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MG MGA - Brass Speedo Drive Seal ?

Does anyone know how the brass speedo drive housing seals into the gearbox.

Is it a fibre seal / rubber seal / Copper Washer ?

http://mgaguru.com/mgtech/books/spl/spl_tc_f.pdf

I "think" it's defunct part number 51K3169

modern comined MGA/MGB geabox gasket sets contain the MGB speedo drive gasket and a fibre washer which I have no idea what it's for as it's too small for the MGA speedo drive.

Many Thanks
Mark


Mark Hester

Mark

Just had a look at my 1500 gearbox lying in the garage. It's a copper washer. 1.25"OD, 1"ID

Steve
Steve Gyles

Hi Steve,

Any idea the size of the copper washer and if that part is used elsewhere under another part number?

The several gearbox kit's I have, don't contain any large copper washers.

Cheers
Mark

Mark Hester

Mark

Assuming we are talking about the same washer I have attached a photo of subject item and the drive unit.

Measurements are:

1.253 inches outside diameter
1.068 inches inside diameter
0.041 inches thick

Steve

Steve Gyles

There is also a rubber shaft seal inside the housing, and is required to work, because the speedo drive resides below oil level in the gearbox.
Barney Gaylord

That looks like the copper washer Steve.. .Many Thanks

I also don't have the rubber inside Barney.. Any idea's on what I do to replace this ?

Many Thanks
Mark
Mark Hester

Mark

Mine does not appear to have one either.

Steve
Steve Gyles

For seal replacement see here: http://mgaguru.com/mgtech/gearbox/gt106.htm
Barney Gaylord

Barney

Yes, Makes sense now. Mine is as your photo.

Steve
Steve Gyles

This thread was discussed between 21/03/2013 and 22/03/2013

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