I just put a bit of oil down the pump shaft - to lubricate the leather plunger - and mine has worked for many years - probably since the mid 80'.

About every 15 years or so I buy one of those sparking lantern starters and try to install it on my Coleman fuel lantern ... and it doesn't fit. I've done that twice now. Maybe I've learned my lesson on that one.

Enjoy your fine lantern!