Component Description For The Electromagnetic Viscous Coupling - Mercedes-Benz OM 471 Introduction Into Service Manual

System components
GF20.40>W>2002H
MODEL 963, 964
Location
1 Fan wheel
2 Electromagnetic viscous coupling
The electromagnetic viscous coupling (2) is
located between the fan wheel (1) and the
engine.
Task
The electromagnetic viscous coupling (2) regulates the fan wheel
(1) speed on a need basis when requested to do so by the engine
management (MCM) control unit (A4). The actuation that is
dependent on the engine operating condition, as well as external
factors such as, e.g. the charge air temperature, reduces fuel
consumption.
Design
Sectional view
3 Return hole
4 Valve lever
5 Storage room
6 Cover
7 Clutch plate
8 Gasket
9 Oil feed bore
10 Housing
11 Sensor ring
12 Flange shaft
13 Bearing
14 Main bearing
15 Electrical line (with hose as a torque support)
Y616 Fan clutch solenoid valve
Y616b1 Fan rpm sensor
174

Component description for the electromagnetic viscous coupling

– This printout will not be recorded by the update service. Status: 09 / 2011 –
20.7.11
W20.40>1154>06
W20.40>1155>81