clutch is one of the essential devices on the manual transmission vehicle, installed between the engine and the transmission, is the engine and the vehicle transmission between the transmission and power components. It can be said that the clutch state directly affects the dynamic performance of the vehicle.
The clutch is mainly composed of clutch friction plate, clutch pressure plate, clutch separation bearing, also known as the "clutch three-piece set". The clutch pressure plate is the most essential part of the clutch assembly, determines whether the clutch will shake after installation, too heavy, the length of the use of time; clutch friction plate determines the clutch service life and damping effect; clutch separation bearing is an essential link in the clutch separation system, which determines the separation efficiency of clutch system and the wear rate of pressure disc separation.
Semi Trailer supplier says If there is a problem in any part of the clutch three-piece set, it will not be replaced separately, but replaced together with the three-piece set. Clutch three-piece set replacement cycle varies from car to car. If it is a normal loss, normally can use about one hundred thousand kilometers, but five or six thousand kilometers on the replacement of the clutch of vehicles is not a minority, the main reason is the use of improper methods.
We can judge whether the clutch of our vehicle should be replaced by the following methods:
1. The vehicle lacks power, especially when climbing the hill. It feels boring;
2. when the vehicle needs to accelerate, the engine speed rises fast, but the vehicle speed rises slowly;
3. when the vehicle is hung into 1 gear, pull the handbrake or step on the brake to start, the vehicle does not stall;
4. when opening the engine room cover, you can smell the obvious burnt smell, especially at the junction of the engine and transmission.
Some owners in the use of the clutch found that there is always slipping, separation is not complete, shaking, abnormal sound and other phenomena, in this case do not need to replace the clutch? In fact, some faults can be eliminated through independent maintenance, owners can be in accordance with the following methods of their own maintenance.
1, the clutch slip
(1) Fault symptoms:
Vehicle 1 gear start, relax the clutch pedal, and can not start smoothly.
When speeding up, the speed can not be increased with the engine speed, driving weak, serious odor or smoke phenomenon.
The engine did not turn off when it should have.
(2) Possible causes:
Clutch pedal free travel too small or no free travel.
The connection between the clutch pressure plate and flywheel is loose, and the compression force is weakened.
The oil pollution between the separating bearing sleeve and the conduit is serious, and the separating bearing can not be returned.
Clutch plate surface ablation, hardening or oil, resulting in reduced clutch friction.
Clutch plates, pressure plates or flywheel face wear seriously.
The pressure spring is weak or broken, the diaphragm spring is weak or cracked, and the compression force is decreased.
(3) Maintenance steps:
(1) Check whether the free stroke of the clutch pedal is suitable, and it is not suitable for adjustment. It is necessary to pay attention to the self-adjusting hydraulic type;
(2) Remove the transmission and check the clutch in turn:
Clutch plate, separator bearing sleeve and conduit should be cleaned in time if there is oil;
clutch plate, pressure plate or flywheel face should be replaced in time if serious wear;
pressure spring, diaphragm spring is weak, broken or insufficient elasticity, if insufficient elasticity or damage should be replaced in time.
2, clutch separation is not complete
(1) Fault symptoms:
When the vehicle is idling, the clutch pedal is pressed, and the gear strikes when the gear is hanging, and it is difficult to hang in.
Even if you are hardly in gear, the engine shuts off when the clutch pedal is not sufficiently relaxed.
(2) Possible causes:
Clutch pedal free travel is too large.
If it is hydraulic, do not exclude hydraulic system oil leakage caused by insufficient oil or air intrusion.
The newly replaced clutch plate is overly thick or the front and back of the clutch plate are installed incorrectly (the raised side faces the transmission).
Pressure plate steel plate warping, friction plate cracking or rivet loosening.
Improper adjustment of the separation lever or the bending deformation of the separation lever, the loosening of the support, the support pin out, so that the height of the inner end of the separation lever is difficult to adjust.
(3) Maintenance steps:
(1) Check whether the free travel of the clutch pedal is suitable. If the free travel is too large, it should be adjusted;
(2) Check whether the hydraulic system pipeline and pipe joint leak;
(3) Check whether the clutch plate is installed in the correct direction, if there is deformation or damage should be replaced in time;
(4) Check whether the separation lever is deformed, whether the support is loose, and whether the separation lever adjustment is appropriate;
⑤ Check whether the first shaft of the transmission and the clutch driven disk are well matched. If they are improperly matched, they should be adjusted in time.
3, clutch abnormal sound
(1) Fault symptoms:
When the vehicle starts or shifts, the control clutch appears abnormal sound.
(2) Possible causes:
The pedal return spring is too soft, off or broken.
The rivet on the clutch plate is loose or the damping spring is broken.
Separation bearing wear serious or lack of oil, bearing return spring is too soft, broken or fall off.
(3) Maintenance steps:
If you slightly step on the clutch pedal, hear a "rustling" sound, lift up after the sound disappears, it is the separation of bearing noise.
(2) If the clutch pedal still rings after lifting, the bearing is worn loose or damaged, it should be replaced;
(3) If you step down or lift the clutch pedal, there is an interrupted impact sound, it should be replaced by the supporting spring.
4. The clutch shakes when the vehicle starts
(1) Fault symptoms:
The vehicle is mounted into the 1 gear start, the body appears obvious jitter.
(2) Possible causes:
Clutch pressure disc or clutch plate surface warping, or driven disc rivet loose.
The transmission and flywheel housing or clutch pressure plate and flywheel retaining bolt are loose.
Uneven elasticity of the damping spring on the clutch plate.
(3) Maintenance steps:
(1) Check whether the transmission and flywheel housing, clutch cover and flywheel fixing screws are loose.
Check whether the height of the diaphragm spring on the clutch pressure plate is consistent.
(3) If the above all meet the requirements, remove the clutch, respectively check whether the pressure plate, the clutch plate deformation, whether the rivet is loose, and whether the elastic force of the diaphragm spring is within the allowed range.