Vari-Cool™ Fan Belt—13.5 L Final Tier 4 or Stage IV Engine

1. When engine is stopped, fan drive oil pressure is released and oil flows back to the reservoir.

   Disconnect negative (-) battery cable.

2. Raise hood.

3. 
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   Remove cap screws (A) and left-hand side panel (B).

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4. 
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   Hold front sheave (C) and remove eight cap screws (D).

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5. Remove front sheave evenly off shaft.

6. 
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   Belt (E) and inner sheave (F) should stay on shaft. Remove six cap screws and nuts (H) and carefully position fan (G) against radiator.

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7. Remove belt through opening between fan and hub.

8. Discard old belt.

9. Install new fan belt between fan and hub so that it is positioned between lower sheave halves.

10. Slide fan into place, install cap screws and nuts and tighten to specification.

    Fan-to-Drive Assembly
    Nut	Torque	35 N·m (26 lb·ft)

11. 
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    Pull belt (I) onto drive shaft (J) and against rear sheave.

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12. When installing front sheave, make sure that belt remains loose and is not pinched between sheaves.

    Clean mating surfaces of front sheave and shaft.

    Install front sheave (K).

13. Hold front drive sheave and tighten six cap screws (L) to specification.

    Drive Sheave-to-Drive
    Cap Screw	Torque	37 N·m (27 lb·ft)

14. Reinstall diverter panel and cap screws. Tighten to specification.

    Diverter Panel Cap Screws
    Cap Screw	Torque	21 N·m (15 lb·ft)

15. Starting engine with belt loose between sheaves allows belt to climb out of groove between sheaves. Belt will correctly position itself within a few seconds after engine is started.

    Start engine and run at idle for 15 seconds. Turn off engine.

16. Keep hands away from exposed fan blades. Blades have sharp edges which may result in personal injury.

    Remove right-hand side front shield and make sure that belt is correctly positioned between sheaves.

17. Reinstall side panel and tighten cap screws.