Car Components – Part 2 – Clutch Associated Areas

At A1 Clutches we do not just fit a clutch; we make sure all other associated areas are checked. So if you get a call from us advising other replacement parts it is for your benefit and ensuring your clutch will last longer.

For Example:
When replacing the clutch, the clutch-associated areas will also be carefully inspected and, if necessary, the components changed to prevent problems occurring in the future. Fault-free clutch cables, pilot bearing, guide sleeves, flywheels and concentric slave cylinders (CSC) are important prerequisites for ensuring that the clutch functions with no problems. This reduces the number of trips to the workshop and achieves a higher level of customer satisfaction.

The clutch cable enables mechanical power transmission between pedal and release bearing. Faults can usually only be recognised when under stress and correct testing is not possible in the workshop. The clutch cable should therefore be changed as a precautionary measure when the clutch is replaced.

Pilot Bearing
The pilot bearing supports the clutch shaft. A worn bearing is slack and allows the shaft to move. This causes grabbing on the clutch which results in increased wear and possible complete failure.

Guide Sleeves
The guiding sleeve has an extremely large influence on the release procedure. Worn guiding sleeves demonstrate the following clear symptoms: slow clutch linkage, stagnant pedal paths and noise.

To ensure that the engine runs evenly, a large moulding body the flywheel is attached to the crankshaft. It stores kinetic energy temporarily and releases it again evenly. A ring gear is attached to the flywheel for starting the engine. A side of the flywheel forms the friction couple surface with the clutch disk. In the centre of the flywheel is the pilot bearing for the transmission shaft.

Dual Mass Flywheel:
Particularly at low speeds, the unavoidable vibrations caused in a vehicle are detected mainly as rattling and humming. The dual mass flywheel fulfils two tasks. It holds the gear ring for starting the engine and damps the entire drive chain. The disc flywheel is separated into two masses which can be turned against each other up to 120% via a bearing. The two decoupled masses are connected via an efficient damping spring system. This not only helps to avoid noise, but also enables comfortable driving at low speeds in order to reduce fuel consumption.

Damped Flywheel Clutch:
The DFC is an upgrade of the dual mass flywheel. The clutch disc, clutch assembly and the crankshaft screws are already built in. All this combined creates an extremely compact module, which makes assembly significantly easier.


The clutch transfers the power and the release bearing ensures correct function. The release bearing is the connection between the rotating clutch assembly on the engine side and the fixed release mechanism on the transmission side. The guide sleeve of a release bearing is moved by radial adjustment to guarantee an optimal central position to the diaphragm spring tips of the diaphragm spring clutch when installed. This helps prevent wear in the diaphragm spring finger area.
One in every two new vehicles with clutches now have a concentric slave cylinder. This combines the clutch slave cylinder and the traditional release bearing in one component.
The release bearing or the concentric slave cylinder should be replaced with every clutch repair.

High Performance Grease:
Special temperature resistant, highly-adhesive grease, which is free from particulate matter must be used for lubricating the hub and guiding sleeve.

A1 Clutches always ensure you get the best service, the best advice and the best quality.