Shops, Barns, Varmints, and Trucks

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Am I the only one?

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210691
Printed Date: 11 Apr 2026 at 5:10am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Am I the only one?

Posted By: Codger
Subject: Am I the only one?
Date Posted: 09 Apr 2026 at 5:13pm

6V-92TA in my "yard horse" stuck the fuel pump pressure relief valve open which of course kills suction to pull fuel from the tanks. Engine restarts readily with a pressurized fuel source feeding the primary fuel filter housing. I disconnected both the suction, and return fuel lines from the primary tank, plumbed in my primer pumping unit, started the engine and monitored the fuel retun hose. Nothing came back to tank with the engine ultimately starving out.

Think I'll order a rebuild kit as the pump is original from 1979. I "juiced" this engine up a bit back in 1980 including timing alteration and performance oriented injectors. It runs well and still starts easily. Never really has been an oil leaker either although it needs exhaust manifold gaskets.

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That's All Folks!

Replies:

Posted By: SteveM C/IL
Date Posted: 10 Apr 2026 at 8:29pm

Powerful for little engines. Sweet sound as well.

Posted By: Codger
Date Posted: 10 Apr 2026 at 9:43pm

I really like that old truck/tractor. Bad condition now but sure runs well.

This is a short video of fuel return on my 64 B-61ST Mack tractor that also had a stuck primer pump. This one is a plunger pump and after freeing it up I circulated a little cocktail formulation I like to break the sludge and varnish. I must have received a load of garbage fuel a couple of years past as never had problems prior.

https://youtube.com/shorts/bMzNjzSHrDs?feature=share" rel="nofollow - https://youtube.com/shorts/bMzNjzSHrDs?feature=share

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That's All Folks!