Tension poly-V-belt - AR13.22-P-3902-04T

Pin for locking poly-V-belt tensioning device

WF58.50-P-1325-02A

Hold front part (1) of tensioning device tight when removing the pin (2) in order to prevent the tensioning pulley (4) snapping back suddenly.

1. Pull pin (2) (tool to be shop-made) out of holes in front part (1) and housing (3) of tensioning device in order to be able to turn tensioning pulley (4) into its initial position.

   Shown on engine 646 

   Fig 1: Pulling Pin Out Of Holes In Front Part And Housing Of Tensioning Device

   Courtesy of MERCEDES-BENZ USA
2. Slowly turn front part (1) of tensioning device in clockwise direction (arrow) until the poly-V-belt is tensioned by the force of the spring.
   Fig 2: Turning Front Part Of Tensioning Device

   Courtesy of MERCEDES-BENZ USA