shouldn't be too much struggle - there's a lip on it that sits on the end of the mast jacket - weasel under that with a slot screwdriver or a stiff putty knife and tap it out - doesn't matter if you destroy the old one, the whole unit must be replaced [includes horn wire], see pictures here

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics