Jaylegger
Platinum Member
- Joined
- Oct 4, 2009
- Messages
- 713
- Tractor
- Massey Ferguson GC2600L
When you replace the shear bolt, try to work some grease into the tiny space between the spinning shaft and the now-stationary hub, or drill and tap a grease fitting into the hub.
My auger shear system is the older, hub/shaft shear style and my hub has a grease fitting on it, to prevent the grinding and galling that will occur when the shaft is still turning and the (dry) hub is stationary.
As long as the bolt is driving the two pieces at the same RPM, no grinding occurs. As soon as you shear, that changes.
That snap ring may be to keep the shaft and hub engaged and in position if the shear bolt is no longer doing that.
After looking at parts diagrams I don't think greasing the fan shaft is necessary. Each end of the fan is outfitted with an Olight bushing which appears to be a sintered oil impregnated bushing. The shaft would spin on these bushings if the case of shearing the pin.