Safety Switch 21N8-20300
Universal Gate Lock Sensor for 7 and 9-Series Machinery
The Hyundai 21N8-20300 is a mission-critical safety switch designed for a wide range of 7 and 9-series excavators and wheeled equipment. This switch is the core component that communicates the state of the safety lever (gate lock) to the machine's electronic control system. By ensuring that the hydraulic pilot circuit is only active when the operator has engaged the safety lever, it prevents accidental activation of the machine’s controls, safeguarding both the operator and the work site.
1. Technical Specifications
| Parameter | Detail |
|---|---|
| Part Number | 21N8-20300 |
| Component Type | Safety Switch (Gate Lock Sensor) |
| Primary Function | Detects the position of the safety gate/lever to enable or disable hydraulic pilot control |
| Compatibility | Extensive application across Hyundai 7 and 9-series tracked and wheeled excavators |
2. Machine Compatibility
Engineered for universal reliability across the Hyundai fleet:
Hyundai Models: R110-7/-9, R150LC-7/-9, R150W-7/-9, R210W-7/-9, R80-7, R205-7, R215-7/-7C/-9/-9C, R225-7/-9, R225LC-7/-9/-9T, R245-7, R265LC-7/-9, R275LC-9T, R305LC-7/-9/-9T, R335LC-7/-9/-9T, R375LC-7/-7H, and related configurations.
System Synergy: Provides the essential signal to the machine's electronic controller, ensuring safety protocols are strictly followed during all operating phases.
3. Maintenance & Installation Protocols
Service Interval: Replace as needed upon failure, or if the safety lever fails to enable/disable hydraulic functions consistently.
Diagnostic Indicators: Replace if the machine remains locked despite the safety lever being in the open position, or if the machine does not enter a locked state when the lever is closed. Test for signal continuity at the harness connection to confirm sensor failure.
Installation Tip: When replacing, ensure the switch is correctly mounted to the safety lever assembly so that it triggers precisely as the lever reaches its locked/unlocked position. Ensure the electrical connector is clean and moisture-proof.
4. Technical Support & Logistics
Supplier: Xuzhou Sinoswift Import & Export Co., Ltd.
WhatsApp: +86 13701956981
Email: [email protected]
Technical Note: The 21N8-20300 is a high-demand, universal safety component for the majority of the 7 and 9-series machines.