24-07-2021, 11:08 AM
Graham,
The cause is almost certainly the small friction spring below the "tabbed" dome. The Mk2 Ruby one is a little different to the one above. See attached photo. You will need to bend back the tabs (which may break) remove the dome, then clean it all up replace the broken spring, grease it up and replace in reverse order. If too many tabs have broken off, the dome can be drilled and bolted, say 4BA or 6BA or similar.
The small springs are unobtainable, as far as I know. But a Morris1000 one or possibly mini or any number of 50s 60s 70s British cars have equivalent springs. I used Morris 1000. Picture of Morris and Austin 7 springs side by side. I bought a complete winder mechanism off ebay and canibalised it.
Ian
The cause is almost certainly the small friction spring below the "tabbed" dome. The Mk2 Ruby one is a little different to the one above. See attached photo. You will need to bend back the tabs (which may break) remove the dome, then clean it all up replace the broken spring, grease it up and replace in reverse order. If too many tabs have broken off, the dome can be drilled and bolted, say 4BA or 6BA or similar.
The small springs are unobtainable, as far as I know. But a Morris1000 one or possibly mini or any number of 50s 60s 70s British cars have equivalent springs. I used Morris 1000. Picture of Morris and Austin 7 springs side by side. I bought a complete winder mechanism off ebay and canibalised it.
Ian