CHANGE IN STEERING SHAFT WORM ASSEMBLY AND BEARING

The diameter of the thrust shoulder on the steering gear worm has been increased .043 to .047 larger than the diameter of the old design. Dotted outline in Fig. 955 shows out- line of old design worm shoulder as compared with the new design.

Increasing the diameter of this part lessens wear on the thrust shoulder of the worm as it provides a larger thrust surface for the roller bearing.

To provide clearance for the increased diameter of the worm shoulder, the inside diameter of the roller retainer at large end of roller bearing has also been increased, the inside diameter of the new bearing is 1 37/64 inch. (See Fig. 955.)

The old steering gear worm bearing roller assembly A-3571-B has been obsoleted. If calls are received for this part after present stocks are exhausted supply the A-3571-C bearing. This bearing can be used with either the old or present design worms. The old bearing A-3571-B can be used only with the old style worm.

The old design steering shaft and worm assemblies with the smaller thrust shoulder have been obsoleted. When present stocks of these parts are exhausted supply the new shaft and worm assembly. The new shaft and worm assembly is supplied under the same symbol numbers as the old design parts, namely, A-3524-CR and A-3524-D.

If one of the new assemblies is to be in- stalled in a car that is equipped with an old style A-3571-B bearing it will be necessary to replace the “B” design bearing with the present design A-3571-

Scroll to Top
Scroll to Top