- EN
| Parameter | Specification |
|---|---|
| Product Name | High Pressure Switch Sensor |
| COGENG Part Number | 4436271 |
| OEM Equivalent | John Deere 4436271, Hitachi 4436271 |
| Product Type | Hydraulic Pressure Sensor / Switch |
| Sensor Type | Piezoresistive pressure transducer |
| Output Type | 4-20 mA or 0.5-4.5V (application dependent) |
| Application | Hydraulic system high pressure monitoring |
| Compatible Models | John Deere excavators; Hitachi ZX210, ZX270 |
| Material | Iron + Rubber (seals: NBR / FKM) |
| Packing | PP bag inside, carton box outside |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Supply Capacity | 500 PCS |
| Brand | Part Number |
|---|---|
| COGENG | 4436271 |
| John Deere | 4436271 |
| Hitachi | 4436271 |
| Interchange | 4436272, 4436273, 4436274, 4436275, 4452701 |
| Parameter | Specification |
|---|---|
| Supply Voltage | 8-36V DC (typically 24V system) |
| Output Signal | 4-20 mA (current loop) or 0.5-4.5V analog |
| Current Draw | ≤ 25 mA |
| Response Time | < 5 ms |
| Insulation Resistance | ≥100MΩ @ 500V DC |
| Reverse Polarity Protection | Yes |
| Overvoltage Protection | Yes |
| Parameter | Specification |
|---|---|
| Pressure Range | 0 - 350 bar (0 - 5,075 psi) |
| Measurement Type | Gauge pressure (relative to atmosphere) |
| Accuracy | ±1.0% to ±2.0% of full scale |
| Overpressure Limit | 525 bar (7,600 psi) |
| Burst Pressure | 875 bar (12,700 psi) |
| Compensated Temperature | -40°C to +105°C |
| Parameter | Specification |
|---|---|
| Connector Type | 3-pin Deutsch DT / AMP |
| Mounting Thread | 7/16-20 UNF or M12 × 1.5 (OEM spec) |
| Hex Size | 19 mm (3/4") or 22 mm (7/8") |
| Housing Material | Stainless steel / Zinc-nickel plated steel |
| Diaphragm Material | 17-4PH stainless steel |
| Seal Material | NBR / FKM (Viton) - Leak-proof design |
| Weight | 0.10 - 0.15 kg (0.22 - 0.33 lbs) |
| Overall Length | 55-65 mm |
| Pin | Function | Signal Type | Wire Color (Typical) |
|---|---|---|---|
| Pin 1 | Sensor Supply (+) | 24V DC | Red |
| Pin 2 | Sensor Signal | 4-20 mA or 0.5-4.5V | Yellow/White |
| Pin 3 | Sensor Ground (-) | 0V | Black |
| Pressure (bar) | Pressure (psi) | Output (mA) | Condition |
|---|---|---|---|
| 0 | 0 | 4.0 ±0.1 | No pressure |
| 87.5 | 1,269 | 8.0 ±0.1 | Low pressure |
| 175 | 2,538 | 12.0 ±0.1 | Medium pressure |
| 262.5 | 3,806 | 16.0 ±0.1 | High pressure |
| 350 | 5,075 | 20.0 ±0.1 | Maximum pressure |
| Pressure (bar) | Pressure (psi) | Output (V) | Condition |
|---|---|---|---|
| 0 | 0 | 0.5 ±0.1 | No pressure |
| 87.5 | 1,269 | 1.5 ±0.1 | Low pressure |
| 175 | 2,538 | 2.5 ±0.1 | Medium pressure |
| 262.5 | 3,806 | 3.5 ±0.1 | High pressure |
| 350 | 5,075 | 4.5 ±0.1 | Maximum pressure |
| Parameter | Rating |
|---|---|
| Operating Temperature | -40°C to +105°C (-40°F to +221°F) |
| Storage Temperature | -40°C to +125°C (-40°F to +257°F) |
| Ingress Protection | IP67 / IP69K (connector mated) |
| Vibration Resistance | 20G @ 50-2000Hz |
| Shock Resistance | 100G |
| Media Compatibility | Hydraulic oil, diesel fuel |
| Corrosion Protection | 500+ hours salt spray |
| Leakage Rating | Zero (leak-proof design) |
| Model | Series | Application |
|---|---|---|
| ZX210 | -3, -5, -5A, -6 | High pressure hydraulic monitoring |
| ZX210LC | -3, -5, -5A, -6 | High pressure hydraulic monitoring |
| ZX210K | -3, -5, -5A, -6 | High pressure hydraulic monitoring |
| ZX270 | -3, -5, -5A, -6 | High pressure hydraulic monitoring |
| ZX270LC | -3, -5, -5A, -6 | High pressure hydraulic monitoring |
| ZX270K | -3, -5, -5A, -6 | High pressure hydraulic monitoring |
| Model | Series | Application |
|---|---|---|
| 210G | G-Series | High pressure hydraulic monitoring |
| 210G LC | G-Series | High pressure hydraulic monitoring |
| 240G | G-Series | High pressure hydraulic monitoring |
| 270G | G-Series | High pressure hydraulic monitoring |
| 270G LC | G-Series | High pressure hydraulic monitoring |
| 300G | G-Series | High pressure hydraulic monitoring |
Frequently Asked QuestionsNote: Verify compatibility with your equipment model and serial number before ordering. Contact COGENG with your machine details for exact application verification.
Q: What Hitachi and John Deere models use the 4436271 high pressure switch sensor?
A: The COGENG 4436271 high pressure switch sensor is a direct OEM replacement specifically designed for Hitachi ZX210 and ZX270 excavator models, as well as equivalent John Deere excavator models where this sensor part number is specified. This switch sensor is typically used in the hydraulic system for monitoring high pressure circuits 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 high pressure switch sensor on a Hitachi ZX210 or ZX270?
A: Common symptoms include false or absent high pressure warnings on the monitor panel, active diagnostic trouble codes related to the pressure switch circuit, degraded hydraulic performance or unexpected power reduction, the machine failing to recognize hydraulic load conditions, or the engine control system failing to properly match engine speed to hydraulic demand. A faulty high pressure switch can lead to reduced digging force, poor fuel efficiency, or unintended system overloads if pressure limits are not properly detected.
Q: How does the high pressure switch sensor affect excavator operation?
A: The 4436271 high pressure switch sensor provides critical on/off or threshold pressure data to the machine's electronic control system. It triggers specific control responses when hydraulic pressure reaches predetermined levels, such as pump destroke commands, overload protection, or engine speed adjustments. Accurate and leak-proof pressure switching is essential for protecting hydraulic components and optimizing machine performance.
Q: Is this sensor a direct plug-and-play replacement?
A: Yes, the COGENG 4436271 high pressure switch sensor is manufactured to exact OEM specifications for thread size, electrical connector type, pressure threshold settings, sealing design, and response characteristics. It is a direct plug-and-play replacement requiring no wiring modifications or adapters when installed on compatible Hitachi ZX210, ZX270, or equivalent John Deere excavator models.
Q: What makes this sensor "leak-proof"?
A: The COGENG 4436271 sensor features precision-machined threads, high-quality sealing surfaces, and durable O-ring or gasket materials that meet or exceed OEM specifications. When properly installed and torqued to manufacturer specifications, the sensor provides a reliable, leak-proof seal against hydraulic fluid leakage, preventing the environmental and safety hazards associated with hydraulic leaks.
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