Fan Idler Pulley - Rebuild (8-06) Section 8 - Cooling System - Group 08 M11 Page 8-38 Install the rear bearing (1) into the mounting flange end of the pulley. The rear bearing must be seated in the rear bearing race. Install the idler pulley in an arbor press with the mounting flange facing up. Caution: Do not lubricate the seal. The oil seal must be installed with the lip of the seal clean and dry to provide a proper oil sealing surface and prevent future idler pul- ley damage. Install the seal into the pulley bore with the lip of the seal facing down. Use the bearing driver, Part No.
3375696, to press the oil seal into the pulley bore to the specified depth from the mounting flange surface. Oil Seal Installed Depth mm in 0.00 MIN 0.000 0.25 MAX 0.010 Caution: Do not allow the dust lip on the seal to roll under when installing the idler pulley shaft. The dust seal must be correctly installed to prevent contamination and future idler pulley failure. Install the idler pulley shaft (1) into the bore of the pulley with the large end of the shaft seated in the mounting flange.