125-2966 196-7973 Magnetic Speed Sensor for Caterpillar 320B 312B Excavator
Brand: Compatible with Caterpillar (CAT)
Part Number: 125-2966, 196-7973, 1252966, 1967973
Condition:Brand New (OEM Quality Standard)
Thread Size:M16 (Precision Threading)
$69.99
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Product Highlights
Overview
| Brand | Compatible with Caterpillar (CAT) |
|---|---|
| Part Number | 125-2966 |
| Thread Size | M16 (Precision Threading) |
Product Details
High-Precision 125-2966 Magnetic Speed Sensor (Tachometer) for Caterpillar Heavy Equipment
The 125-2966 (also recognized as 196-7973) Magnetic Speed Sensor is a critical electronic component designed to monitor the rotational speed of your engine’s flywheel or gears. Serving as a primary input for the Tachometer and Electronic Control Module (ECM), this sensor ensures your Caterpillar 320B excavator or 930K wheel loader operates within its optimal RPM range. Replacing a worn sensor with our New 125-2966 eliminates erratic RPM readings, engine stalling, and poor fuel economy.
I. Engineered for Durability & Accuracy
Heavy machinery operates in environments filled with dust and vibration. This speed sensor is built to exceed these industrial demands through precise magnetic induction:
- M16 Precision Threading: Engineered for a perfect fit into the housing, ensuring the sensor tip maintains the exact air gap required for a clean magnetic pulse.
- Heavy-Duty 2-Pin DT Connector: Features the industry-standard DT connection, known for superior resistance to moisture, dirt, and corrosion.
- 210mm Shielded Lead: The 8.3-inch wire is insulated with high-temperature resistant material, preventing the internal copper from becoming brittle under engine bay heat.
II. Comprehensive Compatibility: From B-Series to Modern Loaders
The 125-2966 sensor is a versatile part that bridges multiple generations of Caterpillar machinery:
| Classic Excavators | Standard replacement for 312B, 315B, 320B, 320B L, and 321B series. |
| Modern Wheel Loaders | Fully compatible with K-Series loaders including 924K and 930K. |
| Forestry & Specialized | Fits 315B FM L and 320B FM LL logging and industrial configurations. |
III. The Liuchuang Advantage: 12-Month Warranty
CRITICAL FITMENT STEP: ENSURE A PERFECT MATCH
To avoid project delays, we recommend a brief physical check before ordering:
- Visual Verification: Confirm your existing sensor utilizes the M16 thread and the 2-pin DT connector.
- Expert Double-Check: Simply send us your Model Number or VIN, and our technical team will verify the fitment against the CAT database.
- Warranty: Enjoy 12 months of coverage with full repair or replacement service for any functional issues.
IV. Why Source from Liuchuang Parts?
System Integrity
We treat electrical components as the “nervous system” of your gear. Our parts are factory-new to ensure zero signal degradation.
Professional Service
Our “Customer First” philosophy ensures expert technical support to keep your machinery on the job site and out of the shop.

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