Yanmar 3YM30 Sevice Manual page 98

4. Disassembly and reassembly
(15)Removing the fuel injection nozzles
Loosen the fuel nozzles and remove them from the
cylinder head.
(16)Remove the fuel injection pump
1) Loosen the drive gear nut for fuel pump drive gear, and pull out the fuel pump drive gear /flange
assembly with an extraction tool.
Note:
Don't disassemble the pump flange and the pump drive gear.
2) Loosen the three (3) nuts for the fuel pump and remove the fuel injection pump and O-ring from the
gear case.
Fuel injection pump
Pump flange
Don't disassemble!
Fuel pump drive gear
Pump flange bolt
Fuel injection nozzle
Gear case cover
Pump flange bolt
Drive gear nut
83
Cylinder head