Replacing Primary and Secondary Fuel Filter Elements

CAUTION:

High-pressure fluid remaining in fuel lines can cause serious injury. Only technicians familiar with this type of system should perform repairs. Before disconnecting fuel lines, sensors, or any other components between the high-pressure fuel pump and nozzles on engines with High Pressure Common Rail (HPCR) fuel system, wait a minimum of 15 minutes after engine is stopped.

1. Remove panel (A) and thoroughly clean exterior of filter elements and filter mounting areas.

A-Panel

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CAUTION: Fuel in filters may be under high pressure. Open valve (C) on bottom of filter to relieve pressure prior to removing filter.

NOTE: Use a catch pan when draining fuel and also when removing filters from the machine.

3. Drain water and contaminates from fuel filter (A) into a suitable container by opening drain valve (C) on bottom of filter.

4. Disconnect water in fuel (WIF) sensor connector (D) from primary fuel filter.

IMPORTANT: Always replace both filters at the same time.

NOTE: Additional fuel will drain from filter housings.

5. Remove fuel filters from machine using suitable filter wrench.

6. Remove WIF sensor from old primary filter. Inspect O-ring, replace as necessary, and install in new primary fuel filter. Tighten to specification.

Specification

A-Primary Fuel Filter
B-Secondary Fuel Filter
C-Drain Valve
D-WIF Sensor Connector
E-Fuel Shut-Off Valve

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IMPORTANT: Do NOT prefill fuel filters with fuel.

NOTE: Lube filter seals with diesel fuel before installing filters.

7. Install new secondary fuel filter (A) and primary fuel filter (B) on machine. Tighten 1/2 turn after seal contacts filter housing.

8. Connect sensor (C).

9. Open fuel shut-off valve.

10. Turn key switch to ON for 60 seconds to allow fuel pump to prime system.

11. Start engine and run 3 to 5 minutes at low idle.

A-Secondary Fuel Filter
B-Primary Fuel Filter
C-Sensor

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