Construction and other equipment - D Grader - help! Rear wheel shaft seal replacement

D Grader - help! Rear wheel shaft seal replacement

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=210514
Printed Date: 25 Mar 2026 at 4:57pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D Grader - help! Rear wheel shaft seal replacement

Posted By: LangdonStevenson
Subject: D Grader - help! Rear wheel shaft seal replacement
Date Posted: 25 Mar 2026 at 7:07am

Well, it's been a while since my grader was running and it's finally ready for new hydraulic hoses after replacing all of the spools and adding power steering to it! But before it's ready to work again, I need to replace the seal on the left rear wheel shaft. I have a diagram of the assembly from the manual as shown below.

The question is: how to replace the seal? From what I can see I will need to:

Drain the oil in the chain box
Dismount the rim from the wheel
Remove the wheel (this is going to be seriously hard and probably require an hydraulic puller)
Remove the outer bearing retainer
Remove the old seal
Install the new seal in the retainer
Replace the retainer, probably with a new gasket
Reassemble wheel.

Does that sound right? I expect there's no way to get around pulling the retainer off, but thought it was worth asking the group.

Thank you in advance to anyone who can offer any insight!

Replies:

Posted By: Les Kerf
Date Posted: 25 Mar 2026 at 8:42am

I have never so much as touched a model D grader but looking at the drawing it appears that you are on the right track.

That tapered shaft is probably going to require a serious puller, as you noted above.

It may be possible to use a slide hammer to remove the seal once you get the wheel off, but it may be wise to remove the bearing retainer anyway in order to inspect the bearing as it could be the root cause of the seal leakage.

Best wishes on your project! Smile

Posted By: steve(ill)
Date Posted: 25 Mar 2026 at 9:08am

look close at the drawing.. It shows the seal installed from the INSIDE and has a lip to keep it from falling OUTWARD toward the wheel....

-------------
Like them all, but love the "B"s.

Posted By: Les Kerf
Date Posted: 25 Mar 2026 at 1:42pm

steve(ill) wrote:

look close at the drawing.. It shows the seal installed from the INSIDE and has a lip to keep it from falling OUTWARD toward the wheel....

Hmmm... the arrows in the drawing do tend to obscure things a bit, but it still looks to me like there is a lip to the inside of the seal just above the point of the arrow on the left side. The diagonal lines indicate that portion of the retainer to be contiguous with the main body.

I think

I could be wrong too Tongue