Eaton 2-200DOS-E3888 RB238-61280 rotacijski prijenosnik za Kubota KX41-3 mini bagera
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Component: Hydraulic Swing Motor Device Assembly
Manufacturer Model Number: Eaton 2-200DOS-E3888 (2000 Series Platform)
Kubota OEM Part Number: RB238-61280 (RB23861280)
Machine Compatibility: Kubota KX41-3 Mini Excavator
Condition: Brand New Original / OEM Specification Equivalent
2. Technical Specifications
Type: Geroler / Disc Valve Hydraulic Motor
System Output: Matches the specific displacement, operating pressure, and flow configuration of the Kubota KX41-3 auxiliary swing loop.
Integrated Valve Network: Features built-in dual crossover relief valves and shockless cushion blocks to handle starting and stopping inertia.
Interface Mount: 4-bolt mounting pattern with a precision output spline shaft designed to interface with the factory slew ring reduction gears.
3. Critical Installation Requirements
Motor Case Priming (Mandatory)
Before starting the engine or cycling the hydraulics, manually fill the swing motor housing with clean, fresh hydraulic oil through the highest available case drain port. Running the motor bone-dry for even a few seconds will cause immediate internal scoring and premature failure.
Verify Case Drain Line Clearance
Thoroughly inspect the case drain hose running back to the hydraulic reservoir. Ensure it is entirely free of kinks, tight bends, or internal blockages. Backpressure in this line will immediately blow out the main shaft seal.
Gear Pinion & Slew Ring Lubrication
Thoroughly clean the mounting surface on the excavator chassis. Apply a heavy, even coating of premium quality lithium gear grease to the motor's output shaft pinion and the matching slew ring gear teeth during assembly.
Fluid & Circuit Decontamination
If the previous motor suffered a mechanical breakdown, you must drain the hydraulic reservoir, flush the control valve swing circuit lines, and clean the oil cooler lines. Residual metal particles will rapidly wear down and destroy a new unit.
4. Frequently Asked Questions (FAQ)
Q: Does part number RB238-61280 fit both the conventional tail-swing and zero-tail-swing models?
A: This specific Eaton 2-200DOS-E3888 configuration under Kubota part number RB238-61280 is calibrated for the conventional tail-swing KX41-3. Always confirm your exact machine serial number before ordering to verify cross-compatibility with adjacent models like the U15 or U17.
Q: My KX41-3 swing function shudders heavily or overtravels when I release the joystick. Will this motor fix it?
A: Yes. Shuddering, harsh stopping, or drifting on slopes usually indicates that the integrated dual-cushion relief valves inside the motor housing have scored seats or weakened springs. Replacing the complete device restores exact stopping performance.
Q: Is this swing motor shipped fully assembled?
A: Yes. Our units are delivered as complete, fully integrated assemblies, including the factory-calibrated valve blocks and internal dynamic groups pre-tested for direct plug-and-play installation.
5. Shipping & Logistics
Packaging: Coated with rust-inhibiting storage oil, sealed with heavy-duty port plugs to prevent debris ingress, and packed inside an export-safe protective box.
Transit Time: Global express air freight via DHL/FedEx/UPS typically delivers within 3 to 7 business days directly to your workshop or site.