CAV injector pump on 3000

"Retired" is right, the most common problem after long storage is a stuck fuel metering valve. Like he says, this is the fuel throttle valve; it's moved by the injection governor spring and weights; has a vey close tolerance (7 microns).
You might break it loose by moving the throttle control rapidly from fast to slow.
This might sound pretty crude but I've been able to break it loose by tapping the side of the injection pump with a small wrench (Throttle positon should be "fast"; it puts spring pressure on the metering valve to open it. You can lift the top cover of the injection pump a quarter inch without disconnecting linkage inside and stick a screwdrive inside to pop it loose. If you do get it running use some fuel conditioner in the diesel. Of course there are many other possibilities, one thing to check is that the return line off the top of the pump is not blocked. Excessive case pressure inside the injection pump will prevent the main pump plungers from retracting on their intake stroke and they won't pump any fuel. Be sure to thorougly clean the inlet screen assembly on the back of the vane transfer pump. Be careful to get all the pieces back right, this is also the transfer pump pressure regulating valve.

Hopes this helps in your quest for toys and marriage, I know it can be a thin line.