AC 190 rear main seal.
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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=135779
Printed Date: 01 Oct 2025 at 8:24pm
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Topic: AC 190 rear main seal.
Posted By: acplowboy45
Subject: AC 190 rear main seal.
Date Posted: 04 Mar 2017 at 1:42pm
| I have a 190 and I have replaced the rear main seal twice and now this is going on my 3rd time...Anyone might a have a good diagram on how this seal goes in. I'm too the point I darn near split my tractor in my sleep. What am I doing wrong. |
Replies:
Posted By: tbran
Date Posted: 04 Mar 2017 at 1:46pm
|
how many bolts in the flywheel? does it have a dowel pin ? Do you have the lip oriented correctly, did you replace the wear sleeve and is it correctly installed. Are you sure it is the seal that is leaking? also what is the fore aft movement of the crank as to end play... need more information...
------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: DougG
Date Posted: 04 Mar 2017 at 2:25pm
| I know the problem ! First time I done a rear main seal on an XT that was leaking , put it together still leaked; split it again and inbetween the Adapter plate and engine there are 2 Orings , one big and the other smaller; these were hard and dried up so bad theres no way they could've held oil ,, just my experience |
Posted By: ACjack
Date Posted: 04 Mar 2017 at 6:36pm
At the Harvey engine plant we used "square cut" O-rings on the rear plate/flywheel housings and to hold them in place during assembly a little spray of Scotch 77 was applied to the groves that were cut into the rear plates/flywheel housings.
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DougG wrote:Posted By: MACK
Date Posted: 04 Mar 2017 at 9:47pm
| Open part of seal goes to motor. Put a small amount of blue locate in seal ware ring before installing on crank. MACK |