The genuine XCMG Pressure and Temperature Sensor with OEM number 800172740 is a combined sensing device engineered for XCMG articulated dump trucks and heavy hydraulic systems. This sensor simultaneously monitors hydraulic pressure and fluid temperature, transmitting both parameters via a single 4-pin Deutsch connector, enabling precise real-time control of cooling fans, pump stroke, and valve logic.
The XCMG Pressure and Temperature Sensor 800172740 consolidates two critical measurements into one compact housing. By knowing both pressure and temperature at the same point, the ECU can calculate oil viscosity, adjust pump displacement, and control cooling fan speed with unprecedented accuracy. This prevents thermal degradation of hydraulic fluid and reduces energy waste.
In AD-series dump trucks, this sensor is typically installed at the hydraulic tank or main pump outlet. Real-time data allows the controller to derate the system if oil temperature exceeds 110°C, avoiding seal failure and pump seizure. Field tests show a 30% reduction in hydraulic-related downtime when using this dual sensor versus separate pressure and temperature switches.
The pressure sensing element is a micromachined silicon piezoresistive die with a stainless steel diaphragm, offering excellent linearity and low hysteresis. The temperature element is a Pt1000 RTD (resistance temperature detector) embedded directly in the tip, ensuring fast thermal response. Both signals are amplified and conditioned internally, providing clean 0.5–4.5V outputs.
The sensor is factory calibrated over the full operating range, and the calibration coefficients are stored in an EEPROM. When connected to a CAN J1939 network (optional variant), the sensor transmits digital messages with both parameters, eliminating analog signal degradation over long wire runs.
The 800172740 sensor uses a standard M18×1.5 mounting thread with an O-ring boss, identical to many other XCMG pressure switches. It replaces two separate sensors (pressure switch + temperature thermistor) with one unit, simplifying harness design and reducing potential leak points. This is particularly beneficial for aftermarket retrofits on older trucks.
The 4-pin Deutsch connector uses standard pinout: pin A = ground, pin B = supply (24V), pin C = pressure output, pin D = temperature output. This matches the OEM configuration on all AD45–AD100 models, making replacement a direct plug-and-play operation.
To install the Pressure and Temperature Sensor 800172740, first relieve hydraulic system pressure and allow the oil to cool. Remove the existing plug or sensor using a 27 mm deep socket. Clean the port threads and inspect the sealing face for burrs. Lubricate the new O-ring with clean hydraulic oil, then hand-tighten until the O-ring seats. Torque to 35 Nm ± 5 Nm – do not over-torque.
Connect the Deutsch plug, ensuring the locking tab clicks. Power up the machine and use a multimeter or scan tool to verify the pressure output (typically 0.5V at 0 bar, 4.5V at 350 bar). For the temperature output, at 20°C the voltage should be approximately 1.2V (for a 0.5–4.5V scale). If readings are erratic, check the harness for chafing or corrosion, especially near the engine mount.
If the sensor is suspected of failure, compare its readings with a calibrated mechanical gauge and an infrared thermometer. Acceptable deviation is ±2% of full scale for pressure and ±2.5°C for temperature. Replace the sensor if out of tolerance. Clear any related DTCs (e.g., P0520, P0198) after replacement.
Non-genuine sensors often exhibit pressure output drift due to low-grade piezoresistive elements or poor thermal compensation. This can cause the ECU to misinterpret normal operating pressures as too high or too low, triggering unnecessary alarms or derates. Genuine XCMG 800172740 sensors are individually temperature-compensated and laser-trimmed.
Another common counterfeit issue is water ingress due to poor potting around the electrical pins. XCMG sensors are fully encapsulated and tested to IP69K, surviving direct high-pressure washdown. Always look for the XCMG part number laser-etched on the hex body and the holographic authentication sticker on the packaging.
By measuring both pressure and temperature simultaneously, the 800172740 sensor enables predictive maintenance algorithms. A gradual drop in pressure at the same temperature indicates pump wear or filter blockage. A sharp temperature rise at constant pressure suggests a failed cooler or low oil level. Operators receive early warnings, avoiding catastrophic failures.
Fleet studies show that installing this sensor reduces unscheduled hydraulic repairs by 55% and extends oil change intervals by 25% (using condition-based monitoring). The sensor’s ability to send accurate data also allows the fan drive to run only when needed, cutting fuel consumption by 2–3% on some machines. Payback period is typically under 6 months.
Every XCMG Pressure and Temperature Sensor 800172740 is manufactured under IATF 16949 and ISO 9001:2015 certified processes. Each unit undergoes 100% testing: 50 pressure cycles from 0 to 35 MPa, thermal shock from -40°C to +135°C, and EMC immunity testing (ISO 11452-2). XCMG provides a 24-month warranty against manufacturing defects.
Counterfeit sensors often omit the over-voltage protection and fail prematurely. Protect your hydraulic investment – insist on genuine XCMG components. The sensor’s stainless steel body and high-grade connector ensure years of reliable service in the harshest mining environments.
