303.02.0021.01 Repair Kit for Multi-circuit Protection Valves — Renault Trucks

What does a multi-circuit protection valve repair kit do?

This repair kit is engineered to restore the internal integrity of multi-circuit protection valves within the pneumatic brake system of heavy commercial vehicles. By providing high-strength components, it allows for the renewal of critical internal elements, ensuring that air pressure is correctly distributed and protected across multiple circuits.

Compatible vehicles and systems

These kits are compatible with Renault Trucks vehicles. They are specifically designed to work with protection valves that manage air distribution between service brakes, parking brakes, and auxiliary systems, ensuring that a leak in one circuit does not compromise the entire braking performance.

Maintenance and installation guidance

For workshop technicians performing maintenance, this kit provides a cost-effective solution to overhaul existing valves rather than replacing the entire unit. Proper installation ensures the diaphragm and seals are seated correctly to maintain optimal pressure regulation across all pneumatic lines.

Troubleshooting and system reliability

Regular inspection of these components during routine brake system servicing can prevent sudden loss of air pressure and ensure long-term operational safety for heavy-duty fleets.

OE cross-reference

303.02.0021.01 (Multi-circuit Protection Valve Repair Kit) is the equivalent of the Knorr-Bremse OE numbers. This part directly replaces Knorr-Bremse OE numbers AE4525S1, II37922S1.