Harmonic Balancer - Crankshaft Pulley: Service and Repair
REMOVAL AND INSTALLATION
- MB992278: Belt Tension Release Wrench
- MB990767: Front Hub and Flange Yoke Holder
- MD998719: Pin
REMOVAL SERVICE POINTS
[[A]] RADIATOR CONDENSER TANK ASSEMBLY REMOVAL
Remove the radiator condenser tank assembly mounting bolt, and move the radiator condenser tank assembly to a place where it does not interfere with the drive belt removal and installation.
[[B]] DRIVE BELT REMOVAL
Since the serpentine drive system with the auto-tensioner is used, the following operations will be required.
1.
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.
WARNING:
Always work from above when releasing the tension of the auto-tensioner. When you try to gain access from underneath the vehicle, you will experience difficulty, thus causing the tool to be dropped off.
CAUTION:
To work at the optimum angle, you must choose a most suitable box-type wrench is applied to the special tool.
WARNING:
Be sure to set the box-type wrench and the special tool MB992278 to the hexagonal parts securely to prevent the tool from falling off because the tension of the auto-tensioner is high.
Install special tool MB992278 and a box-type wrench at the optimum angle.
2. Rotate the pulley bolt of the auto-tensioner counterclockwise.
3. Insert the L-shaped hexagon wrench into the auto-tensioner hole to fix the auto-tensioner.
4. Remove the drive belt.
[[C]] CRANKSHAFT PULLEY CENTER BOLT/CRANKSHAFT PULLEY WASHER/CRANKSHAFT PULLEY REMOVAL
1. Hold the crankshaft pulley with special tools MB990767 and MD998719.
2. Loosen the crankshaft pulley center bolt and remove the crankshaft pulley center bolt, crankshaft pulley washer and crankshaft pulley.
INSTALLATION SERVICE POINTS
]]A[[ CRANKSHAFT PULLEY/CRANKSHAFT PULLEY WASHER/CRANKSHAFT PULLEY CENTER BOLT INSTALLATION
1. Wipe off the dirt on the crankshaft and crankshaft pulley as shown in the figure using a rag.
2. Wipe off the dirt on the crankshaft sprocket, crankshaft and 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 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 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)
]]B[[ DRIVE BELT INSTALLATION
1.
CAUTION:
- To reuse the drive belt, install it by aligning the arrow mark on the backside of belt marked at the removal with the rotating direction.
- Check that the notches of the notched pulley and the notches of the drive belt are fit correctly.
- Check that the drive belt is installed in the center of the flat surface of the flat pulley.
Install the drive belt to each pulleys as shown in the figure.
2. WARNING:
Always work from above when releasing the tension of the auto-tensioner. When you try to gain access from underneath the vehicle, you will experience difficulty, thus causing the tool to be dropped off.
CAUTION:
To work at the optimum angle, you must choose a most suitable box-type wrench is applied to the special tool.
WARNING:
Be sure to set the box-type wrench and the special tool MB992278 to the hexagonal parts securely to prevent the tool from falling off because the tension of the auto-tensioner is high.
Install special tool MB992278 and a box-type wrench at the optimum angle.
3. Rotate the auto-tensioner counterclockwise and remove the L-shaped hexagon wrench fixing the auto-tensioner.
4. Apply tension to the drive belt while slowly turning the auto-tensioner clockwise.