Im replacing the clutch in my 830. The pilot shaft bearing was destroyed, but the shaft seems to be ok. The crankshaft has a "Plug" in the end of it. Its very loose and easily moves around, also, its recessed in the crank. I think it should be tight in the crank and even with the end of the crank, but Im not 100 percent sure of this. I think the hole in the end of the crank is worn causing this problem. From what I can tell, my options are: 1. throw the plug away and hope for the best? 2. have a new plug made to fit the worn hole in the the crank and somehow bond it to the crank. 3. replace the crank. Hopefully someone has a better idea than I do. Any suggestions? Your help would be greatly appreciated.
- Thread starter Philof96
- Start date
tomstractorsandtoys
Well-known Member
I assume you are refering to a three cylinder 830? On the 3020-4020 tractors there is a fiber chip sometimes refered to as a wooden nickle in the end of the crankshaft. It does not fit tight and the purpose is to keep the end of the clutch shaft from getting a burr or swell on the end if the clutch shaft ever moves forward against the crankshaft. I once split a 4020 that did not have this and the clutch shaft would not come thru the pilot bearing. We got it but only with alot of work. I usually replace them when doing a clutch job. Tom
Yes, its a 1975 three cylinder. The end of the pilot shaft had swelled. I took the clutch apart to seperate the tractor. Then cleaned the end of the shaft with a file to get the bearing race off. The plug in the tractor is steel. I could try to buy a new one, but I think the crank is worn and it would not fit. Maybe I could make a nylon plug and epoxy it in place? That would keep the end of the pilot shaft in place. My concern is the inner bearing race. The plug seems to keep the bearing in the proper location. I would hate to replace the crank for someting like this.
Most of them "Don't" have them,,they get lost along the way, and they do fit loose. I usually chamfer the clutch shaft a bit going back together.. and I have had them with a bur on them too,, I have had to remove the clutch cover bolts before and let it all come back with the rear of the tractor, then file the end of the clutch shaft to get it to let go of the pilot bearing..
tomstractorsandtoys
Well-known Member
Deere must of had a reason or they would have left it out. Tom
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
thrust plug is available from JD if you decide to replace it.
T20445 PLUG,THRUST ADD 32.30 USD
I agree they must have a reason. Without it, you would not be controlling the endplay and this may damage the splines on the input shaft. My understanding is they are using fiber inserts now, instead of the steel thrust plug. With this in mind, I think I am going to fab a nylon insert and epoxy it in place. This should be better for the shaft and prevent "mushrooming" the end. I would purchase the replacement plug, but with the crankshaft wear it would not fit. What is your opinion on this method? Thanks for your reply.
Never considered not using a pilot shaft bushing. I was concerned about supporting the inner race.
(I agree they must have a reason for the thrust plug. Without it, you would not be controlling the input shaft endplay and this may damage the splines on the input shaft. My understanding is they are using fiber inserts now, instead of the steel thrust plug. With this in mind, I think I am going to fab a nylon insert and epoxy it in place. This should be better for the shaft and prevent "mushrooming" the end. I would purchase the replacement plug, but with the crankshaft wear it would not fit. What is your opinion on this method? Thanks for your reply.)
(I agree they must have a reason for the thrust plug. Without it, you would not be controlling the input shaft endplay and this may damage the splines on the input shaft. My understanding is they are using fiber inserts now, instead of the steel thrust plug. With this in mind, I think I am going to fab a nylon insert and epoxy it in place. This should be better for the shaft and prevent "mushrooming" the end. I would purchase the replacement plug, but with the crankshaft wear it would not fit. What is your opinion on this method? Thanks for your reply.)
Never considered not using a pilot shaft bushing. I was concerned about supporting the inner race. (I agree they must have a reason for the thrust plug. Without it, you would not be controlling the input shaft endplay and this may damage the splines on the input shaft. My understanding is they are using fiber inserts now, instead of the steel thrust plug. With this in mind, I think I am going to fab a nylon insert and epoxy it in place. This should be better for the shaft and prevent "mushrooming" the end. I would purchase the replacement plug, but with the crankshaft wear it would not fit. What is your opinion on this method?) Thanks.
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