Skip to main content
English French German Italian Spanish

To seal or not to seal?

Forums

I've fitted a new main bearing to a mid fifties laydown box. It was double sealed so I removed the inner to allow lubrication. For that same reason I did not - originally - replace the steel shim/oil seal in the inner side of the bearing.

So two questions:

Should I fit a shim to take the place of the seal?

Is there any harm in simply refitting the steel seal?

Any views?

George

Permalink

I have an idea that the shim helps to ensure the correct end float on the main gear wheel but could well be wrong on that.

Is it a rubber sealed bearing or steel ("shielded")?

Permalink

You have done the right thing by removing the inner bearing seal. Now refit the original steel sealing shims, one either side of the bearing.

Permalink

Thanks guys. It's a rubber sealed bearing. There was only ever a steel sealing shim on the inner side of the bearing.

Permalink

The '56 parts book lists two "Main gear wheel oil retaining washers". A2/317 sits between main gear wheel and bearing (item 16 on the exploded diagram), A2/320 sits between gearbox shell and bearing (I can't see this one on the diagram).

Ian McD

Permalink

That's right Ian but there wasn't one there and I note that in MIck Hemmings' DVD on gearbox rebuilds he says that there is a space for a seal between bearing and shell but he's never seen one fitted and wonders if they were dropped.

 


Norton Owners Club Website by 2Toucans