![]() ![]() Disconnect fuel return line and fuel supply line.IMPORTANT: ALWAYS use a backup wrench when loosening or tightening fuel lines at injection pump so that discharge fittings are not altered to prevent possible internal pump damage. Disconnect all high pressure injection lines.Tag electrical wires for correct reassembly. Disconnect cold start switch, if equipped. ![]() Disconnect electrical connection to shut-off solenoid or throttle positioning solenoid, if equipped.Disconnect shut-off cable and speed control linkage, if equipped.To do so may cause seizure of the injection pump. IMPORTANT: Never steam clean or pour cold water on an Injection pump while the pump is running or while it is warm. PDF: Stanadyne DB2 and DB4 retained drive shaft removal and install RemovalĪll Stanadyne DB4 and most DB2 injection pumps will have a retained drive shaft (shaft stays in the pump when pump is removed from engine).Ĭlean the exterior of the injection pump and mounting surfaces. Stanadyne DB2 and DB4 Pump Removal and Installation
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