PTO Throttle Replacement...what am I doing wrong?

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Jason G
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Tractors Owned: '52 Cub
Location: Singing Creek Farm, Johnsville, Md

PTO Throttle Replacement...what am I doing wrong?

Postby Jason G » Thu Sep 26, 2013 6:25 pm

Ok, as many of you know, got a '52 last week. First order of business was fixing the PTO throttle. (Also known in the manual as "Rod, Power Take off Shifter", Part #351 970 R31). The old one was a long screw sort of Jerry rigged, and no longer working without the use of a banjee cord and lots of cussing.

So, bought the part from an ebay seller (with good feedback). Got here today.

The part came with the Lever and shaft, cotter pin, spring, and guide.

I removed the old screw, guide, etc. Saved same.

Replaced the old with the new..engaged PTO...and 'bag o hammers' screaming. Hmmm.....

Did some adjusting, etc, no joy. Put the old 'guide' back on and fiddled with that. Nuthin.

So, now I'm at a loss. The PTO when it engages, works great.

I just can't seem to get the guide situated 'just right' (either the new or the old) so the PTO doesn't scream/disengage.

So, what, exactly, am I doing wrong?

(I have looked at the parts manual, service manual, and searched the forums here but no real success, although lots of things to divert my attention LOL).
The proud papa of a '52!

Cecil
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Re: PTO Throttle Replacement...what am I doing wrong?

Postby Cecil » Thu Sep 26, 2013 6:31 pm

If the pin that engages the PTO on the inside of the transmission was not wore is sounds like one of 2 things. Your PTO shaft splines where they engage the input shaft are shot or some one has put the bearing retainer for the input shaft on backwards. You can check the first thing I mentioned by removing the PTO shaft and checking for worn splines. The other would require splitting the tractor.

Jason G
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Joined: Sat Aug 17, 2013 9:54 pm
Zip Code: 21791
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Tractors Owned: '52 Cub
Location: Singing Creek Farm, Johnsville, Md

Re: PTO Throttle Replacement...what am I doing wrong?

Postby Jason G » Fri Sep 27, 2013 8:58 am

Thanks Cecil. I guess I'll pull the PTO shaft on Saturday. For sure I'm not smart enough to split the tractor yet. LOL. :lol:
The proud papa of a '52!

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pickerandsinger
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Re: PTO Throttle Replacement...what am I doing wrong?

Postby pickerandsinger » Fri Sep 27, 2013 5:14 pm

Check out Corky's post on how to rebuild a PTO....Its listed in Engine,Clutch, Trans and Hydraulics for some reason not the PTO topic....On one of mine the shift collar was installed backwards causing it to have symptoms like your explaining...Also I've found that using some 6 inch bolts with the heads cut off and a notch ground into the cut off part that will allow a screw driver to turn them in, used in place of 4 of the rear mounting plate bolts makes it easy to slide the PTO in and engage the shift pawl into the shift collar especially working alone....Also a small light bulb and socket found in an auto parts store that will fit into the transmission fill hole will light up the area and allow you to see...Don't get to hot of a bulb or it will smoke things up :shock: ...You can hook it direct to your battery or whatever you want to figure out, depending on your light and voltage...PTO's are relatively easy, just a little intimidating if you haven't done one...Dave
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Re: PTO Throttle Replacement...what am I doing wrong?

Postby Rudi » Fri Sep 27, 2013 5:19 pm

Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


Jason G
Posts: 22
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Zip Code: 21791
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Tractors Owned: '52 Cub
Location: Singing Creek Farm, Johnsville, Md

Re: PTO Throttle Replacement...what am I doing wrong?

Postby Jason G » Sat Sep 28, 2013 12:21 pm

Thanks for the info! Alas, I am not confident enough, nor do I have the right tools, to accomplish this. Think I might have gotten into something that is beyond me at the moment. I really wanted the thing to work this weekend, but it is a no go.

The thing ran when I tried it out at the fellow I bought it from, (he used a bunjee cord to hold the makeshift throttle, a screw, in place...).

Sigh. Should have just invested in a new bunjee cord...would have been easier in the long run LOL.
The proud papa of a '52!

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Re: PTO Throttle Replacement...what am I doing wrong?

Postby Clark Thompson » Sat Sep 28, 2013 5:04 pm

Jason, The previous owner used a bungie cord to get by with a PTO shifter pin that is bad or the input shaft / driveshaft splines are shot. Probabley they are both shot. It could be a few other things wrong but the most common is the shifter pin and or driveshaft splines. You can inspect these by removing the PTO from the tractor. after removal of the PTO you can remove the PTO shifter,, the pin on the shifter should be round. if it is not then it needs to be replaced. Then with a good light look in the back of the trans at the splines on the input shaft. They are most likley rounded off . If so you will need to replace the shaft. This is done by splitting the tractor at the transmission.. to remove the shaft.. i have done it a 100 times. with minumum mechanical knowledge you can do this . just follow the service manuel instructions.
Collector of Farmall cubs and cub cadets.Injoy helping people keep their cubs running. Years of experipnce.

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Don McCombs
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Re: PTO Throttle Replacement...what am I doing wrong?

Postby Don McCombs » Sat Sep 28, 2013 6:41 pm

PM sent, Jason.
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Jason G
Posts: 22
Joined: Sat Aug 17, 2013 9:54 pm
Zip Code: 21791
eBay ID: zebra305
Tractors Owned: '52 Cub
Location: Singing Creek Farm, Johnsville, Md

Re: PTO Throttle Replacement...what am I doing wrong?

Postby Jason G » Sun Sep 29, 2013 9:47 am

Thanks all!
The proud papa of a '52!


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