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Operating principle and advantages

A clutch booster (often known as a servo booster) supports the actuation of the clutch hydraulically or pneumatically so that less pedal force is required. Particularly with high power or heavy vehicles, a booster ensures smoother and effortless clutching – for both the driver and the mechanics.

Integration into the system

For a clutch booster to function optimally, it must be matched to the existing clutch and hydraulic system. Pressure ratios, actuation stroke and feedback must harmonize so that the booster works correctly and no disruptive readjustment behaviour occurs.

Clutch booster

What should you look out for when buying:

CLUTCH SYSTEM

The amplifier must harmonize with your existing master/ slave cylinder system.

AMPLIFICATION FACTOR

Check how strong the power assistance should be – too little has little effect, too much can cause uncontrolled power guidance.

CONNECTIONS

Make sure that the fixing points, connection terminals and installation dimensions match your vehicle.

Expert Guide: Everything You Need to Know About the Clutch Booster

The clutch booster—also known as a servo booster—provides hydraulic or pneumatic assistance for operating the clutch. This significantly reduces the amount of pedal force required. Especially in heavy vehicles or those with high power output, it ensures smoother, less strenuous clutch operation—for both the driver and the vehicle’s mechanical components.

The booster uses the available hydraulic or pneumatic pressure to amplify the pedal force applied by the driver and transmit it to the slave cylinder. The pressure ratios, actuation stroke, and feedback must be in harmony so that the amplification works smoothly and no disruptive readjustment occurs.

Typical signs include a noticeably stiff clutch pedal, uneven or jerky clutch operation, leaks (oil or air) from the booster, and changes in pressure response. These symptoms should be checked, as they make shifting difficult and put a strain on the clutch.

The booster must be compatible with the existing master/slave cylinder system and provide an appropriate boost ratio—too little has little effect, while too much can lead to uncontrolled force transmission. Also, make sure that the mounting points, connections, and installation dimensions are compatible with your vehicle.

Whether it’s a truck, trailer, bus, van, or farm machinery—we offer premium-quality replacement parts and accessories, as well as affordable aftermarket and compatible parts. This means we have the right solution for nearly every popular brand.

Increase your dome comfort!

With the right booster, you can reduce the use of force, protect components and improve driving dynamics – especially under load. Find suitable solutions and upgrade your clutch control system in a targeted manner.