YamTech,
Coleman makes
all the necessary replacement parts (pump diaphragms, generators - that pipe between the tank and burners, etc.). They are super-simple. The burners themselves, are stacks of alternating smooth and wavy rings. By removing the big (slotted) screw holding th burners together, you wouldn't believe the years of crud you can wire brush out of those burner elements, thus restoring full power to the stove. Speaking of full power, you can use methods, previously outlined to restore the rubber parts of the pump assembly (the bore could probably use a good cleaning), or just replace it. As I recall, it's a cheap part, and
everybody's got them. Wally-World, sporting goods stores, the e-web, all over the place. I just cleaned up a propane version I've had for probably 30 years. It looks like I took it off the shelf yesterday. I have one like yours, someplace out in the garden shed. That one's gotta be at least 50 years old. And somewhere out there is a catalytic heater somebody gave me, 'cuz they couldn't get it to work. I'll either have it purring, or send it into a low earth orbit.....
Good luck with your project!
Tebo
P.S. Your model (really old) only burns white gas ("Coleman" fuel - available at sporting goods stores. Don't try to put any other kind of fuel in it or you will go "boom".)