Jeep 4897754AB Fuel Pump Module Assembly

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For the mechanical pump, start by detaching the negative battery cable, and remove the fuel tank filler cap to relieve fuel pressure. Wrap shop towels around the fuel pump inlet hose and outlet line fitting to absorb any spilled fuel during removal. Detach the fuel inlet hose and outlet line fitting from the fuel pump, unscrew the fuel pump mounting bolts, and remove the fuel pump and gasket. Scrape away any old gasket material from the fuel pump and engine block sealing surfaces. For electric pumps, relieve the fuel system pressure, detach the cable from the negative battery terminal, raise the vehicle, and remove the fuel tank. Disconnect the fuel vent, supply, and return hoses from the fittings on the fuel pump/sending unit. Detach the fuel pump/sending unit electrical harness connector from the main harness. The fuel pump/sending unit assembly is inside the fuel tank and held in place by a lock ring mechanism. Unlock and remove the fuel pump/sending unit assembly carefully, making sure not to damage the fuel level float and sending unit. Inspect the gasket (O-ring) around the mouth of the lock ring mechanism and the inside of the tank, and clean if needed. Disassemble and reassemble the fuel pump for 1996 and earlier models, if necessary. Use a new O-ring on the fuel tank before installing the fuel pump module. Insert the fuel pump/sending unit assembly into the fuel tank, aligning the stopper if necessary, and tighten the lock ring securely. Finally, install the fuel tank.

The vacuum tests can be conducted using either the direct connection or indirect connection method, depending on the availability of a vacuum gauge and a T-fitting.