Sometime ago, prior to the steering worm change mentioned in the August Bulletin, a change was made in the steering gear worm bearing. The bearing was changed from a cylindrical 9 roller to a tapered 13 roller bearing. To correspond with the tapered bearing, it was necessary to change the angle of the worm at both the upper and lower ends, and also to change the angle of the bearing cup and the adjusting sleeve.
Measured from the center line, the old worm and shaft assembly, A-3524-CR, had an angle of 25° at both the upper and lower ends of the worm, whereas on the present worm, the angle is 15°. To correspond with these changes, it was necessary to change the angle of the bearing cup and the adjusting sleeve. Measured from the center line, the angle of the present bearing cup and sleeve is 20°, whereas on the old cup and sleeve it was 25°.
Due to the changes in angles, the old and the present design worms, bearing cups, ad- justing sleeves and bearings cannot be used interchangeably. If calls are received for an old design worm assembly having a 25° angle, it will be necessary to supply the new design worm bearing cup,. adjusting sleeve, and roller bearing assembly, as the old design worms were not held for repairs, due to the small service demand for this item.
The old style bearing cup A-3552-DR and the old style adjusting sleeve A-3553-CR and bearing A-3571-AR are held for repairs.
K. R. Wilson is making up tools for the removal and installation of bearing cup in steering gear housing.