MF 135 Injector Pump Issues

Helping a friend try and get his running. Have fuel at small bleed screw on bottom of pump, but can't get any out of top bleed screw. Of course none at injectors. Any advice? TIA!
 
When did the engine last run? May have internal parts stuck from setting. Just repaired a JD pump today that had several parts stuck inside, had not run in over a year and had traces of water inside. The top bleed screw can be bled later, but if there's no fuel at the injectors then the metering valve and/or plungers may be stuck inside. Hopefully the head/rotor is not seized..
 
Most likely a stuck metering valve, or plungers. Very common. 25-30% of all the pump work I do is stuck pumps. Got to love our new fuel that is saving the planet. Al
 

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