LOW-PRESSURE FUEL DELIVERY PUMP The low-pressure fuel delivery pump is mounted on the backside of the gear case housing and is gear driven from the rear of the A-bank idler gear behind the high-pressure pump drive. The delivery pump is a gear type mechanical pump utilizing a drive gear with shaft and a driven gear in a two-piece housing (Fig. 26). Pressurized fuel is regulated by a pressure regulator valve and spring mounted in the pump cover (Fig. 25). The maximum pressure is regulated to 105-PSI output. The body and cover of the fuel pump contain support bearings for the drive and driven gears (Fig. 27). Fig. 25 WEEP HOLE PUMP DRIVE Fig.
27 Page 26 PUMP COVER SUPPORT BEARINGS E OR PRESSUR REGULAT VALVE E OR Fig DRIVEN GEAR DRIVE GEAR DRIVEN GEAR DRIVE GEAR