1942 - 1947 Chevrolet Shop Manual



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	Fig. 38—Checking Kingpin Camber KINGPIN INCLINATION CHECK 1. Turn the wheel on which the check is being made OUT 25°. 2. Set the gauge on the spindle with the scale turned parallel to the wheel. 3. With the pointer on the gauge set at zero, turn the gauge on the spindle until the bubble in the level is centered. 4. Now turn the wheel IN 25° and adjust the gauge until the bubble in the level is centered and read the amount of kingpin inclination on the scale. Fig. 39. STEERING GEOMETRY Steering geometry or front wheel toe-in and toe-out on turns is controlled by the steering arms in the same manner as on passenger cars, and checking this determines whether or not the steering arms are bent. Both of these checks are made on truck front axles using the "Jiffy" J-751 turntables in a manner similar to the passenger car on the front end machine. With the front wheels resting in a straight-ahead position on the turntables, and the pointer of each turntable set on zero, check the right steering arm by turning the left wheel in so the pointer rests on the 20 degree mark; the pointer on the right wheel turntable will now indicate the amount of toe-out which should be 23 degrees, plus or minus 2 degrees, on all trucks. To check the left steering arm, turn the right wheel in 20 degrees and repeat the operation described above for checking the right steering arm. When the right wheel does not have the proper amount of toe-out, replace the right steering arm. When this condition exists on the left wheel, replace the left steering arm.	*Fig. 39—* Checking Kingpin Inclination TOE-IN Front wheel toe-in is checked using the J-710-0 Toe-In Gauge, measuring first at the rear of the axle on the front tires, then, after rolling the car forward, at the same point on the tires which will now be at the front of the axle. The variation as shown on the gauge is the amount of toe-in or toe-out. The proper toe-in is 5/64" to 1/8" for all truck models. To adjust or set the toe-in, loosen the clamp bolts at each end of the tie rod and turn the rod as necessary to arrive at the correct toe-in. CORRECTING FRONT-END ALIGNMENT CASTER CORRECTION** Caster corrections in ordinary amounts may be made with the use of caster shims. To increase caster, place the thick side of the shim toward the back between the spring seat and the spring. To decrease caster, place the thick side of the shim toward the front. The maximum amount of caster correction that should be made with the use of shims is 2° and anything over this amount should be corrected with the use of Correcting Tools.

		Fig. 4D—Decreasing Caster on Right Sid*