HOWO T7H T5G SITRAK C7H Brake Master Valve WG9000360539 Air Brake System Parts

SINOTRUK HOWO Truck Air Brake System Parts T7 T5GBrake Master Valve / Foot Brake Valve WG9000360539

The WG9000360539 Brake Master Valve is the foot brake valve in a SINOTRUK HOWO heavy-truck air brake system — the driver steps on the pedal, and this valve turns that pedal travel into a controlled compressed-air signal for the service brake circuits, with a 12.5 bar pressure-limiting stage built into the circuit. From there, the signal goes to the relay valves and brake chambers, which is what actually applies the braking force at the wheels. It's a dual-circuit valve, so it feeds both braking circuits from the one pedal, and it sits in line with the air compressor, air dryer, reservoirs, relay valves, ABS components, and brake chambers as part of the whole air-brake network. In service, it gets worked hard — every brake application, loaded trailer run, highway haul, or site delivery cycles the pedal and the air pressure through it. When you're replacing one, don't pick it by looks: check the part number, how many circuits it has, the air-port layout, pressure spec and mounting arrangement, because the listings put WG9000360539 on the HOWO 7 Series, T7H, T5G and SITRAK C5H/C7H, and it's separated in the catalog from related master-brake-valve numbers like WG9000360531 — the wrong one won't line up or act right in the circuit.