Toyota 31210-12221-84
Pressure Plate

Service and repair of the pressure plate begins by extracting the transaxle from the engine followed by clutch disc removal involving positioning the clutch cover matchmark with the flywheel mark then untightening each set bolt with small turns until spring tension releases. After this the technician carefully extracts the clutch cover combined with the clutch disc without letting the disc drop. The service begins with the removal of the release bearing and fork together before separating them and concluding with removal of the release fork support and boot. The clutch disc inspection requires using calipers to measure rivet head depth which must exceed 0.3 mm (0.012 inch) depth; otherwise replace the clutch disc. Inspect the clutch disc runout using a dial indicator and maintain replacement if this is above 0.8 mm (0.031 inch), simultaneously check the flywheel runout which should not pass 0.1 mm (0.004 inch) before replacing the flywheel. The diaphragm spring requires replacement when its depth measurement exceeds 0.5 mm (0.020 inch) and its width measurement exceeds 6.0 mm (0.236 inch). The release bearing requires replacement if you find signs of wear during a manual turning test with applied axial force. Special Service Tool: 09301-00210 should be inserted into the clutch disc before placing it on the flywheel with correct direction installation. Finally secure the 6 bolts in the correct sequence to a torque of 19 Nm (195 kgf-cm, 14 ft. lbs.) while ensuring even tightening and checking for disc centering. The technician must verify diaphragm spring tip alignment using a dial indicator until it stays within 0.5 mm (0.020 inch). When out of range they should employ Special Service Tool: 09333-00013 to make adjustments. The transaxle must receive the boot and release fork support with product torque set to 37 Nm (375 kgf-cm, 27 ft. lbs.). Subsequently apply molybdenum disulphide lithium base grease (NLGI NO. 2) at the mentioned contact points. The technician applies recommended grease part number 08887-01706 (100g) to the release fork and release bearing contact points as well as the release fork and push rod contact point and the release fork and pivot point and the clutch spline. Reinstall the transaxle to the engine after you insert both the release bearing and fork onto the transaxle.

The clutch disc runout should not exceed 0.8 mm (0.031 inch) and the flywheel runout should not exceed 0.1 mm (0.004 inch); replace the flywheel if necessary.