Who is ready for reasonable sized pics?
I looked over Bill'* M62 pics. The M90 looks to be more of a challenge.
The location of the holes on the M62 are evenly distributed away from the sidewall areas. Bill W'* pic
The M90 has one hole that is nearly part of that sidewall (Grease in holes)
An NPT tap is about 2 inches in length. The distance to the bottom of the SC is about 2 inches. The tap is hardly in the hole. It was a challenge. I will not say how I pulled it off because I can not suggest others follow the method.
The last challenge was not finding a NPT grease fitting at 1/8". I happened to notice that the standard grease gun hose thread size was 1/8" NPT
one thing was on my side.
Now for fun... 4 inch pipe to stick out enough.
Only in a couple threads