8030 PD input shaft removal
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=177116
Printed Date: 12 May 2025 at 6:38pm
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Topic: 8030 PD input shaft removal
Posted By: brouillettefarms
Subject: 8030 PD input shaft removal
Date Posted: 29 Dec 2020 at 7:43am
| I have an 8030 with a broken high side input shaft, I have the tractor split and the PD clutches removed, my question is will the input shaft come out the front of the transmission or do you have to remove the transmission and dissemble it to get the shaft out? Thanks for any help! |
Replies:
Posted By: Lynn Marshall
Date Posted: 29 Dec 2020 at 1:25pm
Technically the transmission is supposed to be taken out so that the countershaft can be lowered in the front to allow the input shaft to be removed. I have cheated a couple of times on older machines by doing what's in the pictures but I'm not sure that I would do it on a nice low houred machine.  
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Posted By: Ron(AB)
Date Posted: 29 Dec 2020 at 6:04pm
|
Pull the trans. ------------- 405, 7000, 7050, 8050, 8070, L3, 2300 & 2600 disk |
Posted By: DougG
Date Posted: 29 Dec 2020 at 6:51pm
| Just gotta ask- whats the small broken gear in the picture, dont look like much material involved in that one |
Posted By: Lynn Marshall
Date Posted: 29 Dec 2020 at 8:56pm
| The "broken gear" in the picture isn't broken at all. I purposely cut that piece out with a grinding wheel so that it would slip past the countershaft gear when I reinstalled it. It was a good used shaft from salvage. That way ,you don't have to remove the transmission. What has been removed is a small piece of the shift engagement teeth. Now it is made similar to the 100 series and also a lot of the D series. That input shaft is also the high gear in the transmission. I feel that there is still plenty of contact for the shifting coupler to engage and not be a problem. I've done this on a couple of tractors and to my knowledge, they are still in use. The biggest problem with doing it this way is cutting the old broken gear out while still in the transmission with the least amount of sl*g going in places that you don't want it. |
Posted By: MACK
Date Posted: 29 Dec 2020 at 9:09pm
| Lynn, I have done the same thing. Don't hurt a thing. Some times the old gear can be broken with a big hammer and punch. MACK |
Posted By: NEVER green
Date Posted: 01 Jan 2021 at 10:24am
|
I think you boys misunderstood him, he said High input shaft, right??? If its just high, remove the bolts holding the high housing to the tranny, remove 2 1/2 inch nut and countershaft gear will come off with the high housing. No need to touch low input or take off tranny. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: Lynn Marshall
Date Posted: 01 Jan 2021 at 2:38pm
| Well crap, you are more than correct. I don't know what I was thinking about, especially since I just had an 8070 apart to change out the large ball bearing on the low shaft. Sorry for any misinformation. I will say, that I don't ever recall seeing a breakage of that high side hollow shaft. That would have to be a rare occurrence. The low side breaking has been known to give some trouble,but I've only seen it in the 7000 series. When it breaks, it can sometimes gall to the high side. That will in turn,cause the engine to stall once the clutch is released. Later production tractors had an oil seal in the high side hollow shaft for a better oil cushion between the two shaft assemblies. |
Posted By: DrAllis
Date Posted: 01 Jan 2021 at 3:12pm
| I saw that too from the original poster and assumed he twisted off the LOW range shaft and just called it the wrong thing. Never seen a high range shaft failure and when galled I always chucked them in a lathe and opened them up a bit so they would never do that again. |