charmalu,

U have a vacuum controlled Injection Pump (IP). I had a Perkins Diesel in a Fordson Major Diesel (built in England) Tractor engine that had that type of IP. There was no mechanical linkage to the IP.

Seems like my old 59 180D MD pushrod Diesel had that type of system too. It also had another flapper valve in the intake manifold that would close if the engine ran backward.

P E H