708-7W-00140 Fan Motor For Komatsu D155A-6 bulldozer

708-7W-00140 Fan Motor For Komatsu D155A-6 bulldozer Featured Image
  • 708-7W-00140 Fan Motor For Komatsu D155A-6 bulldozer

Short Description:

708-1H-00231 is a variable displacement main piston pump designed for Komatsu D85PX series bulldozer.

Product Detail

Product Tags

description

This hydraulic fan motor adopts built-in proportional solenoid valve for stepless speed regulation. Its internal rotor, piston and bearing components are manufactured by precision grinding process, delivering stable rotation and low vibration under long-duration heavy load. The heavy-duty alloy cast housing resists impact, sand and dust erosion in harsh mining sites.
The advanced multi-composite sealing structure can withstand frequent pressure fluctuations and wide temperature changes to prevent hydraulic oil leakage. Every finished fan motor passes bench tests of pressure resistance, speed regulation performance and sealing inspection before delivery. The flange mounting interface fully matches the original assembly for direct replacement without modification.

product parameters

Part No：708-7W-00140
Product Type：Variable Speed Hydraulic Cooling Fan Motor
Applicable Equipment：Komatsu D155A-6 Bulldozer
Core Technology：Proportional solenoid valve stepless speed control
Rated Working Pressure：23 MPa
Max Instantaneous Peak Pressure：27 MPa
Rated Speed：1900 rpm
Max Allowable Speed：2500 rpm
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-25℃ ~ +110℃
Sealing Type：Multi-composite high pressure seal
Main Material：Alloy cast housing, hardened rotor, heavy-duty bearing
Installation Method：Flange mounting
Interchangeability：Interchangeable with 708-7W-11520
Application：Radiator fan drive for large bulldozer engine cooling system

Applicable Models

This hydraulic fan motor is aftermarket replacement spare part:
• Komatsu D155A-6, D155A-6R bulldozer
• Komatsu D155AX-6 bulldozer
• Komatsu D275A-5R, D275AX-5E0 bulldozer

Application Scenarios

This fan motor is engineered for heavy-duty large bulldozer operation scenarios:
• Open-pit mining: Overburden stripping and bulk material pushing under high temperature.
• Large earthmoving project: Mass land shaping and foundation excavation.
• Dam construction: Long-cycle continuous pushing operation.
• Quarry site: Hard rock moving and site leveling with heavy dust.
• Land reclamation project: All-day non-stop heavy load construction.

advantage

• Equipped with proportional solenoid valve for stepless fan speed adjustment according to coolant and hydraulic oil temperature, cutting power loss and reducing fuel consumption during partial load operation.
• Precision hardened rotor and heavy-duty bearing assembly ensure stable rotation performance, resist impact and dust abrasion, extending service life in harsh mining working environments.
• High-strength alloy cast housing has excellent shock resistance, protecting internal core components from gravel impact and external mechanical damage.
• Multi-layer composite sealing system maintains stable sealing performance under frequent pressure spikes and temperature variation, greatly reducing risks of internal leakage and external oil seepage.
• Good interchangeability with alternative part number 708-7W-11520, bringing flexible spare parts stocking and convenient inventory management for distributors and maintenance service providers.
• Standard flange installation dimensions match original equipment perfectly, supporting direct on-site replacement without machining modification, shortening machine downtime and improving overall construction efficiency.

FAQ 

Q1: Which bulldozer does 708-7W-00140 fan motor fit?
A1: It mainly fits Komatsu D155A-6, D155A-6R and D155AX-6 bulldozers, also compatible with D275A-5R and D275AX-5E0. Confirm machine serial number before purchase.

Q2: What symptoms indicate that the fan motor needs replacement?
A2: Fan rotation abnormal noise, fan speed fails to adjust with temperature, oil leakage from motor housing, and engine overheating under heavy load.

Q3: What is the interchangeable part number of this fan motor?
A3: 708-7W-00140 can be replaced by 708-7W-11520 for the same applicable bulldozer models.

Q4: What preparations should be done before fan motor installation?
A4: Release residual hydraulic pressure, clean hydraulic pipeline, check hydraulic oil and filter status. After assembly, bleed air from hydraulic circuit and test fan speed regulation function.

Q5: The engine still overheats after fan motor replacement, what should be checked?
A5: Check radiator clogging, hydraulic oil quality, solenoid signal, fan blade damage and water pump condition. Overheating failure may not be caused by the fan motor alone.

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