Steering Head Bearings

Each steering head bearing consists of two pieces, the bearing outer race, and the roller bearing with inner race. The outer races are pressed into the steering head cups in the frame head. The lower roller bearing is assembled over the fork stem and the upper roller bearing is held in place on the fork stem by the bearing lock nut on the upper threaded end of the fork stem.

After fork is removed inspect bearings and races for pitting, roughness or wear. Roughness of the roller bearings can be determined by rolling the bearings on the bearing races by hand. If bearings or races require replacement it is best to replace them in sets.

To replace bearing race, knock head cup from steering head using a suitable drift. Press new bearing race in new head cup and then press assembly into frame head. If you wish to use old head cups, holes must be drilled in back side of cup so that race can be driven out by using small diameter drift or by some other improvised means.

NOTE: Two types of bearings and races and head cups are in use. These parts are not interchangeable. 1960 and later bearing has 19 rollers and must be used with bearing race which is 27/64 high - 1.980 O.D. 1960 and later head cup must be used with this bearing race for proper press fit.

1959 and earlier bearing has 16 rollers and must be used with bearing race which is 3/8 high - 1.969 O.D. 1959 and earlier head cup must be used with this bearing race for proper press fit.

0 0

Post a comment