Excavator fleet maintenance teams handling Caterpillar E305 and E304C compact excavator models often encounter progressive swing gearbox degradation, resulting in delayed rotary response and erratic upper-structure positioning during repetitive excavation cycles. The 170-8873 swing gearbox assembly directly addresses these performance deficits, restoring stable slewing dynamics and sustained operational reliability on tight-access job sites.
Item NO.:
170-8873Order(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 170-8873 ensures steady high-torque rotary motion, restrains internal mechanical loss, and pushes out major service milestones - equipping global spare parts dealers and heavy construction equipment fleets.
| Part Number | 170-8873 |
|---|---|
| Part Name | E305 E304C E306 Excavator Swing Gearbox Assembly |
| Compatible Brand | CATERPILLAR |
| Applicable Models | E305, E304C, E306 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 E305, E304C, and E306 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 170-8873 specifications for CATERPILLAR E305 series excavator hydraulic swing systems.
FAQ
Q: What are the common symptoms of a failing 170-8873 swing assembly?
A: Key indicators include unresponsive or uneven swing function, the superstructure continuing to rotate after the control stick centers, harsh grinding or rattling from the drive casing, and progressive loss of rotary power under working loads.
Q: What should be checked before installing the 170-8873?
A: Confirm gearbox oil achieves required cleanliness rating, validate the circuit pressure against Caterpillar OEM data, ensure the mounting pad is level and threaded bores are free of debris, and flush the entire drive loop to purge any contaminant particles.
Q: Is this 170-8873 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 170-8873 fits my excavator model?
A: Cross-check your existing part number against 170-8873. This assembly fits E305, E304C, and E306 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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