Bob328
Veteran Member
- Joined
- Dec 22, 2021
- Messages
- 33
- Vessel Name
- Breeze
- Vessel Make
- 97 Marine Trader 34/double cabin
I thought I'd share an interesting problem that came up on our Marine Trader 34DC. I kept hearing an increasing squeaking from the front of the Cummins 6BT. It sounded like bearing on the belt tensioner was bad. I replaced it and the squeak was still the same. Used stethoscope seemed it was from idler pulley. Replaced idler with no improvement! I had another mechanic verify. Decided to remove Balmar generator to have it tested. All good! Alternator shop owner that I've known many years recommended cleaning crank pulley with a steel brush. Still squealed, so he said try belt dressing! This was a serpentine belt with about 100 hours on it. Wouldn't you know the belt dressing cured it! It really sounded like bearing, not a squeal. After $600.00 and 3 days work we finally found success I have put 20 hrs run time since without any noise. Thought I'd share with the forum.
Two mechanics
Two mechanics
