Morning gentlemen:
SUCCESS IS SOOOO SWEET!!!!
Took your advice RoyBoy, and with a little "gentle persuasion" from a hammer on the end of the phillips head screwdriver, with the locating screw partially removed, the little sucker let go. Worked a treat on the other truck that has the pick-up rollers mounted to it.
Old grease (what little there was of it - right again Rob) thoroughly removed, and the gearbox is now packed with "Red N Tacky"
Mission accomplished!!!!
Thank you RoyBoy and Rob for your insight, and to instill courage in me to get the motor free of the truck using "brute force". I have included a couple of photos of the "delicate" operation for your viewing pleasure.
Peter.....now in a flooded South East Queensland, Australia