Figure 146. Fan impeller and viscous coupling: 1 — mounting bolt; 2 — fan impeller; 3 — mounting bolt; 4 — viscous coupling
If the front of the engine is disassembled, removing and installing the fan drive clutch is not difficult. The viscous coupling is secured with an M10 bolt. When assembling, tighten it to a torque of 45 Nm. The fan and coupling are shown in the figure 146.
Figure 147. Coolant pump assembly with clutch: 1 - fan impeller; 2 — bolt (3 pcs.) M6x14; 3 — bolt, M10x40; 4 - ball bearing; 5 — viscous coupling; 6 - bolts; 7 — belt drive pulley; 8 — pump body
The design of the coolant pump and clutch is shown in the figure 147.
(Article was borrowed from the website: Mercedesman.ru)