Swing slow or gearbox leaking on your DX225LCA? A worn K1038203 swing gearbox loses planetary reduction accuracy, degrading swing speed and putting shock loads on the swing motor output shaft. RITO supplies this robust DX225 swing gearbox assembly to restore precise, torque-stable cab rotation.
Item NO.:
K1038203Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockK1038203 Swing Gearbox for Doosan DX225LCA, DX225LC, DX225 and DX220 excavators. Cross-reference: K1045024 (swing motor assembly). Multi-stage planetary swing reduction gearbox converts swing motor speed to working slew speed. Heat-treated gear elements, precision carrier pin bores and factory-controlled backlash deliver smooth, responsive swing from installation.
| Part Number | K1038203 |
|---|---|
| Part Name | Swing Reduction Gearbox |
| Compatible Brand | Doosan |
| Applicable Models | DX225LCA, DX225LC, DX225, DX220 Excavator |
| Application | Multi-stage planetary swing reduction between hydraulic motor and slew pinion on DX225-series |
| Material | Alloy steel gears, forged carrier, cast housing |
| Product Color | Industrial grey |
| Working Temperature | -30°C~+80°C |
| Key Function | Reduces swing motor speed and multiplies torque for DX225-series upper structure rotation |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Planetary reduction ratio matched to DX225LCA working swing speed for smooth, controlled cab rotation under full load without over-revving the swing motor.
All sun, planet and ring gears carburised to HRC 58-62 for the surface hardness required for millions of DX225 swing cycles without tooth-flank pitting.
Carrier and ring gear assembled to OEM backlash specification, eliminating the cab jolt at swing direction reversal that characterises worn gearboxes.
K1038203 covers DX225LCA, DX225LC, DX225 and DX220 for direct bolt-on replacement across Doosan DX225-series variants.
FAQ
Q: What are the signs the K1038203 swing gearbox needs replacing on DX225LCA?
A: Audible gear noise during swing, cab jolts at direction reversal, swing slower than specification, gearbox oil leaking from seals, and metallic debris in gearbox oil.
Q: What oil should I use in the K1038203 after installation?
A: Use EP 90 or EP 140 gear oil as specified in the Doosan DX225LCA service manual. Change oil after the first 50-hour break-in period to flush assembly residuals.
Q: Does K1038203 include the swing motor?
A: K1038203 is the swing gearbox only. The swing motor is a separate assembly (K1045024 swing motor). Confirm which component requires replacement before ordering.
Q: How to confirm K1038203 fits my DX225LCA?
A: Match existing gearbox part number K1038203, motor flange bolt pattern and output pinion tooth count. Provide machine serial number to our team for cross-reference.
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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