1466 won't start?????

Last year my 1466 was getting hard to start when leaving it sit for long periods of time, talking two to three months. The end of last Nov. I tried to start it and could not get it to fire. Been sitting all winter and today tried to start it again. Had to hook another tractor to it and pull it, batteries getting weak. We pulled it a mile down the road and back. Pulled it fast enough the tach. was reading 1200 rpm. and oil psi was up to 70lb. Could not even get any smoke out of it. None. Thinking fuel problem. Checked filters, bleed filters, fuel tank full, checked if the hose from filter to pump bad, fuel pouring out at the pump, will run on ether. It's getting fuel. Throttle linkage works correct also. Tried pumping it up with the plunger pump also. Any one have any ideas?? Injector pump problems???
 
Sounds like the injection pump hydraulic head has a stuck/damaged plunger. Could also be the housing tappet guide has drifted up out of place which keeps the plunger from going down far enough to open the inlet ports.
 

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