21710522 S1 Clutch Servo Repair Kit for Volvo FH

What does a clutch servo repair kit do?

This clutch servo repair kit is engineered to renew the sealing elements that wear out most often in the clutch hydraulic circuit, helping to restore actuation to its original performance. By replacing worn seals and components, technicians can ensure reliable engagement and disengagement of the clutch system under heavy-duty operating conditions.

Vehicle and engine compatibility

This kit is specifically designed for Volvo FH (FH4/FH5) models equipped with D13K engines, including variants such as the 400, 420, 440, 460, 480, 500, 520, and 540 series. It serves as an efficient solution for maintaining these heavy commercial vehicles.

Installation and maintenance guidance

When performing installation, workshop technicians should verify the cylinder type and seal orientation to ensure a proper fit. It is essential to follow correct lubrication and bleeding steps during the assembly process to prevent air from entering the hydraulic lines. For cylinders where the piston surface shows significant wear, a complete unit replacement may be required.

Maintenance and system health

Maintaining the clutch servo ensures smooth gear transitions and prevents premature wear on other drivetrain components. Consult your authorized distributor.

OE cross-reference

306.01.0012.01 (Clutch Servo Repair Kit) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21710522S1.