6857432 Clutch Master Cylinder for Volvo F12

What does a clutch master cylinder do?

This clutch master cylinder functions as the primary unit responsible for converting mechanical pedal force into hydraulic pressure. This pressure is then transmitted through the hydraulic line to the slave cylinder to facilitate smooth gear engagement. Built with heavy-duty grade materials, this component ensures consistent performance under high-pressure operating conditions.

Compatible vehicles and engines

This specific unit is designed to fit Volvo F12 trucks equipped with TD120 engines. It serves as a direct replacement for components used in these heavy commercial vehicle applications, ensuring proper system integration and pedal feel.

Installation and maintenance

Technicians should verify the Ø23.81 mm port size and mounting specifications before installation. To maintain optimal clutch performance, regular inspection of the hydraulic lines and seals is recommended to prevent pressure loss or air ingress into the system.

Troubleshooting and selection

If the clutch pedal feels spongy or fails to disengage the transmission properly, it may indicate a failure in the master cylinder assembly. Always ensure the hydraulic fluid is clean and meets the manufacturer's specifications during replacement.

OE cross-reference

306.02.0070 (Master Cylinder) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 6857432.