oil tank filter 66-8323

[Greenfield]

B and M group bikes of the late 30's had an oil filter in the oil tank, part no 66-8323. I'm guessing it slipped over the oil return pipe with a flange sitting in the neck of the filler. I can't find a supplier. Can anybody point me in the right direction or post a photo with the dimensions so that can can make one?
Cheers

[Group Leader]

Photo #1 is what I found in the oil tank (along with a load of sludge, some old Wet & Dry paper .......   Previous Owners a?  )

I cleaned the perforated tube up and attached two brass rings to the ends to help stop the tube cutting through the felt.    My oil return pipe has a cup at the bottom that the filter sits in and the sprung loaded top cap seen in Photo #2.

Mrs Groupleader very kindly sewed up a new felt filter tube on  her sewing machine.  Photo #3.    The felt tube was wetted, past through the perforated tube and the ends of the felt were gradually persuaded to go back on themselves and then the assembly was left to dry thoroughly resulting in Photo #4.

You might be able to scale  the photograph.  Unfortunately I can't remove the filter to measure it until I do an oil change (as all the muck falls out of the bottom of the filter into the oil when you do so ..... )


Alan

[Group Leader]

As a reference dimension; the overall diameter of the top cap flange = 43mm.

This is how the filter sits in the tank.  Note how little of the tank contents you can see and hence the non-standard, annoy the purists, but highly functional oil sight tube.

[Greenfield]

I finally got round to making one. I started with a round brass box, piece of brass sheet and some very fine brass gauze. Using the diagram in the parts book plus measurements of my oil tank, this is what I put together.