Parts for a 844 ci engine ???
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=27889
Printed Date: 20 Jul 2025 at 12:31pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Parts for a 844 ci engine ???
Posted By: DougG
Subject: Parts for a 844 ci engine ???
Date Posted: 24 Mar 2011 at 5:35pm
|
What parts are still avaliable for these engines ? I seen you can get overhaul kits ; what about cranks etc ? Got a new project brewing ;
|
Replies:
Posted By: gemdozer
Date Posted: 24 Mar 2011 at 6:16pm
|
I have some used 844 parts but no more crankshaft.
|
Posted By: big al
Date Posted: 24 Mar 2011 at 10:21pm
|
i am rebuiding one as we speek,you might be able to get a new crank from fiat,the last time i heard about $4500.00
|
Posted By: Bob D. (La)
Date Posted: 25 Mar 2011 at 5:43am
Reported
-------------
When you find yourself in a hole,PUT DOWN THE SHOVEL!!!
|
Posted By: scott
Date Posted: 25 Mar 2011 at 6:26am
|
Would an 844 bolt in where a 426 had sat?
|
Posted By: DougG
Date Posted: 25 Mar 2011 at 11:26am
|
I have found out the old BIG AL engines had a counterweighted crank ;thats the one that broke ; then AC put out a new version in about 1975 ; anyone know the differences ? I believe I could have one made for $4500 ; also anyone know if the BIG AL version is different than the engine for scrapers and crawlers ?
|
Posted By: big al
Date Posted: 25 Mar 2011 at 11:55pm
|
the cranks broke off at the front snout do to prolonged tortional vibrations.allis tried to correct this by drilling the crank to accept a long dampner bolt to keep the nose of the crank in compression.then they induction hardened the nose,then they went to a 6 counter weight crank(instead of 12) to lighten the rotating mass,finally they went to a snub nose as used in the 6138.all the above improvements have differant part #s.note: cummins also had this problem (335)and went to the snub nose.
|
|