MBE 900 – Section 8.2 Drive Belts

Section 8.2
Drive Belts

Perform the following procedures for removal and installation of the drive belts and belt tensioner.‪

Section 8.2.1
Poly-V Belt Removal

Remove the poly-V belt as follows:‪

1. Place a T-handle and socket-wrench bit on the tensioning pulley bolt. See the insert in Figure "Poly-V Belt Removal" .
   

   1. Belt Tensioner with Tensioning Pulley‪	3. Poly-V Belt‪
   2. T-Handle with Socket-Wrench Bit‪

   Figure 1. Poly-V Belt Removal

2. Lift the T-handle (swivel the tensioning pulley clockwise) to remove the tension from the poly-V belt. Hold the tensioning pulley in this position for the next step.
3. Remove the poly-V belt from the alternator and coolant-pump pulleys. Be careful not to kink, stretch, or otherwise damage the belt.
4. Lower the T-handle to return the tensioning pulley to its original position. Remove the socket-wrench bit from the pulley bolt.
5. Inspect the poly-V belt for nicks, wear, or other damage. Replace the belt if necessary.
6. Inspect the following parts and replace any that are damaged or worn:
   • Vibration Damper
   • Alternator Pulley
   • Coolant-Pump Pulley
   • Belt Tensioner
   • Tensioning Pulley

Section 8.2.2
Poly-V Belt Installation

Install the poly-V belt as follows:‪

1. Fit the poly-V belt on the belt pulleys. Be careful not to kink, stretch, or otherwise damage the belt. Do not fit the belt onto the tensioning pulley yet.
2. Place the T-handle and socket-wrench bit on the tensioning pulley bolt. Swivel the tensioning pulley clockwise to overcome the spring tension.
3. With the belt in place, lower the T-handle to return the tensioning pulley to its original position, allowing the belt tensioner to automatically put the correct tension on the belt.
4. Remove the socket-wrench bit from the pulley bolt.
5. Check the poly-V belt to make sure it is in the correct position and properly aligned on the pulleys.

Section 8.2.3
Belt Tensioner Removal

Remove belt tensioner as follows:‪

1. Remove the poly-V belt from the alternator and coolant-pump pulleys. Refer to "8.2.1 Poly-V Belt Removal" .
2. Remove the hex head bolt and belt tensioner from the oil-filter housing. See Figure "Belt Tensioner Removal" .
   

   1. Belt Tensioner with Tensioning Pulley‪

   2. Oil-Filter Housing‪

   Figure 2. Belt Tensioner Removal

Section 8.2.4
Belt Tensioner Installation

Install the belt tensioner as follows:‪

1. Align the pins on the belt tensioner with the holes in the oil-filter housing.
2. Install the belt tensioner on the oil-filter housing and secure in place with the hex head bolt. Tighten the bolt 50 N·m (37 lb·ft).
3. Install the poly-V belt on the alternator and coolant-pump pulleys. Refer to "8.2.2 Poly-V Belt Installation" .