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D Grader - help! Rear wheel shaft seal replacement
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LangdonStevenson View Drop Down
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Joined: 03 Jun 2023
Location: Australia
Points: 75 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LangdonStevenson Quote  Post ReplyReply Direct Link To This Post Topic: D Grader - help! Rear wheel shaft seal replacement
    Posted: 8 hours 30 minutes ago 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:

  1. Drain the oil in the chain box
  2. Dismount the rim from the wheel
  3. Remove the wheel (this is going to be seriously hard and probably require an hydraulic puller)
  4. Remove the outer bearing retainer
  5. Remove the old seal
  6. Install the new seal in the retainer
  7. Replace the retainer, probably with a new gasket
  8. 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!
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Les Kerf View Drop Down
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Joined: 08 May 2020
Location: Idaho
Points: 1629 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 55 minutes ago 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
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steve(ill) View Drop Down
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Points: 90661 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 29 minutes ago 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.
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Les Kerf View Drop Down
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Joined: 08 May 2020
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Points: 1629 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 55 minutes ago at 1:42pm
Originally posted by steve(ill) 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 Wink I could be wrong too Tongue
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