Unlike generic inductive sensors, the COGENG RE519144 utilizes a digital Hall Effect integrated circuit (IC) architecture. This technology provides superior resistance to contamination from dust, debris, and non-ferromagnetic materials, which are common in heavy tillage and harvesting environments. The sensor is hermetically sealed to withstand thermal shock, high-pressure washdowns, and extreme vibration.
PRODUCT IDENTIFICATION
| Parameter | Specification |
|---|---|
| COGENG Part Number | RE519144 |
| OEM Equivalent | John Deere RE519144, RE508195 |
| Product Type | Revolution Speed Sensor / Crankshaft Position Sensor |
| Sensor Type | Magnetic pickup (variable reluctance) |
| Output Signal | AC voltage (frequency proportional to engine speed) |
| Application | Engine RPM monitoring / Crankshaft position |
| Connector Type | 2-pin Deutsch / AMP |
| Material | Plastic housing + Steel threaded base |
| Packing | PP bag inside, carton box outside |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Supply Capacity | 500 PCS |
Supply Voltage: 8 – 32 V DC (Regulated, compatible with 12V and 24V vehicle systems)
Output Type: Open Collector / NPN (Current sinking) – Digital Square Wave
Output Signal: High Side (Pull-up) resistive to battery voltage or Low Side (Ground) switching.
Frequency Range: 0 Hz to 10 kHz (High-speed switching capable for rotor monitoring).
Magnetic Sensing Technology: Hall Effect – Latching type (South pole activation, North pole deactivation).
Air Gap (Sensing Distance): 1.5 mm to 3.2 mm (0.06 to 0.125 inches) optimal; maximum 4.5 mm (0.18 inches).
Operating Temperature: -40°C to +125°C (-40°F to +257°F) suitable for engine bay and transmission sump exposure.
Ingress Protection: IP69K (Dust-tight, high pressure/temperature water jet resistant).
Housing Material: Glass-filled PBT (Polybutylene terephthalate) – high chemical resistance to diesel, hydraulic oil, and agricultural chemicals.
Connector Type: Deutsch-style 2-pin (DT04-2P or equivalent sealed counterpart).
Thread Size: M18 x 1.5 (Metric fine thread for adjustable depth mounting).
Locking Hardware: Includes stainless steel jam nut and copper crush washer (where applicable)
| Brand | Part Number |
|---|---|
| COGENG | RE519144 |
| John Deere | RE519144, RE508195 |
| Sparex | S.151172 |
| NSN | 2990-01-621-0689 |
| Interchange | E519144, RE519144, RE508195 |
| Model Series | Specific Models |
|---|---|
| 6000 Series | 6400, 6510L, 6600 |
| 7000 Series | 7210, 7410, 7610, 7710, 7810 |
| 8000 Series | 8100, 8200, 8300, 8400, 8420 , 8520 |
| 9000 Series | 9200, 9300, 9400, 9500 |
| 5000 Series | 5215F 5310, 5410, 5510 |
| 4000 Series | 4045T engine applications |
| PowerTech Engines | 13.5L PowerTech (6135HF485) OEM engine |
| Model Series | Specific Models |
|---|---|
| STS Series | 9880STS 9860STS, 9760STS, 9660STS, 9560STS |
| S Series | S660, S670, S680, S690 |
| T Series | T560, T660, T670 |
| W Series | W540, W650 |
| Model Series | Specific Models |
|---|---|
| 4000 Series | 4630, 4700, 4710, 4720, 4730, 4830 |
| 4000 Series | 4920, 4930, 4940 |
| 6000 Series | 6700 |
| Model Series | Specific Models |
|---|---|
| A Series | A400, D450, R450 |
| 4000 Series | 4890, 4895, 4990, 4995 |
Note: This sensor is designed for John Deere models manufactured primarily between 1974-2002, with extended compatibility through later models . Verify compatibility with your equipment model, engine serial number, and production year before ordering. Contact COGENG with your machine details for exact application verification.
| Parameter | Specification |
|---|---|
| Sensor Type | Variable reluctance (magnetic pickup) |
| Output Signal | AC voltage (sine wave) |
| Output Voltage (min) | 1.0 V AC @ 200 RPM |
| Output Voltage (typical) | 2-12 V AC (engine speed dependent) |
| Coil Resistance | 200 - 500 Ω @ 20°C |
| Inductance | 100 - 300 mH |
| Air Gap | 0.5 - 1.5 mm (0.020 - 0.060 in) |
| Connector Type | 2-pin Deutsch / AMP |
The sensor utilizes a two-wire configuration. The connector pin assignment is as follows:
Pin 1 (Signal): Output to ECU (Electronic Control Unit) – Speed/RPM signal wire. Typically Brown or Black in sensor harness.
Pin 2 (Vcc/Ground): Power input. Note: Polarity must be respected. The sensor is protected against reverse polarity, but double-checking is recommended.
Tractor Configuration (Standard): This pin serves as Battery Positive (12V/24V).
Alternate Configuration (Open Collector): This pin may serve as Signal Ground depending on the specific machine ECU variant. Critical: Check machine schematics for RE519144 vs RE219522.
Wiring Guide for John Deere specific applications:
Ground Signal: The sensor body is isolated; do not rely on chassis ground. The return path is through Pin 2.
Compatibility: Direct plug-and-play with existing OEM Deutsch connectors. No adapters required.
| Parameter | Specification |
|---|---|
| Housing Material | Durable plastic with steel threaded base |
| Thread Size | 1/4-20 UNC |
| Hex Size | 17 mm (11/16") or 19 mm (3/4") |
| Seal Material | NBR (oil resistant) |
| Weight | 0.06 - 0.10 kg (0.13 - 0.22 lbs) |
| Overall Length | 66 mm |
| Tip Material | Magnetic steel |
| Pin | Function | Signal Type |
|---|---|---|
| Pin 1 | Signal (+) | AC voltage (variable frequency) |
| Pin 2 | Signal (-) / Shield | Ground / Shield |
⚠️ IMPORTANT: Polarity matters on this sensor. The signal wires are twisted and shielded . If the positive and negative wires are reversed, the ECU may receive a noisy signal, resulting in error codes, rough running, or engine derate. Always verify correct polarity during installation.
| DTC | Description | Resolution |
|---|---|---|
| 637-02 | Crankshaft position sensor circuit | Replace speed sensor |
| P0335 | Crankshaft position sensor circuit | Replace speed sensor |
| P0336 | Crankshaft position sensor range/performance | Replace speed sensor |
| P0337 | Crankshaft position sensor low input | Replace speed sensor |
| P0338 | Crankshaft position sensor high input | Replace speed sensor |
| P0339 | Crankshaft position sensor intermittent | Replace speed sensor |
| Step | Action | Critical Note |
|---|---|---|
| Preparation | ||
| 1 | Park machine on level surface, lower implements | Safety first |
| 2 | Shut off engine, remove key | Lock-out/tag-out |
| 3 | Allow engine to cool | Prevent burns |
| 4 | Locate speed sensor on flywheel housing | Typically at rear of engine |
| Removal | ||
| 5 | Clean area around sensor | Prevent contamination |
| 6 | Mark wire orientation (positive/negative) | CRITICAL - polarity matters |
| 7 | Disconnect electrical connector (2-pin) | Inspect pins for damage |
| 8 | Remove old sensor (17mm or 19mm wrench) | Note orientation |
| 9 | Clean threads in housing | Remove debris |
| Installation | ||
| 10 | Check sensor tip for damage | Should be clean, no metal debris |
| 11 | Install new sensor hand-tight | Do not cross-thread |
| 12 | Set air gap (if adjustable) | 0.5 - 1.5 mm (0.020 - 0.060 in) |
| 13 | Torque to specification | 15-25 Nm (11-18 ft-lbs) |
| 14 | VERIFY POLARITY | Connect positive to positive, negative to negative |
| 15 | Reconnect electrical connector | Ensure fully seated, click |
| Final | ||
| 16 | Start engine, check for leaks | Inspect around threads |
| 17 | Verify tachometer operation | Should read RPM |
| 18 | Connect John Deere diagnostic tool | Clear DTCs |
| 19 | Test machine operation | Verify normal function |
If the sensor is installed but codes persist, inspect the tone wheel on the crankshaft
| Step | Action |
|---|---|
| 1 | Remove crank speed sensor (RE519144) |
| 2 | Turn engine over with turning tool until the WIDE tooth on the tone wheel is visible |
| 3 | Center the wide tooth in the sensor hole |
| 4 | Rotate engine clockwise and count small teeth passing the opening |
| 5 | At TDC (top dead center), exactly 8.5 teeth should have passed |
| 6 | Inspect for missing or damaged teeth |
| 7 | Check that tone wheel is secure (not loose) |
| Note | Detail |
|---|---|
| POLARITY CRITICAL | This sensor has polarity. Swapping positive/negative wires causes noisy signal, error codes, and engine derate |
| Shielded wires | The signal wires are twisted and shielded. Do not cut or modify |
| Magnetic tip | Sensor tip is magnetic; may attract metal debris. Keep clean. |
| Air gap critical | If adjustable, correct air gap is essential for proper operation. |
| Do not overtighten | 15-25 Nm max. Overtightening damages the sensor. |
| Tone wheel inspection | If codes persist after sensor replacement, inspect the tone wheel for damage or slippage |
| DTC clearing | Some ECUs require DTC clearing after replacement. |
| Keep original packaging | For warranty claims. |
Q: What John Deere models use the RE519144 revolution speed sensor?
A: The COGENG RE519144 revolution speed sensor is a direct OEM replacement designed for a wide range of John Deere agricultural equipment including tractors, combines, and harvesters. Specific applications include engines such as the 4045T, as well as models like the 8420, 8520, and 9880STS. This sensor monitors rotational speed and provides critical RPM data to the engine or machine control system. Always verify this part number against your equipment's parts manual or the original sensor's identification markings to confirm exact compatibility before ordering.
Q: What are the symptoms of a failing revolution speed sensor on John Deere equipment?
A: Common symptoms include engine stalling or failure to start, intermittent engine shutdowns, erratic or incorrect RPM readings on the instrument panel, rough running or misfiring, active diagnostic trouble codes related to the speed sensor circuit, the engine entering a derate or limp mode, or loss of throttle response. On combines and harvesters, a faulty speed sensor can also affect header and threshing system performance monitoring.
Q: How does the revolution speed sensor affect equipment operation?
A: The RE519144 sensor continuously monitors rotational speed and transmits real-time data to the engine ECU or machine control system. This critical information is used to control fuel injection timing, fuel delivery quantity, engine protection functions, and in harvesting equipment, the coordination of multiple drivetrain and processing components. Accurate speed sensing is essential for optimal performance, fuel efficiency, and engine protection.
Q: Is this sensor a direct plug-and-play replacement?
A: Yes, the COGENG RE519144 revolution speed sensor is manufactured to exact OEM specifications for thread size, electrical connector type, signal output characteristics, and mounting dimensions. It is a direct plug-and-play replacement requiring no wiring modifications or adapters when installed on compatible John Deere equipment.
Q: What is the warranty coverage for this revolution speed sensor?
A: COGENG provides a standard 12-month warranty against manufacturing defects from the date of installation. Proof of purchase and installation by a qualified technician are required. Warranty does not cover failure caused by improper installation, wiring damage, physical impact, overtightening, thread damage, or use on incompatible equipment.
Q: What should I check before installing the new speed sensor?
A: Before installation, inspect the sensor mounting port for debris or damage, check the electrical connector for corrosion, and ensure proper torque is applied as specified by the service manual to prevent thread damage or incorrect sensor air gap. Verify the wiring harness is in good condition to prevent signal interference.
Q: Does COGENG offer technical support for installation or troubleshooting?
A: Yes, COGENG provides complimentary technical support to assist with installation guidance and basic troubleshooting. For complex engine or machine diagnostics on John Deere equipment, we recommend consulting a certified John Deere service technician.
Q: How is the sensor protected during shipping?
A: Each COGENG RE519144 revolution speed sensor is individually sealed in a moisture-resistant poly bag and packed in a sturdy corrugated carton with protective foam padding. The electrical connector and sensor tip are capped to prevent damage during transit. In-stock items ship promptly for minimal downtime. Factory direct shipping ensures the product reaches you in optimal condition.
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