Fuel Tank-To-Pump System
Diesel fuel is drawn from fuel tank by an engine mounted electric (V6) or mechanical (V8) fuel supply pump. Electric pump receives battery current when ignition switch is in "RUN" or "START" positions. Delivery pressure to fuel injection pump is 5.8-8.7 psi (.40-.62 kg/cm2 ). Maximum operating current is 3 amps. Mechanical pump is driven by an eccentric cam mounted on crankshaft and delivers about 5.5-6.5 psi (.39-.46 kg/cm2 ) to fuel injection pump.
A small screen type filter is located in fuel tank at the fuel pick-up. A larger sealed 11-12 micron fuel filter is located on rear of engine between fuel supply pump and fuel injection pump. Diesel fuel arrives at center inlet fitting on injection pump after leaving filter. A fuel return line is provided to return any excess fuel to tank.