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New front diff seal leaking


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Hi Folks

The diff was stripped and refurbed to replace the oil seals which were toast and the diff refitted to a bare chassis. Since then its moved about twenty foot while I work on the shell to the other side of the garage and stood, guess what it leaks.:angry: I like to do things once and they last but it seems not this time.

I used a synthetic seal from Rimmers rather than a leather one which came out.

1) Can the seal be replaced without dropping the diff out?

2) Which is better synthetic or leather and who sells the best one?

Thanks again.

Andy

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Hi Andy,

  what was the state of the seal surface on the flange.  They do wear and worth replacing or sleeving when doing the seal.

You will need to remove the front support across the diff to remove the seal. The flange will come out with support in place.

 

Roger

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Hi Roger 

The flange didn't look too bad but now its leaked it probably worth sleeving it while I'm at it. No experience of sleeving shafts any idea which size or where to get one from? 

Cheers

Andy

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I think 99149 is the size you want. - for diff pinion drive flange.

We are doing a Girling rigid axle tomorrow so I will check the boxes of the speedisleeve we use on the pinion flange and the half shafts.

Cheers

Peter W

https://www.oit.edu/docs/default-source/facilities-services-documents/speedi-sleeve-size-listing.pdf?sfvrsn=2

https://www.skf.com/us/products/seals/industrial-seals/power-transmission-seals/wear-seals-skf-speedi-sleeve/index.html?designation=99149

 

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Thanks people for the info, Roger might be right by the time I've messed about and fit a new one for £60 and use the old one as a paper weight.

 

 

 

 

 

 

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If your flange is otherwise ok, I would use a speedy sleeve. This ensures your flange meets the original specifications, but the surface where the seals runs has a perfect and durable surface roughness.

Waldi

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I replaced the front seal on my TR5 diff only yesterday. I tried to get a leather replacement, but an order for one from both Rimmer and Moss resulted in them sending rubber (with no comment why). At about £4 each I didn’t return them, but a phone call revealed they didn’t have leather in stock or knew when or if any would be delivered. They both promote the Rubber as better seals. Diff not back in the car yet, but I hope I don’t have the same problem as Andy. What’s best guys, Leather or Rubber?

Mike

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On 3/12/2019 at 8:32 AM, RogerH said:

Hi Andy,

    Moss do new flanges at apprx £60. The speedisleeve will cost apprx £30 with all the faffing.

 

Roger

Better price for 99149 speedisleeve.

we fitted them yesterday

https://www.ebay.co.uk/itm/99149-SKF-Speedi-Sleeve-/222282904862?hash=item33c117f51e

 

Peter  W

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The leather seal when last bought were from Chicago Rawhide co.  The irs diff nose seal, Triumph 140337, I think was CR 15207 according to my interchange lists.  Was packed originally like this    https://www.radwell.co.uk/en-GB/Buy/SKF/15207

SKF now have the CR business and offer a nitrile seal under pt no CR 15207.  https://simplybearings.co.uk/shop/advanced_search_result.php?search_in_description=1&keywords=Cr15207&singlebutton=

 

CR 14423 has  smaller id but same  od  being 0.060” smaller   https://simplybearings.co.uk/shop/advanced_search_result.php?search_in_description=1&keywords=Cr14423&singlebutton=

 

So it looks like leather seals are replaced by nitrile items in the volume sales market.  

Cheers

Peter W

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in my professional life (refineries) we do not use leather seals; think that tells enough. 

But as with many parts: make sure you have a decent quality like SKF or Eriks.  No vendor -imprint is a weak signal. I would use a viton or silicone seal, given the very high operating temperature of the diff, certainly not nitrile or buna, which is what is most common. They will harden/get brittle and start leaking.

Waldi

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I agree with Waldi, I'd take the old seal to a bearing/seal supplier and ask for an SKF or Garlock equivalent in Viton and I'd run it on a Speedisleeve or get the flange built up with flame spray and machined back to the original tolerances.

I've never had any bad experiences with SKF or Garlock stuff but I've had a few with elastomeric parts from the big TR6 part suppliers. 

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My seal was weeping so it was replaced when the diff was out for mount repairs. The new seal collapsed with 100kms, oil everywhere. A new one went in and it also weeps.

We used a speedisleeve, I think the quality of the seals is a problem.

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