Farm Equipment - Allis G, N62 Engine

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Allis G, N62 Engine

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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=129825
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Topic: Allis G, N62 Engine

Posted By: K-Mo
Subject: Allis G, N62 Engine
Date Posted: 10 Oct 2016 at 10:30am

Allis G, N62 Engine.

1. Tore the engine down and fond the source of knocking to be #1 and #4 rod bearings. Mains and #2 and #3 okay. Looks like oil has to go through rods 1 and 4 to get to 2 and 3 bearings. Oil channels are clear. Anyone have an explanation?

2. Checked on replacement governor assembly. Replacement offered is a "ball" type. My source says the "book" says interchangeable. Does anyone have first hand experience of replacing the weight type with the ball type on the Allis G?

Thanks,
Kent

Replies:

Posted By: Dusty MI
Date Posted: 12 Oct 2016 at 6:47pm

I have a '48 G that has a knock when it is not under load.

Was your knock all the time, or only under load, or no load ?

Thanks,

Dusty

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917 H, '48 G, '65 D-10 series III "Allis Express"

Posted By: Gordy
Date Posted: 12 Oct 2016 at 6:59pm

I have a ball type that came on a parts engine, Had a good weight type so didn't use it $10 plus shipping if you can use it.

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“If you can't explain it simply, you don't understand it well enough”

Posted By: K-Mo
Date Posted: 13 Oct 2016 at 12:04pm

Dusty,
My knock intensity varied at different RPMs. Knock could be "tuned" in or out by adjusting distributor timing at idle.
Engine knocks can be a little mysterious. They can vary from dull to sharp as well as rattle.
A knock under load could be just ignition timing or carbon build up. A duller sounding knock could be main bearings. Not that I want to tell you to go stick a hose in your ear, but that would be one way to try to locate the source of the knock. Put one end up to your ear and the other to various ares of the engine.
Timing. At low idle #1 should fire at Top Dead Center (TDC). When using a timing light, increasing the rpm should cause the timing mark to advance.

Kent

Posted By: K-Mo
Date Posted: 13 Oct 2016 at 12:08pm

Sounds like something I'm willing to take a chance on.
You could call me at 712-243-9782. If no answer, leave a message. We have to screen out the politicians and telemarketers.

Posted By: K-Mo
Date Posted: 13 Oct 2016 at 12:39pm

Dusty,
Sorry, I misread your post as a knock under load.
If you GOOGLE "Continental L-Head.pdf" you will find a downloadable service manual. Near the end of the service manual it has a troubleshooting section where knocks are addressed.
Kent