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RITO 4334276 Swing Motor Assembly EX400-3 9133435 9138912 Excavator Hydraulic Slewing Motor Rotary Drive Unit Swing Drive Motor

RITO 4334276 Swing Motor Assembly EX400-3 9133435 9138912 Excavator Hydraulic Slewing Motor Rotary Drive Unit Swing Drive Motor

Facing swing system wear, hydraulic instability, or rotary drive failure in EX400-3 heavy excavators? For mining operators, wholesalers, and large equipment service teams, downtime in high-tonnage machines leads to significant productivity loss. RITO 4334276 Swing Motor Assembly EX400-3 delivers strong torque output and stable hydraulic-to-rotational conversion for reliable 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 provides enhanced gear strength, improved load resistance, and stable operation under continuous mining cycles. Designed for EX400-3 systems, it supports OEM/OEM-equivalent supply, bulk procurement, and reliable compatibility across mining, quarrying, and large-scale earthmoving applications.

Product Specifications

Part Number	4334276 / 9133435 / 9138912
Part Name	Excavator Hydraulic Slewing Motor & Rotary Swing Drive Unit Assembly Swing Drive Motor
Compatible Brand	HITACHI
Applicable Models	EX400-3 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 mine rock digging, mountain stripping 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

High-Torque Swing Performance

Ensures stable rotation under extreme load conditions.

Precision Hydraulic Conversion System

Improves efficiency from hydraulic power to rotary motion.

Reinforced Heavy-Duty Structure

Built for mining-grade continuous operation and high-impact environments.

OEM-Compatible Assembly Standard

Matches 4334276 / 9133435 / 9138912 specifications for EX400-3 systems.

FAQ

A: It is commonly caused by hydraulic pressure loss, internal valve wear, or gear wear inside the motor assembly.

Q: What should be checked before installing a 4334276 swing motor assembly?
A: Inspect hydraulic oil cleanliness, confirm mounting alignment, and ensure system pressure stability.

Q: How can abnormal vibration in a swing motor be diagnosed?
A: It is often linked to bearing wear, uneven gear meshing, or inconsistent hydraulic flow distribution.

Q: What operating conditions most affect EX400-3 swing drive lifespan?
A: Continuous mining overload, poor filtration, abrasive dust exposure, and extreme temperature variations significantly reduce durability.

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

9133435 Swing Motor

Hitachi Swing Motor

EX400-3 Swing Motor

Hydraulic Swing Motor

Swing Device Assembly

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Subject : RITO 4334276 Swing Motor Assembly EX400-3 9133435 9138912 Excavator Hydraulic Slewing Motor Rotary Drive Unit Swing Drive Motor

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