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(20) Measure clutch disc thickness (Fig. 260). Min- imum allowable thickness is 1.51 mm (0.0595 in.). (21) Measure free length of piston return springs with springs mounted in retainer (Fig. 261). Length (22) Inspect clutch piston check ball (Fig. 262). Ball should move freely within piston. Check ball (23) Measure inside diameter of bushing in clutch drum hub. Maximum allowable diameter is 24.08 ASSEMBLY (1) Lubricate bearing and race assembly with petroleum jelly and install it in clutch drum (Fig. (2) Coat new clutch drum shaft seal rings with petroleum jelly. Before installing drum shaft seal (3) Install seal rings on shaft. Keep rings closed as tightly as possible during installation. Avoid over- (4) Mount clutch drum on overdrive support. drum hub (Fig. 257). Fig. 260 Measuring Clutch Disc Thickness 1 – CLUTCH DISC Fig. 261 Checking Return Spring Length 1 – PISTON RETURN SPRINGS Fig. 262 Testing Piston Check Ball 1 – PISTON CHECK BALL 21 - 320 AW–4 AUTOMATIC TRANSMISSION XJ DISASSEMBLY AND ASSEMBLY (Continued) |