Model 708-7S-00550 hydraulic fan motor is a core cooling spare part for Komatsu WA6 series wheel loaders, compatible with WA380-6, WA430-6, WA450-6, WA470-6, WA480-6. It drives the radiator fan with variable hydraulic speed to stabilize engine temperature and prevent overheat breakdowns. Manufactured with heavy-duty cast iron housing and leak-proof seals, it matches OEM dimensions for direct plug-and-play replacement. Every unit passes strict pressure and aging tests for reliable performance under heavy construction working conditions.
CHINA
◆BRAND NAME
HYH
◆MODEL NUMBER
708-7S-00550
◆MINIMUM ORDER QUANTITY
1SET
◆PACKAGING DETAILS
PAPER AND WOODEN PACKING
◆DELIVERY TIME
1-4WORKING DAYS
◆PAYMENT TERMS
T/T, WESTERN UNION, L/C
Product Overview
This remanufactured cooling fan motor Part Number 708-7S-00550 is a direct OEM replacement hydraulic component exclusively for Komatsu construction machinery. As the core part of the equipment cooling system, it drives the radiator fan with variable hydraulic speed to control heat dissipation of engine and hydraulic system, effectively solving overheating failure during heavy-load mining, road construction and earthmoving work.
All remanufactured fan motors are fully disassembled, worn internal parts replaced, shell polished and sealed renewed, then pass strict leakage, pressure resistance and continuous aging tests before delivery. It matches the original installation size perfectly, plug-and-play without modification, a cost-effective alternative to brand-new original parts.
Product Highlights
✅ Cost-Effective Remanufactured Solution
We replace all worn valve plates, bearings and oil seals with brand-new high-precision accessories, restore full performance at a much lower price than original new fan motors, greatly cutting your machinery maintenance budget.
✅ 1:1 OEM Matching Size
Consistent flange size, shaft diameter, oil port position and installation hole layout with original 708-7S-00550, no cutting, drilling or refitting required, fast on-site replacement within 30 minutes.
✅ Stable Variable Speed Heat Dissipation
Hydraulic variable speed design automatically adjusts fan RPM based on equipment working load, balances cooling efficiency and fuel consumption, avoids high-temperature shutdown and engine damage under long-time heavy duty.
✅ Heavy-Duty Anti-Leakage Structure
Multi-layer high-temperature resistant oil seals are installed during refurbishment, the cast iron housing is polished and anti-rust treated, effectively preventing hydraulic oil leakage in dusty, high-temperature construction sites.
✅ Strict Factory Testing
Every remanufactured fan motor undergoes 3 professional tests: hydraulic leakage test, high-pressure endurance test, 2-hour continuous running aging test to guarantee stable long-term operation.
✅ Wide Compatibility
Covers multiple sub-models of Komatsu WA6 series wheel loaders and GD675-3A motor grader, one part meets the repair demand of multiple devices, convenient for spare parts inventory management.
Applications:
Fit For Komatsu Loader: WA380-6, WA430-6, WA430-6E0, WA450-6, WA450-6-W1, WA470-6, WA470-6 LC, WA470-6A, WA470-6R, WA480-6, WA480-6 LC
Fit For Komatsu Motor Grader: GD675-3A
Condition: Brand new
Other model specifications
| 708-7S-00550 | 708-7S-00352 | 708-7S-00720 | 708-7W-00021 | 708-7W-00230 |
| 708-7W-00220 | 708-7W-00140 | 708-1W-00882 | 708-1W-00741 | 708-1U-00171 |
| 709-1T-00710 | 708-7W-00160 | 708-7W-00130 | 708-7S-00820 | 708-7W-00350 |
| 708-7W-00320 | 708-7T-00710 | 708-7H-00650 | 708-7S-00671 | 708-7S-00710 |
| 708-7R-00690 | 708-7R-00700 | 708-7R-00710 | 708-7R-04160 | 708-7R-11210 |
| 708-7W-00120 | 708-7W-00130 | 708-7W-00220 | 708-7W-00330 | 708-7W-11520 |
| 708-7W-00160 | 708-7W-00021 | 419-03-33242 | 708-7S-00550 | 708-7S-00610 |
| 708-7S-00710 | 708-7S-00740 | 708-7S-01330 | 708-7S-00352 | 708-7H-00650 |
| 708-7H-00680 | 708-7H-11410 | 708-7S-00350 | 708-7S-00351 | 708-7S-00352 |
| 708-7W-00140 | 708-8F-00111 | 708-8F-00171 | 708-8F-00192 | 708-8F-00211 |
| 708-8F-00250 | 708-8F-33310 | 708-7S-00420 | 708-7S-00430 | 708-7W-00410 |
708-7W-0042 | 708-8F-33310 | 708-8F-33320 | 708-8F-33330 | 708-8F-33340 |
| 708-8F-33350 |
Item | Specification |
|---|---|
Part Number | 708-7S-00550 / 7087S00550 |
Product Type | Electro-proportional variable hydraulic fan motor |
Displacement | Max 45cc/rev (variable) |
Rated Working Pressure | 180 Bar (18MPa) |
Peak Pressure | 245 Bar (24.5MPa) |
Control Voltage | DC 12V (built-in solenoid valve) |
Max Fan Speed | 2800 RPM |
Shaft Type | OEM standard spline threaded shaft |
Mounting Method | 6-hole OEM matching flange, direct replacement |
Housing Material | Reinforced cast iron |
Net Weight | 14.8 KG |
Compatible Equipment | Komatsu WA380/430/450/470/480-6 series loader & GD675-3A grader |
Factory Test Standard | Pressure leakage test, full-load aging test before delivery |
Specifications:
Item | Detailed Specification |
|---|---|
Part Number | 708-7S-00550 / 7087S00550 |
Product Name | Hydraulic Variable Speed Cooling Fan Motor |
Product Type | Electro-proportional hydraulic variable piston motor |
Displacement | Max 45cc/rev (stepless variable) |
Rated Working Pressure | 180 Bar / 18MPa |
Max Peak Pressure | 245 Bar / 24.5MPa |
Control Mode | DC 12V built-in solenoid valve electro-hydraulic proportional control |
Max Fan Rotating Speed | 2800 RPM |
Shaft Specification | OEM standard spline threaded shaft, perfect fan hub matching |
Mounting Standard | 6-hole OEM integral flange, 1:1 original size, direct plug-and-play replacement |
Housing Material | High-strength reinforced cast iron, anti-rust and anti-deformation |
Sealing System | Multi-layer high-temperature resistant fluorine rubber seals, zero leakage |
Net Weight | 14.8 KG |
Working Temperature Range | -20℃ ~ +95℃ (hydraulic oil working temperature) |
Compatible Models | Komatsu WA380-6, WA430-6, WA430-6E0, WA450-6, WA450-6-W1, WA470-6, WA470-6 LC/A/R, WA480-6, WA480-6 LC Wheel Loader; GD675-3A Motor Grader |
Factory Inspection Standard | 20MPa 30-minute pressure holding leakage test, 2-hour full-load aging operation test, 100% speed regulation performance test |
Core Feature | Automatic speed adjustment with load, energy-saving and low noise, effectively prevent equipment high-temperature shutdown |
No. 173, Xiacuo, Sihuang Village, Xiamei Town, Nan 'an City, Fujian Province