708-7S-00350 Fan Motor For Komatsu D65EX / D65PX series bulldozers

708-7S-00350 Fan Motor For Komatsu D65EX / D65PX series bulldozers Featured Image
  • 708-7S-00350 Fan Motor For Komatsu D65EX / D65PX series bulldozers

Short Description:

708-7W-00230 is a variable hydraulic cooling fan motor designed for Komatsu HM400 series articulated dump trucks.

Product Detail

Product Tags

description

This hydraulic fan motor adopts built-in proportional solenoid valve to achieve stepless speed regulation, matching cooling capacity with bulldozer working load dynamically. Internal piston, rotor and heavy-duty bearing components are processed by precision grinding technology, minimizing running friction and maintaining low vibration, low-noise rotation under long hours of pushing and grading cycles. High-strength alloy cast housing features excellent rigidity, capable of resisting heavy impact, rock debris, dust and mud accumulation on rough construction ground. It is equipped with multiple groups of composite high-pressure sealing assemblies, coping with frequent hydraulic pressure fluctuations and wide ambient temperature variation all year round, effectively preventing hydraulic internal leakage and external oil seepage. All finished fan motors go through 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：708-7S-00350
Interchangeable Part No：708-7S-00351,708-7S-00352
Product Type：Variable Speed Hydraulic Cooling Fan Motor
Applicable Equipment：Komatsu D65EX-16 / D65PX-16 / D85EX-15 Bulldozer
Core Technology：Proportional solenoid valve stepless intelligent speed control
Motor Displacement：16 cc/rev
Rated Working Pressure：22.5 MPa
Max Instantaneous Peak Pressure：26 MPa
Rated Speed：1800 rpm
Max Allowable Speed：2300 rpm
Min Idle Speed：500 rpm
Rated Output Torque：41 N・m
Speed Response Time：≤0.35s
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-25℃ ~ +110℃
Applicable Altitude：≤3000m
Sealing Type：Multi-composite high pressure wear-resistant seal
Internal Leakage Standard：≤1.4 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 bulldozer engine and hydraulic system cooling

Applicable Models

This hydraulic fan motor is aftermarket replacement spare part:
・Komatsu D65EX-16 Bulldozer
・Komatsu D65PX-16 Bulldozer
・Komatsu D85EX-15 Bulldozer

Application Scenarios

This fan motor is designed for bulldozer heavy-duty earthmoving scenarios:
・Open-pit mine: Continuous rock pushing, site leveling and stockpile shaping under high temperature and dusty mine environment.
・Land reclamation project: Large-area ground leveling, bulk soil stripping and backfill operation.
・Road construction: Roadbed excavation, compaction preparation and slope trimming work.
・Quarry site: Waste rock pushing, yard tidying and material stacking.
・Dam & water conservancy project: Heavy-duty earth moving under muddy and wet field conditions.

advantage

・Built-in proportional solenoid valve automatically adjusts fan speed according to coolant and hydraulic oil temperature, reduces unnecessary power loss and cuts fuel consumption during light-load standby and idle grading work.
・Precision hardened rotor and heavy-duty bearing assembly maintain stable rotary performance, resist abrasive wear from rock dust, soil and mud particles, extending service life under long-time continuous bulldozing cycles.
・High-strength alloy cast housing features excellent shock resistance, protecting internal core components from collision damage caused by flying stones and hard ground impact.
・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.
・Good interchangeability with alternative part numbers 708-7S-00351 and 708-7S-00352, helping distributors and field maintenance teams simplify spare parts inventory management.
・Standard flange mounting dimensions fully match original installation position, supporting direct on-site replacement without machining modification, reducing machine downtime and improving earthmoving project progress.

FAQ 

Q1: Which bulldozer does 708-7S-00350 fan motor fit?
A1: It mainly fits Komatsu D65EX-16, D65PX-16 bulldozer, also compatible with D85EX-15 bulldozer, interchangeable with 708-7S-00351 and 708-7S-00352. 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 runs with obvious abnormal noise, fan speed cannot respond to temperature changes, motor housing oil leakage, engine overheating under continuous heavy pushing work. If these symptoms gradually worsen during field operation, 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 solenoid 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.

our warehouse

our warehouse

Pack and ship

Pack and ship


  • Previous:
  • Next:
    • Write your message here and send it to us

    Products categories