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RITO Swing Device Assembly 4334276 EX400LC-3 9133435 Excavator 9138912 Swing Reduction Gearbox Slewing Device Swing Drive Motor

RITO Swing Device Assembly 4334276 EX400LC-3 9133435 Excavator 9138912 Swing Reduction Gearbox Slewing Device Swing Drive Motor

Facing swing gearbox failure, hydraulic pressure instability, or rotary drive wear in EX400LC-3 fleets? For mining contractors, wholesalers, and heavy equipment service teams, downtime in large excavators leads to significant operational losses. RITO Swing Device Assembly 4334276 EX400LC-3 delivers stable torque transmission and reliable hydraulic-to-mechanical conversion for consistent heavy-duty swing performance.

Item NO.:
4334276
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 assemblies, it improves gear meshing accuracy, reduces internal backlash, and maintains stable performance under continuous mining workloads. Designed for OEM/OEM-equivalent supply, it supports bulk procurement and consistent compatibility across mining, quarrying, and large-scale earthmoving applications.

Product Specifications

Part Number	4334276 / 9133435 / 9138912
Part Name	Excavator Swing Device Assembly, Swing Reduction Gearbox & Slewing Drive Motor Unit
Compatible Brand	HITACHI
Applicable Models	EX400LC-3 Heavy Mining Excavator
Application	Large excavator upper body slewing rotary hydraulic drive system
Material	Thick high-strength alloy steel + heavy-duty wear-resistant bronze friction accessories
Product Color	Matte anti-rust industrial metallic gray
Working Temperature	-22℃ to +58℃
Key Function	Convert high-pressure heavy hydraulic power into stable ultra-heavy slewing torque to drive excavator upper body rotation for mountain stripping, hard rock excavation and large aggregate loading mining projects
Condition	100% New, Aftermarket / OEM Quality
Packaging	Thick Wooden Case / Reinforced Carton / Neutral Packing / Customized Export Package

Key Features & Advantages

Stable Gear Reduction Torque Output

Ensures smooth swing rotation under extreme load conditions.

Efficient Hydraulic Conversion System

Improves energy transfer from hydraulic pressure to rotary motion.

Reinforced Mining-Grade Structure

Built for continuous operation in harsh, high-impact environments.

OEM-Compatible Assembly Standard

Matches 4334276 / 9133435 / 9138912 specifications for EX400LC-3 systems.

FAQ

Q: What causes unstable swing rotation in EX400LC-3 gearbox systems?
A: It is commonly caused by internal gear wear, hydraulic pressure fluctuation, or increased clearance inside the reduction mechanism.

Q: What inspection steps are required before installing a 4334276 swing device assembly?
A: Verify hydraulic oil cleanliness, ensure precise mounting alignment, and confirm system pressure stability.

Q: How can abnormal noise in a swing reduction gearbox be diagnosed?
A: It is often related to bearing damage, gear pitting, or insufficient lubrication inside the gearbox.

Q: What working conditions most affect EX400LC-3 swing drive durability?
A: Continuous overload, poor filtration, abrasive dust exposure, and extreme temperature variations significantly reduce service life.

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

Related Tags :

4334276

9138912 Swing Motor

Hitachi Swing Motor

EX400LC-3 Swing Motor

Swing Drive Motor

Rotary Drive Unit

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Subject : RITO Swing Device Assembly 4334276 EX400LC-3 9133435 Excavator 9138912 Swing Reduction Gearbox Slewing Device Swing Drive Motor

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