Ford 5000 bad fuel lift pump

Bad fuel lift pump. Not priming mechanically. Hand lever primes, but mechanical lever, inside of pump does not prime.

[@JosecandidoRosalesazuaje]

Buen eia maestro mi trator no prende se me ahoga de gasoil y la camara y el turbo que podra ser esa falla
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[@DannyStogsdill]

I’m not sure. Stuck valve maybe?