Construction and other equipment - HD5 final drive seal

Print Page | Close Window

HD5 final drive seal

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=138616
Printed Date: 03 Aug 2025 at 9:22am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: HD5 final drive seal

Posted By: dadsdozerhd5b
Subject: HD5 final drive seal
Date Posted: 20 May 2017 at 9:12pm

I just put final drive seals in my dozer, put them all together, moved it a few times with the tracks off, finally put the track frames and tracks on and moved it around today and the left one started leaking. Any experience? Should I run it and see if it seals or take it apart and see what is up? They go in easy so I can't imagine what went wrong. Glued them in with the proper glue and had resistance on the seal.

-------------
HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.

Replies:

Posted By: Dozer
Date Posted: 21 May 2017 at 6:53am

I assume it is the inner seal. I think the steel seal slipped off the drive pins in the spring assembly. I put gear oil between the steel seals during assembly. If I am correct the situation will get worse if you don't fix it now. My best guess Good luck

Posted By: dadsdozerhd5b
Date Posted: 21 May 2017 at 1:43pm

I did oil the steels during assembly. it is the inner seal, naturally I have to remove the track and track frame to get to the sprocket. I figured I better get it now before I go any further in assembly but was hoping for the best. I know they would leak occasionally and then stop, usually due to temperature change. not happy about it that is for sure as I need the dozer. thanks for your reply.

-------------
HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.

Posted By: Coke-in-MN
Date Posted: 22 May 2017 at 9:09am

I had the same happen to the input seal on the transmission - problem is now the yoke seems to be stuck on splines and so far have not been able to remove the yoke -

Need to check one rear sprocket seal also as it started weeping last fall .

Guess after 40 years of owning the machine i need to keep up on things better - still the same rear seals as when i bought the machine - just welded on sprocket rings when I put the new track on .

-------------
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: Coke-in-MN
Date Posted: 22 May 2017 at 9:12am

On a HD5B I had rather than remove the truck frame - I cut the end of the frame that holds the outboard bearing - I made a jig to hold that section in line before torching it off - then when going back together after replacing sprocket, bearings, and seal I installed the jig and welded cut off section back in place .

-------------
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."