Repair, welcome to the forum!
Been a long time since I pulled one of those...
I presume you've already removed the clutch/gear assy (#14 thru #17)?
Pry-out the seal #25, then (from the inside), push-out the worm gear.
Washer #23 and bushing #24 will come out with it.
O-ring #26 may not be there. (Age, previous work, ...etc)