Heavy equipment fleet managers running Caterpillar E320D2 excavators encounter declining slew precision and gradual hydraulic output reduction during high-duty-cycle operations. The 378-9517 swing gearbox directly addresses these performance gaps, restoring responsive swing control and sustained job-site efficiency.
Item NO.:
378-9517Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockProduced to OEM-equivalent precision for seamless bolt-up replacement, the 378-9517 ensures steady high-torque rotary motion, restrains internal mechanical loss, and pushes out major service milestones.
| Part Number | 378-9517 |
|---|---|
| Part Name | E320D2 E320D E323 Excavator Swing Gearbox Assembly |
| Compatible Brand | CATERPILLAR |
| Applicable Models | E320D2, E320D, E323 Excavator |
| Application | Excavator upper structure slewing hydraulic drive system |
| Material | High-strength forged alloy steel housing |
| Product Color | Matte industrial gray with anti-rust coating |
| Working Temperature | -25°C ~ +60°C |
| Key Function | Converts high-pressure hydraulic fluid into controlled rotary torque |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Provides powerful and stable rotary force for E320D2, E320D, and E323 excavator upper structure rotation and swing operations.
Converts hydraulic pressure into controlled rotary movement for smooth and precise swing operation.
Provides stable speed reduction, increased torque output, and efficient power transmission under heavy-duty excavation conditions.
Matches 378-9517 specifications for CATERPILLAR E320D2 series excavator hydraulic swing systems.
FAQ
Q: What are the common symptoms of a failing 378-9517 swing gearbox?
A: Noticeable warning signs comprise unsteady or delayed swing operation, the upper carriage drifting, harsh metallic grinding from the slewing drive, and gradual loss of rotary force during loaded swings.
Q: What should be checked before installing the 378-9517?
A: Verify gearbox oil cleanliness, confirm system alignment matches Caterpillar factory specifications, inspect mounting surface flatness, and flush the drive circuit thoroughly.
Q: Is this 378-9517 a genuine OEM or aftermarket part?
A: This is a 100% new aftermarket assembly manufactured to OEM specifications. RITO HYDRAULIC is a listed supplier to major Chinese excavator OEMs and Fortune 500 companies.
Q: How to confirm the 378-9517 fits my excavator model?
A: Cross-check your existing part number against 378-9517. This assembly fits E320D2, E320D, and E323 excavators. Contact our technical team with your serial number for compatibility confirmation.
Q: What quality options are available?
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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