As>built configurations
GF13.21>W>0800H
Belt drive, as>built configuration
2.8.11
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.
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.
W13.21
>
1015
>
76
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
* if no A/C compressor is installed: backup
belt pulley
A
Poly>V belt (basic belt drive)
B
Poly>V belt (fan drive)
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.
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.
32
– This printout will not be recorded by the update service. Status: 09 / 2011 –
