Clutch malfunction

Category: Industry News

Release Date: 2014-11-24

Summary: 1. Pay attention to whether the clutch is slipping. There are several possible causes: primarily, the clutch pedal free play is too small; the release bearing frequently presses against the diaphragm spring, keeping the pressure plate in a partially disengaged state; or the clutch pressure‑plate springs are too weak or broken; additionally, the bolts connecting the clutch to the flywheel may be loose. 2. At idle, the clutch can only be fully disengaged when the clutch pedal is depressed almost to the floor. If, when you press the pedal, you experience difficulty shifting gears, hear harsh grinding noises from the transmission, or notice that the vehicle begins to move without releasing the clutch after engaging a gear, these symptoms indicate that the clutch is not fully disengaging.

　　1. Check whether the clutch is slipping. There are several possible causes, the main ones being: an excessively short free play of the clutch pedal; the release bearing frequently pressing against the diaphragm spring, keeping the pressure plate in a partially disengaged state; overly soft or broken clutch pressure‑plate springs; or loose bolts connecting the clutch to the flywheel.
　　2. At engine idle, the clutch should be disengaged only when the clutch pedal is depressed almost to the floor. If, upon depressing the clutch pedal, you experience difficulty shifting gears, hear harsh grinding noises from the transmission, or fail to release the clutch after engaging a gear and the vehicle begins to move, these symptoms indicate that the clutch is not fully disengaged.
　　3. When the clutch pedal is depressed to three-quarters of its travel, the clutch should engage firmly; otherwise, check whether the pedal travel is appropriate. Use a ruler to measure at the pedal: first determine the height of the pedal in its highest position, then measure the height when the pedal is pressed down until resistance is felt. The difference between these two measurements is the clutch pedal travel for that vehicle.
　　4. Abnormal noises during clutch operation are also indicative of a malfunction. Possible causes include severe wear of the release bearing, a excessively soft or broken return spring, or a faulty diaphragm spring retainer.

Keywords: Clutch malfunction

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