1981 6080 won't run.
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=196256
Printed Date: 12 Nov 2025 at 1:12pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 1981 6080 won't run.
Posted By: Goatman63
Subject: 1981 6080 won't run.
Date Posted: 20 Jul 2023 at 4:49pm
New to me 6080, was granddads old tractor, I changed the fuel filter, and bled the lines up to the injectors. Got fuel. But when you start it, it dies in 30 seconds like outa fuel. There is on the side of the injector pump a bolt on side of it, that when uou take it out fuel runs out of corse and.fire up, it will stay running, but soon as you put bolt in it dies in 30 or so secs. #1. What is that bolt for and its purpose.
Thanks
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Replies:
Posted By: 200Tom1
Date Posted: 20 Jul 2023 at 4:57pm
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Return line on your injector pump is plugged up. Probably from the fiber disk inside the injector pump going to pieces.
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Posted By: injpumpEd
Date Posted: 20 Jul 2023 at 5:34pm
probably the reason it was "parked" so long ago. Didn't feel it was worth fixing. Those pumps don't sit well in old degraded fuel either.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: Goatman63
Date Posted: 20 Jul 2023 at 6:29pm
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InjectEd how salty is a rebuild on a pump? It was running good when we picked jef it up and roaded it home about 4 mile, all we done was change fuel filter.
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Posted By: steve(ill)
Date Posted: 20 Jul 2023 at 9:13pm
if it started when you changed the fuel filter, then i would start there... Sucking air ? bad gasket ? plug in fuel line ? .... you moved the primer... maybe air leak around it ?
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Like them all, but love the "B"s.
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Posted By: MACK
Date Posted: 20 Jul 2023 at 9:39pm
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If it runs with bolt out, the return in pump is plugging up. Remove return fitting out of pump, with a small punch, drive check ball out from top to bottom. If it runs good then, time for a pump rebuild. MACK
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Posted By: Mikez
Date Posted: 20 Jul 2023 at 9:44pm
Posted By: injpumpEd
Date Posted: 21 Jul 2023 at 8:00am
runs about 1000 in my shop.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: SteveM C/IL
Date Posted: 21 Jul 2023 at 10:50am
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All the symptoms of weight retainer flex ring going bad. A good rebuild should last another 40 yrs.
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Posted By: DSeries4
Date Posted: 21 Jul 2023 at 8:42pm
Time to get the injection pump rebuilt
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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