fryedaze
Guru
- Joined
- Sep 4, 2011
- Messages
- 1,722
- Location
- USA
- Vessel Name
- Fryedaze
- Vessel Make
- MC 42 (Overseas Co) Monk 42
In search of ideas to solve my belt slip problem. I have a 120/150 amp alternator on both my 1989 Cummins 6BT5.9Ms. This is a recent upgrade from the old 55 amp alts. The problem is the belts are slipping when the alts load up. I have checked the alt, water pump and tensioner for free movement. The belt in the picture is the first belt I put on that slipped. I bought another belt that didnt have the segments in the grooves and it did the same thing. I can see the slipping in the tach response. My research says that the serpentine belt I have should easily handle 120 amp load on the alt. Looking for a little old TF help.