708-1W-00151, 708-1W-00152, 708-1W-00153 Fan Pump For Komatsu GD555-5 motor grader

708-1W-00151, 708-1W-00152, 708-1W-00153 Fan Pump For Komatsu GD555-5 motor grader Featured Image
  • 708-1W-00151, 708-1W-00152, 708-1W-00153 Fan Pump For Komatsu GD555-5 motor grader

Short Description:

708-1L-00012 is a variable piston hydraulic main pump for Komatsu D65 series bulldozers.

Product Detail

Product Tags

description

This hydraulic fan pump adopts variable piston structure with built-in flow control valve, which dynamically matches fan rotating speed and cooling demand of grader. Internal piston, slipper and valve plate are processed by precision grinding technology to minimize internal friction, keeping high volumetric efficiency under long-period repeated grading and scarifying cycles. Heavy-duty cast iron pump housing owns good structural rigidity, resisting vibration, impact, dust and mud splashing on rough grading sites. It is fitted with multi-group composite high-pressure sealing assemblies, capable of enduring frequent hydraulic pressure fluctuation and wide ambient temperature variation, effectively reducing internal leakage and external oil seepage. All finished fan pumps pass strict bench tests including pressure test, flow performance, volumetric efficiency and tightness inspection before delivery. Standard flange and oil port installation dimensions fully match original assembly for direct replacement without cutting, drilling or mechanical modification.

product parameters

Part No：708-1W-00151 / 708-1W-00152 / 708-1W-00153
Interchangeable Part No：Mutually interchangeable among these three part numbers
Product Type：Variable Piston Hydraulic Fan Pump
Applicable Equipment：Komatsu GD555-5 / GD655-5 / GD675-5 Motor Grader
Core Technology：Built-in flow variable control
Pump Displacement：21 cc/rev
Rated Working Pressure：22 MPa
Max Instantaneous Peak Pressure：26 MPa
Rated Speed：1750 rpm
Max Allowable Speed：2300 rpm
Min Idle Speed：520 rpm
Volumetric Efficiency：≥93%
Working Temperature Range：-25℃ ~ +110℃
Applicable Altitude：≤3000m
Sealing Type：High pressure composite wear-resistant seal
Internal Leakage Standard：≤1.4 L/min (rated pressure)
Main Material：Cast iron pump housing, hardened piston & slipper, wear-resistant valve plate
Installation Method：Flange mounting, fixed bolt hole positioning
Application：Hydraulic power supply for grader cooling fan system

Applicable Models

This hydraulic fan pump is aftermarket replacement spare part:
・Komatsu GD555-5 Motor Grader
・Komatsu GD655-5 Motor Grader
・Komatsu GD675-5 Motor Grader
Note：708-1W-00151,708-1W-00152,708-1W-00153 are mutually interchangeable. Verify machine serial number before order placement to avoid mismatching.

Application Scenarios

This hydraulic fan pump is designed for motor grader heavy-duty leveling scenarios:
・Highway construction: Roadbed fine leveling, slope trimming and pavement base preparation under continuous long-time operation.
・Open-pit mine: Yard leveling, haul road maintenance in high dust and temperature environment.
・Land reclamation project: Large-area site grading and soil surface shaping work.
・Dam & water conservancy: Foundation leveling and access road maintenance.
・Airport & large yard: Large flat ground finishing and regular maintenance work.

advantage

・Built-in flow control valve automatically adjusts pump output according to system temperature, reduces unnecessary power loss and cuts fuel consumption during light-load fine grading work.
・Precision hardened piston, slipper and valve plate assembly maintain stable volumetric efficiency, resist abrasive wear from dust and soil particles, extending service life under long continuous grading cycles.
・Heavy-duty cast iron pump housing delivers outstanding shock and vibration resistance, protecting internal core components from impact damage on uneven construction ground.
・Multi-layer composite sealing structure maintains stable sealing performance under fluctuating pressure and temperature, effectively lowering the probability of internal leakage and external hydraulic oil seepage.
・Three part numbers 708-1W-00151,708-1W-00152,708-1W-00153 can be interchanged freely, convenient for distributors and maintenance teams to simplify spare parts inventory management.
・Standard flange and oil port mounting dimensions fully match original installation position, supporting direct on-site replacement without machining modification, reducing machine downtime and speeding up road construction progress.

FAQ 

Q1: Which grader does 708-1W-00151/708-1W-00152/708-1W-00153 fan pump fit?
A1: It mainly fits Komatsu GD555-5 motor grader, also compatible with GD655-5 and GD675-5 grader, these three part numbers are mutually interchangeable. Confirm machine serial number before purchase to avoid wrong part selection for different serial ranges.

Q2: What abnormal signs indicate the fan pump needs replacement?
A2: Fan speed fails to rise when temperature increases, pump body oil leakage, abnormal noise under heavy load, engine overheating during continuous long-time grading work. If these symptoms gradually worsen during field operation, internal wearing of the fan pump is highly possible.

Q3: What preparations should be completed before installing the fan 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 fan speed regulation function step by step under no-load condition.

Q4: The grader still overheats after replacing the fan pump, what should we check?
A4: Inspect radiator blockage, hydraulic oil viscosity, flow control valve status, fan blade damage, water pump and engine cooling circuit. Overheating issue may not be caused only by fan pump failure, full cooling system inspection is required.

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