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8L-4171 Magnetic Speed Sensor for Caterpillar
8L-4171 low-output magnetic speed sensor for selected Caterpillar engine, generator, and powertrain applications. This passive two-pin sensor generates an AC signal without an external power supply. Check the thread configuration and equipment compatibility before ordering. Contact RJT PARTS for B2B quotations.
Product Overview
The 8L-4171 magnetic speed sensor is used in selected Caterpillar engine, generator, and powertrain applications. It detects the movement of a rotating target and produces an AC signal related to its speed.
This is a passive, low-output sensor with a two-pin connection. It does not need an external power supply. Common applications include crankshaft speed, engine timing, and transmission speed monitoring.
RJT PARTS supplies aftermarket replacement parts for heavy equipment and diesel engines. If you are sourcing this sensor for maintenance or resale, check the thread size and installation details against the original part. You can also browse our [Caterpillar Sensors & Switches] category or view our [183-8597 / 290-5792 magnetic speed sensor] for another CAT speed sensor reference.
For further reference, check the official [Caterpillar 8L-4171 parts listing] and confirm the correct part for your equipment before ordering. If you are unsure about compatibility, send us the engine model, equipment details, and a photo of the original sensor.
Technical Specifications
Item | Specification |
|---|---|
Product Name | Magnetic Speed Sensor |
Part Number | 8L-4171 |
Brand Reference | Caterpillar (CAT) |
Sensor Type | Passive Magnetic Speed Sensor |
Output Type | Low Output |
Connector | 2-pin |
Housing Material | Stainless Steel |
Thread Reference | 5/8-18 UNF / 5/8-24, verify original configuration |
Signal Type | AC signal |
External Power Supply | Not required |
Product Type | Aftermarket Replacement Part |
Compatibility | Confirm by part number and equipment configuration |
Product Applications
The 8L-4171 magnetic speed sensor appears in Caterpillar parts listings for selected engine, generator, industrial, and marine applications.
Examples include:
- Diesel Engines: Selected CAT 3406, 3408, 3412, 3508, and 3512 engine applications
- Generator Sets: Selected G3306, G3508, G3512, and G3516 applications
- Industrial Engines: Selected D-series and G-series engine applications
- Marine Engines: Selected CAT 3612 and 3616 applications
- Generators: Selected SR4 and SR4B applications
These are examples from the parts listing, not a complete fitment list. The correct sensor depends on the engine or equipment configuration. Check the original part number and installation dimensions before ordering.
Product Features
- Passive Magnetic Design: Generates an AC signal without an external power supply.
- Low-Output Signal: Designed for applications that use a low-output magnetic speed sensor.
- Two-Pin Connection: Check the connector against the original part before installation.
- Metal Housing: The official listing identifies stainless steel as the material.
- Multiple Engine Applications: Listed for selected Caterpillar engine, generator, and powertrain systems.
- Part Number Identification: Use 8L-4171 to start your compatibility check.
Caterpillar does not recommend this low-output sensor for applications below 100 rpm. Confirm that the sensor type matches the requirements of the original system.
Why Choose RJT PARTS?
Aftermarket Parts for Heavy Equipment
RJT PARTS supplies replacement parts for heavy equipment and diesel engine applications.
Part Number-Based Support
Send us the part number, engine model, or a photo of the original sensor. This helps us check the product details before you order.
Support for B2B Buyers
We work with parts distributors, wholesalers, repair workshops, and equipment maintenance businesses.
Quotations for Your Parts List
Need several sensors or a mixed order of engine parts? Send us your part numbers and required quantities. We can review your request and provide a quotation based on availability.
Looking for an 8L-4171 Magnetic Speed Sensor?
Need an 8L-4171 speed sensor for a Caterpillar engine or generator set?
Send RJT PARTS the part number, engine model, equipment details, and required quantity. If possible, include a photo of the original sensor and its threaded end so we can check the configuration.
If you are sourcing several engine or electrical parts, you can also send us your full parts list.
Contact us for a quotation and compatibility check. We welcome inquiries from parts distributors, wholesalers, and repair businesses.
