HD6G final drive lubrication
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=194494
Printed Date: 31 Oct 2025 at 8:40am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD6G final drive lubrication
Posted By: doctorcorey
Subject: HD6G final drive lubrication
Date Posted: 07 Apr 2023 at 7:34pm
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I'm changing the fluid in the finals. I don't have a master service manual, and my small final drive manual makes no mention of type and quantity of fluid. If I recall on my 7G, it was filled with gear oil up to a bit below the fill plug. That's been 10 years ago, so I need the right oil spec and approx. quantity needed. I'm all but ready to start pushing dirt. I'm sumping everything on this tractor, the humidity and rapid temp changes around here lately is dumping condensation in every system. Cheers. ------------- Semper Fi USMC 1958 HD6G, 1959 MF 203 loader, 1960 Case 420B Backhoe, MF 65 Tractor/Loader Diesel |
Replies:
Posted By: Coke-in-MN
Date Posted: 07 Apr 2023 at 7:52pm
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Fill level is determined by filling the case from the 2 plugs in the extensions on back of case to proper level . Using a GL5 lube as there are timken bearings on all shafts and gears that run on bearings . I would use a lube higher than #90 wt - say 120 /140 Capacity - unsure without finding my book but same on HD 5 or HD 6 as they use same rear case . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: doctorcorey
Date Posted: 07 Apr 2023 at 8:28pm
Thanks, Coke. I'll fill it 'till I can see it in the 'filler tube'. I'll be using thick stuff 'cause my left final weeps 'a little'.  It looks like it can hold several gallons...------------- Semper Fi USMC 1958 HD6G, 1959 MF 203 loader, 1960 Case 420B Backhoe, MF 65 Tractor/Loader Diesel |