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840 engine removal

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=48504
Printed Date: 24 Jun 2025 at 8:52am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 840 engine removal

Posted By: demo
Subject: 840 engine removal
Date Posted: 05 Apr 2012 at 7:03am

when removing 840 loader engine , is there something that needs to be unbolted at the flywheel. Does it slide out of a pump drive? how does it drive trans.?

Replies:

Posted By: Brad in WA
Date Posted: 05 Apr 2012 at 2:26pm

There is nothing to unbolt inside. Support the transmission and just pull the engine out. There is a drive ring on the flywheel that drives torque converter.

Posted By: demo
Date Posted: 05 Apr 2012 at 5:48pm

Brad in Wa. thank you 4 the info on the 840. I have more questions. the converter seal leaks very bad. will it pull out like a car converter? where might a person find that fiber gear that bolts to the flywhee & also a transmission pump? the valve body shafts also leak. is that a lip seal or do you have to pull the shafts & they have o-rings?

Posted By: Brad in WA
Date Posted: 05 Apr 2012 at 6:20pm

Demo, I'm not sure how the converter comes out, never done that. The fiber drive gear is available from any Minnpar dealer (company in Minneapolis that handles parts for these things). The tansmission control valve shafts use a lip type seal, part #1008507. Hope this helps.