1942 - 1947 Chevrolet Shop Manual



	9-11

	Worn sector shaft bushings may be removed and replaced with special driver J-1614 on conventional models, and with J-1615 on Cab-Over-Engine models, Fig. 20. The bushings are machined to permit pressing them into the housing without reaming. Inspect the fit of the pilot on the end of the sector shaft in its bushing in the side cover. If this bushing is worn, a new side cover and bushing assembly should be installed as it is not practical to replace this bushing in the Service Department. Check the ball guides for any damage at the ends where they deflect or pick the balls from their helical path. Any damaged guides should be replaced. Reassembly of Ball Nut 1. Place the wormshaft flat on the bench and slip the nut over the worm with the ball guide holes UP, Fig. 21. Align the grooves in the worm and nut by sighting through the bottom of the ball guide holes.	few turns. The filling of the circuit can then be continued. It may be necessary to work the worm back and forth, holding the balls down first in one hole then the other, to close up the spaces between the balls and fill the circuit completely and solidly. 3. Lay one half of a guide, groove UP, on the bench and place the remaining balls from the count container in it, Fig. 22. The number of balls remaining should just fill the guide.


		Fig. 22-Filling Ball Guides 4. Close this half of the guide with the other half. Hold the two halves together and plug each open end with clear vaseline or heavy grease so the balls will drop out. 5. Push the guide into the guide holes of the nut as shown in Fig. 23. This completes one circuit of balls. If the guide does not push all the way down easily, tap it lightly into place with the wooden handle of a screw driver.

	Fig. 21—Filling Ball Circuits In Nut 2. Count 30 balls (53 on C.O.E. models) into a suitable container. This is the proper number of balls for one circuit. Drop the counted balls from the container into one of the guide holes while turning the worm gradually away from that hole. Continue until the ball circuit is full from the bottom of one guide hole to the bottom of the other—or until stopped by reaching the end of the worm. NOTE—In cases where the balls are stopped by the end of the worm, hold down those balls already dropped into the nut with the blunt end of a clean rod or punch, Fig. 21. and turn the worm in the reverse direction a
		Fig. 23—Removing or Replacing Ball Guides