Farm Equipment - Injector Pump Parts

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Injector Pump Parts

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=35380
Printed Date: 03 May 2025 at 2:08pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Injector Pump Parts

Posted By: Clay
Subject: Injector Pump Parts
Date Posted: 11 Aug 2011 at 6:23pm

After studying the Service Manual for the Allis Chalmers Fuel Injection Pumps and much online research, I have just about decided to rebuild the Roosa Master DBGFC637-54AF injector pump for my 180 myself.
Called around for exchange pumps and to re-builders for pricing. Exchange pumps from $700 and up to over $1,000. Depending upon the problem with the pump, rebuild from $300 to $1,200.
Two things I know my pump will need is the flex ring and the pilot tube. Also a seal kit.
The last time I was inside an injection pump was when I was in college in the mid '70s.
My next problem is a good, reliable and reasonably prices parts supplier.

Replies:

Posted By: DougG
Date Posted: 11 Aug 2011 at 7:44pm

I was told that 30 bucks is all it costs in parts to rebuild an injector pump on a 180 ; dont know how true it is ? I called a pump shop on a rebuilt one while back and it was $1000 ; I asked why , everyone else was $450-500 ; he said they are RARE ; interesting selling point i guess but WRONG ANSWER ; Andrew Gubbels does a good job and VERY resonable

Posted By: Clay
Date Posted: 13 Oct 2011 at 1:00am

IT IS ALIVE!!!
At 5 minutes after midnight, I started my 180 diesel. Poor old girl had a bad flex ring and it took me a while to get around to fixing her.
With the help of a rebuild manual, parts kit and a couple of conversations with a couple of pump technicians I rebuilt the pump myself. The last time I saw the inside of an injector pump was when I was a freshman in college.
The pilot tube had a groove so it got replaced. The pump vanes need to be replaced but that will have to wait until I obtain a new set. The flex ring was shot and was replaced. Measured the rollers and met the specs. Also replaced the check valve.
With shipping, I have $100 invested in the pump.

Posted By: Jim Hancock
Date Posted: 13 Oct 2011 at 1:10am

Sounds like there might be a sideline business in the making! Way to go on getting your pump repaired.

I was also in college in the mid seventies and it would take me awhile to refresh my memory on rebuilding those things.

Have a good one Clay.

Posted By: Brian Jasper co. Ia
Date Posted: 13 Oct 2011 at 6:25am

Glad to hear you got it together. I know my D17D needs the flex ring too. Same scenario, last time I did one was in trade school. So far I haven't gotten the courage to do it...

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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford

Posted By: Clay
Date Posted: 13 Oct 2011 at 8:10am

One thing I did, which no one suggested, was to take pictures.
These pictures were taken at several angles. This made it easy to know which fuel line went where.

Posted By: JPG AUSTRALIA
Date Posted: 13 Oct 2011 at 8:14am

whats the rebuild manual called? just wondering because there used to be a few on ebay.

Posted By: Clay
Date Posted: 13 Oct 2011 at 9:16am

Service Manual for the Allis-Chalmers Fuel Injection Pumps Roosa Master D & DB Bosch PSB. I bought this manual on Ebay. Make sure you are buying a service manual and not a parts manual.

The 180 pump is a DBGFC637-54AF.
Roller to Roller Setting 1.951" +/- .0005