a roll pin is used instead of a bolt is for safety, a bolt sticking out is much easier to grab loose clothing. A bolt would work as far as just holding it on.

 

[Eman85]

Was able to solve the issue. Purchased a PTO shaft that is 1-3/8. The seal on the shaft is bad so going to replace the seal and bearing on the 1-3/8 shaft.

You made the best decision.

 

[cst010]

Pulled the original pto shaft from the tractor. There is a difference in appearance between the two. The shaft on the bottom is the original, on the top is the shaft with 1-3/8 splines. Measured (at the widest point shown) and there is a small difference; the original shaft is .0002 smaller. I did insert the larger shaft in the tractor, and it slid right in, and everything lined up. Not sure what tractor series the 1-3/8 shaft came from.

Looking to see if anyone has a comment on if the larger shaft working as a replacement.

My next question. On the replacement shaft, stood this on end and filled the bearing with hydraulic oil and let stand for about two days. Didn't see any oil weep out. Is this a validate test for the integrity of the pto shaft seal?