Hitachi ZX850LC-3/4658418/Forged Front Idler Wheel Assembly/hot forging of alloy steel/Heavy-duty excavator undercarriage parts manufacture in quanzhou China.
Product Specifications
Premium Undercarriage Component for Mining & Heavy Construction
Product Overview:
The Hitachi ZX850LC-3 Forged Idler Wheel Assembly is a heavy-duty track guidance system component designed specifically for Hitachi's ZX850LC-3 excavator. This OEM-quality forged assembly ensures precise track alignment and optimal weight distribution in extreme operating conditions.
Key Features:
Advanced Forging Technology:
Manufactured from 34CrNiMo6 alloy steel (EN 10083-3 standard)
Hot-forged construction provides superior grain flow and 35% higher impact resistance than cast alternatives
Precision CNC machining ensures ±0.1mm dimensional accuracy
Enhanced Durability:
Induction-hardened flange surfaces (55-58 HRC)
Double-row tapered roller bearings (ISO 355:2017 compliant)
Triple-lip seal system with labyrinth protection (IP69K rated)
Performance Specifications:
Static load capacity: 12,500 kg radial / 5,800 kg axial
Fatigue life: >600,000 cycles (ISO 15653 testing)
Operating temperature range: -40°C to +120°C
Technical Data:
| Parameter | Specification |
|---|---|
| Overall Width | 845mm ±1.5mm |
| Outer Diameter | 800mm ±0.8mm |
| Bearing Bore | 150mm H7 tolerance |
| Weight | 518kg ±2% |
| Bolt Pattern | 8xM24 on 420mm PCD |
Compatibility:
Direct replacement for OEM part number ZX850LC-3(4658418)
Compatible with ZX850LC-3, ZX870LCH-3, and ZX890LC-3 models
Interchangeable with aftermarket references: Berco TRK-850FI, ITM UND-850F
Maintenance Requirements:
Recommended greasing interval: 500 service hours (use Shell Gadus S2 V220 2)
Bearing inspection: Ultrasonic testing every 2,000 hours
Replacement indicators:
Flange wear >15mm
Bearing play >1.2mm
Seal leakage
Installation Guide:
Clean track frame mounting surfaces
Apply anti-seize compound to bolts (Loctite 243 recommended)
Torque sequence:
Initial: 580 N·m
Final: +90° rotation
Adjust track tension to 40-45mm sag
Quality Assurance:
100% magnetic particle inspection (ASTM E1444)
Material certification to EN 10204 3.2
12-month limited warranty
Packaging:
Wooden export crate (1000×800×600mm)
Gross weight: 550kg
Desiccant and VCI protection included
Available Through:
Hitachi Global Parts Network
Authorized undercarriage specialists
Certified aftermarket suppliers
Target Applications:
Mining operations
Heavy construction
Quarrying
Demolition work
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