Products

Home

Products

Hitachi series

RITO Excavator Swing Reduction Gearbox 4334276 EX400LCH-3 9133435 9138912 Rotary Motor Assembly Slewing Drive Unit Swing Gear

RITO Excavator Swing Reduction Gearbox 4334276 EX400LCH-3 9133435 9138912 Rotary Motor Assembly Slewing Drive Unit Swing Gear

Facing swing gearbox wear, hydraulic instability, or rotary drive failure in EX400LCH-3 fleets? For mining operators, wholesalers, and heavy equipment maintenance teams, downtime in large excavators leads to significant productivity loss and higher service costs. RITO Excavator Swing Reduction Gearbox 4334276 EX400LCH-3 delivers stable torque transmission and efficient hydraulic-to-mechanical 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

Inquire Now

Product Details

Compared with standard aftermarket swing gearboxes, it improves gear meshing precision, reduces internal backlash, and maintains stable performance under continuous mining cycles. Designed for OEM/OEM-equivalent supply, it supports bulk procurement and consistent compatibility across mining, quarrying, and large-scale earthmoving operations.

Product Specifications

Part Number	4334276 / 9133435 / 9138912
Part Name	Excavator Swing Reduction Gearbox & Rotary Slewing Drive Unit Swing Gear Motor Assembly
Compatible Brand	HITACHI
Applicable Models	EX400LCH-3 Heavy Mining Excavator
Application	Large mining 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 Power Conversion

Improves energy transfer from hydraulic system 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 EX400LCH-3 systems.

FAQ

Q: What causes unstable swing rotation in EX400LCH-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 gearbox 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 EX400LCH-3 swing drive lifespan?
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

Excavator Swing Motor

Hitachi Swing Motor

EX400LCH-3 Swing Motor

Hydraulic Swing Motor

Slewing Drive Unit

Leave A Message

If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Subject : RITO Excavator Swing Reduction Gearbox 4334276 EX400LCH-3 9133435 9138912 Rotary Motor Assembly Slewing Drive Unit Swing Gear

Related Products

RITO Excavator Hydraulic Pilot Control Valve ZX350 ZX330 ZX130LCN-3 for HITACHI

Optimize your Hitachi excavator's performance with this premium hydraulic joystick pilot control valve, precision-engineered for ZX350, ZX330, and ZX130LCN-3 models. It delivers smooth, accurate handling and rugged durability for demanding job sites.

RITO ZAXIS75US-3 ZAXIS85USB-3 Hydraulic Oil Pump 9295140 4663831 for Hitachi Excavator

This RITO 9295140 4663831 Hydraulic Pump is a core power component for Hitachi ZAXIS75US-3 and ZAXIS85USB-3 excavators, responsible for converting mechanical energy into stable hydraulic pressure to drive the arm, bucket, and travel systems. It ensures smooth operation, consistent flow output, and reliable performance under demanding construction and mining conditions.

RITO 9285566 9285685 9290597 9290598 ZAXIS120-3 Excavator Main Hydraulic Pump Assy

This RITO 9285566 9285685 9290597 9290598 Hydraulic Pump is a core component for Hitachi ZAXIS120-3 excavators, responsible for converting mechanical energy into stable hydraulic pressure to power the arm, bucket, and travel systems. It ensures smooth operation, precise flow control, and reliable performance in construction and mining environments.

RITO High Quality High Pressure Pump ZAXIS200-3 Excavator Hydraulic Main Pump Assembly 9262319 9262320

This RITO 9262319 9262320 Hydraulic Pump is a core component for Hitachi ZAXIS200-3 excavators, responsible for converting mechanical energy into stable hydraulic pressure to power the arm, bucket, and travel systems. It ensures smooth operation, precise flow control, and reliable performance in construction and mining environments.

RITO Hydraulic Piston Pump 9257345 9257346 Excavator Main Pump for Hitachi ZAXIS270-3

This RITO 9257345 9257346 Hydraulic Pump is a core component for Hitachi ZAXIS270-3 excavators, responsible for converting mechanical energy into stable hydraulic pressure to drive the arm, bucket, and travel systems. It ensures smooth operation, precise flow control, and reliable performance in construction and mining environments.

RITO ZAXIS650LC-3 Hydraulic Pump 9254122 4635645 9254123 0005271 for Heavy Excavator

This RITO 9254122 4635645 9254123 0005271 Hydraulic Pump is a heavy-duty core component for Hitachi ZAXIS650LC-3 excavators, designed to convert mechanical energy into stable, high-pressure hydraulic output for demanding arm, bucket, and travel operations. It ensures smooth power transmission, precise flow regulation, and reliable performance in extreme mining and large-scale construction environments.

RITO ZAXIS600 Excavator Hydraulic Main Pump 9197075 0003954 Hydraulic System Parts

This RITO 9197075 0003954 Hydraulic Pump is a heavy-duty core component for Hitachi ZAXIS600 excavators, engineered to convert mechanical energy into stable, high-pressure hydraulic output for arm, bucket, and travel operations. It ensures smooth power transmission, precise flow control, and reliable performance in demanding mining and large-scale construction environments.

RITO High Performance Hydraulic Main Pump 9195239 9195237 for Hitachi ZAXIS270 ZX270LC ZX280 Excavator Spare Parts

This RITO 9195239 9195237 Hydraulic Pump is a core component for Hitachi ZAXIS270 excavators, designed to convert mechanical energy into stable hydraulic pressure to power the arm, bucket, and travel systems. It ensures smooth operation, precise flow control, and reliable performance in construction and medium to heavy-duty working environments.