F 550 2WD Super Duty V10-6.8L (2009)
3. Using a new crankshaft pulley bolt, install the bolt and washer and tighten the bolt in 4 stages.
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Stage 1: Tighten to 90 Nm (66 lb-ft).
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Stage 2: Loosen 360 degrees.
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Stage 3: Tighten to 50 Nm (37 lb-ft).
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Stage 4: Tighten an additional 90 degrees.
4. Rotate the tensioner clockwise and install the accessory drive belt.
5. Press the position retaining tab and rotate the lower cooling fan shroud downward until the position retainer tab locks into position.