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FRONT SERVO Clean the servo piston components with solvent and dry them with compressed air. Wipe the band Replace the front band if distorted, lining is burned, flaking off, or worn to the point where the Inspect the servo components. Replace the springs if collapsed, distorted or broken. Replace the guide, Check the servo piston bore for wear. If the bore is severely scored, or damaged, it will be necessary to Replace any servo component if doubt exists about condition. Do not reuse suspect parts. REAR SERVO Remove and discard the servo piston seal ring (Fig. 304). Then clean the servo components with solvent OIL PUMP AND REACTION SHAFT SUPPORT (1) Clean pump and support components with sol- vent and dry them with compressed air. (2) Check condition of the seal rings and thrust washer on the reaction shaft support. The seal rings (3) Inspect the pump and support components. Replace the pump or support if the seal ring grooves damaged. Replace the pump gears if pitted, worn (4) Inspect the pump bushing. Then check the reaction shaft support bushing. Replace either bush- (5) Install the gears in the pump body and mea- sure pump component clearances as follows: (a) Clearance between outer gear and reaction shaft housing should be 0.010 to 0.063 mm (0.0004 (I) Installing the pump gears in the pump housing. (II) Position an appropriate piece of Plasti- gage y across both gears. (III) Align the plastigage to a flat area on the reaction shaft housing. (IV) Install the reaction shaft to the pump housing. (V) Separate the reaction shaft housing from the pump housing and measure the Plastigage y following the instructions supplied with it. outer gear should be 0.08 to 0.19 mm (0.0035 to (c) Clearance between outer gear and pump housing should also be 0.010 to 0.19 mm (0.0035 to FRONT CLUTCH Clean and inspect the front clutch components. Replace the clutch discs if warped, worn, scored, Replace the clutch spring and spring retainer if either is distorted, warped or broken. Check the lug grooves in the clutch retainer. The steel plates should slide freely in the slots. Replace Check action of the check ball in the retainer (Fig. 305). The ball must move freely and not stick. NOTE: Inspect the clutch retainer bushings care- Fig. 304 Rear Servo Components 1 – SNAP RING 21 - 138 42/44RE AUTOMATIC TRANSMISSION DN CLEANING AND INSPECTION (Continued) |