Wabco 4728809312 Repair Kit

Description

This Wabco repair kit (MPN 4728809312) is designed for use in air brake systems, specifically air valves. It ensures reliable operation and longevity of the braking system. This kit adheres to OE specifications, guaranteeing a precise fit and optimal performance. It measures 175 x 30 x 220 mm and features cable ends compliant with Bayonet plug ISO 15170-B1-3.2-Sn/K1 4-pin and Bayonet socket ISO 15170-B1-3.3- Sn/K1 4-pin standards.

Key Features & Benefits

This kit basically gives you all the seals, O – rings, and sometimes small springs and clips needed to rebuild the air control valve itself. The valve controls the flow of compressed air to the brake chambers, telling your brakes when to apply and release. It handles things like service brakes—when you push the pedal—and the spring brakes, which are automatically applied if you lose air pressure. A kit doesn’t give you a whole new valve, just the parts to refresh the one you’ve got. Think of the air control valve as the brain of your air brake system. It receives signals from the brake pedal and the driver’s controls, and then directs the air to the brakes themselves. It's a critical component, especially on larger vehicles like trucks, buses, and trailers. Without a properly functioning valve, your brakes won't work reliably—or at all.

Symptoms, Risks & Replacements

Air brakes are serious business, and leaks in that system can be really dangerous. Over time, the seals and O – rings inside the air control valve get brittle, crack, and start letting air escape. That loss of air pressure affects your stopping power and can even lead to the spring brakes engaging unexpectedly. Replacing these worn parts with a repair kit restores the valve to full working order. You’ll notice if your brakes are taking longer to engage, or if you’re constantly having to refill your air system—those are usually signs the valve needs attention. You can often find these kits at places like Fixparts Online, and they're a lot more economical than replacing the entire valve assembly. It's just preventative maintenance, really, and keeping your brakes working correctly is the most important thing.

Warranty Information

Wabco Repair Kit (MPN 4728809312) comes with a 1-year warranty.