Toyota 31210-12291
Pressure Plate

Service and repair of the pressure plate begins with transaxle removal from the engine followed by clutch cover and disc removal after aligning both matchmarks between clutch cover and flywheel while using the spring tension method to loosen the set bolts individually until spring release occurs and finally removing the set bolts to avoid clutch disc drop. The service procedure begins by taking away the release bearing and fork assembly before separating them next and completing the process with release fork support and boot removal. Professional use of vernier calipers is essential to measure clutch disc rivet depth which requires a minimum depth of 0.3 mm (0.012 inch) while replacement is needed if this value is not maintained. Use a dial indicator to measure the clutch disc runout only when it stays under 0.8 mm (0.031 inch). Verify the flywheel runout with the same tool checking its maximum value at 0.1 mm (0.004 inch) before replacing it if necessary. The initial flywheel bolt tightening starts by using even torque pressure to reach 49 Nm (500 kgf-cm, 36 ft. lbs.), after which the bolts receive an additional 90° rotation before verification of the painted mark at a 90° angle. Measure the diaphragm spring depth and width to determine replacement of the clutch cover when depth reaches 0.5 mm (0.020 inch) or width exceeds 6.0 mm (0.236 inch). A functional release bearing can be assessed through manual rotation under axial pressure conditions. Otherwise, replace the bearing if necessary. Special Service Tool: 09301-00210 should be inserted into the clutch disc to attach it onto the flywheel while making sure the disc enters correctly and lining up the matchmarks found on the clutch cover and flywheel. Tighten the six bolts to 19 Nm (195 kgf-cm, 14 ft. lbs.) using a specific installation sequence while verifying that the disc maintains its center position throughout the process. A dial indicator helps you check the diaphragm spring tip alignment for maximum non-alignment less than 0.5 mm (0.020 inch). When the alignment exceeds this amount use Special Service Tool: 09333-00013 for manual adjustment. Use a maximum 37 Nm torque (375 kgf-cm, 27 ft. lbs.) to fasten the boot and release fork support to the transaxle while applying release hub grease (Part No. 08887-01806) to both release fork and hub contact areas and applying clutch spline grease (Part No. 08887-01706) to the input shaft spline. Reinstall the transaxle to the engine after you install both the release bearing and fork to the transaxle.

The pressure plate overhaul process begins with removal of manual transaxle components and then proceeds with the sequential removal of clutch release fork sub-assembly before extracting the fork and bearing from the transaxle assembly. Begin the process by removing the clutch release bearing assembly from the clutch release fork before moving to the release fork support from transaxle assembly and afterward taking off the release bearing hub clip and clutch release fork boot. Use a socket wrench to line up the matchmarks while untightening each bolt gradually until the spring tension frees, then remove the 6 bolt to disconnect the clutch cover assembly without letting the clutch disc assembly fall. After removing the clutch disc assembly maintain a clean status for the lining part and pressure plate and flywheel sub-assembly surface surface free from oil and foreign objects. Measure the distance of the rivet heads on the clutch disc assembly with vernier calipers to verify it stays below 0.3 mm (0.012 inch) before continuing; replace the clutch disc assembly if needed. Install the clutch disc assembly into the transaxle assembly while facing it in the right direction and run it through a dial indicator which should read less than 0.8 mm (0.031 inch) at most; replace if this limit is exceeded. Verify the clutch cover assembly diaphragm spring wear with vernier calipers to confirm both depth exceeds 0.5 mm (0.020 inch) and width exceeds 6.0 mm (0.236 inch); perform a replacement if necessary. A dial indicator must check the flywheel sub-assembly runout which should not exceed 0.1 mm (0.004 inch). Replace the component if required. To check the clutch release bearing assembly function properly turn it by hand under axial force conditions; perform a replacement of the release bearing assembly if required. Install the clutch disc assembly through Special Service Tool: 09301-00210 which should go first into the clutch disc assembly then into the flywheel sub-assembly while maintaining proper orientation. Install the clutch cover assembly by aligning the matchmarks before tightening the bolts in a specified order up to 19.1 Nm (195 kgf-cm, 14 ft. lbs.) torque while checking for disc centering. To inspect and adjust clutch cover assembly so diaphragm spring tip alignment can be checked with a dial indicator for maximum non-alignment of less than 0.5 mm (0.020 inch), Special Service Tool: 09333-00013 should be used to conduct any necessary adjustments. The transaxle assembly should receive the release fork support which requires 36.8 Nm (375 kgf-cm, 27 ft. lbs.) torques while the clutch release fork sub-assembly installation must be accompanied by application of release hub grease (Part No. 08887-01806) at contact points. Before installation of the clutch release bearing assembly you must apply clutch spline grease (Part No. 08887-01706) to the input shaft spline. Also verify that the release bearing slides easily once installed. End the installation process by installing both the clutch release fork boot together with the manual transaxle.

Align the matchmarks and tighten the 6 bolts in the specified order to a torque of 19.1 Nm (195 kgf-cm, 14 ft. lbs.).