Apply Alignment Marks To Belt Pulley Of Crankshaft - AR05.10-P-7806-01MNA

Engine 176, 177, 178 

Engine 176, 177 

15.06.2022

Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench. Otherwise, damage to the engine or even failure of the engine may occur.

Operation steps 1, 4, 5, 6.

Fig 1: Identifying Ring Wrench (177 589 00 03 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Drift (177 589 00 15 00)

Courtesy of MERCEDES-BENZ USA

1. Turn crankshaft in direction of engine rotation and mark bore (30) of the belt pulley (6) with a drift.

   Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench.

   Otherwise, damage to the engine or even failure of the engine may occur.

   Never turn crankshaft against direction of engine rotation.

   Engine damage can occur otherwise.

   Ensure that the drift is inserted in the bore of the crankcase.

2. On stay (1) of the belt pulley (6) attach opposite the bore (30) marking and mark with number 1.

   This position represents 40° KW after ignition TDC of cylinder 1.

3. Pull drift out of bore (30) of belt pulley (6).
4. Turn the crankshaft at the belt pulley (6) in direction of engine rotation at stay (4) , apply a marking and mark with the number 4.

   Courtesy of MERCEDES-BENZ USA

   Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench.

   Otherwise, damage to the engine or even failure of the engine may occur.

   Never turn crankshaft against direction of engine rotation.

   Engine damage can occur otherwise.

   This position represents 53° KW after ignition TDC of cylinder 1.

5. Turn the crankshaft at the belt pulley (6) in direction of engine rotation at stay (2) apply a marking and mark with the number 2.

   Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench.

   Otherwise, damage to the engine or even failure of the engine may occur.

   Never turn crankshaft against direction of engine rotation.

   Engine damage can occur otherwise.

   This position represents 90c KW after ignition TDC of cylinder 1.

6. Turn the crankshaft at the belt pulley (6) in direction of engine rotation at stay (3) , apply a marking when viewed from above on the right parallel to the stay (3) and mark with the number 3.

   Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench.

   Otherwise, damage to the engine or even failure of the engine may occur.

   Never turn crankshaft against direction of engine rotation.

   Engine damage can occur otherwise.

   This position represents 235° KW after ignition TDC of cylinder 1.