Facing swing gearbox failure, unstable rotation, or hydraulic torque loss in EX550 fleets? Wholesalers, mining contractors, and heavy equipment repair centers need reliable slewing systems to avoid costly downtime and maintain production continuity. RITO Swing Device Assembly 4289284 EX550 delivers stable torque transmission and precise hydraulic-to-mechanical conversion for ultra-heavy excavator swing operations.
Item NO.:
4289284Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time：
2-3 DAYS
| Part Number | 4289284 / 9110045 |
|---|---|
| Part Name | Excavator Swing Device Assembly, Swing Reduction Gearbox & Slewing Drive Motor Swing Gear Unit |
| Compatible Brand | HITACHI |
| Applicable Models | EX550 Large Excavator |
| Application | Excavator upper body slewing rotary hydraulic drive system |
| Material | High-strength alloy steel + wear-resistant bronze friction accessories |
| Product Color | Matte anti-rust industrial metallic gray |
| Working Temperature | -22℃ to +58℃ |
| Key Function | Convert high-pressure hydraulic power into stable heavy-duty slewing torque to drive excavator upper body rotation for large earthmoving, open-pit ore excavation and bulk mineral loading operations |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |
Ensures smooth and powerful rotation for EX550 heavy-duty excavation cycles.
Matches 4289284 / 9110045 specifications for EX550 swing systems.
Built for extreme load, impact, and continuous operation environments.
Improves swing response and reduces energy loss during operation.
FAQ
Q:What must be checked before installation?
A:Ensure hydraulic system flushing, correct alignment, clean oil condition, and proper torque tightening before assembly.
Q:How to ensure correct model selection?
A:Verify part numbers 4289284 / 9110045 and confirm compatibility with EX550 swing systems.
Q:Can it operate in mining conditions?
A:Yes, it is engineered for high-load, high-impact, and dust-heavy environments such as mining, quarrying, and large-scale excavation operations.
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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