Huatong lists air-suspension seat height valves and pneumatic transmission support parts for commercial vehicles. The seat valve is selected by the original equipment reference and seat assembly. The shift-assist products are selected against the particular gearbox and its pneumatic arrangement.
Models and selection data
| Model or series | Published configuration or function | Selection details |
|---|---|---|
| WG1662512139 | Air-suspension seat height control valve | Listed for the manufacturer’s Sinotruk seat applications. Match original equipment reference and port layout. |
| WG1662511133 | Seat height control valve reference | Compare seat model, mounting interface and control movement. |
| WG1662512787 | Seat height control valve reference | Confirm exact compatibility from the existing part and vehicle documentation. |
| Transmission shift-assist cylinder | Pneumatic actuator for manual shift assistance | Provide gearbox model, original part identification, mounting dimensions and linkage geometry. |
| High/low range directional valve and exhaust valve | Transmission circuit components | Provide original valve identification and the port and mounting arrangement. |
Seat circuit fit
The manufacturer lists applications including HOWO A7, T7H and SITRAK C7. A vehicle series may use several seat assemblies. Verify the actual seat and valve reference along with connection sizes, actuator travel and lever orientation.
Transmission fit
Compare the linkage geometry and cylinder travel against the gearbox assembly. Identify which device assists lever effort and which switches the range circuit. Include the old label and photographs of the mounting and ports when ordering a replacement.