CLUTCH PROBLEMS

摘要

No release is probably the most common of all clutch problems. The purpose of the clutch is to couple and decouple the engine and transmission. Poor clutch release makes it difficult to impossible to start and stop the vehicle or change gears. Common release problems are: 1. Air in a hydraulic release system; 2. A flywheel that has been machined too thin; or 3. A flywheel where the step or cup dimension is out of specification. Yet, another condition may be that the disc damper can interfere with flywheel crank bolts resulting in no release as well. Flywheel step and cup dimensions are critical to proper clutch operation. Too tall of a step or too shallow of a cup can create a "thick disc condition." A thick disc condition will reduce or eliminate clearance between the disc, flywheel and clutch friction surfaces and cause release problems. Flywheel run out should also be inspected.