8070 trouble
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=150664
Printed Date: 17 Oct 2025 at 4:59am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 8070 trouble
Posted By: Lynn Marshall
Subject: 8070 trouble
Date Posted: 21 May 2018 at 1:02pm
Customer now has a see through block. I will be putting in an engine from an R6 gleaner.   
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Replies:
Posted By: Ron(AB)
Date Posted: 21 May 2018 at 1:16pm
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Wow! How many hours on it? |
Posted By: DrAllis
Date Posted: 21 May 2018 at 3:42pm
| I had an old D-17 gas that did that one time. Connecting rod broke right in the beam. When I tore it down, I looked at the other three rods and I could see where they ( at one time) were clamped in a vise, leaving some serious bite marks in the rod beams. That is why the one rod broke. I was always taught to never ever clamp a conn rod in a vise. Always wrap a thick rag around the rod and just snug up the vise. |
Posted By: FREEDGUY
Date Posted: 21 May 2018 at 9:03pm
| Dumb question possibly, but how long could an engine run with a hole like that,seconds,minutes? Would an operator hear the "BANG" from inside the cab? I only ask because I have not been around/on a tractor-combine that suffered this. Sorry for the owner of this particular machine though. |
Posted By: MACK
Date Posted: 21 May 2018 at 9:15pm
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Could depend on which rod. Front rods, die when it happened because it almost always breaks the cam. Back rods could run on front cylinders until it run out of oil or something else gave up. No they don't make a lot of noise. MACK |
Posted By: acer
Date Posted: 22 May 2018 at 4:07pm
| I have welded a patch on some with muggy rod but that's too big to fix!! |
Posted By: Kevin in WA
Date Posted: 22 May 2018 at 6:01pm
| I saw one that the pin bushings worked loose in the rod and the pounding broke the piston in half and then the rod flailed around and did what the one in the picture did... |