Cactus Charlie
Well-known member
- Joined
- Mar 1, 2025
- Posts
- 554
- Type aircraft owned
- CCX-2000 (FX-3)
- Base airport
- KDVT
- Ratings
- Commercial ASEL, ASES, AMEL, glider. CFI glider, ASE, Instrument.
If you have a Carbon Cub with a Denso alternator take a close look and the crankcase mounted hinge attachment bracket next time the cowling is off.
I found that the alternator moved when I checked belt tension. I found free play between the alternator mount lug and the crankcase attach bracket. All slack should be eliminated from this attach point by proper section of shim washers but mine had not been correctly assembled and the alternator lug, shim washers, bolt, and the bracket had been fretting.
I took the alternator and crankcase mounting bracket home for closer inspection. I machined a spacer from 6061 bar stock to replace the ill fitting shim washers. Today I got it back on the aircraft and the alternator is now rigidly attached.
Photos later. I left my camera in the hangar.
I found that the alternator moved when I checked belt tension. I found free play between the alternator mount lug and the crankcase attach bracket. All slack should be eliminated from this attach point by proper section of shim washers but mine had not been correctly assembled and the alternator lug, shim washers, bolt, and the bracket had been fretting.
I took the alternator and crankcase mounting bracket home for closer inspection. I machined a spacer from 6061 bar stock to replace the ill fitting shim washers. Today I got it back on the aircraft and the alternator is now rigidly attached.
Photos later. I left my camera in the hangar.
