1) failure phenomenon

When the car starts, the clutch pedal is completely relaxed, and the car can't start or start difficult.

2. When the vehicle accelerates, the speed cannot increase with the increase of the engine speed. The power of the engine can't be completely transmitted to the driving wheel, resulting in weak driving and obvious phenomenon on the uphill slope. When severe, it will emit the scorching odor caused by the overheating of the friction lining.

2) the cause of the failure

The main reason for skidding is that the friction force of the clutch friction plate is insufficient and the friction force is caused by the following reasons:

(1) Baotou North Ben heavy truck accessories clutch pedal free travel is too small or disappear; separation lever and the separation bearing clearance is too small or disappear; the clutch cover deformation or the connection with the flywheel loose, so that the pressure plate is in a semi separation state, and it will slip when transferring power.

The wear of the clutch friction plate is thinner, the rivet exposure, the surface hardening, the ablation or the oil pollution, make the friction coefficient decrease.

(3) the improper operation of the driver leads to the overheating of the spring mill and the decrease of the elastic force; the individual spring is broken by fatigue and the pressure is reduced.

(4) the clutch rod system is stuck. The clutch pedal of Baotou Bei Ben heavy truck fittings can't be returned to the location completely. It can't make Baotou Bei Ben heavy truck accessories separate bearing and leave the lever.

3) analysis and diagnosis

The starting of the engine, the clutch pedal, the lever to hang into the low gear, tightened hand brake lever, the detonation of a throttle slightly, slowly lift the clutch pedal, the clutch engagement, if only three seconds after the engine flameout, this is the sign of clutch start to slip; if the engine is not running off, this is the clutch is slipping.

After the clutch skidding, check the clutch pedal free travel is too small. Remove the bottom cover of the clutch and check whether the gap between the separation bearing and the separation lever is in accordance with the manufacturer's regulations. If the free travel is normal, it is necessary to check the reliability of the clutch cover and the flywheel. It should be adjusted and tightened for not meeting the requirements.

If the above debugging is invalid, the clutch assembly should be removed to check the status of the friction disk, for example, whether the surface of the friction disc is stained with oil, whether the surface of the friction piece is slightly eroding or hardening, and whether there are individual rivets.

When the friction plate is in good condition, the clutch is decomposed and the elastic force of the spring is checked. If there is a slight reduction in individual spring sprit, it can be continued to use the washer with appropriate thickness under the compression spring. If the elastic force is too weak or even broken, it should be replaced.