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HD3 Gas Engines

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=3785
Printed Date: 03 Apr 2025 at 12:44pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: HD3 Gas Engines

Posted By: mark/indiana
Subject: HD3 Gas Engines
Date Posted: 16 Nov 2009 at 6:38am

Should these have a fuel pump?? Mine has one that is not hooked up...the fuel is fed just like on the gas tractors?? What industrial applications might have used a fuel pump?? Thanks, Mark

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mark/indiana..."My favorite Allis Tractor or Crawler is the one I'm sitting on at the time!!..

Replies:

Posted By: Bret (OH)
Date Posted: 16 Nov 2009 at 7:35am

Yes the H3 (which is what it would be if it were a gas) used a fuel pump. I would assume that since they could operate on more serious grades than a wheeled tractor the engineers thought a fuel pump was necessary.

Posted By: Kipn
Date Posted: 16 Nov 2009 at 9:22am

Mine has a fuel pump. The manual says it's a 3-4 pound pressure pump. If you have a gas dozer it would be an H3. HD3 means it's a diesel. HTH

Posted By: Calvin Schmidt
Date Posted: 16 Nov 2009 at 4:10pm

Mine has a fuel pump as well.

Posted By: Matt(MI)
Date Posted: 16 Nov 2009 at 7:41pm

Mine has one too. It'll run without it, but make sure to keep your tank at least 1/2 full if you'll be working any serious grades.

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Matt
http://www.smokypond.com/gallery/main.php - http://www.smokypond.com/gallery/main.php

Posted By: Harry up of Mi.
Date Posted: 19 Nov 2009 at 9:50pm

I have two H-3s, both have after market electric fuel pumps on them. They work fine. They are wired through the ignition switch.