[JM 35 Sedan]

Some are locked very tightly in the block by years and years of crud build up. What I would suggest first is applying lots of penetrating oil where the pump enters the block and maybe also some on the pump shaft from inside the pump/idler gear/cam gear chamber. After letting this soak for a day or two, put a wrench on the pump body and 'carefully' turn the pump back and forth, cw and ccw. When it begins to feel like it's moving more freely, begin pulling up as you turn in one direction and it should thread itself up and out of the block. This has worked for me in the past on some op's that were really locked tight in the block.