Cariboo4x4
Member
This my first go at preloading a pinion in a case tractor. I installed new races and new bearings. As I am preloading to the max preload spec of 12 inch lbs the clearance between the 2nd and 3rd gears gets less and less. I can still turn 2nd gear back and forth on spline at 12 inch lbs of preload turning torque so
there is less than 0.0005 (1/2 a thou). The spec in the book is 0.001-0.006 thou. Based on my observations of clearance diminishing as I increase the preload; once new bearing and new races wear in there will be 0.001 or more of clearance. The service manual does not specify if the clearance is for worn bearings or new bearings. I can order a different size spacer to allow more clearance between 2nd and 3rd gear yet figured I'd get a seadoned opinion from someone here. My current spacer is 0.219" so I'd buy a 0.214" spacer.
there is less than 0.0005 (1/2 a thou). The spec in the book is 0.001-0.006 thou. Based on my observations of clearance diminishing as I increase the preload; once new bearing and new races wear in there will be 0.001 or more of clearance. The service manual does not specify if the clearance is for worn bearings or new bearings. I can order a different size spacer to allow more clearance between 2nd and 3rd gear yet figured I'd get a seadoned opinion from someone here. My current spacer is 0.219" so I'd buy a 0.214" spacer.