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Post by djm16 on Jul 26, 2020 7:14:45 GMT
I have my rusty heater box out for dismantling, stripping and repainting. The trouble is that I am not sure what is the least destructive way of removing the internal flaps and levers.
It looks as though the internal flaps have been spot welded to their shafts after both have been installed in the box. Do I really have to drill out the spot welds first?
Is it possible to drift any of the levers off the end of their shafts?
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Post by 3litrekiwi on Jul 26, 2020 8:59:50 GMT
I've recently rebuilt mine. The little diecast levers are splined on but will pull off if you are careful. You will need to mark the position and take a photo of each end so you have some reference. I rebuilt a second unit so had my original for reference and spares. The other ends are held on with small press on spring washers that will also prize off if you use a tool that hooks under to release the teeth from the shaft.
I used various thicknesses of neoprene wet suit material to replace the seals on the flaps as the cloth surface sticks well to the contact adhesive and should make the sealing surfaces last well. 3mm and 6mm if I recall correctly.
cheers
Martin
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Post by djm16 on Jul 26, 2020 10:48:09 GMT
Thanks. I did figure it out for myself too. There are a shed-load of fiddly parts to zinc plate!
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Post by Sam Bee on Jul 27, 2020 18:00:38 GMT
I have yet to tackle mine so thanks for useful info.
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Post by djm16 on Jul 28, 2020 4:47:26 GMT
There are three levers that are mounted on posts that are crimped in place in the box. The levers are held on the post by the end of the post being knurled over. Removing the lever from the post also strips off the knurled-over lip.
I was planning to drill and tap the posts to take a retaining screw and washer, but anyone have any other suggestions.
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Post by 3litrekiwi on Jul 28, 2020 9:52:20 GMT
I remember giving some of the die cast fittings a polish with a soft wire brush, masking them and spraying the case with them in place so maybe I decided not to disturb them.
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Post by djm16 on Jul 28, 2020 11:02:30 GMT
I am having a hard time deciding whether the cable nipples were originally zinc plated or whether they are a low grade stainless. Some are as new, others have a tough layer of corrosion on them. It may of course be dependent on year, mine being a 1963.
Masking and painting around sounds like a reasonable idea! I always go overboard (ask Enigmas), and so have stripped all the internal moveable flaps and grit blasted the cases inside and out.
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