HD6AG Undercarriage
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=95942
Printed Date: 19 Jul 2025 at 7:25pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD6AG Undercarriage
Posted By: HD6AG
Subject: HD6AG Undercarriage
Date Posted: 05 Oct 2014 at 7:29pm
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Hi, I am new to the forum and was wondering if anyone has the new spec dimension and maximum wear limit for all of the undercarriage components of an HD6AG (rails, rollers, idlers, carrier roller, pins and bushings, etc.). The tractor is a turbocharged 5 roller farm unit and the serial number is 20702. I am trying to assess the overall condition of my undercarriage. Thanks for your help! Andy
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Replies:
Posted By: DiyDave
Date Posted: 05 Oct 2014 at 8:08pm
| I think Coke can help you out, He'll chime in, if so... |
Posted By: Dozer
Date Posted: 06 Oct 2014 at 7:46am
| You have a 1967 model HD6 Look at the front idler position on the slide bar. If it is at the forward end the chain is warn out unless someone removed a link. If the chain pins are worn by the truck wheels then the rail height and/or the truck wheels are worn. Look at the bushings are they round? This assesses overall condition but does not give you a wear percentage. The greater problem is getting parts. Can you post pictures? |
Posted By: DMiller
Date Posted: 06 Oct 2014 at 8:09am
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HD6, I am not sure if all inclusive, should be 6.5" pitch, the way this is measured is across four links. At the front or back edge of a link pin, with the rail snug tight, measure to the same edge of the fifth pin away, that will be across four full links. This measure gets divided by four to reach the single average link measure and while hard to believe 6.65" or .150" longer than new is worn 100%. link: https://sites.google.com/site/crawlerheaven/wear-limitpinsandbushings I cannot ever get links to load so you will have to cut/paste. |
Posted By: DMiller
Date Posted: 06 Oct 2014 at 8:11am
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This is the track chart they started to build: https://sites.google.com/site/crawlerheaven/wear-limits---tracks |
Posted By: Coke-in-MN
Date Posted: 06 Oct 2014 at 9:16am
------------- 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: HD6AG
Date Posted: 07 Oct 2014 at 6:48pm
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Thank you to everyone for responding to my questions. Just curious but are the track gauges that Coke showed available? As well, I assume from the gauge that the maximum amount of wear to the diameter of the roller is 1/4". Does anyone know what the new measurement is? On the front idler, I assume there is 1/2" of allowable wear to the diameter of the rolling surface? What is new spec? Just trying to make do without the track gauge. Thanks, Andy |
Posted By: ac_sd
Date Posted: 07 Oct 2014 at 6:54pm
| Send me a message with your email and I'll scan and send you the OEM specs on HD-6 rollers, rails, etc... Great little tractors!!! |
Posted By: HD6AG
Date Posted: 07 Oct 2014 at 9:09pm
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HI, I sent you a message with my email address. Thanks for your help! Andy |