Shandong Shengyue Technology Development Co.,Ltd is one of the most professional komatsu wa200–wa900 wheel loaders gd motor graders hd mining trucks pressure switch / sensor 421-43-32912 421-43-32922 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
Komatsu WA200–WA900 Wheel Loaders GD Motor Graders HD Mining Trucks Pressure Switch / Sensor 421-43-32912 421-43-32922
Parts Technical Parameters & Application Comparison Table
| Part Number | 421-43-32912 | 421-43-32922 |
|---|---|---|
| Official Part Name | SWITCH, PRESSURE | SWITCH / SENSOR |
| System Application | Brake Accumulator Pressure Switch Typically monitors the oil pressure within the service brake circuit. |
Emergency / Parking Brake Pressure Switch Typically monitors the air or hydraulic pressure within the parking/emergency brake system. |
| Core Function | When the service brake system pressure drops below the safe critical threshold, this switch sends a signal to the dashboard or ECU, triggering the low brake pressure warning light and alarm buzzer to prevent brake failure. | Converts electrical signals when the parking brake is released (pressure built up) or engaged (pressure released). Mainly controls the parking brake indicator light and participates in drivetrain safety interlock control (cutting off travel power if the parking brake is not fully released). |
| Compatible Models (Fully covering your equipment list) |
Broad application range, including: 🔹 Wheel Loaders: Full series from WA150 to WA900 (e.g., WA200-6/-8, WA320-6, WA380-8EO, WA470-6, WA500-6/-7/-8, WA600-8, WA900-8, etc.). 🔹 Motor Graders: GD555, GD655 (such as GD655-5), GD675. 🔹 Rigid Dump Trucks: HD465, HD605, HD785 (such as HD785-7). |
Primarily focused on medium-to-large heavy equipment: 🔹 Medium-Large Loaders: WA270-7, WA320-6, WA380-6/-8, WA400, WA470-6, WA480-6, WA500-6, WA600-6/-8, WA800, WA900-8, etc. 🔹 Heavy Bulldozers: WD600, etc. |
| Approx. Net Weight | ~ 0.102 kg | ~ 0.105 kg |
Komatsu Pressure Switches Replacement Complete BOM List
| No. | Component Name | Komatsu Genuine / Equivalent Part Number | Recommended Qty |
|---|---|---|---|
| Core Assembly | |||
| 1 | Service Brake Accumulator Pressure Switch (Switch, Pressure - Brake) |
421-43-32912 (Alternative: 421-43-32911) |
1 Pc |
| 2 | Emergency / Parking Brake Pressure Switch (Switch / Sensor - Parking) |
421-43-32922 | 1 Pc |
| Seals & Gaskets | |||
| 3 | Pressure Switch Bottom O-Ring (O-Ring, Pressure Switch) |
Included with switch / Available via Komatsu hardware catalog | 2 Pcs |
| 4 | Threaded Sealing Copper Washer (Copper Washer) |
Subject to specific line fitting specifications | 2 Pcs |
| Electrical & Harness Protection | |||
| 5 | 2-Pin DT Waterproof Connector Kit (2-Pin Waterproof Connector) |
Matches Komatsu standard 2-Pin plug | 2 Sets |
| 6 | Heat Shrink Tubing / High-Flame Retardant Corrugated Pipe | Automotive / Construction Machinery Grade | As Required |
| Brake / Hydraulic System Fluids | |||
| 7 | Komatsu Genuine Brake Fluid / Hydraulic Oil | Komatsu HO56-HE / EO10-CD | 1-2 Liters |
| 8 | Brake System Accumulator Nitrogen Charge / Valve Overhaul Kit | Varies by specific equipment model | 1 Set |
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