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HD6B Idler Rub

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=203774
Printed Date: 22 Nov 2024 at 8:00pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: HD6B Idler Rub

Posted By: Smokin Iron
Subject: HD6B Idler Rub
Date Posted: 22 Oct 2024 at 5:09pm

What would make the idler rub? Also please advise on how to lube idler if possible.

Replies:

Posted By: gemdozer
Date Posted: 22 Oct 2024 at 5:47pm

You could check your guide plate and the track idler slide bar each side from idler these could be worn and if you idler have no greace fitting you could drill a hole and instale one

Posted By: Coke-in-MN
Date Posted: 22 Oct 2024 at 6:53pm

The idler is held parallel on truck frame by wear plates which are held in place by dowel pins through truck frame ears . The full truck wheel and bearings is pushed forward by yoke of track adjuster that is dowel pinned to axle housing which is held true to truck frame by internal machined slide area - top and bottom of the axle housings .
Bad bearings , bent axle , worn slide wear plates , worn dowels , bent frame .
Alignment of idler to rear sprocket - for overall power path of the machine creating excessive force to align front idler to proper location .

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: Smokin Iron
Date Posted: 24 Oct 2024 at 9:37am

Thanks guys.. With all the replies and taking time to asses the condition it would appear that the wear plates are my problem. However I still need to find out how to lubricate the idler. I may resort to drilling and installing an alemite fitting. So is there a good place to drill that's recommended? Don't want to cause any trouble.

Posted By: Ray54
Date Posted: 24 Oct 2024 at 11:23am

The old style had a plug (3/4 inch hex head I think) in the center of the shaft. The old grease coupling for AC rollers is a 1/4 inch pipe looking thing about 6 inches long. Put the new grease in the back, forcing old grease out the opening. I have no idea where you would find one today.

The standard grease here was very thin white colored. I was told keep adding grease until new white grease was coming out.

Posted By: Coke-in-MN
Date Posted: 24 Oct 2024 at 1:03pm

When greasing rollers or idlers , they used oil or semi-grease like #000 - and it is not pressure fed but fed through a tube inserted into opening allowing old grease to flow out of cavity . Pressure greasing will blow out seals and allow contaminants to enter bearings

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: Ian Beale
Date Posted: 24 Oct 2024 at 5:30pm

"The old grease coupling for AC rollers is a 1/4 inch pipe looking thing about 6 inches long. Put the new grease in the back, forcing old grease out the opening. "

I made one for our FA 10. The plugs on it have the same thread as giant button grease fittings. I brazed a piece of 1/2" thin wall copper pipe on to one, with the pipe long enough to bottom out in the shaft hole and direct new lube to the back of the roller. Then ground a flat on the thread of the giant button to provide an area where the old lube can escape.

And diverted the bucket lube pump from our TD 6 to oil to do the lubing

Posted By: Smokin Iron
Date Posted: 25 Oct 2024 at 1:17pm

I'm grateful that we have knowledgeable people on this forum cause I can't just surf the net and get this info that you guys have provided. I will looking for the plug and finding a way to grease it based on the recommendations provided.