Figure 48. FUEL PUMP MOUNTING.
64. Fuel Pump Adjustments
Refer to Fig. 50 and adjust the fuel pump.
CAUTION: THIS IS A TWO STAGE PUMP AND MUST HAVE A RETURN LINE BACK TO FUEL SUPPLY TANK.
Step 1. Remove the valve cover screw to expose the pressure adjusting screw.
Step 2. Remove the fuel oil pressure gauge, Fig. 67, Item 1
Step 3. Install a test gauge with a range of 0 to 400 psi in the test gauge port.
Step 4. Start the hot oil heater (Para. 13).
Step 5. Using the pressure adjusting screw set pressure to 300 psi. To adjust pressure, use 118" Allen wrench to turn
pressure adjusting screw.
Step 6. Stop the hot oil heater (Para. 13).
Step 7. Remove the test gauge and install the fuel pressure gauge and the valve cover screw.