YNF16802 controller (9140452) delivers reliable engine and hydraulic control for Hitachi EX550-3 excavators.
OEM replacement for 9140452 controller (small version)
Designed for Hitachi EX550-3 excavator electronic system
Stable ECU processing for engine and hydraulic operations
High resistance to vibration, dust, and temperature fluctuations
Plug-and-play installation with OEM connectors
The YNF16802 controller, replacing OEM number 9140452, is the small-version ECU designed for the Hitachi EX550-3 excavator. This controller manages critical machine operations, including engine performance, hydraulic coordination, and system communication. It ensures smooth machine response, efficient power distribution, and stable working cycles even under heavy-duty conditions.
Built with industrial-grade electronic components, the controller provides strong resistance to vibration, heat, and moisture—common challenges in excavation environments. The upgraded processing module ensures accurate real-time data handling and improves operational reliability.
YNF16802 is widely trusted by repair shops, excavator fleet operators, and aftermarket distributors due to its OEM-level compatibility, stable performance, and cost-effective replacement value. Installing a new controller helps eliminate issues such as poor engine response, hydraulic malfunction, frequent alarms, and communication errors, restoring full machine efficiency.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF16802 |
| OEM Number | 9140452 |
| Version | Small Version Controller |
| Applicable Machine | Hitachi EX550-3 |
| Product Type | Excavator ECU / Controller / Computer Board |
| Function | Controls engine, hydraulics, communication systems |
| Structure | Industrial-grade PCB + sealed electronic components |
| Resistance | Vibration, dust, moisture, heat |
| Installation | Plug-and-play, OEM connector compatible |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Piece |
| Shipping | Sea, Air, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Excavator ECU Control | Manages engine and hydraulic coordination |
| EX550-3 Computer Board Replacement | Direct-fit replacement for faulty ECU |
| Electrical System Repair | Restores accurate machine data processing |
| Aftermarket Excavator Electronics | Suitable for distributors and repair shops |
Related Products:
EX550-3 Monitor Panel
Hitachi Excavator Wiring Harness
Engine Control Module (ECM) for Hitachi
Hydraulic Control Valve Solenoid for EX550 Series
FAQs：
Q: Is this the small version controller?
A: Yes, YNF16802 replaces the small-size 9140452 controller.
Q: What symptoms indicate ECU failure?
A: Slow response, hydraulic errors, alarms, engine miscommunication.
Q: Is it plug-and-play?
A: Yes, designed to match OEM connectors for direct installation.
The YNF16802 9140452 EX550-3 controller provides stable, OEM-equivalent performance for Hitachi excavators. Designed with durable electronic components and precise circuitry, it restores full machine control and eliminates ECU-related failures. YNF Machinery offers reliable quality, competitive pricing, and fast global delivery—ideal for suppliers, repair centers, and fleet owners requiring dependable excavator electronic components. Contact us now for an accurate quotation.
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