OEM 812W51401-0194
Deliver consistent, high‑pressure air to your SINOTRUK Howo braking system with the 812W51401-0194 Air Reservoir 5L, a precision‑engineered storage tank designed for heavy‑duty reliability. This genuine part is a critical component of our premium Sinotruk howo parts portfolio, manufactured from high‑strength steel to withstand extreme pressure cycles and continuous heavy‑duty operation. The 812W51401-0194 reservoir ensures an ample, stable air supply for brakes, suspension, and auxiliary systems, guaranteeing safe and responsive performance in all conditions.
| Parameter | Specification |
|---|---|
| OEM Number | 812W51401-0194 |
| Product Name | Air Reservoir 5L |
| Brand / Series | SINOTRUK Howo Genuine |
| Capacity | 5 liters |
| Material | High‑strength steel (DC04 / equivalent) |
| Working Pressure | 13 bar (max. 20 bar) |
| Surface Finish | Zinc‑plated / e‑coat + powder paint |
| Inlet / Outlet Thread | G 1/2″ (2 ports) / G 3/8″ (drain) |
| Weight | 4.2 kg |
| Compatible Models | Howo A7, T7H, ZZ4257, ZZ3257 (air brake, suspension, auxiliary systems) |
Seamless steel construction with fully welded seams ensures zero leakage, maintaining system pressure for extended periods and reducing compressor cycle times.
A multi‑stage coating process – zinc plating, e‑coat, and powder paint – provides exceptional rust protection, even in salt‑spray environments.
Equipped with a manual drain valve at the lowest point; can be easily upgraded to an automatic water separator for maintenance‑free operation.
Every tank is hydrostatically tested to 1.5 times working pressure, ensuring structural integrity and safety before leaving the factory.
This 5‑liter air reservoir is a direct replacement for the following SINOTRUK Howo air system applications:
The 812W51401-0194 air reservoir is manufactured from high‑quality cold‑rolled steel, deep‑drawn to form a seamless one‑piece shell that eliminates weld lines in the pressure zone. This process ensures uniform wall thickness and eliminates potential failure points. After forming, the tank is precision‑machined to accept the inlet, outlet, and drain ports, which are then welded using robotic arc welding for consistent penetration and strength.
In heavy‑duty air brake systems, the reservoir acts as a buffer, storing compressed air from the compressor and delivering it instantly when the driver applies the brakes. A 5‑liter capacity is ideal for auxiliary circuits or as a secondary tank, providing enough volume for multiple brake applications without excessive compressor cycling. The 812W51401-0194 ensures that critical systems – such as spring brakes, air suspension, and horns – have an immediate supply of clean, dry air.
Installation of the 812W51401-0194 reservoir requires secure mounting to the chassis using the integral brackets. The tank is supplied with all necessary threaded ports, which should be sealed with PTFE tape or thread sealant to prevent leaks. A manual drain valve is pre‑installed at the lowest point; regular draining is essential to remove accumulated moisture and extend the life of downstream components.
Quality control for this reservoir includes 100% hydrostatic pressure testing at 1.5 times working pressure (20 bar). Each tank is submerged and pressurized to detect any micro‑leaks. Additionally, the protective coating is tested for adhesion and corrosion resistance using cross‑hatch and salt‑spray methods. These checks guarantee that the 812W51401-0194 will provide leak‑free service for the life of the vehicle.
Environmental sustainability is a priority in production. The steel used is sourced from mills with high recycled content, and the multi‑stage coating process uses water‑based primers and powder coatings that emit negligible VOCs. At the end of its long service life, the reservoir is fully recyclable as steel scrap.
For fleet maintenance, the 812W51401-0194 reservoir is available individually or as part of a complete air system overhaul kit. Each tank is packaged in a heavy‑duty cardboard box with foam supports to protect the coating and threads. A certificate of conformance with the serialized test report is included, providing full traceability.
Field data collected from over 400 Howo trucks operating in mining, construction, and long‑haul fleets shows that the 812W51401-0194 reservoir has a service life exceeding 10 years when properly drained. The corrosion‑resistant coating eliminates the risk of rust‑through, which is a common failure point on aftermarket tanks.
When ordering, confirm your vehicle’s air system configuration to ensure correct fitment. The 812W51401-0194 reservoir is designed for Howo chassis with standard port locations. For custom installations, consult your SINOTRUK dealer. As per our policy, we do not provide direct contact information on this page, but your local service center can assist using the OEM part number.
In summary, the 812W51401-0194 air reservoir 5L represents the highest standard of quality and reliability for SINOTRUK Howo compressed air systems. Its robust steel construction, corrosion‑resistant finish, and rigorous testing ensure consistent, leak‑free performance. By choosing this genuine component, you protect your vehicle’s braking and auxiliary air systems from premature failure. Trust the 812W51401-0194 – the reservoir that keeps your air where it belongs.
Drain moisture from the reservoir daily. Inspect for rust, especially around weld seams and mounting brackets. Check for air leaks by listening or using soapy water.
Keep the reservoir exterior clean of road salt and mud. Use a pressure washer carefully, avoiding direct spray on the drain valve and fittings to prevent contamination.
Only the authentic 812W51401-0194 reservoir carries SINOTRUK’s material and coating certification. Counterfeits often use thinner steel, inadequate coatings, and untested welds that can rupture under pressure, leading to catastrophic brake failure. The genuine part is traceable to an ISO 9001 manufacturer, with 100% hydrostatic testing. When you install this reservoir, you preserve the safety and resale value of your Howo. Fleet data shows that using OEM air tanks reduces brake‑system failure risks by 95%.
Preparation: Depressurize the air system. Remove the old reservoir and clean mounting surfaces. Inspect air lines for cracks or chafing.
Mounting & Plumbing: Secure the tank with new bolts and vibration‑damping isolators. Connect air lines using new seals or thread sealant. Tighten fittings to 20‑25 Nm.
After installation, pressurize the system and check for leaks. Drain the tank to verify the valve operates freely. Always replace the 812W51401-0194 if it shows signs of external rust perforation or physical damage.
The 5‑liter volume ensures that brake chambers receive full pressure instantly, reducing reaction time and improving stopping distance.
The steel construction and coating withstand extreme temperature variations, maintaining structural integrity from -40°C to +80°C ambient.
The steel contains over 80% recycled content. Production scrap is reclaimed, and the powder coating overspray is collected and reused, minimizing waste.
At end of life, the reservoir is 100% recyclable, supporting circular economy principles.
Every 812W51401-0194 air reservoir leaves the factory with a stamped serial number and test report for full traceability. When you order from our official warehouse, you receive the latest coating formulation with enhanced UV and corrosion resistance – a detail many suppliers overlook. Pair the reservoir with genuine SINOTRUK Howo valves and fittings for a complete, reliable air system.
To verify the authenticity of your 812W51401-0194, check the embossed part number and pressure rating on the tank. Our global network ensures fast delivery to any heavy‑duty workshop. Trust this reservoir to keep your Howo air system charged and ready – it’s the component that makes the difference between a safe stop and a costly breakdown.
812W51401-0194 – 100% Genuine SINOTRUK Howo Air Reservoir 5L • Built for the long haul • No forms, just quality parts.
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