aribert
Cast Iron
- Joined
- Jul 2, 2008
- Location
- Metro Detroit, MI
I always presumed that both oil cups on the side of a J-head were oil loss.
Recently I read in some head repair web page that one fills the upper oil cup until the bull gear cavity is full. On dismantling a couple of heads to access the bull gear asm I see a pair of Fafnir 208k bearings (unsealed). Should the lower bearing have an oil seal on the bottom surface or is this an oil loss system like the spindle bearings?
Related question - somewhere on some metalworking forum I seem to remember a discussion about partially filling the bull gear cavity with grease. Your thoughts?
Recently I read in some head repair web page that one fills the upper oil cup until the bull gear cavity is full. On dismantling a couple of heads to access the bull gear asm I see a pair of Fafnir 208k bearings (unsealed). Should the lower bearing have an oil seal on the bottom surface or is this an oil loss system like the spindle bearings?
Related question - somewhere on some metalworking forum I seem to remember a discussion about partially filling the bull gear cavity with grease. Your thoughts?