Bosch PFR Single-Cylinder Injection Pump Diagram

Section through a type PFR(roller tappet) single-cylinder injection pump 1, delivery valve holder; 2, delivery valve; 3, pump barrel; 4, pump plunger; 5, fuel control rod (rack); 6, rack control sleeve; 7, plunger control arm; 8, roller tapper.

2 Replies to “Bosch PFR Single-Cylinder Injection Pump Diagram”

  1. I have an RD7H Wacker with a Hatz 1D41S one-cylinder diesel installed. It has Bosch 0414266998 fuel injector pump installed. It didn’t run when I bought it, and after having the pump and injector rebuilt, it still does not run. The pump is NOT pushing any (or very minimal fuel to the injector. I was assured, by the last owner, that it ran about 6 years ago. He is unable to get it started as well as I. Of course, without fuel to the injector, it won’t start. Timing is one issue I am unable to resolve. Hatz says there should be a number on the injector pump, and this will help me (along with a number on the engine) set the shim/gasket combination for the timing. I am unable to see any numbers on the injector pump. Your assistance would be greatly appreciated!

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