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104137570001 Truck Parts Electronic Pressure Sensor for Sinotruk Howo WG9727710002

The WG9727710002 is a high-precision Electronic Air Pressure Sensor used in the pneumatic braking and air suspension systems of China National Heavy Duty Truck Group (SINOTRUK) heavy-duty trucks. It monitors real-time air pressure from the air reservoirs (tanks) and converts it into an electrical signal transmitted to the instrument cluster and ECU, enabling accurate display and safety monitoring of brake system performance.
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  •  WG9727710002

  • Sinotruk HOWO

Attribute Specification
Part Name Electronic Air Pressure Sensor / Air Pressure Transducer
OEM Part Number WG9727710002, also marked as WG9727710002/1
Voltage Rating 24V DC (standard for Chinese commercial vehicles)
Pressure Range 0 – 10 bar (standard)
Some variants: 0 – 12 bar
Output Signal Analog voltage output (typically 0.5–4.5V) proportional to pressure
Linear response with high repeatability
Pressure Interface Threaded port:
• M16×1.5 (common)
• M12×1.5 (some batches)
Electrical Connector 3-Pin sealed plug (IP67-rated), anti-reverse design to prevent incorrect mating
Sensing Element Ceramic piezoresistive pressure sensing chip — highly sensitive and stable
Body Material Copper or aluminum alloy pressure housing
Reinforced ABS plastic outer casing
Sealing Type NBR or FKM rubber O-ring at both air and electrical interfaces
Protection Level IP67 — Dust-tight and protected against temporary immersion (1m depth for 30 mins)
Operating Temperature Range -40°C to +105°C
Weight Approx. 0.08 kg – 0.15 kg
Mounting Style Direct thread-in or bracket-mounted via AZ9925720001-type holder
Quality Standards ISO9001, GB/T 30423 (automotive pressure sensor standard), compatible with WABCO system requirements
Warranty 3–12 months (depending on OEM or aftermarket source)
电子压力传感器-1

Name1

电子压力传感器-4

Name2

Installation Instructions

Due to its role in brake system diagnostics and safety, proper installation is essential.

✅ Pre-Installation Checks

  1. Depressurize Air System: Fully release all air pressure from the reservoirs before starting.

  2. Inspect Mounting Location: Clean the threaded port; remove rust, oil, or debris.

  3. Check New Unit: Ensure sealing ring is present and undamaged.

  4. Verify Compatibility: Confirm this sensor matches your system’s pressure range and connector type.

✅ Installation Steps

  1. Remove old sensor by unscrewing it counterclockwise (use correct wrench size).

  2. Apply thread sealant (if required) or install with new sealing washer/O-ring.

  3. Screw in the new WG9727710002 by hand first — avoid cross-threading.

  4. Tighten securely to manufacturer torque (~20–25 Nm). Do not overtighten.

  5. Connect the 3-pin electrical plug firmly until it clicks — ensure locking tab engages.

  6. Rebuild air pressure and observe instrument panel:

    • Pressure should rise smoothly

    • No “Low Air Pressure” warning after ~4 minutes

    • No erratic jumps or zero readings



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