| Parameter | Specification |
|---|---|
| Product Name | Sensor |
| COGENG Part Number | 6217-81-9210 (6217819210) |
| OEM Equivalent | Komatsu 6217-81-9210, 6217819210 |
| Product Type | Engine / Hydraulic Sensor |
| Sensor Type | Piezoresistive pressure transducer or temperature sensor |
| Output Type | 4-20 mA, 0.5-4.5V, or resistance (application dependent) |
| Application | Engine or hydraulic system monitoring |
| Compatible Model | Komatsu PC400-7 Excavator |
| 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 | 6217-81-9210, 6217819210 |
| Komatsu | 6217-81-9210, 6217819210 |
| Interchange | 6217-81-9211, 6217-81-9212, 6217-81-9213 |
| Parameter | Specification |
|---|---|
| Model | Komatsu PC400-7 Excavator |
| Type | 40-ton Crawler Excavator |
| Series | Dash 7 |
| Engine | Komatsu SAA6D125E-3 |
| Engine Power | 250-300 kW (335-402 HP) |
| Operating Weight | 38,000 - 42,000 kg |
| Hydraulic Pressure | 350 bar (5,075 psi) |
| Parameter | Specification |
|---|---|
| Displacement | 11.0L (671 cu in) |
| Cylinders | 6 in-line |
| Fuel System | Common rail (high pressure) |
| Emission Standard | Tier 3 / Stage IIIA |
✔ OEM Replace Number: 6217-81-9210, also replaces 6217-81-9211, 6217-81-9220 – direct fit for Komatsu excavators
✔ Precision Signal: Accurate hydraulic pump RPM detection for optimal machine performance
✔ Wide Compatibility: Works with PC400-7, PC400-8, PC400LC-7, PC350-7, PC300-7, PC450-7, PC200-8 and more
✔ Heavy Duty Construction: Oil and pressure resistant for hydraulic system environment
✔ Plug & Play Installation: Direct replacement, no calibration required
✔ Cost Effective: OEM quality at competitive price
The 6217-81-9210 sensor may be used for:
| Application | Function |
|---|---|
| Engine Oil Pressure | Monitors engine oil pressure for protection |
| Fuel Rail Pressure | Monitors common rail fuel pressure |
| Hydraulic Pressure | Monitors main pump or implement pressure |
| Boost Pressure | Monitors turbocharger boost pressure |
| Coolant Temperature | Monitors engine coolant temperature |
| Intake Air Temperature | Monitors intake air temperature |
Q: What Komatsu models use the 6217-81-9210 revolution speed sensor?
A: The COGENG 6217-81-9210 revolution speed sensor is a direct OEM replacement designed for Komatsu PC400-7, PC400-8, PC350-7, PC300-7, PC450-7, and PC200-8 excavator models. This sensor is typically used for monitoring hydraulic pump rotational speed, providing critical pump RPM data to the machine's electronic control system for precise engine-pump coordination. 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 hydraulic pump speed sensor?
A: Common symptoms include erratic or unresponsive hydraulic pump operation, abnormal pump control behavior, reduced hydraulic performance or slow implement response, active diagnostic trouble codes related to the pump speed sensor circuit, the machine entering a failsafe or limp mode, or intermittent hydraulic power loss. Because this sensor directly affects engine-pump power matching, a faulty sensor can significantly impact digging force, speed, and fuel efficiency.
Q: How does the hydraulic pump speed sensor affect excavator operation?
A: The 6217-81-9210 sensor continuously monitors hydraulic pump rotational speed and transmits real-time data to the machine's electronic control system. This information is used to precisely match engine output to hydraulic load demand, manage pump displacement, and protect the hydraulic system from overspeed conditions. Accurate pump speed sensing is essential for optimal hydraulic performance, smooth operation, and fuel efficiency.
Q: Is this sensor a direct plug-and-play replacement?
A: Yes, the COGENG 6217-81-9210 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 Komatsu excavator models.
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 hydraulic fluid contamination, 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. Contaminated hydraulic fluid should be addressed before sensor replacement.
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