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JD 350 Reverser Leak

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Pushin Dirt

03-18-2003 12:14:15




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I have a plain JD 350 track loader leaking transmission oil. The lift hydraulics are not affected. When the crawler stopped moving, I noticed a lot of oil on the ground. It was in a bad place, so I filled the transmission up and it moved about 30 feet to a level spot before it stopped again. I jacked it up and took off the belly pan, everything was oily. So I cleaned it up as best as I could and put in some more oil. I ran it until oil started coming out of what would be the bell housing on a conventional tractor. Looks like maybe the input shaft seal? How big a job is it to replace that seal? Can it be done without removing the transmission? How big a job is it to remove the transmission? Is there anything else I should check? Any help would be appreciated.

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John de Marrais

03-22-2003 16:42:46




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 Re: JD 350 Reverser Leak in reply to Pushin Dirt, 03-18-2003 12:14:15  
You haven't made it clear if you have a conventional clutch-driven 350 or with a hydraulic reverser. Subsequently, I don't know which part of your machine is leaking and which part you keep filling. The gear-transmission filler/dipstick is down between your feet while the hydraulic reverser dipstick/filler is more towards the front and on the side. Either way, the easiest fix is to first remove the engine, which is pretty easy. Then, if you have a hydraulic reverser, you'll be looking at the input shaft that has an oil seal. That seal can be easily changed if that's the only problem. If the shaft feels excessively loose, then you've probably got a worn center bearing (inside the reverser) and the entire unit must be removed for proper fix. The John Deere reverserer is made of Twin Disc components, and has an input shaft and output shaft, all in line. One bearing on each end, and a small bearing in the middle between both shafts. It's the little center bearing that usually wears out. They are all Timken cup-and-race adjustable bearings and the bearing adjustment is done with shims at the rear of the reverser where it bolts to the transmission. One note, 1010s and early 350s were prone to such bearing failure and when being repaired are usually updated to accept a larger bearing. If you don't have a reverser, then you will have a dummy housing in it's place with a long shaft going through it. That assembly will need to be removed to get to the transmssion,unless you want to attack the job from the rear. That would entail a lot more work (taking tracks off, unbolting your side-frames, etc.).

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Gary B

03-19-2003 00:33:12




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 Re: JD 350 Reverser Leak in reply to Pushin Dirt, 03-18-2003 12:14:15  
PD
That is where mine was leaking from. I pulled it out with the motor. What i found was a bad bearing. If you have a book it tells how to do it I done it this way cause there was more i wanted to do. The transmission is behined it joined buy a coupler(check this for ware) The only thing in the bellhousing is a shock type thing for the reverser. I'm not shure now but the motor may slide ahead in the side frames far enough to get the reverser out.
Good luck

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Lavoy

03-18-2003 20:18:46




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 Re: JD 350 Reverser Leak in reply to Pushin Dirt, 03-18-2003 12:14:15  
If it is a reverser crawler, I would guess that it is a pump seal. The reverser pump is in the bellhousing.
Lavoy



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