Perkins 415GM - How to Check the Drive Belt - 4.4 GM, 4.4 TGM, 4.4 TWGM & 4.4 TW2 GM; How to Adjust the Belt Tension

N39453 Chapter 4
Page 77
How to check the drive belt - 4.4GM, 4.4TGM, 4.4TWGM & 4.4TW2GM
Press down the belt with the thumb at the centre of the longest free length and check the deection (R). With
moderate thumb pressure - 45N (10 lbf) 4,5 kgf - the correct deection of the belt is 10 mm (3/8 in).
How to adjust the belt tension
Caution: The alternator is driven by a drive belt of a specic design. Use only a Perkins POWERPART drive
belt. If this is not done, an early failure of the belt may occur.
1. Loosen the pivot fastener (WW1) of the alternator and loosen the setscrews (WW2) and (WW3) of the
adjustment link.
2. Change the position of the alternator to give the correct tension. Tighten the pivot fastener of the alternator
and the setscrews of the adjustment link.
3. Check the belt tension again to ensure that it is still correct. If a new belt is tted, the belt tension must be
checked again after the rst 25 hours of operation.