Truck made a strange noise at start-up the other day.
Similar to a belt squeal, but definitely different
I checked the belt, (even though it is new)
There was a glob of something on the surface of the idler pully which I cleaned off but that didn't cure it.
I noticed a black gummy substance at the boundary of the inner and outer portions of the AC compressor pully, so:
I turned off the a/c and restarted then the noise went away even after I turned the a.c. back on.
Any ideas?
Edit:
The a.c. clutch functions / stops if I pull the clutch relay fuse.
Your clutch maybe working for now , but that black goop you found is the rubber/Plastic moulding around your armature for the clutch . Very common problem on ag / industrial equipment.
Get the numbers and make of your compressor and have it replaced. Hardest thing on ac clutch is not enough air flow thru the condenser, a lot of idling in hot weather will drive the high side pressure thru the roof.
