C9.3 Engines for Caterpillar Built Machines Fuel Priming Pump - Remove and Install Caterpillar

Removal Procedure

1. Turn the fuel supply to the OFF position and turn the power disconnect switch to the OFF.
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   Illustration 1	g02138690
   Typical Example

2. Disconnect the fuel line (1) to the ARD manifold from both ends.
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   Illustration 2	g02140391
   Typical Example

3. Disconnect the solenoid harness (2).
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   Illustration 3	g02139134

4. Remove the bolts (3) from the manifold.
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   Illustration 4	g02139144

5. Remove the manifold (4).
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   Illustration 5	g02138698

6. Remove the two locknuts (5).
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   Illustration 6	g02139150

7. Write down the polarity and remove the wires (6) from the terminal studs. The polarity is designated by “+” and “-” signs around the terminal studs.
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   Illustration 7	g02139164

8. Remove the seal (7).
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   Illustration 8	g02139169

9. Remove the pump assembly (8).
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   Illustration 9	g02167735

10. Remove the two backup rings (9), seal (10), and seal (11) from the pump assembly.

Installation Procedure

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Illustration 10	g02139275
Proper orientation of the new fuel priming pump.

1. Use the pump seal installer that is provided in the pump kit to press in the new pump (12) and seals.

   Note: The outlet of the pump should be at the top center position.

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   Illustration 11	g02139286

2. Reinstall the wires on the terminal studs. Install new locknuts (6). Torque locknuts to 1.3 N·m (1 lb ft).
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   Illustration 12	g02139307

3. Install new seal (7).
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   Illustration 13	g02139309

4. Reinstall the manifold (4).
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   Illustration 14	g02139311

5. Reinstall bolts (3). Torque the bolts to 12 ± 3 N·m (9 ± 2 lb ft).
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   Illustration 15	g02138801

6. Replace the filter connector fitting (13).
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   Illustration 16	g02139316

7. Reconnect the solenoid harness (2).

8. Turn the fuel supply to the ON position and turn the power disconnect switch to the ON.

9. Use two people in order to flush the fuel pump and fuel line (1) into a suitable container for disposal. The fuel pump can be activated by turning on the key or pressing the manual switch. The manual switch, if available, is located on the primary fuel filter base.

10. Connect fuel line (1) to the ARD manifold.

11. After reassembly, prime the engine by turning on the key or pressing the manual switch. The manual switch, if available, is located on the primary fuel filter base. Visually check for leaks around the pump and around the connections on the ARD manifold. If leaks are observed, resolve the leak issue before proceeding further.