Bleed cock on AC6080 Fuel Pump
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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=186129
Printed Date: 22 May 2025 at 3:18am
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Topic: Bleed cock on AC6080 Fuel Pump
Posted By: REM
Subject: Bleed cock on AC6080 Fuel Pump
Date Posted: 31 Jan 2022 at 5:28pm
|
Where is the bleed cock on the AC 6080 Injector pump? |
Replies:
Posted By: DougG
Date Posted: 31 Jan 2022 at 6:27pm
| As your looking at the pump theres a bolt- takes a 1/2 wrench loosen it up - 6080,s are a bear too bleed, takes time or a small electric inline fuel pump helps |
Posted By: victoryallis
Date Posted: 31 Jan 2022 at 8:15pm
Huh? I usually get by just fine opening the bleeder on the fuel filter then crack a line or two at the injectors. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
DougG wrote:Posted By: DrAllis
Date Posted: 01 Feb 2022 at 6:30am
| The more fuel in the tank, the better. Loosen bleed wing nut on top of the filter base and wait for fuel to run out with no sign of air. Then, go down to the injection pump INLET TEE and loosen the plastic knurled nut on the top of the tee until you again have a steady stream of fuel and no air. Not usually needed to crack injector lines, but one or two is enough, UNLESS you are starting the engine for the first time after an injection pump overhaul, which you don't say. |
Posted By: injpumpEd
Date Posted: 01 Feb 2022 at 9:33am
|
With the asking of vague questions, it makes me think it is a tractor that has been sitting and the op thinks it just needs bled, but likely the pump plungers are stuck from sitting. These usually aren't that hard to bleed out. ------------- 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! |
Posted By: DougG
Date Posted: 01 Feb 2022 at 10:00am
| Good point Ed, tell us what's going on with the 6080 first! |
Posted By: REM
Date Posted: 01 Feb 2022 at 5:28pm
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I just bought the tractor a few months ago. It has been running fine but a couple weeks ago in the cold weather it just quit on me while haying cattle. I let it sit for a while and it started back up. I was able to drive it back to the house and then ran it on idle for about 15 minutes with no problems. I shut it off and it sat for about a week. It started right up about a week ago. I drove it about 10 yards and then it quit again. Could not restart it. My assumption was that it wasn't get fuel so I checked and there was fuel to the filter. Then I wanted to make sure there was no air between filter and pump. So that is where I am right now. |
Posted By: injpumpEd
Date Posted: 01 Feb 2022 at 5:43pm
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return circuit is pluging up due to the internal flex ring breaking apart. It will likely be due for a pump service soon. Clean the top return fitting out or knock the ball out to buy a little bit of time. It is only a temporary repair. ------------- 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! |
Posted By: DrAllis
Date Posted: 01 Feb 2022 at 5:44pm
| Remove the fuel tank shut off on the right side bottom of the tank and let some fuel run free. Clean the shut off valve while removed. If you don't do this FIRST, you will be chasing your tail. |