Construction and other equipment - Fuel Pressure Gauge?

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Fuel Pressure Gauge?

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=40736
Printed Date: 24 Jun 2025 at 5:10am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Fuel Pressure Gauge?

Posted By: Jay Tyrrell
Subject: Fuel Pressure Gauge?
Date Posted: 18 Nov 2011 at 6:17am

There is a line hanging down (HD6G) from the Fuel Pressure guage on the dash.

Where is this suppost to be connected to?

Does this messure fuel pressure before the injector pump?

Is it supposed to tell you when to change filters?

Replies:

Posted By: Mactractor
Date Posted: 18 Nov 2011 at 11:41am

The gauge was just to show you have supply pressure to injection pump. The line came off secondary filter. You will see the spare port. Filters must be changed regularly. I do mine at 200 hour mark with engine oil. Regular fuel filter changes must be done to keep your injection pump in good order.

Posted By: orangeman
Date Posted: 18 Nov 2011 at 3:59pm

Mac, Coke or Merv: Who or what company manufactured the injectors for the HD6. I don't have my machine home yet, so cant really tell. I know the parts book does not specify. If I had to guess I would say American Bosch since my pump is American Bosch.

Any help appreciated. Orangeman