4. Adjustment of Fuel Injection Pump and Governor Adjust the fuel injection pump after you have completed reassembly. The pump itself must be readjusted with a special pump tester when you have replaced major parts such as the plunger assembly, roller guide assembly, fuel camshaft, etc. Procure a pump tester like the one illustrated below. 4.1. Preparations Prepare for adjustment of the fuel injection pump as follows: (1) Adjusting nozzle assembly and inspection of injection starting pressure. Mpa (kgf/cm 2) (2) Adjusting injection pipe . mm (3) Mount the fuel injection pump on the pump tester platform.
42 Adjusting nozzle type YDN-12SD12 Injection starting pressure 16.2 – 17.2(165 – 175) Inner dia./outer dia. × length Ф2.0/Ф6.0 × 600 Minimum bending radius 25