708-1W-00011 Hydraulic Pump For Komatsu WA470/480-6 wheel loader

708-1W-00011 Hydraulic Pump For Komatsu WA470/480-6 wheel loader Featured Image
  • 708-1W-00011 Hydraulic Pump For Komatsu WA470/480-6 wheel loader

Short Description:

708-7S-00550 is a variable hydraulic cooling fan motor for Komatsu WA380-6 wheel loader. It drives the radiator fan and adjusts rotation speed automatically based on engine coolant and hydraulic oil temperature.

Product Detail

Product Tags

description

This hydraulic steering pump adopts variable piston structure with built-in pressure compensation valve to realize real-time matching between flow output and steering demand. Internal piston, slipper and valve plate are manufactured with precision grinding technology to minimize internal friction, delivering stable steering performance under frequent steering cycles. The high-strength cast iron pump body has excellent structural rigidity and can resist impact, dust and sediment erosion in harsh construction environments. It is equipped with high-pressure wear-resistant combined seals, which can withstand frequent hydraulic pressure fluctuations and wide ambient temperature changes, effectively reducing internal leakage and external oil leakage. All finished hydraulic pumps pass strict bench tests including pressure test, flow test, volumetric efficiency and sealing inspection before delivery. The standard flange and oil port installation interface matches original assembly perfectly for direct replacement without cutting, drilling or any mechanical modification.

product parameters

Part No：708-1W-00011
Product Type：Variable Piston Hydraulic Steering Pump
Applicable Equipment：Komatsu WA470-6 / WA480-6 Wheel Loader
Core Technology：Built-in pressure compensation variable control
Pump Displacement：28 cc/rev
Rated Working Pressure：21 MPa
Max Instantaneous Peak Pressure：25 MPa
Rated Speed：1700 rpm
Max Allowable Speed：2200 rpm
Min Idle Speed：650 rpm
Volumetric Efficiency：≥93%
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-25℃ ~ +105℃
Applicable Altitude：≤3000m
Sealing Type：High pressure composite wear-resistant seal
Internal Leakage Standard：≤1.2 L/min (rated pressure)
Main Material：Cast iron pump housing, hardened piston & slipper, wear-resistant valve plate
Application：Hydraulic power supply for wheel loader steering system

Applicable Models

This hydraulic steering pump is aftermarket replacement spare part:
・Komatsu WA470-6 wheel loader
・Komatsu WA480-6 wheel loader

Application Scenarios

This hydraulic pump is designed for wheel loader heavy-duty operation scenarios:
・Quarry site: Continuous rock loading, stockpile sorting and material transportation with frequent steering actions.
・Sand and gravel yard: Long-cycle bulk aggregate loading and stacking work with repeated left and right steering.
・Mining project: Material handling under high temperature and dusty environment.
・Road construction project: Earth moving, material handling and site foundation backfilling.
・Port and terminal: High frequency uninterrupted bulk cargo loading operation.

advantage

・Built-in pressure compensation valve automatically adjusts output flow according to steering load, cuts down unnecessary power consumption and reduces fuel consumption during light-load standby.
・Precision hardened piston, slipper and valve plate assembly maintain stable performance, resist abrasive wear from sand and dust, extending service life under frequent cyclic steering conditions.
・High-strength cast iron pump housing has excellent shock resistance, protecting internal core components from collision damage during loading and bumpy site travel.
・Multi-layer composite sealing structure keeps stable sealing performance under fluctuating pressure and temperature, effectively lowering the probability of internal leakage and external hydraulic oil seepage.
・Standard flange and oil port mounting dimensions fully match original installation position, supporting direct on-site replacement without machining modification, reducing equipment downtime and improving construction efficiency.
・Complete pump assembly delivered, no extra assembly required, convenient for distributors and maintenance service providers for stocking and quick repair.

FAQ 

Q1: Which loader does 708-1W-00011 hydraulic pump fit?
A1: It fits Komatsu WA470-6 and WA480-6 wheel loader. Confirm machine serial number before purchase to avoid ordering incorrect spare parts for different serial ranges.

Q2: What abnormal signs indicate the hydraulic steering pump needs replacement?
A2: Slow steering, heavy steering feel, pump body oil leakage, abnormal noise when turning, and obvious steering lag under heavy load. If these symptoms appear gradually and worsen over time, the pump internal components are likely worn.

Q3: What preparations should be completed before installing the hydraulic pump?
A3: Release residual hydraulic pressure, clean hydraulic pipelines and hydraulic tank, inspect hydraulic oil quality and filter condition. After assembly, bleed air from hydraulic circuit and test steering function step by step under no-load condition.

Q4: Steering is still weak after replacing the hydraulic pump, what should we check?
A4: Check steering control valve, hydraulic oil contamination, pipeline air intake and pressure setting. Poor steering performance may not only be caused by pump damage, so inspect the whole steering hydraulic circuit systematically.

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