Removal of Oil Level sight glass on Harrison M250

I wish to replace the oil level sight glass units on my Harrison M250 lathe.

The problem is - how do I get the old ones out? The replacemjents are "drive in" - not threaded.

S J Curtis

Push it out from behind?

Or are you saying that your old ones are threaded?

You mean a brass frame held in by rivets 'driven in' to drilled holes?

You could shear off the top of the rivets, centre punch, then drill them out.

Neil

Ive got new oil windows waiting to go into my Harrison L6 but havent got round to doing it yet. As fsr as I am aware they are just push fit. I read an article that suggested if the window is plastic, you can heat up the end of a screwdriver/pry bar and push it through the plastic window from the front at an angle so that the end of the screwdriver just protrudes through one of the oil windows rear openings, wait for the plastic to reharden and then pry them out. Feels like a "point of no return" job, but without access to the rear, there really is no other option other than to "dig" them out. I'm sure if you get the screwdriver at the right angle, and use something like a small wooden block as a fulcrum they should pop out ok (famous last words)

Graham

And for further info, Here is a picture of the two sizes of oil windows found on the L6.

The one of the left is the DW4064/A which is 7/8" O/D. I believe this is the one that is used on the M250, although the manual seems to misprint the part number for the oil window in the saddle.

The one of the right is the DW4062/A which is 1-1/2" O/D

Hope this helps

Graham

Graham

The old screw driver method is the best way to do it

Dave

Sorry I forgot to include Shelley in my last reply

Dave