Eaton 104-6485-005 RG008-61280 swing motor for Kubota KX36-2 mini excavator
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Component: Hydraulic Swing Motor Device Assembly
Manufacturer Model Number: Eaton 104-6485-005 (H Series / 2000 Series Architecture)
Kubota OEM Part Number: RG008-61280 (RG00861280)
Machine Compatibility: Kubota KX36-2 Mini Excavator
Condition: Brand New Original / OEM Specification Equivalent
2. Technical Specifications
Type: Geroler / Disc Valve Hydraulic Motor
System Output: Configured to match the exact displacement, flow thresholds, and pressure settings of the Kubota KX36-2 swing circuit.
Integrated Valve Network: Features built-in dual crossover cushion relief valves to absorb starting/stopping inertia and minimize structural fatigue.
Interface Mount: standard 4-bolt pilot flange with a heavy-duty output spline shaft engineered to mesh directly into the factory upper structure slew gearbox.
3. Critical Installation Requirements
Motor Case Priming (Mandatory)
Before starting the engine or activating the hydraulics, manually fill the swing motor housing with fresh, clean hydraulic oil through the highest available case drain port. Running the motor bone-dry—even for a few seconds—will score the internal wear plates and lead to immediate component failure.
Verify Case Drain Line Clearance
Thoroughly inspect the case drain line running back to the hydraulic reservoir. Ensure it is entirely free of kinks, sharp bends, or internal blockages. Backpressure in this circuit 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 spline 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 the new unit.
4. Frequently Asked Questions (FAQ)
Q: Is the Eaton 104-6485-005 a direct "drop-in" replacement for the KX36-2?
A: Yes. Eaton is the original supplier for many of Kubota's mini excavator swing drives. Part number RG008-61280 matches this Eaton designation exactly, aligning with factory bolt patterns, hose configurations, and pressure specs without any modification.
Q: My Kubota KX36-2 has a slight delay or drifts when I stop the cab rotation. Will this fix it?
A: Yes. Slow drift or sluggish deceleration response usually indicates that the integrated cushion relief valves inside the motor housing have scored seats or weakened springs. Replacing the complete device restores exact stopping performance.
Q: Does this swing motor come completely 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.