708-7W-00230 Fan Motor For Komatsu HM400 series articulated dump trucks

708-7W-00230 Fan Motor For Komatsu HM400 series articulated dump trucks Featured Image
  • 708-7W-00230 Fan Motor For Komatsu HM400 series articulated dump trucks

Short Description:

708-7W-00130 is a variable hydraulic cooling fan motor for Komatsu large excavator PC800-8 / PC800LC-8E0.

Product Detail

Product Tags

description

This hydraulic fan motor adopts built-in proportional control structure to realize stepless fan speed regulation, matching cooling capacity with real-time working load of the dump truck. Internal piston, rotor and heavy-duty bearing components are processed by precision grinding technology to reduce running friction, maintaining low vibration and low noise operation under continuous heavy haul cyclic work. High-strength alloy cast housing has excellent structural rigidity and can resist impact, dust and mud erosion on rugged haul roads. It is equipped with multiple groups of composite high-pressure sealing assemblies, capable of coping with frequent hydraulic pressure fluctuations and wide ambient temperature changes, effectively preventing internal hydraulic leakage and external oil seepage. All finished fan motors pass strict bench tests including pressure resistance, speed response, rotation stability and tightness inspection before delivery. Standard flange installation interface fully matches original assembly for direct replacement without cutting, drilling or mechanical modification.

product parameters

Part No：708-7W-00230
Product Type：Variable Speed Hydraulic Cooling Fan Motor
Applicable Equipment：Komatsu HM400-3R / HM400-3M0 / HM400-5E0 Articulated Dump Truck
Core Technology：Proportional control stepless speed regulation
Motor Displacement：17 cc/rev
Rated Working Pressure：23 MPa
Max Instantaneous Peak Pressure：27 MPa
Rated Speed：1850 rpm
Max Allowable Speed：2400 rpm
Min Idle Speed：500 rpm
Rated Output Torque：43 N・m
Speed Response Time：≤0.35s
Working Temperature Range：-25℃ ~ +110℃
Applicable Altitude：≤3000m
Sealing Type：Multi-composite high pressure wear-resistant seal
Internal Leakage Standard：≤1.5 L/min (rated pressure)
Axial Rotor Clearance：0.016mm precision tolerance
Main Material：Alloy cast housing, hardened integral rotor, heavy-duty wear-resistant bearing
Installation Method：Flange mounting, fixed bolt hole positioning
Application：Radiator fan drive for articulated dump truck engine and hydraulic system cooling

Applicable Models

This hydraulic fan motor is aftermarket replacement spare part:
・Komatsu HM400-3R Articulated Dump Truck
・Komatsu HM400-3M0 Articulated Dump Truck
・Komatsu HM400-5E0 Articulated Dump Truck

Application Scenarios

This fan motor is designed for articulated dump truck heavy-duty hauling scenarios:
・Open-pit mine: Long-distance heavy ore transportation on rough haul roads, continuous round-trip operation under high temperature and dust.
・Quarry site: Rock debris and aggregate hauling, frequent uphill and downhill transportation.
・Large earthmoving project: Mass soil transportation, site cut and fill construction.
・Infrastructure construction: Mountain road, dam project bulk material transfer.
・Sand & gravel yard: Cyclic loading and hauling of sand and stone aggregates.

advantage

・Built-in proportional control structure automatically adjusts fan speed according to coolant and hydraulic oil temperature, cuts unnecessary power consumption and reduces fuel consumption during low-load cruising.
・Precision hardened rotor and heavy-duty bearing assembly maintain stable rotary performance, resist abrasive wear from rock dust and mud particles, extending service life under long-time heavy haul cyclic conditions.
・High-strength alloy cast housing has outstanding shock resistance, protecting internal core components from collision damage caused by flying stones and bumpy haul routes.
・Multi-layer composite sealing structure maintains stable sealing effect under fluctuating pressure and temperature, effectively lowering the probability of internal leakage and external hydraulic oil seepage.
・Standard flange mounting dimensions fully match original installation position, supporting direct on-site replacement without machining modification, reducing vehicle downtime and improving overall site transportation efficiency.
・Complete motor assembly delivered, no extra assembly required, convenient for distributors and mine maintenance teams for stocking and rapid on-site repair.

FAQ 

Q1: Which dump truck does 708-7W-00230 fan motor fit?
A1: It fits Komatsu HM400 series articulated dump trucks including HM400-3R, HM400-3M0 and HM400-5E0. Confirm machine serial number before purchase to avoid wrong part selection for different serial ranges.

Q2: What abnormal signs indicate the fan motor needs replacement?
A2: Fan produces obvious abnormal noise during operation, fan rotation speed fails to adjust with temperature changes, motor housing oil leakage, engine overheating during long uphill heavy load hauling. If these symptoms gradually worsen during continuous transportation, internal wearing of the fan motor is highly possible.

Q3: What preparations should be completed before installing the fan motor?
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 engine still overheats after replacing the fan motor, what should we check?
A4: Inspect radiator blockage, hydraulic oil viscosity, proportional control signal, fan blade damage, water pump and engine cylinder status. Engine overheating issue may not be caused only by fan motor failure, full cooling system inspection is required.

Q5: What is the warranty scope of this fan motor?
A5: 12 months warranty for manufacturing defects. Damage caused by oil pollution, improper installation, overloading operation and lack of regular maintenance is not covered by warranty.

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