Modern lip seals

[Biddlecombe]

I have searched and I have asked suppliers but cannot be sure. When replacing the felt seal in the diff end of the half shalf with a modern rubber lip seal, do you do away with the seal cup? Are there any other parts needed?

[Ruairidh Dunford]

There are two types available.

One dispenses with the cup, washer and circlip - it it glued in place.

The other simply presses inside the cup, in place of the felt seal.

[Austin in the Shed]

I've only fitted them once and can't remember what size seal I actually used.
The half shaft bearing dia on the later axles,post '28 are .890 which is an awkward size.Not fractional imperial or close to a metric size.The closest I can find is 22.40mm,.882" and you will have to make a top hat sleeve to adapt to the bore of the axle. Unless someone knows better.

.

[Terrytuned]

See Axle oil leaks Bristol A7 club technical web site for update on axle oil seals. Terry.

[Biddlecombe]

So hopefully the seals that I have just bought from Seven Workshop will go in the cups and fit OK. First try seems a very tight fit in the cup. Hey ho press on. I've got new felt back ups.

[Ruairidh Dunford]

I usually remove a little material from the outside of these with a wire wheel - they usually sit in more easily after that.

[Stumpi]

The one's I fitted recently from A7c just pressed in.
I have made up a tool to fit them from PVC just a spigot on a piece  of round bar a few thou less than OD,square them up and tap in.
I also put a smear of grease on the lip and check half shafts for  damage,use a stone to clean any marks on assembly.
Andy

[Biddlecombe]

The one's I fitted recently from A7c just pressed in.
I have made up a tool to fit them from PVC just a spigot on a piece  of round bar a few thou less than OD,square them up and tap in.
I also put a smear of grease on the lip and check half shafts for  damage,use a stone to clean any marks on assembly.
Andy

Hi Andy, but did you put them in the cup first or straight in the casing. I am talking about the differential end and not the hub seals.
Regards
Peter

[Terrytuned]

Seal size, seal fitted see photos metric seal 23x38x8.

[Dennis Nicholas]

There are two types available.

One dispenses with the cup, washer and circlip - it it glued in place.

The other simply presses inside the cup, in place of the felt seal.

Can't remember which of the sizes I used but in my "heavy" axle, July 1937 onwards, there was what appeared to be a ring pressed into the casting and the seal pressed into that.

A TIP....one of our Scimitar club knowledgable engineering developers tips that when fitting get a rag soaked with Molyslip and rub well into the lip area.  This goes for any seal in any position (even seals round disk break pistons).

Dennis