Farm Equipment - MM GBD/Use PSB Pump?

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MM GBD/Use PSB Pump?

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=43019
Printed Date: 31 Aug 2025 at 12:26pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: MM GBD/Use PSB Pump?

Posted By: Chris/CT
Subject: MM GBD/Use PSB Pump?
Date Posted: 31 Dec 2011 at 7:01am

I have a buyer of one of my PSB pumps, he looking for a spare/parts unit for his MM GBD, did they use the Buda engine also, or which engine used the same pump, I assume [ he must have done homework] that these WD45D/PSB pumps are interchangeable.

Replies:

Posted By: DrAllis
Date Posted: 31 Dec 2011 at 7:16am

No, a MM has an MM engine not a Buda. Injection pumps are kind of like a Holley carburator.....fits many applications with minor differences.

Posted By: injpumpEd
Date Posted: 31 Dec 2011 at 11:16am

basically, most all (except IH) us tractors (diesel) in the 50's used a psb pump. AC, CASE, MM, OLIVER, MH, I'm sure I'm forgetting some. I always thought it was weird how once everyone else quit using Am Bosch pumps, IH went to the M100 on the 66 series and up. Then AC in 82.

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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!

Posted By: DrAllis
Date Posted: 31 Dec 2011 at 3:23pm

I always assumed the Bosch fell out of favor to the Roosa-Master because of $$$$$$, with Roosa being cheaper.