21710522 S2 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 critical sealing elements within the clutch hydraulic circuit. By replacing worn seals and O-rings, technicians can restore smooth and precise clutch actuation to original performance levels. Using high-strength components ensures the kit withstands the demanding pressure cycles found in heavy commercial vehicle systems.

Vehicle and engine compatibility

This specific kit is compatible with Volvo FH (FH4/FH5) trucks, including various engine configurations such as the D13K. It is also suitable for Volvo FH models including the 400, 420, 440, 460, 480, 500, and 540 variants. Proper fitment ensures the hydraulic pressure is maintained throughout the shifting cycle.

Installation and maintenance guidance

When performing installation, workshop technicians should carefully verify the cylinder type and seal orientation. It is essential to ensure the bore surface is free of scoring before assembly. Proper lubrication and bleeding of the hydraulic circuit are required to prevent air pockets that could lead to inconsistent clutch engagement.

Selection and replacement advice

If the cylinder bore shows significant wear or deep scoring, a complete servo unit replacement may be more effective than a seal kit. Always check the compatibility list to ensure this kit meets the specific requirements of the vehicle's clutch system.

OE cross-reference

306.01.0012.02 (Clutch Servo Repair Kit) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21710522S2.