708-7R-00710/708-7R-00830 Hydraulic Fan Motor For Komatsu WA320-6 wheel loader

708-7R-00710/708-7R-00830 Hydraulic Fan Motor For Komatsu WA320-6 wheel loader Featured Image
  • 708-7R-00710/708-7R-00830 Hydraulic Fan Motor For Komatsu WA320-6 wheel loader

Short Description:

The 419-03-33242 hydraulic fan motor fits Komatsu WA320-5 and WA320L-5 wheel loaders, serving as the core drive component of the equipment cooling system.

Product Detail

Product Tags

description

This piston-type hydraulic fan motor adopts integrated proportional control structure, specially optimized for the heat dissipation requirement of WA320-6 engine. Different from WA320-5 fixed displacement fan motor, this -6 generation model adds an electronic proportional control module, which receives temperature signal from machine ECU to realize stepless speed regulation of fan. It can raise fan speed rapidly under high temperature and reduce rotation speed in light load to cut power loss and lower fuel consumption. The valve body and motor housing are cast as one piece, improving structural rigidity and reducing leakage risk. Internal piston assembly uses high-strength alloy material with precision grinding process, featuring excellent wear resistance and fatigue resistance. The imported multi-stage sealing combination resists high temperature and hydraulic oil corrosion. Every finished unit undergoes hydraulic bench test including pressure, speed regulation and leakage inspection before delivery. Original mounting hole and oil port layout support direct replacement without modification.

product parameters

Part No：708-7R-00710 / 708-7R-00830
Product Type：Piston Hydraulic Fan Motor with Electronic Proportional Control
Applicable Equipment：Komatsu WA320-6, WA320PZ-6 Wheel Loader
Structural Feature：Integrated valve body + motor, built-in proportional solenoid valve
Theoretical Displacement：42 cc/rev
Rated Working Pressure：24 MPa (240 bar)
Max Instantaneous Peak Pressure：27 MPa (270 bar)
Rated Working Speed：2400 rpm
Max Allowable Speed：2900 rpm
Starting Torque：≥52 N·m
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +110℃
Leakage Standard：Zero visible leakage under rated pressure
Main Material：Integrated cast iron housing, hardened alloy piston assembly, multi-stage FKM composite seal
Installation Method：Standard flange installation
Interchangeability：708-7R-00710 and 708-7R-00830 fully interchangeable

advantage

• 42cc piston structure with electronic proportional control, supports ECU stepless fan speed adjustment, matching WA320-6 emission-compliant engine heat characteristics.
• Integrated cast iron housing enhances overall rigidity, reduces vibration deformation and joint oil leakage under continuous heavy load.
• Hardened alloy piston assembly delivers outstanding wear resistance, stable performance even with minor hydraulic oil contamination on construction sites.
• Multi-stage FKM sealing system withstands high temperature and oil aging, effectively preventing internal leakage and shaft oil seepage.
• Intelligent speed adjustment reduces unnecessary power consumption, lowers fuel cost while keeping coolant and hydraulic oil temperature stable.
• 708-7R-00710 and 708-7R-00830 are fully interchangeable, OEM mounting dimension for direct bolt-on replacement, no pipeline modification required.
• Each unit passes full-condition bench tests for pressure response and speed regulation, guaranteeing consistent performance in long-term mining and earthwork work.

FAQ 

Q1: Which equipment does 708-7R-00710 /708-7R-00830 fan motor fit?
A1: This hydraulic fan motor is specially applicable to Komatsu WA320-6 and WA320PZ-6 wheel loader. It is recommended to confirm the equipment serial number before purchasing to ensure accurate matching.

Q2: What is the core function of this fan motor?
A2: It is the core power component of the loader cooling system. It converts hydraulic energy into mechanical energy to drive the radiator fan. Controlled by machine ECU signal, it realizes stepless speed adjustment, precisely controls engine coolant temperature and hydraulic oil temperature to prevent equipment overheating during heavy-load continuous operation.

Q3: What are the typical failure symptoms of aging or worn fan motor?
A3: Common faults include fan speed cannot rise when temperature increases, poor heat dissipation leading to high water temperature and high oil temperature; unstable fan rotation with jitter; abnormal noise inside the motor; proportional valve failure causing speed regulation failure; internal hydraulic leakage causing weak fan power, and external oil seepage of the shaft seal.

Q4: WA320-6 still overheats after fan motor replacement, what are the possible reasons?
A4: Overheating may not only come from fan motor failure. Check radiator core blockage, hydraulic system working pressure, blocked filter element, air trapped in hydraulic circuit, fan impeller damage, and also check ECU temperature sensor and proportional solenoid signal to eliminate electrical faults.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

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