20553587 Volvo B11R D11A Clutch Master Cylinder

What does a clutch master cylinder do?

This clutch master cylinder serves as a critical component in the hydraulic clutch system, converting pedal pressure into hydraulic force to facilitate smooth gear engagement. Manufactured with high-strength components, it is designed to withstand the rigorous operating conditions typical of heavy commercial vehicle service.

Vehicle and engine compatibility

This specific unit is compatible with Volvo B11R trucks featuring D11A engines. It serves as an ideal replacement for maintaining optimal clutch engagement and ensuring reliable shifting performance in demanding fleet operations.

Installation and maintenance

Installation requires careful attention to the Ø28.57 mm port specifications and mounting alignment. Technicians should inspect the hydraulic lines and ensure no air remains in the system during assembly to prevent spongy pedal feel or gear slipping.

Troubleshooting and selection

Regular inspection of the master cylinder seal integrity and fluid levels can prevent premature failure of the entire clutch assembly.

OE cross-reference

306.02.0020 (Master Cylinder) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20553587.