Construction and other equipment - H-3 Final Drive Lube Recommendations

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H-3 Final Drive Lube Recommendations

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=76237
Printed Date: 28 Jun 2025 at 10:54am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: H-3 Final Drive Lube Recommendations

Posted By: orangeman
Subject: H-3 Final Drive Lube Recommendations
Date Posted: 02 Sep 2013 at 8:27pm

Guys: Looking to freshen up the oil in the final drives. I got the plugs free assuming they should be full up to the plug level.

Anyone have a good recommendation for the lube for the final drives?

Appreciate any insights... Thank-you Orangeman

Replies:

Posted By: Tracy Martin TN
Date Posted: 02 Sep 2013 at 10:28pm

I would use 80-90 wt gear oil. HTH Tracy Martin

Posted By: Coke-in-MN
Date Posted: 02 Sep 2013 at 11:07pm

the 90# or 85/120 gear lube - If you never had the lower case open it might not be a bad idea to check IF any debris is settled into lower part of case.

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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: orangeman
Date Posted: 03 Sep 2013 at 4:02am

Guys: This machine is a 1961 and has the heavy cast final drive pans on it. As always, thank -you for the excellent information. Orangeman

Posted By: Old Yeller
Date Posted: 16 Sep 2013 at 9:48pm

Orangeman, I am brand new to this forum but have done a little snooping around before joining and see that you have a lot of good posts regarding your 1961 H3 dozer. I just recently purchased a similar dozer and haven't even been able to haul it home yet. I have ZERO knowledge about dozers and do not consider myself a "mechanic" but I am looking forward to learning while I try to get a few small projects done. I did find an Operators Manual (TM-268) that applies to the H3, and calls for SAE 20-20W oil in the final drives. Since it looks like you might be going with the gear oil, I am wondering if the manual is wrong or why folks are recommending the gear oil. What did you end up using and how is it working?

Posted By: Dozer
Date Posted: 17 Sep 2013 at 7:26am

The owners manual for my HD6G says 50 wt motor oil in summer and 30 wt in winter. I have been using universal transmission/hydraulic oil. Most people on this forum use 90 wt or 85W140 GL5 oil. If your final drives leak I can understand that the heavier viscosity oil might leak out slower. I owned an HD7 where the previous owner used wheel bearing greese. That didn't work as I had to replace the final drive bearings.