Scion 31250-12360 Disc Assembly, Clutch

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The clutch parts are usually accessed with the transaxle of the vehicle in place, although the engine remains a part of the car. In case of a major overhaul of the engine then the clutch should also be checked for signs of wear and expectedly repairing or replacing damaged parts is best done at this stage since parts of the clutch are relatively cheaper than the time it would take to access the clutch. The following procedures are based on assumed that the engine stays in the car. Start by sliding the release cylinder back and ensure it is out of the way but do not detach the hose. Subsequently, take out the transaxle from the car and make sure that the engine is effectively supported and maybe with an engine lift or support stand. If using a jack place a piece of wood between the jack and the oil pan and be careful as the oil pump pick up is towards the end of the pan and may distort the pan and lead to oil starvation. It is acceptable to leave the release fork and bearing connected to the transaxle for a while longer. For clamping support of the clutch disc, screw in a clutch alignment tool through the disc hub. Search the surface of the flywheel as well as the pressure plate for signs of indexing and in the absence of such signs, make them yourself once you are to reassemble the unit. Lose the pressure plate to the flywheel bolts diagonally, in order to ease the tension of the clutch spring, then take the bolts, then the pressure plate, as well as the clutch disc. While inspecting the engine components, examine the flywheel for presence of any crack or any defect on its surface and it should be corrected by resurfacing if there is any. For the clutch disc lining, see that they are worn by at most 1/32-inch above the rivet heads and appear for any damage. Products like the release bearing should be replaced together with the clutch disc. Check pressures of the pressure plate for signs of wear or damage, if worn replace the pressure plate. Several new shells about flywheel and pressure plate: Before the installation the machined surfaces of the flywheel and pressure plate have to be free of oil and grease. Insert the clutch disc on the flywheel with the help of an alignment tool and make sure that the pressure plate is installed in the correct manner. Now again tighten the pressure plate-to-flywheel bolts up to just 'snug' fit, align the clutch disc and then in a cross-hatch sequence tighten these bolts and finally use a torque wrench on them. In the inner groove of the release bearing as well as around the contact surfaces of the release lever and the input shaft bearing retainer apply HTL. The next step is to bolt in the clutch release bearing, the transaxle and the back in the components that were previously removed: everything must be tightened to the recommended torque.

Tighten the bolts only finger tight, working around the pressure plate. Then, center the clutch disc by ensuring the alignment tool is through the splined hub and into the recess in the crankshaft. Tighten the bolts a little at a time in a crisscross pattern to prevent distortion.

When a new pressure plate is indicated, factory-rebuilt units are available.