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

Chapter 4 N39453
Page 78
How to check the drive belt - 4.4GM rad, 4.4TGM rad, 4.4TWGM rad & 4.4TW2GM rad
Press down the belts with the thumb at the centre of the longest free length and check the deection (XX). With
moderate thumb pressure - 45N (10 lbf) 4,5 kgf - the correct deection of the belts is 10 mm (3/8 in).
How to adjust the belt tension
Caution: The alternator is driven by a pair of drive belts of a specic design. Use only Perkins POWERPART
drive belts. If this is not done, an early failure of the belts may occur.
1. Loosen the pivot fastener (XX1) of the alternator and loosen the setscrews (XX2) and (XX3) 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 new belts are tted, the belt tension must
be checked again after the rst 25 hours of operation.