Harmonic Balancer - Crankshaft Pulley: Service and Repair

CRANKSHAFT PULLEY

REMOVAL AND INSTALLATION

Pre-removal & Post-installation operation:

Removal Steps 1-4:

Required Special Tools:
^ MB990767: Front Hub and Flange End Yoke Holder
^ MD998719:Pin

REMOVAL SERVICE POINTS

[[A]] DRIVE BELT REMOVAL
To introduce the serpentine drive system with the drive belt auto-tensioner, the following operations will be required.

CAUTION
To reuse the Drive belt, draw an arrow indicating the rotating direction on the back of the belt using chalk to install the same direction.








1. Rotate the pulley bolt of the auto-tensioner counterclockwise with an offset wrench [45°, a long offset wrench (5/8 x 11 /16 inches) recommended] and insert the hexagon wrench into the auto-tensioner hole to fix the auto-tensioner.
2. Remove the drive belt.

[[B]] CRANKSHAFT PULLEY CENTER BOLT/CRANKSHAFT PULLEY WASHER/CRANKSHAFT PULLEY REMOVAL





1. Hold the crankshaft drive sprocket with special tools MB990767 and MD998719.
2. Loosen the crankshaft pulley center bolt and remove the crankshaft pulley washer and crankshaft pulley.

INSTALLATION SERVICE POINT

]]A[[ CRANKSHAFT PULLEY/CRANKSHAFT PULLEY WASHER/CRANKSHAFT PULLEY CENTER BOLT INSTALLATION





1. Wipe off the dirt on the crankshaft and the crankshaft pulley as shown in the figure using a rag.
2. Wipe off the dirt on the crankshaft sprocket, the crankshaft and the crankshaft pulley as shown in the figure using a rag, and then degrease them.

NOTE: Degrease them to prevent drop in the friction coefficient of the pressed area, which is caused by oil adhesion.

3. Install the crankshaft pulley.
4. Wipe off the dirt on the crankshaft pulley washer and the crankshaft pulley center bolt as shown in the figure using a rag.
5. Apply an adequate and minimum amount of engine oil to the threads of the crankshaft pulley center bolt and the lower area of the flange.





6. Hold the crankshaft pulley with special tools MB990767 and MD998719 in the same manner as removal.
7. Tighten the crankshaft pulley center bolt to the specified torque.

Tightening torque: 210 Nm (155 ft-lb)