Farm Equipment - 200 Jumps out of 3rd gear

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200 Jumps out of 3rd gear

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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=12217
Printed Date: 31 Jan 2025 at 12:07am
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Topic: 200 Jumps out of 3rd gear

Posted By: midwesttk
Subject: 200 Jumps out of 3rd gear
Date Posted: 09 May 2010 at 8:29pm

Can someone please tell me what causes the 180,185,190 and 200 to jump out of 3rd gear when going down a hill or backing off on the throttle ? Will a new shift fork usually correct the problem ? Does the tractor need to be split to repair this condition ?

Any suggestions?

Thanks much for any info.

midwesttk

Replies:

Posted By: CTuckerNWIL
Date Posted: 09 May 2010 at 8:34pm

I'm not a 100 series owner, but I think the main reason was somebody couldn't take the time to stop before shifting and has removed too much metal off of the tooth rounders by grinding gears. Inspect things and find the cause and be prepared to split the beast to fix it.

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Posted By: DSeries4
Date Posted: 09 May 2010 at 9:23pm

The transmission on my 190XT is currently in pieces for this reason - jumping ouf of 3rd and 4th. Found several little things that contributed to the problem. Main problem: Shift fork for 3rd/4th was really worn bad. Bought a new one from AGCO - but NOT cheap!! Also found that the bearings on the input shaft were not very good, and allowed the input shaft to move back and forth. The splines on this shaft were not the greatest either. Managed to find a good aftermarket unit. The shift linkage itself could also have lots of wear that does not really help matters.

Since it is apart, I am also replacing every bearing and seal in the transmission and rear end. Should be good in the end!

It is important to note that this problem is derived through abuse by the operator. Use the clutch and don't grind the gears and you'll be fine.

Posted By: Clay
Date Posted: 09 May 2010 at 10:05pm

DSeries4, could you list the parts, prices and sources.
Thanks.
I need to do the same thing to my 180. I know the coupling is very worn.
Also am planning to rebuild the brakes and the power director. May even give the old girl a paint job.

Posted By: Rayhowling
Date Posted: 09 May 2010 at 10:58pm

We split our 180 last year and replaced 3rd, 4th gear, and reverse was worn and so we put in some shims and it works great now, now reverse is okay. To replace reverse you have to take the rear end all apart to replace reverse I believe. We then split behind the engine and replaced the clutch and release bearing.

Posted By: skipwelte
Date Posted: 10 May 2010 at 11:49am

Its usually a combination of problems with 3rd/4th gear jumpout. Rough shifting, gears loose on the main shaft-need a thicker snap ring on the front. Loose countershaft beaings allows the countershaft to move -will knock it out of 4th. Worn shift forks. Some problems are fair wear and tear, some are due to grinding when shifting and some are because the shafts werent set up properly either during an overhaul or from the factory. HTH