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1. Remove the cutting blade and cup wheel from the Petrothin (Fig. 7).

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Figure 7

1. 1. Insert the holding rod into the hole on the inmost collar (Fig. 7).
   2. Use a 1 ½ in. wrench to take off the nut, take note of which way it is facing. The side with the raised edge should be facing the inside of the PetroThin (Fig. 7 and 8).
   3. Remove the first collar and take note of which way it is facing. The side with the raised outer edge should be facing the inside of the PetroThin (Fig. 7 and 8).

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