Hydraulic throwout bearing (often referred to as hydraulic separation bearing) does not disengage the reason may involve a number of aspects, the following are some of the possible causes and explanations:

First, the hydraulic system failure

1. Insufficient pressure: If there is insufficient pressure in the hydraulic system, it may not be able to provide enough power to disengage the throwout bearing. This may be due to hydraulic pump failure, hydraulic line leaks or insufficient hydraulic fluid.

2. Plugged lines: Plugs in the hydraulic lines can impede the flow of hydraulic fluid, resulting in the inability to transfer enough pressure to the release bearing to disengage it.

3. Electrical faults: If there are electrical faults in the control part of the hydraulic system, such as sensor failure, control unit failure, etc., it may also lead to the separation of bearings can not be disengaged as expected.

4. Hydraulic oil leaks: Leaks may cause a drop in system pressure that prevents the release bearing from being pushed.

5. Hydraulic pump failure: the hydraulic pump is damaged or worn, unable to provide sufficient hydraulic oil.

Second, the separation bearing itself

1. Bearing wear: After a long period of use, the components of the separation bearing may wear out, such as the outer ring, inner ring or steel balls of the bearing. These abrasions may result in the bearing not being able to move smoothly or disengage.

2. Seizure phenomenon: due to poor lubrication, entry of foreign objects or design defects, etc., the separation bearings may be seized, that is, they cannot move freely or disengage.

Third, improper operation or external factors

1. Improper operation: the driver may not step on the clutch pedal correctly or operate improperly during operation, resulting in the hydraulic release bearing not working as expected.

2. External resistance: In some cases, such as clutch disc sticking, internal failure of the gearbox, etc., external resistance may be generated, preventing the release bearing from disengaging.

3. Environmental factors:

   - Temperature effects: extremely low or high temperatures may affect the fluidity of the hydraulic fluid and the performance of the release bearing.

Four, other causes

1. Design defects: the design of the hydraulic separation bearing may be defective, such as unreasonable structure, improper choice of materials, etc., which may affect its normal operation.

2. Improper maintenance: If the hydraulic system is not maintained for a long time or improper maintenance (such as not timely replacement of hydraulic oil, cleaning of hydraulic lines, etc.), may also lead to separation bearings can not be disengaged.

3. Failure of connecting parts:

   - Damaged release lever: A damaged release lever may not transmit the force of the hydraulic system to the clutch pressure plate.

   - Loose connection pins or bolts: Loose pins or bolts connecting the release bearing to the release lever may result in poor transmission of force.

4. Clutch pressure disc problem:

   - Pressure disc spring failure: If the pressure disc spring is damaged or has lost its elasticity, it may not be able to push the release bearing back into place, resulting in the bearing not disengaging.

   - Friction between the platen and flywheel: Excessive wear or dirt may cause increased friction between the platen and flywheel, making it difficult for the release bearing to push the platen.

Hydraulic throwout bearing not disengaging Solution

For the above possible causes, the following measures can be taken to solve the problem:

1. Check the hydraulic system: check whether the hydraulic pump, hydraulic pipeline, hydraulic oil, etc. are normal, to ensure that the hydraulic system can provide sufficient pressure.

2. Check the separation bearing: Check the wear of the separation bearing and replace or repair if necessary.

3. Improve operation: Make sure the driver operates the clutch pedal correctly to avoid problems caused by improper operation.

4. Enhance maintenance: Regularly maintain the hydraulic system, including replacing the hydraulic oil and cleaning the hydraulic lines, to ensure the normal operation of the system.

5. Seek professional help: If the problem is more complex or difficult to solve, you can seek professional automotive repair personnel or technicians to help.

In summary, the hydraulic throwout bearing does not disengage may be due to hydraulic system failure, separation bearing itself, improper operation or external factors. Solutions include checking the hydraulic system, the separation bearing, improving operation and strengthening maintenance. If the problem is complex or difficult to solve, professional help can be sought.