| Parameter | Specification |
|---|---|
| COGENG Part Number | TS-KOM-2310 |
| Replaces OEM Number | 7861-93-2310 |
| Sensor Type | NTC Thermistor |
| Electrical Connection | OEM 2-pin Weatherproof Connector |
| Thread Size | M12 x 1.5mm |
| Temperature Range | -40°C to +140°C |
| Resistance Values | 5.79KΩ @ 20°C, 180Ω @ 100°C |
| Accuracy | ±1.5°C across operating range |
| Body Material | Brass with Zinc-Nickel Plating |
| Seal Type | Integrated Copper Crush Washer |
| Response Time | <8 seconds (63% of final value) |
| Quality Standard | ISO 9001 |
| NO | Number | Name | Qty |
| 1 | 708-7F-00030 | MOTOR ASS'Y | 1 |
| 2 | 01010-82050 | BOLT | 2 |
| 3 | 01643-32060 | WASHER | 2 |
| 4 | 07000-75165 | O-RING | 1 |
| 5 | 8298-70-1621 | FLANGE | 1 |
| 6 | 01252-71650 | BOLT | 6 |
| 7 | 01643-51645 | WASHER | 6 |
| 8 | 8298-70-1750 | SHAFT | 1 |
| 9 | 8298-70-1630 | FLANGE | 1 |
| 10 | 01010-81645 | BOLT | 6 |
| 11 | 01643-31645 | WASHER | 6 |
| 12 | 8298-70-1711 | COVER | 1 |
| 13 | 01010-81245 | BOLT | 6 |
| 14 | 01643-31232 | WASHER | 6 |
| 15 | 07000-75165 | O-RING | 1 |
| 16 | 8298-70-2410 | HOLDER | 1 |
| 17 | 8298-70-2420 | SHAFT | 1 |
| 18 | 8298-70-2430 | PLATE | 1 |
| 19 | 01010-81035 | BOLT | 4 |
| 20 | 01643-31032 | WASHER | 4 |
| 21 | 705-43-01080 | PUMP ASS'Y | 1 |
| 22 | 01010-81030 | BOLT | 2 |
| 23 | 01643-31032 | WASHER | 2 |
| 24 | 07000-72055 | O-RING | 1 |
| 25 | 8298-70-1610 | SHAFT | 1 |
| 26 | 8298-70-1640 | RETAINER | 2 |
| 27 | 01010-81030 | BOLT | 12 |
| 28 | 01643-31032 | WASHER | 12 |
| 29 | 07000-75170 | O-RING | 2 |
| 30 | 07012-70110 | SEAL | 2 |
| 31 | 8298-70-2470 | SEAL | 2 |
| 32 | 07043-70108 | PLUG | 2 |
| 33 | 7861-93-2310 | SENSOR | 1 |
| 08192-22100 | • CONNECTOR | 1 | |
| 08191-05520 | • PIN CONTACT | 2 | |
| 08192-22300 | • WEDGE | 1 | |
| 34 | 8298-70-1850 | BEARING | 2 |
| 35 | 8298-70-1660 | SHAFT | 4 |
| 36 | 8287-70-2390 | PLATE | 8 |
| 37 | 01010-81230 | BOLT | 16 |
| 38 | 01643-31232 | WASHER | 16 |
Safety Precautions:
Allow engine to cool completely before installation
Depressurize cooling system by slowly opening radiator cap
Drain small amount of coolant to prevent spillage
Disconnect battery to prevent electrical hazards
Installation Procedure:
Locate sensor in engine cooling passage
Disconnect electrical connector
Carefully unscrew old sensor using deep socket
Clean threads in engine mounting port
Install new COGENG sensor with integrated copper washer
Torque to 15-20 Nm (11-15 ft-lbs)
Reconnect electrical connector securely
Refill coolant and bleed air from system
Start engine and check for leaks
Verify proper temperature gauge operation
Q: What Komatsu models use the 7861-93-2310 engine coolant temperature sensor?
A: The COGENG 7861-93-2310 premium engine coolant temperature sensor is a direct OEM replacement designed for Komatsu large excavator models including PC600, PC650, PC700, PC800, and PC850 series. It may also be compatible with other Komatsu heavy equipment where this sensor part number is specified. Always verify this part number against your machine's parts manual or the original sensor's identification markings to confirm exact compatibility before ordering.
Q: What are the symptoms of a failing engine coolant temperature sensor on a Komatsu large excavator?
A: Common symptoms include inaccurate or erratic temperature gauge readings, false overheat warnings on the monitor panel, the engine cooling fan running constantly or failing to engage when needed, hard starting when cold or hot, poor fuel economy, black smoke from the exhaust, and the engine control unit defaulting to a failsafe mode. On large excavators like the PC600 through PC850 series, a faulty coolant temperature sensor can also cause unnecessary engine derating, significantly impacting productivity. Most critically, a failed sensor may not trigger overheat protection, potentially leading to severe engine damage.
