306.01.0001.01 Repair Kit for Clutch Servo in MAN Trucks

What does a clutch servo repair kit do?

This clutch servo repair kit serves as a specialized service set designed to renew the sealing elements that wear out most often in a heavy commercial vehicle's clutch hydraulic circuit. By replacing the seals, O-rings, and dust boots, technicians can restore clutch actuation to its original performance. This is a highly economical solution for maintaining the slave cylinder when the cylinder bore remains within service limits.

Compatible vehicles and engines

This kit is engineered for compatibility with several heavy-duty models, including MAN Lion's Coach, Mercedes-Benz Axor 2, and MAN HOCL series. It is also fitted to Scania and DAF trucks. The components are designed to work effectively within systems compatible with WABCO or Provia architectures, ensuring precise mechanical motion during gear shifts.

Installation and maintenance

During installation, workshop technicians should verify the cylinder type—whether external or concentric—and ensure the seal orientation is correct. It is vital to check that the hydraulic fluid class matches the requirements of the new elastomers to prevent swelling or leakage. Proper lubrication and bleeding of the system are essential steps to prevent air from compromising the pressure required for smooth engagement.

Troubleshooting guidance

If symptoms like gear shifting difficulty or pedal sponginess persist after a seal replacement, it may indicate that the cylinder bore or piston surface is beyond service limits. In such cases, a complete unit replacement is recommended to ensure long-term system integrity.