Farm Equipment - diesel 170 intake question

Print Page | Close Window

diesel 170 intake question

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=49085
Printed Date: 25 Aug 2025 at 6:43am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: diesel 170 intake question

Posted By: jmm
Subject: diesel 170 intake question
Date Posted: 16 Apr 2012 at 4:30pm

hello,

on the intake of my 170's intake manifold is a port of some kind with what looks like a connection point for a wire. Also, I'm not sure if this should be the way it looks, but a line runs to a bulb in the engine return line. Can anyone give me an idea if (1) this is correct, and (2) what the purpose for this peice is?

Replies:

Posted By: Eldon (WA)
Date Posted: 16 Apr 2012 at 4:36pm

It is the pre-heat system that Perkins used. I haven't had one that worked yet.....

-------------
ALLIS EXPRESS!
This year:

Posted By: jmm
Date Posted: 16 Apr 2012 at 4:38pm

and I suppose you've had a few, from the pictures i've seen. I did see a factory plugged hole on the dash. Is that what it is for? and... the fuel bypass job? my fuel return line broke, so I figured on bypassing it, and the fuel bulb ( I'm guessing that it has a small restriction to push fuel to the preheat). thanks for the reply

Posted By: Eldon (WA)
Date Posted: 16 Apr 2012 at 4:45pm

I think it is supposed to work off of the ignition switch, turn all the way clockwise, then release. Someone said you should hear a "poof" or see some smoke out of the muffler, but the one I think might work doesn't do that. It does seem to start easier if I click the switch a few times.

-------------
ALLIS EXPRESS!
This year:

Posted By: MACK
Date Posted: 17 Apr 2012 at 7:07am

Hold the switch until you hear it ignite. It heats the fuel that is in it until it burns causing a small fire in manifold. MACK