Farm Equipment - Fire mark on flywheel

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Fire mark on flywheel

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=13912
Printed Date: 02 Feb 2025 at 5:02am
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Topic: Fire mark on flywheel

Posted By: Craig Reavley
Subject: Fire mark on flywheel
Date Posted: 15 Jun 2010 at 9:08am

If the FIRE mark is in the center of the round hole on the flywheel on a C does that mean that #1 cylinder is top dead center, or can it be off 180 degrees????For some reason I cant remeber. I guess 40 years old, and 25 projects on my mind is taking its toll.

Replies:

Posted By: countryguy828
Date Posted: 15 Jun 2010 at 9:13am

#1 would be at TDC but it may be ready to fire on #4, I look at the valves to see if both are closed on #1 or #4 to tell the difference. I am sure someone else will have a better description

Posted By: Ted in NE-OH
Date Posted: 15 Jun 2010 at 9:24am

Fire is NOT top dead center, it is advanced where it fires when running..

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CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914

Posted By: CTuckerNWIL
Date Posted: 15 Jun 2010 at 9:39am

TDC is top dead center. The fire mark is before top dead center. And you have to either look at the valve train or use the thumb in the number one hole to tell which cylinder is coming up on compression in order to tell if number 1 is getting ready to fire.

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF