Part Name: Brake Switch
Part Number: 421-43-32922
Machine Model: Komatsu WA270-5 WA380-5 WA380-6 WA400-5 WA430-6 WA470-6 WA500-6 WA600-6 WD60006, WA480-6 WA800-3E0
Machine Type: Wheel Loader
Application: Installed in the braking system, this switch detects brake pedal engagement and transmits a signal to activate brake lights or safety interlocks, ensuring secure machine operation.
Function: The brake switch functions as a safety sensor that alerts the system or operator when brakes are applied. It helps trigger automatic responses like engine idle, alert signals, or hydraulic control modifications—improving safety and preventing unintended machine movement.
Condition/Options: New / OEM replacement / Genuine original
MOQ: 1 Piece
Delivery: 3–5 Days (Shipping Worldwide)
Growshine Brake Switch 421-43-32922 (4214332922) for Komatsu WA270-5 WA380-5 Wheel Loaders
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Need a Custom Part?
If you can't find the exact Brake Switch 421-43-32922, sensor, relay, or specialized electrical component for your heavy equipment, Growshine International offers custom development and manufacturing services for Engineering Machinery, Heavy Truck, Agricultural, and Automotive Parts. Send us your samples or specifications today!
Product Details and Application
The Brake Switch 421-43-32922 (also listed as 4214332922) is a critical electrical component designed for the robust performance of Komatsu Wheel Loaders, specifically fitting models like the Komatsu WA270-5 and Komatsu WA380-5. This part ensures the proper function of the braking system's electric signals, vital for both safety lights and the machine’s internal control unit (ECU).
At Growshine International (格莳国际), our core business is the import and export trade of high-quality spare parts across multiple sectors. We are a reliable global supplier, dedicated to providing durable and affordable replacement parts. Our extensive inventory covers Engineering Machinery Parts Export, Heavy Truck Engine Components, specialized Agricultural Machinery Sensors, and a wide array of Automotive Spare Parts Import.
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Understanding the Brake Switch (421-43-32922)
The Brake Switch, sometimes referred to as a Stop Light Switch, is an electromechanical safety device. In a heavy machine like the Komatsu WA270-5 WA380-5 Loaders, its function goes beyond merely illuminating the brake lights. Installed near the brake pedal, it sends a crucial electronic signal to the machine's Electronic Control Unit (ECU) as soon as the operator applies the brake.
This signal is fundamental for systems such as the Transmission Lock-up Control, helping to smoothly disengage the torque converter when braking is initiated, preventing stalling, and reducing wear. A failure in the Brake Switch 4214332922 can cause severe functional issues, including brake lights not activating (a significant safety hazard), transmission shifting errors, or failure of related engine controls. Immediate replacement with a quality part from Growshine International is essential for machine uptime and operator safety.
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Holset
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3K
Schwitzer
IHI
Mitsubishi
Hitachi
CZ
Toyota
Komatsu
Bosch Mahle
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Growshine Featured Product List & Purchasing
Below is a selection of other featured products from Growshine International's catalog, including parts for Volvo (TAD, VOE), Isuzu (6HK1), Caterpillar (C9), and other Engineering Machinery Parts and Heavy Truck Parts.
| English Title | Part Number |
|---|---|
| Exhaust Manifold Screw for TAD531GE, TAD532GE | 20405587 |
| Generator Set Oil Pressure Sensor TAD1631GE | 866835 |
| Truck Pressure Sensor | 54496773, 6674316 |
| 4-Wire Excavator E320C Ignition Switch | 9G7641, 9G-7641 |
| Excavator 6HK1 6BG1 Ignition Switch | 8-97044418-0, 8970444180 |
| Engineering Machinery C9 Thermostat | 247-7133, 2477133 |
| Generator for 3116, 3126, C18 | 197-8820, 1978820 |
| 12V Forklift Relay | 91306-05700 |
| Auxiliary Water Tank Cap | 4804409, 11431708, 4804410, 1674083 |
| Oil-Water Separator Filter Cup TAD734GE | VOE11110737, 11110737 |
| Fuel Tank Cap Diesel Tank Cap | VOE14528922, 14528922 |
| 6HK1 Thermostat | 8-94392817-0, 8943928170 |
Expanding Your Search: KALMAR and Port Machinery Parts
In addition to Komatsu Loader Parts like the 421-43-32922 Brake Switch, Growshine International is also a key supplier for port machinery and material handling equipment. If your business requires KALMAR Product List components, we have a specialized catalog ready for you.
Global Parts Knowledge: Key Component Definitions
Understanding the components of Engineering Machinery, Heavy Truck, Agricultural Machinery, and Automotive systems is crucial for accurate parts ordering.
Fuel Injector (Automotive): Located in the engine combustion chamber/intake manifold, responsible for spraying fuel into the cylinders. Example: Toyota Corolla 2023 Fuel Injector.
Hydraulic Pump (Engineering Machinery): Located in the hydraulic system, near the engine/reservoir, converting mechanical power into hydraulic energy to move machine actuators. Example: Caterpillar 320D Hydraulic Pump.
Turbocharger (Heavy Truck): Attached to the engine exhaust manifold, uses exhaust gas energy to compress intake air, boosting engine power. Example: Volvo VNL Turbocharger.
Planetary Carrier (Agricultural Machinery): Located within the axle/transmission housing, holding the pinion gears in a planetary gear set. Example: John Deere 8320R Planetary Carrier.
Steering Knuckle (Automotive): Located in the front suspension, connecting the wheel hub to the suspension and steering linkages. Example: Ford F-150 Steering Knuckle.
Alternator (Engineering Machinery): Mounted on the engine, converts mechanical energy into electrical energy to power electrical systems and charge the battery. Example: Hitachi ZAXIS 210 Alternator.
Air Dryer Cartridge (Heavy Truck): Located in the air braking system, filtering moisture and contaminants from the compressed air line. Example: Freightliner Cascadia Air Dryer Cartridge.
Tie Rod End (Automotive): Connecting the steering rack to the steering knuckle, translating movement to the wheels. Example: BMW 320i Tie Rod End.
Track Adjuster Cylinder (Engineering Machinery): Located on an excavator/dozer undercarriage, maintaining proper tension on the track chain. Example: Komatsu PC300-8 Track Adjuster Cylinder.
Clutch Assembly (Agricultural Machinery): Located between the engine and transmission, enabling engagement and disengagement of power to the drivetrain. Example: New Holland T7 Clutch Assembly.
Heavy Truck Troubleshooting: Low Power and Black Smoke
Equipment Example: Volvo FH16 Truck
If your Volvo FH16 Truck experiences low engine power and excessive black smoke, the issue often points to insufficient air for combustion or a restriction in the exhaust aftertreatment system. Common culprits include a clogged Diesel Particulate Filter (DPF) or a failed Exhaust Gas Recirculation (EGR) valve.
Solution Steps:
Diagnosis: Check diagnostic codes. If DPF restriction codes are present, perform a forced DPF regeneration using the appropriate diagnostic software.
EGR Inspection: If codes persist or air flow is suspect, inspect the Volvo FH16 EGR Valve for heavy carbon buildup, which restricts exhaust flow and affects engine performance.
Part Replacement: If the EGR valve is faulty or cannot be adequately cleaned, replace it immediately. Timely replacement prevents more severe damage to the engine. We supply high-quality Heavy Truck Engine Components globally.
