Primary and Secondary Fuel Filter Element—Replacing (Tier 2/Stage II) (S680 and S690)

  1. CAUTION:

    TS1343
    TS1343-UN-18MAR92

    H95426
    H95426-UN-19FEB10

    A - Primary Fuel Filter

    B - Drain Valve

    C - Separator Bowl

    D - Secondary Fuel Filter

    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 makes 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 a diagnostic trouble code appears. Reset code after replacing filters.

    Start engine and run three—five minutes at low idle if machine had not been previously operating.


  2. Shut OFF engine and close valve at bottom of fuel tank.

  3. Thoroughly clean exterior of filter elements and filter mounting areas.

  4. 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.

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

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

  6. NOTE: Additional fuel will drain from filter housings.

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

  7. IMPORTANT: Do NOT prefill either fuel filter with fuel.

    NOTE: Lube filter seals with diesel fuel before installing.

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

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

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

  10. Verify that drain valve (B) is closed.

  11. Open valve at bottom of fuel tank.

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

  13. Start engine and run three—five minutes at low idle.

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