1942 - 1947 Chevrolet Shop Manual



	4-14

	Pinion Disassembly 1. Clamp the rear yoke of the universal joint in a bench vise and remove the cotter pin, nut and washer from the end of the pinion shaft. The universal joint rear yoke as well as the bearing retainer and oil seal may then be removed from the pinion shaft. 2. To remove the rear pinion bearing, take off the lock ring and then using a special press plate, J-1453. press the pinion and shaft out of the bearing, Fig. 23. NOTE—The raised portion of the press plate must be against the inner race otherwise the bearing will be damaged. 3. Install the front pinion bearing remover J-1439 for 6 tooth pinion, J-1440 for 7 tooth pinions, over the pinion teeth and against the inner race of the double row pinion bearing. Then press the bearing off the pinion shaft, Fig. 24.	2. Press the rear bearing on the end of the shaft with the chamfered side of the inner race toward the pinion. Install the lock ring using the lock ring installer J-1364, Fig. 25. 3. Slide the pinion bearing retainer and oil seal over the universal joint yoke. If replacement of the oil seal is necessary, install the felt packing toward the bottom of the recess and then the oil seal with the open end of the leather toward the pinion bearing. The oil seal should be pressed, down against the felt packing, Fig. 15. NOTE—Soak a new leather oil seal in light engine oil for at least one hour before installing.


		Fig. 25—Rear Pinion Bearing Lock Ring Installer 4. Install the pinion bearing retainer gasket and then slide the universal joint yoke over the splines on the pinion shaft until it contacts the inner race of the bearing. 5. Place the flat washer on the end of the pinion shaft and tighten the nut down to a torque load of 160 to 280 ft. lbs. Lock the nut in place with the cotter pin. Differential Disassembly The differential side bearings are a press fit on each side of the differential. To remove these bearings, the special puller shown in Fig. 26 should be assembled to the case with the two fingers of the puller in the two notches of the case. This allows the fingers to pull in against the inner race of the bearing which will prevent damage to the bearing. These bearings should never be removed in an arbor press because removing them in this way will damage the bearings so that they will be unfit for further use. After the bearings have been removed, they should be washed in gasoline or cleaning solvent
	Fig. 24—Removing Front Pinion Bearing Inspection Wash all parts in clean gasoline or cleaning solvent. Inspect the pinion for worn or chipped teeth. Inspect the splines on the pinion shaft for wear or scoring. Oil the bearings and turn them slowly by hand to check for roughness. Check the fit of the bearings in the carrier. These should be a close push fit by hand. Inspect the oil seal in the pinion bearing retainer and replace with a new one if necessary. Pinion Reassembly 1. Press the front double-row pinion bearing onto the pinion shaft with the extended portion of the bearing inner race against the back of the gear teeth.