2-48. FUEL PUMP ASSEMBLY (CONT).
Fuel Pump Assembly/
The rotary power-driven pump must be adjusted after
Prepare the water heater and the required equipment for the fuel pres-
reassembly is complete or whenever pressure is sus-
sure test using the following procedures:
pected to be in error. To adjust the pressure, the
rotary power-driven pump must be reinstalled in the
Step 1. Fabricate a test gage line (fig D-1). Attach adapter (1) and pres-
sure gage (2).
Step 2. Disconnect the fuel pump assembly nozzle pressure line at the
fuel pump 90 degree elbow (3). Connect and tighten the test line
and pressure gage to the fuel pump assembly at the 90 degree
elbow. Bend the test line and pressure gage so that it is visible
and accessible from the left side of the water heater.
Step 3. Unscrew and remove the end cap (4) nut from the rotary power-
Step 4. Pour one pint of motor oil into a five gallon gasoline can and fill
the rest of the can with combat automotive gasoline. The oil is
used to lubricate the pump.
Step 5. Remove the fuel hose assembly from the top cabinet door stor-
age area. Connect the fuel hose assembly to the water heater
and to the five gallon gasoline can. Uncoil the power cable in the
top cabinet storage area.
Step 6. Place the HEATER ON/PURGE ON switch to PURGE ON posi-
Step 7. Use the pump unit assembly for a power source.
Step 8. Connect the power cable to the pump unit.