Reliable Throttle Control for HYUNDAI Excavators

Growshine International is proud to offer the high-quality Throttle Knob Switch with part number 21Q4-20812 and 21Q420812. This essential engine control part is specifically designed for various HYUNDAI Excavator Models, ensuring precise and reliable engine speed management. As a key component in Excavator Throttle Control systems, this switch provides operators with smooth and accurate adjustment, critical for efficient digging and loading operations.

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Guaranteed Fit for HYUNDAI R-9 Series

This Throttle Knob Switch is confirmed to be compatible with the following HYUNDAI R-9 Series Excavator Models: R140-9, R200-9, R210-9, and R220-9. Maintaining your heavy machinery with genuine quality HYUNDAI Replacement Parts is crucial for minimizing downtime. We ensure this 21Q4-20812 21Q420812 switch meets or exceeds OEM specifications for durability and performance in demanding work environments. Look for specific components like the Excavator Hydraulic Pump Solenoid Valve or Heavy Duty Starter Motor to keep your fleet running smoothly.

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Detailed Product Information and SEO Focus

Product Name: Throttle Knob Switch

Brand: Growshine

Part Number: 21Q4-20812, 21Q420812

Application: HYUNDAI Excavators R140-9, R200-9, R210-9, R220-9

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Product Knowledge: The Role of the Throttle Knob Switch

The Throttle Knob Switch (21Q4-20812 21Q420812) is an interface component in the excavator's cabin. It allows the operator to manually set the desired engine RPM (revolutions per minute). In modern excavators like the HYUNDAI R220-9, this knob sends an electrical signal to the Engine Control Unit (ECU) or the main controller, which then actuates the Throttle Motor (Governor Motor) to precisely adjust the fuel rack position, thereby controlling the engine speed. A malfunctioning switch can lead to unstable engine idle or inability to reach full power, severely impacting machine productivity and safety on the job site.

Glossary of Machinery Components:

• Final Drive Assembly: Located on the tracks of an excavator (e.g., Caterpillar 345D Final Drive Assembly), it is the last reduction gear set that transmits power from the hydraulic motor to the sprocket to move the machine.

• Air Brake Chamber: Installed in the brake system of heavy trucks (e.g., Freightliner Cascadia Air Brake Chamber), it converts compressed air energy into mechanical force to engage the brakes.

• Hydraulic Control Valve: Mounted on the main body of the hydraulic system (e.g., John Deere 8320R Hydraulic Control Valve), it directs the flow of hydraulic fluid to various actuators like cylinders and motors.

• Turbocharger: Situated on the engine exhaust manifold (e.g., Volvo VNL Turbocharger), it uses exhaust gas to spin a turbine, which in turn compresses intake air to increase engine power.

• Fuel Injector: Located in the engine cylinder head (e.g., Cummins QSB6.7 Fuel Injector), it atomizes and sprays fuel into the combustion chamber.

• Water Pump: Found on the engine block (e.g., Komatsu PC300-8 Water Pump), it circulates coolant to prevent overheating.

• Steering Gear Box: Installed in the steering system of trucks/cars (e.g., Mercedes-Benz Actros Steering Gear Box), it translates the steering wheel movement into lateral motion for the wheels.

• Alternator: Located on the engine and belt-driven (e.g., Bobcat S750 Alternator), it converts mechanical energy into electrical energy to charge the battery and power the electrical system.

• Axle Shaft: Inside the axle housing of a vehicle (e.g., Ford F-150 Axle Shaft), it transfers driving torque from the differential to the wheels.

• Clutch Pressure Plate: Part of the clutch assembly in manual transmission vehicles (e.g., JCB 3CX Clutch Pressure Plate), it engages and disengages the power from the engine to the gearbox.

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Growshine International (格莳国际) specializes in the global import and export trade of a diverse range of spare parts: Engineering Machinery Components Export, Heavy Duty Truck Aftermarket Parts, Farm Equipment Maintenance Spares, and Automotive Replacement Parts Wholesale. We offer end-to-end supply chain solutions, connecting global manufacturers with maintenance professionals and distributors.

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Expanding Your Search: Beyond the Throttle Switch

While the 21Q4-20812 21Q420812 is a vital part for HYUNDAI equipment, our expertise extends to a broad array of Engine Components and Hydraulic Parts. We stock and source everything from Hydraulic Main Pump Assemblies and Travel Motor Gearboxes to Heavy Truck Filtration Systems and Agricultural Implement Components. Our commitment is to be your single point of contact for all Off-Road Machinery Spares.

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