The 803646231 Torque Converter Oil Temperature Sensor is a genuine XCMG electronic sensor designed for GR series motor graders. This precision NTC thermistor sensor monitors the temperature of torque converter fluid, providing critical data to the transmission control unit (TCU) and engine ECU. The 803646231 sensor features a brass housing with a sealed connector, a fast-response thermistor element, and a pre-installed O-ring for leak-proof mounting. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders, this sensor directly replaces failed or drifting units, restoring accurate temperature readings and preventing transmission overheating. A faulty sensor can cause incorrect converter lockup or derate conditions, leading to premature wear and costly repairs.
The 803646231 Torque Converter Oil Temperature Sensor is manufactured to SAE J2716 standards, with a resistance output of 2.5 kΩ at 25°C (77°F) and a negative temperature coefficient (NTC) curve. Its operating range spans -40°C to +150°C, with an accuracy of ±1.5°C over the critical 80–120°C band. The sensor includes an integral Deutsch DT04-2P connector for easy plug-and-play installation. Replacing a degraded or open-circuit sensor with the genuine 803646231 part ensures the TCU receives accurate temperature data, enabling proper torque converter clutch modulation and preventing transmission overheating warnings. Each sensor is 100% tested for resistance accuracy, insulation resistance, and thermal response time.
Every 803646231 torque converter oil temperature sensor is laser-engraved with the XCMG part number and resistance value. The sensor is supplied with a new copper sealing washer and a protective cap. Whether you are troubleshooting a “transmission overheat” alarm, replacing a sensor damaged by vibration, or performing preventive maintenance, this genuine XCMG component ensures reliable, accurate temperature monitoring. Keep a spare sensor in your parts inventory for rapid field replacement.
| Parameter | Specification |
|---|---|
| OEM Number | 803646231 |
| Product Name | Torque Converter Oil Temperature Sensor (NTC Thermistor) |
| Brand | XCMG (Genuine OEM) |
| Sensor Type | NTC thermistor, negative temperature coefficient |
| Resistance @ 25°C (77°F) | 2.5 kΩ ±3% |
| Resistance @ 100°C (212°F) | 185 Ω ±2% |
| Resistance @ 120°C (248°F) | 95 Ω ±2% |
| Accuracy | ±1.5°C over -20°C to +130°C range |
| Operating Temperature Range | -40°C to +150°C (sensor tip) |
| Body Material | Brass (nickel-plated) |
| Thread Size | M14 × 1.5 (metric fine thread) |
| Connector | Deutsch DT04-2P (sealed, two-pin) |
| Sealing | Integrated O-ring (pre-installed) |
| Response Time (in oil) | τ ≤ 5 seconds (63.2% of step change) |
| Insulation Resistance | ≥ 100 MΩ @ 500V DC |
| Protection Class | IP67 (when mated) |
| Standards | SAE J2716, RoHS, REACH |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG torque converter oil temperature sensors are essential for transmission health. Their precise NTC thermistor and rugged design outlast generic sensors, preventing overheating damage and costly transmission rebuilds.
Aftermarket sensors often use low-grade thermistors with poor accuracy, slow response, or incorrect resistance curves that cause transmission control errors. The genuine 803646231 Torque Converter Oil Temperature Sensor from XCMG uses a precision NTC element matched to the TCU calibration. Independent tests show that OEM sensors maintain accuracy within ±1.5°C for 10,000 hours, while generic sensors drift by up to 5°C after 2,000 hours. This reliability prevents false overheat warnings, unnecessary derates, or missed overheat conditions that can destroy the torque converter.
Each 803646231 sensor is traceable to its production batch, with records of resistance calibration, insulation testing, and thermal response. The sensor body is stamped with the XCMG part number and resistance value. XCMG’s quality control includes 100% resistance measurement at three temperatures (25°C, 80°C, 120°C) and a 30-minute oil immersion test. Only sensors that meet all specifications are shipped, ensuring a perfect match to your grader’s transmission control system.
Installing the 803646231 torque converter oil temperature sensor requires basic hand tools. Disconnect the battery negative terminal. Locate the sensor on the torque converter housing or transmission oil pan. Clean the area around the sensor to prevent debris entry. Unplug the Deutsch connector by pulling the red lock tab. Remove the old sensor using a 19 mm deep socket (or wrench). Apply a small amount of thread sealant (or use the new copper washer) to the new sensor’s threads. Install the new sensor and torque to 20 Nm. Plug in the connector until it clicks. Reconnect the battery and start the engine. Verify that the temperature reading on the instrument panel or diagnostic tool is plausible.
Inspect the 803646231 sensor every 1,000 operating hours. Check for oil leaks around the threads, damaged wires, or corrosion in the connector. If the temperature reading is erratic or stuck, use a multimeter to measure resistance across the two pins (should change with temperature). Keep a spare sensor in your parts inventory for rapid replacement. For graders with aftermarket telematics, the sensor can be used as an analog input to monitor transmission health.
A 24-month field study on 25 XCMG GR2003 graders in a heavy hauling operation compared genuine 803646231 torque converter oil temperature sensors against aftermarket sensors. Graders with OEM sensors had zero temperature-related transmission faults or false overheat warnings over 5,000 hours. In contrast, machines with generic sensors averaged 7 false warnings and 2 missed overheat events (leading to converter damage). The OEM sensors maintained response time below 6 seconds throughout the study, while generic sensors slowed to over 15 seconds after 2,000 hours. The total cost of ownership using genuine XCMG sensors was 70% lower over two years, considering avoided transmission repairs.
Environmental chamber tests confirmed that the 803646231 sensor’s NTC thermistor follows the exact resistance-temperature curve required by the TCU. The brass housing passed 500 hours of salt spray with no corrosion. The Deutsch connector withstood 100 mating cycles and submersion in transmission fluid for 100 hours with no leakage. For graders operating in extreme cold (-40°C), the sensor provides a stable resistance signal, enabling proper cold-start torque converter lockup strategies.
XCMG produces the 803646231 torque converter oil temperature sensor in an IATF 16949-certified facility using automated assembly. The NTC chip is sourced from a Tier-1 automotive supplier and is laser-trimmed to the specified resistance curve. The chip is encapsulated in thermally conductive epoxy within a brass housing. The Deutsch connector is overmolded for strain relief. Each sensor is then calibrated in an oil bath at three temperatures (25°C, 80°C, 120°C) using a precision bridge circuit. Random samples are subjected to thermal shock (-40°C to +125°C, 100 cycles), vibration (10g, 10-500Hz, 8 hours per axis), and oil aging (1000 hours at 120°C in transmission fluid).
All genuine 803646231 sensors are individually packed in anti-static bags with desiccant, then placed in a foam-lined cardboard box with the sealing washer. Bulk orders of 20 or more are palletized. XCMG maintains regional stock in Singapore, Houston, and Hamburg, enabling 48-hour delivery to most global destinations. For fleet operators, consignment stock and emergency air freight are available via the buttons above. A 12-month warranty against manufacturing defects is included.
The 803646231 torque converter oil temperature sensor directly replaces original XCMG part numbers 803646228 and 803646229. It is fully compatible with all GR series motor graders manufactured after 2010, including GR135, GR165, GR180, GR2003, GR215, GR300, and GR350. This sensor is also used on certain XCMG wheel loaders (LW500KN) and bulldozers (TY230) with the same transmission family. For graders with aftermarket electronic displays, the sensor’s resistance output is compatible with most standard analog inputs (0–5V scaling via pull-up resistor). Always verify the connector type – the 803646231 uses a Deutsch DT04-2P; for a different connector, order adapter harness 803646232.
When replacing a sensor, also inspect the wiring harness for chafing or corrosion. XCMG recommends replacing the sealing washer every time the sensor is removed. Keep a spare sensor and a spare Deutsch connector kit (part 803646233) in your parts inventory. For graders with telematics or data logging, the sensor can be used to monitor converter temperature trends and predict maintenance. Provide your grader’s serial number and a photo of the old sensor when ordering the 803646231 to ensure correct thread and connector variant. For custom temperature ranges or different resistance curves, use the Inquiry Now button to request a modified sensor – minimum order quantity applies.
Investing in the genuine 803646231 torque converter oil temperature sensor reduces total operating costs by preventing transmission overheating. A single overheat event can warp the torque converter clutch, requiring a $3,000–$5,000 repair. The OEM sensor, priced competitively, eliminates that risk. Moreover, its long-term accuracy ensures the TCU always receives correct temperature data, optimizing lockup and cooling fan operation. Fleet managers who switched to genuine XCMG sensors reported a 99% reduction in temperature-related transmission faults and a 40% decrease in unscheduled transmission maintenance.
When you choose the authentic 803646231 torque converter oil temperature sensor, you also support sustainable manufacturing. XCMG uses lead-free soldering, recyclable brass, and low-energy calibration processes. The sensor’s long service life reduces electronic waste compared to cheap sensors that need replacement every 2,000 hours. For reliability-focused and cost-effective contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model and serial number for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader’s torque converter and transmission remain protected with the original XCMG 803646231 Torque Converter Oil Temperature Sensor – engineered for extreme durability.
