Hydraulic throwout bearings (hydraulic release bearings) in detail

 I. Definition and Function of Hydraulic Throwout Bearing

A hydraulic throwout bearing, also known as a hydraulic clutch release bearing or hydraulic release bearing, is a clutch assembly used in manual transmission vehicles. It combines the hydraulic principle with the clutch release function. When the driver depresses the clutch pedal, the hydraulic throwout bearing receives hydraulic pressure from the clutch master cylinder, which pushes the clutch pressure plate to separate from the clutch disc, thus disconnecting the clutch. In this way, the driver can shift gears smoothly without being disturbed by the engine power.

 II. Hydraulic throwout bearing working principle

1. Clutch pedal operation:

   - When the driver depresses the clutch pedal, the pedal transmits the force to the hydraulic throwout bearing through the hydraulic system (which usually includes the clutch master cylinder and hydraulic lines).

2. Hydraulic action:

   - Hydraulic fluid is pressed inside the hydraulic throwout bearing and the piston inside the bearing moves outward under hydraulic pressure.

3. Pushing the pressure disc:

   - The movement of the piston pushes the clutch pressure plate to separate it from the clutch disc (clutch plate), thus disconnecting the power transmission.

4. Release Pedal:

   - When the driver releases the clutch pedal, the pressure in the hydraulic system decreases, the spring pushes the piston back to its original position, and the clutch pressure plate presses the clutch disc again, resuming power transmission.

 Hydraulic Throwing Bearing Features and Advantages

1. High efficiency and stability:

   - Hydraulic throwout bearing adopts hydraulic transmission, which has high efficiency and stable transmission efficiency, and can ensure fast and accurate clutch disengagement.

2. Noise reduction:

   - Compared with the traditional mechanical clutch release mechanism, the hydraulic throwout bearing generates less noise during operation, which improves driving comfort.

3. Extended service life:

   - The hydraulic throwout bearing adopts special materials and lubrication design, which can reduce friction and wear, thus prolonging the service life.

4. Easy maintenance:

   - The structure of hydraulic throw bearing is relatively simple, easy to disassemble and repair, reducing maintenance costs.

5. Self-adjusting:

   - Hydraulic throwout bearings are usually designed with a self-adjusting feature that automatically adjusts to compensate for clutch pressure plate and clutch disc wear, maintaining stable clutch operation.

6. Durability:

   - Hydraulic throwout bearings are typically more durable than conventional bearings because the hydraulic system reduces direct contact and wear on mechanical components.

7. Responsiveness:

   - Hydraulic systems can respond quickly to clutch pedal action, providing instant clutch release and engagement.

 IV. Application and Importance of Hydraulic Throw Bearing

Hydraulic throwout bearing is widely used in manual transmission vehicles and is one of the key components in the clutch system. Its performance and reliability directly affect the clutch disengagement effect and the driver's shifting experience. Therefore, when selecting and replacing the hydraulic throwout bearing, it should be ensured that its quality and performance meets the requirements of the vehicle manufacturer to ensure the normal operation of the clutch.

 V. Hydraulic Throw Bearing Maintenance and Troubleshooting

1. Regular inspection of the hydraulic throwout bearing:

   - The hydraulic system should be checked periodically for leaks and for clean hydraulic fluid. Leaking or contaminated hydraulic fluid may affect the performance of the bearing. 

2. Hydraulic Throw Bearing Hydraulic Fluid Change:

   - Periodically change the hydraulic fluid according to the manufacturer's recommendations to maintain system cleanliness and performance.

3. Hydraulic Throw Bearing Replacement:

   - If damage or wear is detected in the hydraulic throwout bearing, replace it immediately. Damage to the bearing may cause abnormal clutch operation or even damage to other clutch components.

4. system pressure test:

   - If clutch operation feels abnormal, a pressure test can be performed to check that the hydraulic system pressure is within the specified range.

 VI. Signs of malfunction

1. Change in clutch pedal feel:

   - If the pedal feels heavier or lighter than usual, there may be a problem with the hydraulic system.

2. Incomplete clutch release:

   - If the clutch still does not fully disengage when the pedal is fully depressed, there may be a hydraulic throwout bearing failure.

3. Leakage:

   - Leaks in the hydraulic system can lead to reduced clutch performance, and leaking fluid may also damage other components.

4. Strange noises:

   - If an abnormal noise is heard when operating the clutch, it may be a hydraulic throwout bearing problem.

 Precautions for installing hydraulic throwout bearings

1. Correct fit:

   - When installing a new hydraulic throwout bearing, make sure the bearing fits correctly with the clutch cover and pressure plate.

2. clean connections:

   - Make sure all connections in the hydraulic system are clean and free of leaks.

3. adjust freewheeling stroke:

   - After installation, check and adjust the free travel of the clutch pedal to ensure proper clutch operation.

These detailed explanations and recommendations provide a more complete understanding of the function, maintenance and problems that may be encountered with hydraulic throwaway bearings. Proper maintenance and timely troubleshooting will ensure the long-term stability and performance of the clutch system.

In summary: The hydraulic throwout bearing is a key component of the clutch in manual transmission vehicles, achieving fast and accurate clutch disengagement through hydraulic principles. It is highly efficient and stable, low noise, long life, easy to maintain, and has self-adjustment and durability. To ensure its performance, the hydraulic system should be inspected regularly, the hydraulic oil changed, and the bearing replaced promptly in case of failure. Installation requires attention to proper fit, clean connections and adjustment of free travel. Proper maintenance and troubleshooting will ensure the long-term stability and performance of the clutch system.