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Post Info TOPIC: Broken Gears on PTO


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Broken Gears on PTO
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As some of you may of heard, I was recently given an Allis Chalmers WD from my father in law. The thing runs pretty well and does what we will need (mow the pastures, scoop poop and move round bales). I noticed some oil dripping out from the PTO seal when I first got it, and then after running the belly mower (PTO driven) it really leaks. I'm guessing the seal had just dried out and then when I went to engage the PTO, that was the end. Upon dropping the PTO housing, I noticed some broken teeth on the main gear. I'm guessing this came from someone trying to engage the PTO before everything had stopped spinning. I'm wondering if this is going to be detrimental and need to be replaced, or if I can file down the sharp edges on the gear, replace seals, and reassemble. 

"I love horses" 

 

 

 



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1965 Elky, 350-200R4

1970 Mercury Colony Park 

1952 Allis Chalmers WD

"It's not about how fast you go, it's about how fast you get going"

~ Steven ~ Stacy, MN



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In the exploded view, it's the idler gear that is chewed up. 



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1965 Elky, 350-200R4

1970 Mercury Colony Park 

1952 Allis Chalmers WD

"It's not about how fast you go, it's about how fast you get going"

~ Steven ~ Stacy, MN



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Is it available new, or do you need to get it from a tractor salvage yard?
I think it would probably run for a long time as is, but as long as you have it out, it would be a good time to replace.

Those old tractors seem to just continue to run forever worn out, broken, and/or poorly maintained.

FYI, If you're using a mower on a tractor w/o live-PTO, you should definitely be using an overrun coupler.



-- Edited by Derek69SS on Monday 29th of June 2020 11:52:52 AM

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Derek Kiefer - Mantorville, MN

69 Malibu Pro-Touring stroker LS1-383/T56 - 69 SS396-325/3spd project



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Derek69SS wrote:

Is it available new, or do you need to get it from a tractor salvage yard?
I think it would probably run for a long time as is, but as long as you have it out, it would be a good time to replace.

 - They're out there for about $150-$200. I need to do some reading to know exactly, but it looks like the shaft that it rides on is a press fit into the housing. I agree that it may run and not have any problems, but I also don't want it to cause more issues if teeth continue to break off and now there's metal pieces floating around.

Those old tractors seem to just continue to run forever worn out, broken, and/or poorly maintained.

 - That's exactly what my father-in-law said. The tractor hadn't been run in about 8 years and as we get out to the barn, he said well "it ran when parked" and I had to chuckle. Heard that before, but sure enough, poured some gas in and she popped right off. The gear oil that I drained out though definitely left something to be desired.

FYI, If you're using a mower on a tractor w/o live-PTO, you should definitely be using an overrun coupler.

 - Educate me on what a live PTO is? This tractor has two clutches. A hand and a foot clutch. If you disengage the hand clutch, the PTO continues to spin, but it disengages the transmission. If you disengage the foot clutch, both the PTO and transmission stop. 

-- Edited by Derek69SS on Monday 29th of June 2020 11:52:52 AM


 



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1965 Elky, 350-200R4

1970 Mercury Colony Park 

1952 Allis Chalmers WD

"It's not about how fast you go, it's about how fast you get going"

~ Steven ~ Stacy, MN



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All my old tractor experience is with Fords, so I'm not very familiar with your clutch setup, but I have heard of them. On my older Fords ('47 and '53) I only have a foot clutch which works the same as yours. With the tractor in gear, when you step on the clutch, the flywheel effect of the mower will continue to push the tractor in gear until the mower stops. Overrun coupler is a ratcheting coupler that goes on the PTO shaft that allows you to stop the tractor when the implement is spinning.

You will be able to stop using the hand-clutch, but I'd probably still put an overrun on it in case you forget and use the wrong clutch to try stopping. :)

My newer Ford ('96 3930) has live-PTO which isn't tied to the clutch. You can turn on and off the PTO without the clutch, and it stays running when you do disengage the clutch.

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Derek Kiefer - Mantorville, MN

69 Malibu Pro-Touring stroker LS1-383/T56 - 69 SS396-325/3spd project



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Like Derek said, if you can get a new gear, reasonably priced and in a short time, replace it. If not, no worries. You can see the wear pattern is much wide than the chipped teeth. I wouldn't worry about it. New seals and fresh lube will be all it wants.

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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

Some Assembly Required

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS 350 rs



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There is a tractor salvage place off 65 I think and a AC Forum on the web when I had mine. Good little tractors that are fun to play with but it starts with $100 here and $100 there get my drift? Lots of used parts out there. Wish I never sold mine but needed the cash at the time. Wife was unhappy I bought it and furious I sold it.


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