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RITO Swing Device Assembly 4394900 EX2500 4386700 Excavator 4439384 Swing Reduction Gearbox Slewing Device Swing Drive Motor

RITO Swing Device Assembly 4394900 EX2500 4386700 Excavator 4439384 Swing Reduction Gearbox Slewing Device Swing Drive Motor

Facing swing gearbox wear, unstable rotation, or reduced slewing efficiency in EX2500 excavator fleets? For mining contractors, heavy equipment suppliers, and maintenance specialists, dependable swing systems are critical for maintaining productivity and reducing costly downtime. RITO Swing Device Assembly 4394900 EX2500 provides stable torque transmission and efficient hydraulic power conversion for smooth and reliable excavator swing operation in heavy-duty environments.

Item NO.:
4394900
Order(MOQ):
1
Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPAL
Product Origin:
JAPAN
Lead Time：
2-3 DAYS

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Product Details

Compared with standard aftermarket swing devices, it improves gear engagement stability, reduces mechanical power loss, and maintains consistent performance during continuous high-load excavation cycles. Designed for OEM/OEM-equivalent replacement supply, it supports bulk procurement and reliable compatibility across mining, quarrying, and large-scale earthmoving applications.

Product Specifications

Item	Parameter Details
Main Part Number	4394900
Cross OEM PN	4386700, 4439384
Full Product Name	Excavator Swing Device Assembly, Swing Reduction Gearbox & Slewing Drive Motor Unit
Compatible Brand	HITACHI
Applicable Excavator Model	EX2500 Super-Giant Open-Pit Mining Excavator
Application	Upper body slewing rotary hydraulic drive system for super-large hard rock overburden stripping mining projects
Raw Material	Extra thick high-strength alloy steel + oversized heavy wear-resistant bronze friction accessories
Surface Coating	Matte anti-rust industrial metallic gray coating
Operating Temperature Range	-22℃ ~ +58℃
Core Function	Convert ultra-high-pressure heavy hydraulic power into stable super-heavy slewing torque to drive giant excavator upper body rotation for mountain stripping, mass hard rock excavation and super-large aggregate mining loading works
Product Condition	100% New Aftermarket / OEM Replacement / Remanufactured Optional
Export Packaging	Reinforced ultra-thick solid wooden mine-grade case / Heavy-duty industrial carton / Neutral packing / Customized super-large mine export package

Key Features & Advantages

High-Torque Reduction Performance

Provides stable swing output for large excavator upper structure rotation.

Precision Gear Transmission System

Helps improve power transfer efficiency and reduce internal wear.

Heavy-Duty Excavation Design

Built for long-hour operation in demanding mining and construction environments.

OEM-Compatible Assembly Standard

Matches 4394900 / 4386700 / 4439384 specifications for EX2500 systems.

FAQ

Q: What are the typical symptoms of an EX2500 swing device assembly failure?
A: Slow upper structure rotation, abnormal gearbox noise, uneven movement, and reduced swing torque may indicate internal wear.

Q: What should be checked before replacing a 4394900 swing device assembly?
A: Inspect hydraulic oil quality, verify mounting accuracy, and check connected swing components before installation.

Q: How does a swing reduction gearbox improve excavator operation?
A: It reduces motor speed while increasing output torque, allowing smoother and more controlled upper structure rotation.

Q: What factors can influence the service life of an EX2500 swing drive system?
A: Heavy workloads, hydraulic contamination, insufficient maintenance, and harsh operating environments can accelerate component wear.

Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies

Related Tags :

4394900

Swing Motor

Hitachi Swing Motor

EX2500 Swing Motor

Hydraulic Swing Motor

Excavator Slewing Motor

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Subject : RITO Swing Device Assembly 4394900 EX2500 4386700 Excavator 4439384 Swing Reduction Gearbox Slewing Device Swing Drive Motor

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