Hi, I'm servicing a BSA Airsporter Mk1 for a friend. It wouldn't fire anymore, this was due to a problem with the tap.
Disassembly was pretty straight forward, except for the trigger block: it needed heating and quite a few blows from a synthetic hammer.
I'd like to ask for some advice on the piston seal please.
It is quite hard. I'm not sure what the criteria are for replacing it or re-oiling it. I have neatsfoot oil. Another question is how to get the leather seal off...
Many thanks! Louis
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