YNF17321 throttle knob switch 21Q4-20811, accelerator control knob for Hyundai R-9 excavator.
OEM reference: 21Q4-20811
Application: Hyundai R-9 excavators
Provides precise throttle control and smooth engine response
Built with durable materials for long service life
OEM-equivalent aftermarket replacement, cost-effective solution
The YNF17321 throttle knob switch (21Q4-20811) is designed for Hyundai R-9 excavators, functioning as the accelerator control knob that adjusts engine speed. This component is essential for precise throttle control, enabling operators to manage power output efficiently during excavation and lifting operations.
Manufactured with high-quality polymers and electronic components, the knob switch ensures smooth engine response, reliable signal transmission, and long-lasting durability. A worn or faulty throttle knob can lead to poor acceleration control, reduced efficiency, and downtime.
Replacing it with the YNF aftermarket throttle knob ensures OEM-equivalent performance at a competitive price, making it a trusted choice for repair shops, fleet owners, and global distributors.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17321 |
| OEM Reference | 21Q4-20811 |
| Product Type | Throttle Knob Switch / Accelerator Control Knob |
| Application Machine | Hyundai R-9 Excavator |
| Function | Provides throttle control and adjusts engine RPM |
| Material | High-strength polymer and electronic components |
| Resistance | Wear, vibration, and electrical fatigue |
| Country of Origin | China |
| Aftermarket Brand | YNF |
| MOQ | 1 Piece |
| Shipping Method | Sea, Air, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Hyundai R-9 Excavator | Provides precise throttle adjustment during operation |
| Engine Speed Control | Adjusts engine RPM for digging, lifting, or idling |
| Preventive Maintenance | Replacement ensures consistent performance |
| Parts Distribution | Popular aftermarket component for global spare parts |
Related Products:
Excavator Accelerator Cables & Control Switches
Hyundai Excavator Electrical Components
Excavator Engine Control System Parts
FAQs:
Q: What is the OEM number of this throttle knob?
A: The OEM reference is 21Q4-20811.
Q: Which excavator does it fit?
A: It is designed for Hyundai R-9 excavators.
Q: Why replace throttle knob switches?
A: To ensure smooth throttle response, prevent downtime, and maintain engine efficiency.
The YNF17321 throttle knob switch (21Q4-20811) offers accurate and reliable throttle control for Hyundai R-9 excavators. Built with durable materials and electronic components, it ensures smooth acceleration, stable engine speed, and long service life. YNF throttle knobs are preferred by distributors, contractors, and repair shops worldwide, providing OEM-level quality at competitive aftermarket pricing.
