Toyota 31210-12191-84
Pressure Plate

Service and repair of the pressure plate requires engineers to first remove the transaxle from the engine and then remove the clutch cover and disc after aligning the matchmarks between clutch cover and flywheel while slowly loosening each set bolt until spring tension releases before removing the bolts to extract the clutch cover and disc without dropping the clutch disc. The procedure starts with uninstalling the release bearing and fork combination then splitting apart each piece followed by removing the release fork support and boot. The examination process requires measuring clutch disc rivet head depth with vernier calipers to verify it surpasses 0.3 mm (0.012 inch) depth; otherwise discard the clutch disc. The clutch disc requires testing using a dial indicator to verify runout falls below 0.8 mm (0.031 inch) while flywheel runout should be less than 0.1 mm (0.004 inch) for replacement purposes. The depth of measurement for the diaphragm spring should not rise beyond 0.5 mm (0.020 inch) and its width beyond 6.0 mm (0.236 inch) and if either limit is reached a new clutch cover needs installation. Examine the release bearing through hand rotation under axial pressure; carry out a replacement when required. Use Special Service Tool: 09301-00210 to install the clutch disc onto the flywheel by placing it correctly and matching its markers with those of the clutch cover and flywheel. The 6 clamping bolts should be tightened according to sequence starting with the knock pin bolt to obtain a torque setting of 19 Nm (195 kgf-cm, 14 ft. lbs.) and achieving equal bolt tension. Verify the disk stays centered. The dial indicator will gauge the diaphragm spring positioning to verify maximum differential is under 0.5 mm (0.020 inch). Use Special Service Tool: 09333-00013 to adjust if needed. The boot and release fork support should be installed onto the transaxle using 37 Nm (375 kgf-cm, 27 ft. lbs.) torque before applying release hub grease (Part No. 08887-01806) at four points: release fork and hub contact, release fork and push rod contact, and release fork pivot points. Complete the installation of the transaxle to the engine by first applying clutch spline grease (Part No. 08887-01706) to the input shaft spline then installing the release bearing to the release fork followed by their placement on the transaxle.