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HOWO Hand brake valve WG9000360522 for HOWO 420hp cabin spare parts.
The hand brake valve is WABCO brand,not only for HOWO truck but also Shacman dump truck.
FUNCTION
1. Parking Brake Control (Parking Handbrake): By pulling the handle, the supply of compressed air to the rear axle spring brake chamber is cut off/restored. When the handle is pulled, the air supply is cut off, and the spring force in the spring chamber automatically locks the wheels, achieving a reliable stop for the vehicle; when the handle is released, the air supply is restored, releasing the brake.
2. Preventing Vehicle Rollover: Provides reliable mechanical braking force when parking on a slope, parking for extended periods, or when a trailer is attached, ensuring the vehicle remains stationary and preventing rollover accidents.
3. Emergency/Auxiliary Braking: In the event of failure of the main service brake system, the handbrake valve can serve as a backup braking method. Pulling the handle provides emergency braking force to help the vehicle safely decelerate or stop.
4. Trailer Control Function: For tractor units, the handbrake valve is typically designed with a dual-circuit or three-port structure, with an air supply port, an output to the rear axle air chamber, and an output to the trailer control valve. It can simultaneously control the parking brakes of both the tractor unit and the trailer, ensuring the safe parking of the entire vehicle group.
4. Quick response and safe release: When the handle is released, the valve quickly releases gas and the brake is quickly released; some models have a progressive or locking design to prevent sudden release from causing the vehicle to move abruptly.
Advantages:
Featuring WABCO technology compatibility, its response speed, sealing performance, pressure resistance, and temperature range are essentially on par with the original equipment. The lever brakes quickly, vents air cleanly, has a low leakage rate, and a service life of 3–5 years or 300,000–500,000 kilometers (depending on road conditions).
DETAILS
| DESCRIPTION | Hand Brake Valve | PART NUMBER | WG9000360522 |
| WEIGHT |
0.5KG |
VOLUME |
18 × 13 × 8 cm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | ENGINE |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | CABIN |
Maintenance Schedule (Recommended Reference) for WG9000360522 (Hand Brake Valve)
| Maintenance Item | Recommended Interval | Operation Content & Standards |
|---|---|---|
| Daily Visual + Operation Inspection | Before each departure / Daily | Check the valve body and handle for any hissing sounds, oil traces, or corrosion; pull/release the handle multiple times to feel if it operates smoothly, without sticking or abnormal resistance |
| Leakage Test | Every 5,000–10,000 km | Pull the hand brake to maintain braking position, apply soapy water to all ports and exhaust outlet of the valve body, observe for bubbles; release and listen for crisp exhaust sound |
| Brake Performance Road Test | Every 10,000 km | Test on a slope to confirm reliable locking when hand brake is applied; check if the vehicle moves immediately after release; verify no vehicle rolling/sliding |
| Air System Drainage | Weekly or every 5,000 km | Open the air reservoir drain valve to release accumulated water and oil (to prevent contaminants from entering the hand brake valve causing sticking) |
| Comprehensive Inspection (incl. handle/linkage) | Every 20,000–30,000 km | Check handle free play, valve core sealing, internal spring/seal wear; inspect mounting bolts for looseness |
| Preventive Replacement | 300,000–500,000 km or 3–5 years | Replace the entire valve proactively regardless of failure (internal seals age irreversibly), especially during brake system overhaul or when leakage/sticking is detected |
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