Fuel Pump: Service and Repair

REMOVAL

1. Loosen the threaded connections (use of a flare nut wrench preferred) and tighten snugly. Do not remove lines at this time.
2. Loosen mounting bolts one to two turns. Apply force with hand to loosen fuel pump if gasket is stuck. Rotate engine, by "nudging" starter, until fuel pump cam lobe is at low position. At this position, spring tension against fuel pump bolts will be greatly reduced.
3. Disconnect fuel supply pump inlet, outlet, and fuel return line.
WARNING: Spilled fuel is combustible.
4. Remove fuel pump attaching bolts. Remove pump and gasket. Discard the old gasket.




INSTALLATION

NOTE: Refer to SPECIFICATIONS for torque values.

1. If installing original pump, remove all fuel pump gasket material from engine and from fuel supply pump.
2. Install attaching bolts into fuel supply pump and install a new gasket onto bolts. Position fuel supply pump to mounting pad. Turn attaching bolts alternately and evenly.
NOTE: Cam must be at low position before attempting to install fuel supply pump. If it is difficult to start the mounting bolts due to spring action of the fuel pump, turn crankshaft by hand 360 degrees to relocate camshaft lobe. Then, proceed with fuel supply pump installation. Install with lever on bottom side of cam.
3. Install the fuel outlet line. Start fitting by hand to avoid cross threading.
4. Install the inlet line and tighten hose clamp.
5. Start engine and observe all connections for fuel leaks for two minutes.
6. Stop engine and check all fuel supply pump fuel line connections. Check for oil leaks at pump mounting pad.