708-1U-00241 Hydraulic Pump For Komatsu WA380 wheel loader

708-1U-00241 Hydraulic Pump For Komatsu WA380 wheel loader Featured Image
  • 708-1U-00241 Hydraulic Pump For Komatsu WA380 wheel loader

Short Description:

708-1W-00491 is a variable displacement axial piston main hydraulic pump developed for Komatsu WA380 wheel loader, designed with hydraulic power sensing and torque limiting dual regulation.

Product Detail

Product Tags

description

This variable piston pump integrates load sensing regulator and pressure compensation valve. When the operator actuates boom or bucket, the pump automatically raises displacement to meet flow demand; when no action is required, it reduces output to save engine power. Built-in pressure shock absorber reduces hydraulic impact during cylinder start and stop, protecting hydraulic pipelines and seals.
The pump housing adopts refined pearlite cast iron with stable mechanical property under cyclic pressure. The piston and sliding shoe assembly uses surface carburizing hardening treatment, improving wear resistance under medium heavy load. The valve plate adopts precision plane matching process to control internal leakage steadily. The multi-layer composite sealing group can resist dust and oil contamination in open-air sites.

product parameters

Part No：708-1U-00241
Product Type：Load Sensing Variable Axial Piston Main Pump
Applicable Equipment：Komatsu WA380-5 Wheel Loader
Core Technology：Load sensing + pressure compensation control, hydraulic shock absorption
Theoretical Displacement：92 cc/rev
Rated Working Pressure：22 MPa (220 bar)
Max Instantaneous Peak Pressure：26.5 MPa (265 bar)
Rated Working Speed：1750 rpm
Max Allowable Speed：2100 rpm
Max Combined Output Flow：148 L/min
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +105℃
Sealing Grade：Multi-layer dust-proof composite seal, low internal leakage
Main Material：Pearlite cast iron housing, carburized piston & sliding shoe, precision plane valve plate
Installation Method：Flange mounting, spline drive shaft
Net Weight：Approx 26.7KG
Application：Supply hydraulic power for loader boom, bucket and steering hydraulic circuits

Applicable Models

This hydraulic pump is aftermarket replacement spare part for Komatsu wheel loader:
• Komatsu WA380-5

Application Scenarios

708-1U-00241 hydraulic main pump fits versatile loading tasks for older generation wheel loaders:
• Aggregate yard operation: Sand and gravel stacking and truck loading.
• General construction site: Earth stockpiling, backfilling and site cleanup.
• Small quarry auxiliary work: Fragmented rock handling and haul road maintenance.
• Farmland water conservancy: Soil excavation and material transportation.
• Waste transfer station: Bulk solid waste stacking and shifting.

advantage

• Load sensing and pressure compensation dual control, automatically match flow output according to operation actions, reduce unnecessary power consumption during standby.
• Built-in hydraulic shock absorption structure, effectively reduce pressure pulsation and extend service life of hydraulic cylinders and hoses.
• Stable pearlite cast iron pump body, good rigidity to withstand repeated impact from medium-heavy loading cycles.
• Carburized piston and sliding shoe assembly, maintain reliable wear resistance under long-time cyclic load.
• Precision plane matched valve plate, keep stable leakage performance after thousands of working hours.
• Multi-layer dust-proof sealing assembly, adapt to dusty open-air working environment of material yards.
• Standard spline and port design, simple on-site replacement and shorten machine downtime.

FAQ 

Q1: Which machine does 708-1U-00241 hydraulic pump fit?
A1: This hydraulic main pump is specially designed for Komatsu WA380-5 wheel loader. Confirm machine serial number before purchase to avoid wrong part selection.

Q2: What is the difference between WA380-5 pump and WA380-6 pump?
A2: WA380-5 adopts load sensing plus pressure compensation, focusing on stable output for medium load. WA380-6 model upgrades power limiting function to handle heavier digging load, so they cannot be interchanged.

Q3: What are typical failure symptoms of this hydraulic pump?
A3: Common faults: Bucket digging power decline; boom lifting speed slow under load; obvious hydraulic shock when cylinder starts; unstable working pressure; oil leakage at pump shaft.

Q4: What preparations should be completed before pump installation?
A4: Release hydraulic residual pressure, clean hydraulic tank and pipelines, replace hydraulic oil and return filter. Inspect main relief valve and hydraulic hoses. After assembly, bleed air and test boom and bucket operation performance.

Q5: After pump replacement, loader still has obvious hydraulic shock when lifting boom, what are the possible causes?
A5: Hydraulic shock may not be caused by main pump. Check aging cylinder buffer seals, trapped air inside hydraulic circuit, abnormal relief valve setting or damaged pipeline fixing brackets.

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