Re filling gun, first you twist large black knob at base of cylinder and pull on chain to take pressure off sprung plate before placing over filler plate in grease tub.
Check that the tub of grease has the disc with a hole in, not all makes do.
On my Wanner gun (purchased in 1973, chrome plating now worn through) I have swopped the nozzle over to the alternative position to make a straight rather than 90 degree gun.
