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Frozen bearing unstuck on JD A

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Adam C.

12-31-2000 11:18:53




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Hi again, after buying my JD "A" a couple of months ago, I checked and changed every fluid except the gear box oil. I did this mostly because I didn't know where to add the oil ( I don't have a manual) and because I don't know where to check it... I know this was lazy on my part, but I've learned my lesson. Anyway, after running the tractor about 10 hours, one of the bearings in the gear box froze up while powering a generator in the middle of the night. I had to drag the "A" away because the rear wheels were froze and so was the whole gear box. So, being the busy guy I am, I didn't get along to fixing my "A" for about a month, and when I went to drag it into my shop , I realized that the rear wheels had come unstuck! So I hopped up on the tractor and started it up to see If It could move under it's own power... I put it in gear, but the gear box was still froze, with a little coaxing between reverse and first gear, the gearbox eventually came unstuck completely, and the tractor was able to run under it's own power... My questions are as follows.

1. Do I seek out the bearing(s) that froze for replacement? Or do I fill the gear box with oil and drive it as is?
2. Where is the gearbox oil drain plug, the filler plug and the plug were you check the gear oil located?
3. How much oil will the gearbox hold and what weight of oil should be used?
Thanks!

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Adam C.

12-31-2000 15:50:34




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 Re: Frozen bearing unstuck on JD A in reply to Adam C., 12-31-2000 11:18:53  
Ok, I think I might have this figured out. I remember now when I wen't out to check the tractor at about 1:00 am that was powering our generator, it wasn't running... I checked the gas tank and it had about 1/4 inch of gas in it, So I figured it was out of fuel. (which now I think it was) I poured in 5 gallons. After a couple of cranks, it started up, and everything was froze up. BUT..... there is a possibility that the tractor ran out of gas and for a couple of hours it sat out in the freezing weather and waterfroze in the bearings. I wen't out this after noon and started it up, drove it in all gears, and even tried the pto... everything worked.... I think I'll drain the oil. and drive it and see what happens....
Thanks guys

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Ron B.

12-31-2000 13:37:54




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 Re: Frozen bearing unstuck on JD A in reply to Adam C., 12-31-2000 11:18:53  
Adam, the power shaft sets near the bottom of the transmission case. If there was much water in the case, the only lube for the power shaft bushings would be water and could have locked up the power shaft killing the tractor. Then after setting awhile all the water would freeze around the large bull gears and lock up the rear axle. Just a thought.



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LDL

12-31-2000 13:22:06




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 Re: Frozen bearing unstuck on JD A in reply to Adam C., 12-31-2000 11:18:53  
I worked at an Allis dealership for awhile and the old mechanic told me of a WD that had this happen years ago. They dragged it in the shop and, because the owner didn't want to spend much, the mechanic just flushed the transmission and broke it lose. He says that tractor is still going today. But, I don't want to say this is what you should do.



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clooney

12-31-2000 11:48:11




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 Re: Frozen bearing unstuck on JD A in reply to Adam C., 12-31-2000 11:18:53  
Adam, it is highly unlikely that the rear axle/differential seized up while running a PTO. If the gearbox & rear axle seized at the same time & you had the tractor out in below freezing weather I would more inclined to believe the water that probably has entered the trans/differential oil over the years froze & stopped things from turning (very common problem on old J.D.s that were left outside. If that is the case warm the tractor to above freezing for about 1-2 days then drain the trans/differential into a bucket(S) (up to 10 or more gallons can come out if it has water in it, so have more than one bucket handy). You didn't say what year "A" you have so if you tell us we can point you to the drain & fill plugs. The transmission will hold between 6-3/4 & 8 gallons to fill.

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Adam C.

12-31-2000 12:36:12




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 Re: Re: Frozen bearing unstuck on JD A in reply to clooney, 12-31-2000 11:48:11  
My "A" is a 1951 w/38 hp engine. The tractor was operating in below freezing weather, but I don't see why is didn't freez up sooner because the tractor had been powering the generator for about 5 hours strait with no problems. And then It froze up killing the engine... I disengauged the pto and put the gearbox in neutral, everything was still froze up. But the rear axel was froze up for sure, I had to drag it away with a JD 7200 tractor (and yes the brakes were not engaged) I am sure I siezed up a bearing(s) , so the real question is, do I reaplace the seized up bearing(s), or run them as is for the time being? (that is, after I change the gear oil)

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Ken Hinman

01-01-2001 07:11:42




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 Re: Re: Re: Frozen bearing unstuck on JD A in reply to Adam C., 12-31-2000 12:36:12  
Sounds as if you have water in the trans and diff. When I found my 1944 A it was "frozen" had about 8" of water in the differential. It was below freezing so I removed the drain plug and waited for the outside tempeture to get above freezing. When it thawed out it was ok. My A dose not have a vent to the transmition and differential therfor, water will condense in that area with continued heating and cooling. I think your tractor has a vent but I am not sure. If it dose have a vent check it to make sure it is allowing air to flow in and out of the transmission and differential. The transmissin and differential should hold about 8 gallens of oil, probably 90 to 120 wieght. Check with your John Deere dealer they can tell you. I recommend you buy a manual, they are inexpensive and can be lots of help.

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clooney

12-31-2000 13:19:01




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 Re: Re: Re: Frozen bearing unstuck on JD A in reply to Adam C., 12-31-2000 12:36:12  
Adam, if you seized up a bearing it should definitely be replaced. I just can't think of a bearing in the trans that would seize up & cause the problem you had. With the tractor running in neutral with the PTO turning there was no bearings spinning in the final drive or rear axle area to seize up. After it stopped with the trans in neutral there wouldn't have been anything in the part of trans that was spinning to keep the rear wheels from turning when you pulled it in neutral. My money is on the rear axle or brakes being full of water & freezing. You could have seized a bearing on the trans input shaft or PTO (that is very unlikely but possible "the bearings usually wear out or get loose & the trans won't stay in gear but very seldom if ever seize up") but that wouldn't keep the rear wheels from turning with the trans in neutral.

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Adam C.

12-31-2000 13:43:57




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 Re: Re: Re: Re: Frozen bearing unstuck on JD A in reply to clooney, 12-31-2000 13:19:01  
clooney- Lets rule the rear axel out. Is ther any bearings in the gear box that run all the time when the clutch is engaged? Regarless of weather the tranny is in gear or the pto is engaged? If it is indeed a pto bearing siezed, is it alright if I still run the tractor as long as I don't operate the pto? where is the drain and fill plugs on the tractor? How many gallons of what weight oil do I use? would regular JD hydrolic/ transmission oil be sufficient? If I have a siezed bearing, i will surely find out if I operate the tractor for a period of time. right? Thanks again Clooney!

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