Farm Equipment - B exhaust

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B exhaust

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=191563
Printed Date: 24 Oct 2025 at 7:26am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: B exhaust

Posted By: DaveWisc.
Subject: B exhaust
Date Posted: 30 Oct 2022 at 7:27pm

Can a exhaust be welded broke a front piece?

Replies:

Posted By: steve(ill)
Date Posted: 30 Oct 2022 at 8:37pm

you can try... Cast iron does not weld good to start with... when its 70 years old you have a lot of carbon and not much iron left.... I have repair the front or rear EARS on a couple with some luck.... Not much luck with cracks / rust out in the center port areas.

clean it real good... then clean it again...grind a bevel on both parts.. clamp them together in alignment.. heat with a propane torch to 250 degrees in the area an inch around the weld.......... i use 7018 DC stick on everything.. One short pass, then chip with hammer to get the flux off and releave stress .... after 1 minute, do another short pass or buildup... dont weave the rod, just do short beads.

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Like them all, but love the "B"s.

Posted By: DaveWisc.
Date Posted: 30 Oct 2022 at 8:46pm

Maybe easier to buy used one

Posted By: steve(ill)
Date Posted: 30 Oct 2022 at 9:02pm

yes.. if you have the time and expertise its worth a try.. If your going to pay someone to weld it, FORGET IT..

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Like them all, but love the "B"s.

Posted By: 1939Dodge
Date Posted: 31 Oct 2022 at 7:46am

7018 will wreck the parts. Preheat, use a nickel rod. Or BETTER, braze it with a brass rod and torch. It’s much easier on the iron parts and will prevent carbon from

Migrating into the grain

boundaries

Posted By: IBWD MIke
Date Posted: 31 Oct 2022 at 7:51am

As Steve says, cast iron is tricky to weld under the best circumstances. After 70 years of heat-cycling, probably near impossible. There are new ones out there, that's the way I've gone. Both of my CA's where new manifolds.

Posted By: DSeries4
Date Posted: 31 Oct 2022 at 10:12am

Better off getting a good used one. There should be millions of them out there.

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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

Posted By: HoughMade
Date Posted: 31 Oct 2022 at 11:08am

I have a new one from Steiner. High quality piece.

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1951 B