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SINOTRUK HOWO TRUCK SPARE PARTS Pressure Switch WG9100710003
FUNCTION
1. Pressure Monitoring and Signal Conversion: Real-time monitoring of pressure within the rear axle or pneumatic system; when the pressure reaches a preset threshold, the device automatically closes or opens an electrical circuit to output an electrical signal.
2. Differential Lock Control: Primarily used to engage or disengage the rear axle differential lock. When rear axle locking is required, the pressure switch detects changes in air pressure and actuates a solenoid valve or actuator, thereby enhancing the vehicle's passability and traction in muddy, slippery, or off-road conditions.
3. Pneumatic System Auxiliary Control: Participates in the logic control of inter-axle locks, pneumatic warning systems, or other related pneumatic components, ensuring the safe operation of the vehicle.
Working Principle
Internally, the device features a diaphragm or spring-based sensing mechanism; when the system's pneumatic or hydraulic pressure reaches a preset value, it actuates the electrical contacts (either normally open or normally closed), thereby closing a 24V circuit to trigger a dashboard indicator light, a solenoid valve, or a control module.
Installation Location
It is mounted on the rear axle housing.
Specifically, it is located near the side or bottom of the rear axle housing on the STR rear drive axle-typically in close proximity to the differential lock cylinder or the pneumatic line connection port.
It features a threaded installation, screwing directly into a dedicated threaded bore on the rear axle housing and sealed by means of a sealing washer (Q72318T5F).
Performance Advantages
| Advantage Category | Specific Performance Advantages | Practical Benefits |
|---|---|---|
| Precise Control | Real-time monitoring of rear axle air pressure, sensitive response, precise control of differential lock operation | Fast differential lock engagement/disengagement, improved traction and passability in complex road conditions |
| Durability | OEM original brass/corrosion-resistant material, high pressure resistant, vibration resistant, corrosion resistant | Long service life (tens of thousands of kilometers), suitable for heavy-duty harsh conditions |
| Safety | Automatically triggers alarm or protection when pressure is abnormal, meets safety standards | Reduces slipping and sideslip risks, enhances overall vehicle driving safety |
| Structure & Maintenance | Pure mechanical/electrical contact structure, simple and reliable, no complex electronic components | Low failure rate, easy diagnosis, quick replacement, low maintenance cost |
| Economy & Compatibility | Low price (1-3 USD), perfect match with HOWO/STEYR original vehicle | High cost-performance, no modification needed, direct replacement |
| Overall Vehicle Improvement | Optimizes rear axle power distribution, reduces air pressure loss | Improves heavy-load starting and climbing ability, indirectly reduces fuel consumption |
DETAILS
| DESCRIPTION | Pressure Switch | PART NUMBER | WG9100710003 |
| WEIGHT |
0.08KG |
VOLUME |
5 × 5 × 3 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 | CHASSIS |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
Daily Maintenance Recommendations
| Maintenance Item | Recommended Interval | Specific Operations |
|---|---|---|
| Exterior Inspection & Cleaning | Every 5,000 km or monthly | Clean dust, oil stains from switch surface; check for cracks or corrosion |
| Air Pressure System Leak Check | Every 5,000 km | Check for air leaks at switch connections and surrounding pipelines (use soapy water or listen for sound) |
| Sealing Ring Condition Check | Every 10,000 km | Inspect or replace sealing ring (Q72318T5F) |
| Differential Lock Function Test | Every 10,000 km or quarterly | Test differential lock engagement/disengagement at low speed; check if dashboard indicator light works properly |
| Overall Air Pressure System Check | Every 20,000 km | Check air dryer, pressure valves, and pipelines to prevent contamination from affecting the switch |
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