LR3/Disco 3
A single six-ribbed belt drives all the primary engine mounted accessories and a secondary single eight-ribbed belt drives
the engine driven cooling fan.
Both the primary and secondary belts are crankshaft driven via the torsional vibration damper. An automatic tensioner,
located on the LH accessory-mounting bracket, keeps the belt at the correct tension. A deflection pulley on the RH
accessory-mounting bracket increases the wrap angle around the generator pulley.
The torsional vibration damper incorporates compressed rubber between its inner and outer diameters to absorb vibration
and shock loads.
The automatic tensioner consists of a deflection pulley on the end of a spring loaded pivot arm. The pivot arm can be
turned counter-clockwise (viewed from the front of the engine) for removal and installation of the belt. A belt wear indicator
is incorporated on the rear of the pivot arm.
5
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Crankshaft pulley
6
-
Generator
7
-
Deflection pulley
8
-
Primary accessory drive belt
9
-
Engine cooling fan pulley
10
-
Secondary accessory drive belt
11
-
Secondary tensioner assembly
