Farm Equipment - 3 Cylinder B

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3 Cylinder B

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=31322
Printed Date: 10 Mar 2025 at 2:08am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 3 Cylinder B

Posted By: KenBWisc
Subject: 3 Cylinder B
Date Posted: 25 May 2011 at 6:52pm

My B wasn't firing on all cylinders all of a sudden. Tracked it down to #3, changed the plug and checked for spark but no change. Good compression but the plug was black vs. grey. Pulled the valve cover and one of the push rods was higher and to to the right side of the rocker arm. I also noticed that the rear rocker arm amd the front one aren't distributing oil down the groove to the contact face. Also, the rear rocker arm of each pair isn't lining up with each valve.
Do I need a new rocker arm assembly? Can mine be rebuilt? There is some side slop at the shaft in each arm. The engine was overhauled two years ago but I don't think anything was rebuilt here. Please advise!

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'34 WC #629, '49 G, '49 B, '49 WD, '62 D-19, '38 All Crop 60 and still hunting!

Replies:

Posted By: norm[ind]
Date Posted: 25 May 2011 at 7:09pm

DO YOU HAVE A BENT PUSH ROD??? CALL1-574-342-4545

Posted By: MBWisc
Date Posted: 26 May 2011 at 7:34am

No, push rod is straight.