– Push piston with tensioning pulley „2“ into
housing „3“ and lock with the machine screw
(Figure 66).
67
– Place the Poly-V belt centrally on the fan
pulley and install the tensioning pulley and the
lower belt pulley.
68
– Retain the belt pulley with one machine
screw „1“ without pushing it fully on to the
centering hub.
69
– Insert a large screwdriver between the hydrau-
lic belt tensioner and the belt pulley and press
it down until the pulley slides on to the center-
ing hub.
– Insert and tighten the remaining machine
screws „1“.
Types of belt
Since the belt pulleys on the fan side differ in
diameter on various engine types and versions,
Poly-V belts of differing lengths are fitted.
Note:
In order to be sure of avoiding mistakes con-
cerning the length of Poly-V belts when ordering
them, it is best to measure the diameter of the
belt pulley at the fan end and refer to the above
table, using this figure as a starting point.
Type
and engine
version
Ident. No.
Belt
length
(mm)
Fan pulley
diameter
(mm)
2 L 41 C 50203100 920 72
All other types
and versions 501 415 00 910 64
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