Fuel Pump: Service and Repair

FUEL SENDER ASSEMBLY REPLACEMENT

TOOLS REQUIRED
J 45722 Fuel Tank Sending Unit Wrench

REMOVAL PROCEDURE




1. Remove the fuel tank.
2. Remove the fuel feed (1) and EVAP (2) lines from the fuel sender assembly.




3. Use the J 45722 and a long breaker-bar in order to unlock the fuel sender lock ring. Turn the fuel sender lock ring in a counterclockwise direction.

NOTE:
- Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.
- Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

IMPORTANT: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.




4. Remove the fuel sender assembly (2) and seal (3). Discard the seal.
5. Clean the fuel sender sealing surfaces (4).

CAUTION: Refer to Fuel Storage Caution in Service Precautions.




6. Place the lock ring on a flat surface. Measure the clearance between to lock ring and the flat surface using a feeler gage at 7 points.

IMPORTANT:
- Some lock ring were manufactured with DO NOT REUSE stamped into them. These lock rings may be reused if they are not damaged or warped.
- Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
- Check the lock ring for flatness.

7. If the warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
8. If the warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

INSTALLATION PROCEDURE




1. Install a NEW seal (3) onto the fuel tank.

IMPORTANT: Never reuse the old seal or a fuel leak may occur. Always use a NEW seal.

2. Install the fuel sender assembly (2).

IMPORTANT: Place the fuel pump strainer in a horizontal position when you install the fuel sender in the tank. When installing the fuel sender assembly, assure that the fuel pump strainer does not block full travel of the float arm.




3. Use the J 45722 in order to install the fuel sender lock ring. Turn the fuel sender lock ring in a clockwise direction.

IMPORTANT: Always replace the fuel sender seal when installing the fuel sender assembly. Replace the lock ring if necessary. Do not apply any type of lubrication in the seal groove.

Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.




4. Install the fuel feed (1) and EVAP (2) lines to the sender assembly.
5. Install the fuel tank.