21710522 S3 Volvo FH (FH4/FH5) D11K Clutch Servo Repair Kit

What does a clutch servo repair kit do?

This clutch servo repair kit serves as a vital maintenance component for the clutch actuation system, ensuring consistent pressure and smooth engagement. By replacing worn internal elements, technicians can restore the hydraulic or pneumatic efficiency of the clutch servo without replacing the entire unit.

Compatible Volvo FH models and engines

This specific kit is compatible with Volvo FH (FH4/FH5) trucks, including various engine configurations such as the D11K. It is also fitted to Volvo FH models with engine outputs including 400, 420, 440, 460, 480, 500, 520, and 540. These parts are essential for maintaining heavy commercial vehicle performance.

Installation and maintenance guidance

For optimal results, workshop technicians should inspect the cylinder bore and piston surface during installation. If the piston surface shows scoring, a complete kit including the piston and spring is recommended over a standard sealing kit. Proper installation ensures the correct engagement of the clutch fork or release bearing.

Troubleshooting and selection

Regular inspection of the seals and dust boots can prevent air or fluid contamination within the clutch servo system. Maintaining these components helps prevent premature wear of the primary clutch assembly.

OE cross-reference

306.01.0012.03 (Clutch Servo Repair Kit) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21710522S3.