Concentric Slave Cylinder and Hydraulic Release Bearing Replacement Procedure:

1. Diagnosis: First, a diagnosis is required to determine if there is a problem with the concentric slave cylinder or hydraulic release bearing. This usually involves checking fluids, checking system pressures and performing a physical inspection. 

2. Prepare Tools and Parts: Based on the diagnosis, prepare the necessary tools and replacement parts.

3. Remove the old part: Remove the defective concentric slave cylinder or hydraulic release bearing, which may require disassembly of the associated connecting lines and brackets.

4. Install the new part: Install the new concentric slave cylinder or hydraulic release bearing, making sure that all connections are correct and in accordance with the manufacturer's specifications.

5. Test: After replacement, perform a test to ensure that the new component is working properly, the transmission is shifting smoothly, and there are no leaks or other malfunctions.

Please note that the exact replacement procedure may vary depending on the model of vehicle and type of transmission, so it is best to follow the manufacturer's service manual or consult a professional service technician when performing the replacement.

Precautions for replacing the concentric slave cylinder:

1. Clean working environment: Before replacing the concentric slave cylinder, make sure the working surface and surroundings are clean to avoid contaminants entering the new part.

2. Correct disassembly and installation: When disassembling the old concentric follower, pay attention to correctly disassemble the connecting piping and bracket to avoid damaging other parts. When installing a new concentric slave, make sure the bolts and nuts are installed in the correct order and torque.

3. Inspect seals: When replacing concentric slave cylinders, inspect the seals to make sure they are in good condition and replace them if damaged.

4. fluid change: after replacing the concentric slave, the transmission fluid should be changed to ensure a clean system and to minimise wear on the new parts.

5. Check Fluid Level: After replacing the fluid, check to see if the fluid level is in the proper position, too much or too little may affect the proper operation of the concentric slave cylinder.

6. Hydraulic system test: After replacing the concentric slave cylinder, conduct a hydraulic system test to check whether the system pressure and function are normal.

Commissioning after replacing the hydraulic release bearing:

1. Static commissioning: Before starting the engine, carry out static commissioning to check whether the engagement and separation of the separation bearing is smooth and without abnormal noise or vibration.

2. Dynamic debugging: After starting the engine, carry out dynamic debugging to check the performance of the separation bearing under actual working conditions. This includes whether the gear shift is smooth, whether there is any shock or delay, and whether there is any oil leakage.

3. Shift test: Shift test under different speeds and loads to ensure that the release bearing can work normally and adapt to different driving needs.

4. Temperature test: After a long period of operation, check whether the temperature of the separation bearing is normal to judge its working condition.

5. Fault detection: If abnormal behaviour is found in the release bearing, use a fault detector to carry out fault detection, find out where the problem lies and make adjustments or repairs accordingly.

Maintenance points of concentric slave cylinder:

1. Regular Inspection: Regularly check the condition of the gearbox fluid to check for leaks or contamination, the colour and smell of the fluid can also provide clues as to the working condition of the concentric slave cylinder.

2. Fluid Change: Change the transmission fluid at the manufacturer's recommended intervals. This will help keep the concentric slave cylinders and other transmission components working properly.

3. Hydraulic System Pressure: Check the pressure in the hydraulic system, as insufficient pressure may cause the concentric slave cylinder to operate improperly.

4. Cleaning and Lubrication: Ensure that the seals and mating surfaces of the concentric slave cylinders are kept clean and lubricated to prevent wear and leakage.

5. Replace worn parts: If seals or other parts of the concentric slave cylinder are found to be worn, replace them according to the manufacturer's specifications.

Symptoms of hydraulic release bearing failure:

1. delayed shifting: a release bearing failure may result in delayed shifting because the clutch or brake does not engage or disengage in a timely manner.

2. Uneven shifting: When the release bearing is not working properly, shifting may be felt as uneven or accompanied by shocks.

3. Abnormal Noise: When the release bearing is worn or damaged, an abnormal noise may be produced during transmission operation.

4. Fluid Leakage: Failure of the release bearing may result in fluid leakage, as its seals may have been damaged.

5. Transmission overheating: If the release bearing is not working efficiently, it may cause the transmission to overheat as the efficiency of power transmission is reduced.

Please note that replacing the concentric slave cylinder and the hydraulic release bearing is a complex operation that requires specialised skills and knowledge. If you are not a professional, it is recommended to seek professional help during the replacement and commissioning process to ensure safety and technical correctness.