The Caterpillar 165-6634 Coolant Level Sensor ( OE# 1656634 ) is a critical component for maintaining optimal engine performance across construction equipment, heavy-duty trucks, agricultural machinery, and commercial vehicles. Manufactured to Caterpillar's exacting standards, this sensor ensures precise monitoring of coolant levels in diesel engines.
Part Number: 165-6634 / 1656634
Compatibility: Cat® 320D/323D Excavators, C13/C15 Engines
Operating Voltage: 12V/24V DC Systems
Temperature Range: -40°C to 125°C
Sealing: IP67 Waterproof Design
Symptom: Repeated engine overheating alarms during operation
Diagnosis: Faulty coolant level sensor causing inaccurate readings
Solution: Replacement with genuine 165-6634 sensor restored proper monitoring
Symptom: Unexplained coolant loss without visible leaks
Diagnosis: Compromised sensor seal allowing vapor escape
Solution: Installed IP67-rated 1656634 sensor eliminated leakage
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| Seq | Product Name | Part Number | Brand |
|---|---|---|---|
| 1 | Hydraulic Cylinder Rear Suspension | 456-8724, 4568724 | CAT |
| 2 | Hydraulic Cylinder Rear Suspension | 107-2860, 1072860 | CAT |
| 3 | Lift Hydraulic Cylinder | 154-6907, 1546907 | CAT |
| 4 | Engine ECM Controller | 366-8822, 3668822 | CAT |
| 5 | Main Hydraulic Pump | 593-8367, 5938367 | CAT |
| 6 | Main Hydraulic Pump | 567-9721, 5679721 | CAT |
| 7 | Lift Hydraulic Cylinder | 129-1908, 1291908 | CAT |
| 8 | Lift Hydraulic Cylinder | 129-4259, 1294259 | CAT |
| 9 | Radiator Water Tank | 245-9359, 2459359 | CAT |
| 10 | Chassis Wiring Harness | 306-8797, 3068797 | CAT |
| 11 | Tilt Hydraulic Cylinder | 387-0613, 3870613 | CAT |
| 12 | Thumb Clamp Hydraulic Cylinder | 378-5574, 3785574 | CAT |
| 13 | Muffler Exhaust Pipe | 7E-3683, 7E3683 | CAT |
| 14 | Intake Pipe Turbocharger | 193-2839, 1932839 | CAT |
| 15 | Muffler Silencer | 437-0392, 4370392 | CAT |
| 16 | Muffler Silencer | 437-0390, 4370390 | CAT |
| 17 | Turbocharger | 366-2433, 3662433 | CAT |
| 18 | Turbocharger | 259-2158, 2592158 | CAT |
| 19 | Turbocharger | 566-8180, 5668180 | CAT |
| 20 | Turbocharger | 577-8677, 5778677 | CAT |
| 21 | Turbocharger | 382-7900, 3827900 | CAT |
| 22 | Turbocharger | 233-7494, 2337494 | CAT |
| 23 | Turbocharger | 188-5156, 1885156 | CAT |
| 24 | Turbocharger | 247-2964, 2472964 | CAT |
| 25 | Turbocharger | 205-6741, 2056741 | CAT |
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