Im new at this gas pump restoring and I dont know if all you guys know about this stuff called "Kroil".This stuff is amazing it has unstuck nuts and bolts that have rusted into one piece on my Tokheim 620 that has layed in a field for 50 years.I heard about from some older guys that restored old tractors.Its produced by a company called "Kano Laboratories" I found it on the internet.A gallon of this stuff costs $20 and is well worth it.Just thought I would pass this along.