Belt Drive, As>Built Configuration; 2>Belt Drive (Fan Raised) - Mercedes-Benz OM 471 Introduction Into Service Manual

As>built configurations
GF13.21>W>0800H
ENGINES 471.9 in MODEL 963, 964
General information
There are two different belt variants for belt drive of engine OM
471:
f Engine 471.9 with 2>belt drive (fan raised)
f Engine 471.9 with 3>belt drive (fan on the crankshaft)
The version as a 2 or 3 belt drive variant is dependent on a number
of factors including the size of the radiator unit, the positioning
height and the installed fan variants.
2>belt drive (fan raised)
1 Belt pulley (on vibration damper)
2 Tensioner pulley for poly>V belt (A)
(on the tandem clamping device)
3 Belt pulley (alternator)
4 Belt pulley (A/C compressor)*
5 Pulley
6 Belt pulley (coolant pump)
7 Pulley
8 Pulley
9 Guide pulley (on the tandem clamping
device)
10 Tensioner pulley for poly>V belt (B) (on
the tandem clamping device)
13 Belt pulley (fan drive)
15 Fan clutch
16 Tandem clamping device
For a 2>belt drive the fan clutch is located on the guide pulley (8)
which is in turn located on a bracket above the crankshaft axis. In
this case one speaks about a raised fan.
The poly>V belt (A) drives the A/C compressor, the coolant pump
and the alternator.
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Belt drive, as>built configuration
A Poly>V belt (basic belt drive)
B Poly>V belt (fan drive)
– This printout will not be recorded by the update service. Status: 09 / 2011 –
There is a double>clamping device for both variants, the so>called
tandem clamping device, used over which the basic belt drive
poly>V belt and the poly>V belt is tensioned by the fan drive.
* if no A/C compressor is installed: backup
belt pulley
The poly>V belt (B) serves as the drive for the fan. For a rigid fan
clutch the gear ratio of the crankcase speed and fan speed i = 1.2.
2.8.11
W13.21>1015>76