| Parameter | Specification |
|---|---|
| Product Name | Oil Pressure Switch |
| COGENG Part Number | 4259333 |
| OEM Equivalent | Hitachi 4259333, John Deere 4259333 |
| Product Type | Engine Oil Pressure Switch |
| Switch Type | Normally Closed (NC) |
| Application | Engine oil pressure monitoring |
| Compatible Models | Hitachi excavators; John Deere excavators |
| Material | Iron + Rubber |
| Packing | PP bag inside, carton box outside |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Supply Capacity | 500 PCS |
| Model | Series | Type |
|---|---|---|
| 70D | D-Series | Excavator |
| 190 | Standard | Excavator |
| 290D | D-Series | Excavator |
| 490 | Standard | Excavator |
| 495D | D-Series | Excavator |
| 590D | D-Series | Excavator |
| 595D | D-Series | Excavator |
| 790D | D-Series | Excavator |
| 792DLC | D-Series | Excavator |
| 892 | Standard | Excavator |
| Model | Series | Type |
|---|---|---|
| 200D | D-Series | Excavator |
| 210D | D-Series | Excavator |
| 200G | G-Series | Excavator |
| 210G | G-Series | Excavator |
| 240G | G-Series | Excavator |
| 270G | G-Series | Excavator |
| 300G | G-Series | Excavator |
| 350G | G-Series | Excavator |
| Brand | Part Number |
|---|---|
| COGENG | 4259333 |
| Hitachi | 4259333 |
| John Deere | 4259333 |
| Interchange | 4259334, 4259335, 4296478, 4296479 |
Frequently Asked Questions
Q: What John Deere models use the 4259333 pressure sensor?
A: The COGENG 4259333 pressure sensor is a direct OEM replacement specifically designed for John Deere 290D, 490, 790D, and 892 excavator models. It may also be compatible with other John Deere equipment where this sensor part number is specified. This sensor is typically used for monitoring hydraulic system pressure and providing critical feedback to the machine control system. 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 pressure sensor on a John Deere excavator?
A: Common symptoms include inaccurate or erratic pressure readings on the monitor panel, active diagnostic trouble codes related to the pressure sensor circuit, degraded hydraulic performance or unexpected power reduction, the machine entering a failsafe or limp mode, intermittent hydraulic function response, or the engine control system failing to properly match engine speed to hydraulic load demand. A faulty pressure sensor can significantly impact overall machine performance, digging force, and fuel efficiency.
Q: How does the pressure sensor affect excavator operation?
A: The 4259333 sensor provides real-time hydraulic pressure data to the machine's electronic control system. This information is used to manage pump displacement, engine speed matching, and implement response. Accurate pressure sensing is essential for smooth hydraulic operation, preventing system overloads, and optimizing fuel consumption.
Q: Is this sensor a direct plug-and-play replacement?
A: Yes, the COGENG 4259333 pressure sensor is manufactured to exact OEM specifications for thread size, electrical connector type, pressure range, output signal characteristics, and response time. It is a direct plug-and-play replacement requiring no wiring modifications or adapters when installed on compatible John Deere excavator models.
Q: What is the warranty coverage for this pressure 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 hydraulic fluid contamination, over-pressurization, improper installation, overtightening, thread damage, or use on incompatible equipment.
Q: What should I check before installing the new pressure sensor?
A: Before installation, verify the hydraulic system is fully depressurized, inspect the sensor mounting port for debris or damage, check the electrical connector for corrosion, and apply the appropriate thread sealant if specified by the service manual. Torque the sensor to manufacturer specifications to prevent thread damage or hydraulic leaks. Contaminated hydraulic fluid can damage the new sensor, so verify fluid cleanliness and replace hydraulic filters if necessary.
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 hydraulic system diagnostics on John Deere excavators, we recommend consulting a certified John Deere service technician.
Q: How is the sensor protected during shipping?
A: Each COGENG 4259333 pressure 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 probe tip are capped to prevent damage during transit. Factory direct shipping ensures the product reaches you in optimal condition.
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