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allis chalmer wd40

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=207523
Printed Date: 27 Jul 2025 at 12:16pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: allis chalmer wd40

Posted By: rhesamc
Subject: allis chalmer wd40
Date Posted: 19 Jul 2025 at 7:43pm

I cannot find a timing mark on the flywheel. I don't seem to see an inspection plate either.. I took the plate at the bottom of the flywheel off and rotated engine, but I cannot find a timing mark. I assume I am doing something wrong. Please somebody help me. Rhesa McKnight

Replies:

Posted By: IBWD MIke
Date Posted: 20 Jul 2025 at 4:44am

They are there, you may need to wipe the flywheel clean with some brake-clean and a rag to see them.

Posted By: DrAllis
Date Posted: 20 Jul 2025 at 7:14am

This is easy on a WD-45. Remove the clutch housing cover complete from underneath the flywheel. Rotate the engine until the crankshaft pulley setscrew is pointed exactly straight down. If you do this, the TDC Mark will be right there on the bottom edge of the flywheel. It's probably covered in rust and will need cleaning. There are two marks: TDC and "F" or "FIRE" which is 30 degrees BTDC. A properly timed engine is the FIRE Mark at wide open throttle.

Posted By: steve(ill)
Date Posted: 20 Jul 2025 at 7:44am

wire brush or 100 grit sandpaper and good ways to cleanup the area..

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Like them all, but love the "B"s.

Posted By: SteveM C/IL
Date Posted: 20 Jul 2025 at 1:49pm

Even cleaned up they are hard to see. Mark the FIRE line with white paint or something so it's visable when viewing with timing light. If it has M&W's it might be closer to 25Deg advanced. They were higher compression and detonate at 30.

Posted By: 55allis
Date Posted: 24 Jul 2025 at 5:18pm

Hmm, I wonder if I put my wd fly wheel back on right?
Didn’t know there was any marks on the fly wheel when I put rear crank seal in….
Is there 3 ways the fly wheel will go on wrong?

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1955 AC WD45 diesel with D262 repower, 1949 AC WD45

Posted By: DrAllis
Date Posted: 24 Jul 2025 at 6:05pm

Flywheel only goes on one-way.

Posted By: Walker
Date Posted: 24 Jul 2025 at 6:22pm

If you are looking under WD 40 it's easy to understand how you may have gotten inaccurate information. Best and most sure way to find a timing mark is remove one plug, replace wire and hand it to your wife while saying hold this, turn ignition on and rotate flywheel until you find it or notice some other indicator you are close.