Description
708-7S-00550 Fan Motor Assembly by Tatan Overview
The 708-7S-00550 Fan Motor assembly manufactured by Tatan is a heavy-duty variable-displacement axial piston hydraulic unit belonging to our Hydraulic Motor Assembly classification. Engineered specifically for Komatsu WA380-6, WA380Z-6, and WA430-6 wheel loaders, replacing your worn cooling motor with a Tatan complete assembly eliminates engine overheating shutdowns, restores full 1,850 RPM radiator airflow, and cures internal casing pressure bypass across demanding aggregate quarry, batching plant, and earthmoving applications.
Driven by the loader’s hydraulic fan pump and circulating fluid to maintain thermal equilibrium for the SAA6D107E-1 diesel engine and WA380-6 main control valve, every factory-calibrated 708-7S-00550 Fan Motor incorporates precision micro-lapped bimetal valve plates, high-speed balanced rotating groups, and an integrated reversing purge valve block, ensuring 100% direct bolt-on installation with radiator shrouds and chassis hydraulic hard lines.
Key Attributes & Technical Parameters for 708-7S-00550 Fan Motor
| Product Category | Hydraulic Fan Motor Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Komatsu 708-7S Reversible Cooling Fan Motor | Brand Name | Tatan |
| Compatible Equipment | Komatsu WA380-6 | WA380Z-6 | WA430-6 | OEM Part Number | 708-7S-00550 / 708-7S-00530 |
| Matched Engine Series | Komatsu SAA6D107E-1 Common Rail (143 kW) | Place of Origin | Guangdong, China |
| Max Operating Pressure | 20.6 – 24.5 MPa (210 – 250 bar) | Rated Fan Speed | 1,750 – 1,850 RPM Max |
| Spool Precision Spec | Micro-Lapped < 0.003 mm Clearance | Quality Status | 100% Brand New Assembly with Solenoids |
| Machinery Test Report | Provided (100% Bench RPM Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | ISO VG 46 / VG 68 Anti-Wear Oil | Packaging | Export Wooden Box Packaging |
Supported Construction Machinery Brands & Cooling Motor Coverage
In addition to Komatsu, Tatan manufactures and supplies replacement hydraulic fan motors, fan drive pumps, and thermostatic control valves for major heavy equipment builders:
Heavy Wheel Loader Hydraulic Cooling Engineering & Temperature Regulation Standards
Operating 18-ton wheel loaders in hot aggregate batching plants requires active hydrostatic cooling control. When repowering with the 708-7S-00550 Fan Motor, Tatan supplies heavy-duty hydraulic fan drives built with micro-lapped bimetal valve plates, high-speed balanced pistons, and automatic reversing dust purge valves across global earthmoving fleets:
❄️ High-RPM Airflow Delivery
Precision hydraulic rotary groups deliver 1,850 RPM fan speed, stabilizing radiator and torque converter temperatures.
🔄 Reversible Core Purge
Integrated directional solenoid valves reverse fan rotation on command to blow compacted silica dust out of cooling fins.
🛡️ Zero Seal Blowout
Reinforced internal case drain relief channels eliminate shaft seal extrusion caused by high-pressure motor surges.
Application Scenarios & Buyer Value
When upgrading or replacing your wheel loader cooling system with our 708-7S-00550 Fan Motor, buyers achieve maximum operational uptime and thermal control:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Komatsu WA380-6 Motor Replacement | 1:1 direct bolt-on installation eliminates overheating engine derating and restores full radiator cooling efficiency. |
| Hydraulic Overhaul Workshops | Avoids the complex labor of internal bore lapping and seal setting; saves mechanic hours with a pre-adjusted unit. |
| Quarry & Aggregate Batching Plants | Reversible purge function prevents radiator core clogging from cement dust and crushed stone fines. |
| Heavy Equipment Parts Stockists | Fast-moving, high-demand 18-ton loader fan motor inventory ready for immediate shipment to minimize customer downtime. |
708-7S-00550 Fan Motor OEM Diagnostic & Troubleshooting Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot hydrostatic cooling fan symptoms on your Komatsu WA380-6 wheel loader:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Engine coolant & oil overheat (> 100°C) under load | Fan motor bimetal valve plate micro-scoring or cylinder barrel face wear allowing high-pressure fluid bypass to case drain, dropping fan speed below 1,000 RPM. | Replace with Tatan 708-7S-00550 complete fan motor assembly to restore full 1,850 RPM rated cooling airflow. |
| 2. Reverse dust purge function fails to blow debris | Directional reversing solenoid spool jammed by varnished oil or internal check valve seat wear preventing reverse flow. | Verify 24V reversing solenoid coil resistance (20-30 Ω), flush valve galleries, or install fresh pre-tested Tatan motor. |
| 3. Hydraulic oil spray from front shaft seal into radiator | Case drain backpressure exceeding 0.2 MPa due to pinched drain hose, blowing the high-pressure Viton shaft lip seal. | Inspect case drain line for restrictions; install brand-new Tatan factory-sealed fan motor with reinforced seal retaining rings. |
| 4. Screeching whining noise & vibration from fan shroud | Piston slipper shoe retaining plate wear or cradle bearing cavitation damage from aerated hydraulic oil. | Check hydraulic tank oil level, flush cooling lines, and bolt on a new balanced Tatan 708-7S hydraulic fan motor. |
Transport Packaging & Certified Manufacturing Standards
Precision hydraulic motors require zero-vibration transit and absolute cleanliness. Every Tatan 708-7S-00550 Fan Motor shipment undergoes anti-rust oiling, waterproof plastic sealing, and solid export wooden box packaging:
708-7S-00550 Fan Motor FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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