Farm Equipment - B gas tank

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B gas tank

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=170443
Printed Date: 25 Aug 2025 at 6:16am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: B gas tank

Posted By: Kiwi
Subject: B gas tank
Date Posted: 23 Apr 2020 at 3:22am

Hi all i have a gas tank off my B and it has a few dents in it. Am i best to weld a washer to the dent and use a slide hammer to pull the dents or has any one cut the tank in halve just below the rib knock the dents out and weld it back up any thoughts

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Tractors Allis EB,two C,diesel G

Replies:

Posted By: jaybmiller
Date Posted: 23 Apr 2020 at 5:45am

A good bodyman can weld studs, pull with slide hammer, grind off studs. it's a 'stud welder gun', Canadian invention BTW,... Guy next door does that all the time. New car tin is a LOT thinner than old tank tin !

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: allisorange
Date Posted: 23 Apr 2020 at 6:16am

Be careful welding on a gas tank.

John C

Posted By: Dusty MI
Date Posted: 23 Apr 2020 at 6:38am

You might try using the output of a shop vac to pressurize the tank which might push the dents out.

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917 H, '48 G, '65 D-10 series III "Allis Express"

Posted By: PaulB
Date Posted: 23 Apr 2020 at 6:45am

A shop vac can barely blow up a balloon, dents in a gas take a lot of pressure, Fill the tank with water and put it in the chest freezer, then monitor it closely. I have also use compressed air. Hook the hose to the outlet, Use a wide ratchet strap around the tank at the cap, Set it around the corner of a building and with a regulator, slowly add pressure.

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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY