1942 - 1947 Chevrolet Shop Manual



	9-12

	6. Fill the second ball circuit in the same manner as the first. 7. Assemble the ball guide clamp to the nut, being sure to use lock washers under the clamp screws and set the screws up TIGHT. Check the sssembly by rotating the nut on the worm to see that it moves freely. Do not rotate the nut to the end of the worm threads and thereby damage the ball guides. If there is any "'stickiness" in the motion of the nut, some slight damage to the ends of the ball guides may have been overlooked. Assembling Steering Gear 1. Lay the wormshaft and nut assembly flat on the bench to make sure that the nut does not run to the end of the worm. 2. Place the upper roller bearing over the wormshaft. Then thread the wormshaft into the housing. 3. Back the worm bearing thrust screw out of the lower end cover a few turns. Install the lower bearing. Assemble the end cover to the housing, using a new gasket. 4. Assemble the lash adjuster with shim in the slot in end of sector shaft. Check the end clearance which should not be greater than .002", Fig. 24. For the purpose of adjusting this	6. Rotate the wormshaft by hand until the ball nut is about in the center of travel. This is to make sure that the rack and sector will engage properly, with the center tooth of the sector entering the center tooth space of the nut. 7. Push the side cover assembly, including the sector shaft and side cover gasket, into place. After making sure there is some lash between the rack and sector teeth, assemble and tighten the side cover bolts. Adjustment of Steering Gear on Bench 1. Tighten the worm bearing thrust screw until all wormshaft end-play has been removed. Then tighten the lock nut. 2. Install the steering wheel on the wormshaft temporarily. Carefully turn the steering wheel all the way in one direction and then back about one turn. 3. Using a J-544 steering gear checking scale, at right angle to one spoke at wheel rim, measure the pull required to keep the wheel in motion. This should be between 1 and 1-1/2 pounds. If necessary, adjust the worm thrust screw until the proper pull is obtained. 4. Turn the steering wheel from one stop all the way to the other, counting the number of turns. Then turn the wheel back exactly half the number of turns to the center position and mark the wheel at the top or bottom with a piece of tape. 5. Turn the sector lash adjuster screw clockwise to remove all lash between rack and sector teeth. Tighten the lock nut. NOTE—Be sure adjustment is not changed while tightening the lock nut. 6. Using the J-544 steering gear checking scale, check the pull at the rim of the steering wheel. Take the highest reading on the scale as the wheel is pulled through the center position. This should be between 2 and 2-1/2 pounds. 7. If necessary, readjust the lash adjuster screw to obtain the proper pull. Tighten the lock nut and again check for proper pull. 8. Fill the assembly with Steering Gear, "All Purpose," or '"Universal" gear lubricant to the level of the filler plug hole and replace the filler plug. When the proper adjustments have been made and the steering gear lubricated, the assembly is ready to be replaced in the truck. In doing this make sure that no "bind" is set up when tightening the mounting bolts and mast jacket to instrument panel clamp.

	Fig. 24—Checking Sector Shaft Lash Adjuster End Clearance end clearance, a steering gear lash adjuster shim unit, Part No. 605142, is available. It contains four shims: .063", .065", .067", and .069" thick. 5. After the lash adjuster end clearance has been adjusted start the sector shaft pilot into the bushing in the side cover. Then, using a screwdriver through the hole in the cover, turn the lash adjuster in a counterclockwise direction to pull the sector shaft pilot into its bushing as far as it will go.