Workshop Manual

EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE

39.1 DESCRIPTION AND OPERATION OF BELT DRIVE TENSIONER AND

RELATED PARTS

The engine uses two poly-V-belts. Since this type of belt is very ﬂexible, a number of m ajor

assemblies can be driven by one poly-V-belt. The alternator, refrigerant compressor, and coolant

pump are driven by one eight-ribbed poly-V-belt. The fan clutch and the engine fan are driven by

one ten-ribbed poly-V-belt.

The belt tensioners are ﬁrmly bolted onto the accessory bracket. The tensioning arms with

tensioner pulleys are turned counterclockwise by the force of the springs to provide the required

tension in the belts.

All information subject to change without notice.