Serves me right I guess
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=208256
Printed Date: 07 Dec 2025 at 8:45am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Serves me right I guess
Posted By: Tbone95
Subject: Serves me right I guess
Date Posted: 21 Sep 2025 at 9:51am
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Have owned and operated Deere, Allis, Perkins, IH and Cummins diesel engines on the farm for close to 55 years of memory. Was fueling the 7045 Friday afternoon getting ready to start cutting silage. Ever since last fall when we got it all fixed up tip top mechanical shape she has ran awesome. I was listening to it and thought this is one of the sweetest sounding engines of all I’ve ever had. The first half a load of silage, smiling from ear to ear, suddenly I felt like a shudder go through the tractor. I slowed down and holy crap what a serious miss! Smoking (black) something awful. 😞 |
Replies:
Posted By: DrAllis
Date Posted: 21 Sep 2025 at 10:51am
| Injector tip blew off ?? A pushrod has jumped out of place because the adjuster bolt backed off ?? are the two most likely. Pay attention to the blow-by hose or remove the oil fill cap with the engine running. Bad puffy blow-by is a failed piston. |
Posted By: Tbone95
Date Posted: 21 Sep 2025 at 12:00pm
Thank you. I’ll check it out, but I won’t be fixing it here. Beyond my facilities. Though I would love to and learn. |
DrAllis wrote:Posted By: DrAllis
Date Posted: 21 Sep 2025 at 12:47pm
| Also, a blown head gasket between two cylinders. |
Posted By: Tbone95
Date Posted: 22 Sep 2025 at 4:50am
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Posted By: DrAllis
Date Posted: 22 Sep 2025 at 6:27am
| Blown head gasket is (for me) an easy diagnosis. No change in blow-by fumes. No real change in exhaust smoke. When cranking with the fuel shut off the cranking speed is up and down because you've lost the compression on two cylinders. Regardless, park it. I've had a couple blown head gaskets in the past that the operators must have ran for a couple hundred hrs like that and then the top deck of the block gets burned away. |
Posted By: Tbone95
Date Posted: 22 Sep 2025 at 7:38am
Oh it is definitely parked! I won’t run it like it is. If no change in exhaust = blown head gasket, then it is NOT a blown head gasket. Dad was following me in case I hit a wet spot and it smoked so bad he thought it was on fire. It looks and sounds terrible. I did slowly drive it home, and will drive it on a hauler I guess. Going to be a few months. |
Posted By: Lynn Marshall
Date Posted: 22 Sep 2025 at 7:54am
| The excessive black smoke sounds like a turbo failure, but that shouldn't normally cause a misfire. |
Posted By: tbran
Date Posted: 22 Sep 2025 at 9:07am
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Spun #5 rod brg is a possibility - ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: Tbone95
Date Posted: 22 Sep 2025 at 9:37am
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Posted By: Lynn Marshall
Date Posted: 22 Sep 2025 at 11:52am
| I suppose that it could also have some weird injection pump problem causing a misfire and over fueling. Like the Doc says, an experienced ear can tell you alot without even starting the engine. |
Posted By: NEVER green
Date Posted: 23 Sep 2025 at 8:11am
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I had a chunk break off the turbo compressor vane on our 7060 and I could not believe how bad it run. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |