Primary and Secondary Fuel Filter-Replacing

causym 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.

NOTE: Do not clean fuel precleaner and change final fuel filter at the same time. Doing so will make it difficult to restart machine. Perform fuel precleaner cleaning procedure then run engine before changing primary and secondary fuel filter.

Change primary and secondary fuel filters if performance decline is noticed or if ECU 94.17 appears. Reset code after replacing filters.

1. Start engine and run 3 to 5 minutes at low idle if machine had not been previously operating.

2. Shut OFF engine and thoroughly clean exterior of filter elements and filter mounting areas.

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causym CAUTION: Fuel in filters may be under pressure. Do not remove filters without completing the following step.

NOTE: Use a catch pan when draining fuel and when removing fuel filters.

3. Drain fuel contaminates and relieve pressure from primary fuel filter (A) by opening drain valve (B).

4. Close drain valve and remove and retain separator bowl (C).

NOTE: Additional fuel will drain from filter housings.

5. Remove primary fuel filter and secondary fuel filter (D).

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A-Primary Fuel Filter
B-Drain Valve
C-Separator Bowl
D-Secondary Fuel Filter

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IMPORTANT: Do NOT prefill either fuel filter with fuel.

NOTE: Lube filter seals with diesel fuel before installing.

6. Install previously removed separator bowl (A) on replacement primary fuel filter (B).

7. Install primary fuel filter assembly on engine. Tighten filter assembly 3/4 of a turn after seal contacts filter housing.

8. Install replacement secondary fuel filter (C). Tighten filter 3/4 of a turn after seal contacts filter housing.

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

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

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A-Separator Bowl
B-Primary Fuel Filter
C-Secondary Fuel Filter

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