Farmall F-12 Fuel Pump

wowsk

Member
The F-12 finally broke loose after sitting for 50 years. Soaked it for 2 weeks and last night it finally started to turn. It was overhauled shortly before being parked and the sleeves and pistons look in good shape, no rust, etc. so I hopefully won't have to pull the head.

I took the fuel pump off to look a the diaphragm because I am guessing it will be hard as a rock after 50 years. I am having trouble getting the bottom and top halves of the pump to separate to get the the diaphragm. I removed the six screws on top. Does anyone have any ideas getting the top and bottom to separate? I don't want to break anything. Is there a step I am missing?

Thanks,
Noah
 
The diaphragm is bad so cut around the edge with a razor blade where the screws came from than install new diaphragm.
Also easy to start with small gravity feed fuel tank on hood the first time. than you can hook up fuel pump.
 

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