Engineered to Komatsu OEM tolerances (±0.02mm), the 7055230390 gear pump delivers 98.2% volumetric efficiency for WA400/WA420 wheel loaders. This critical component replaces 705-52-30390 with identical performance to factory units.
Efficiency Benchmarking
| Parameter | 7055230390 | Industry Standard |
|---|---|---|
| Flow Rate | 85 L/min @ 2,000 RPM | ISO 4409 |
| Pressure Stability | 180±2 bar | SAE J745 |
| Volumetric Eff. | 98.2% @ 100 bar | ISO 4406:2021 |
| Power Loss | < 3.8 kW @ max load | DIN 51524 |
| Noise Level | 72 dB(A) @ 1m | ISO 4412-1 |
Precision Compatibility
| Model Series | Sub-Models | Production Years |
|---|---|---|
| WA400-6 | WA400-6, WA400-6H | 2010-2014 |
| WA400-7 | WA400-7, WA400-7L | 2015-2019 |
| WA420-5 | WA420-5, WA420-5E | 2008-2012 |
| WA420-8 | WA420-8, WA420-8C | 2020-Present |
Wear Prevention Engineering
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Gear Tooth Optimization
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Asymmetric involute profile (20° pressure angle)
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Case-hardened 20MnCr5 steel (HRC 60-62)
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Bushing Technology
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Sintered bronze with PTFE infusion
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PV rating: 3.5 MPa·m/s
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Seal Integrity
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Triple-lip Viton® seals (12,000 PSI/150°C)
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Zero-leak guarantee @ 10,000 hours
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