Workshop Manual
39.1 DESCRIPTION AND OPERATION OF BELT DRIVE TENSIONER AND RELATED PARTS
There is a square hole in each tensioning arm to install a 1/2 in socket tool for removal and
installation of the poly-V-belts. The outer poly-V-belt must be removed before removing the
inner poly-V-belt.
1. Crankcase Damper 8. Accessory Mounting Bracket
2. Poly-V-Belt for the Fan 9. Belt Tensioner
3. Alternator
10. Fan Clutch
4. Pulley
11. Pulley and Spacer
5. Poly-V-Belt for Alte rnator, Refrigerant Compressor and Co olant Pump
12. Water Pump
6. Tensioner Pulley
13. Idler Pulley Bracket
7. Refrigerant Compressor
14. Idl er Pulley
All information subject to change without notice.
39-4 DDC-SVC-MAN-0081 201 0 Copyrig ht © 2010 DETROIT DIESEL CORPORATION










