I was doing some bearing maintenance on my B74.2 and found the 5 x 10 x 4 mm bearings in the steering block (#92171, common for the B74 series) to feel gritty and indexed.
I pulled the bearing and gave it a clean and lube, the spinning seemed fine so I pressed it back in. The gritty feel was gone but the bearing felt indexed again. Pulled it out, thinking I would replace it with a new one, but once removed, the bearing felt fine again.
Suspecting that the recess in the steering block for the bearing is oval, I took out my calipers and measured the diameters to be 9.94 mm minor and 10.1 mm major. That’s a 0.16 mm difference, not acceptable at all with this bearing size.
I bought a new pair of steering blocks but they are the same. Both the left and right side are affected.
This seems like a poor moulding job, just like with the front arms which must be reamed to eliminate binding on the hinge pin.
I don’t have a 10 mm reamer on hand so I’m looking for alternative ways to fix this. Has anyone else noticed this and managed to solve the problem?
I pulled the bearing and gave it a clean and lube, the spinning seemed fine so I pressed it back in. The gritty feel was gone but the bearing felt indexed again. Pulled it out, thinking I would replace it with a new one, but once removed, the bearing felt fine again.
Suspecting that the recess in the steering block for the bearing is oval, I took out my calipers and measured the diameters to be 9.94 mm minor and 10.1 mm major. That’s a 0.16 mm difference, not acceptable at all with this bearing size.
I bought a new pair of steering blocks but they are the same. Both the left and right side are affected.
This seems like a poor moulding job, just like with the front arms which must be reamed to eliminate binding on the hinge pin.
I don’t have a 10 mm reamer on hand so I’m looking for alternative ways to fix this. Has anyone else noticed this and managed to solve the problem?