مخفض آلية الدوران 19031-17900 لـ حفارة صغيرة Takeuchi TB016 TB017

1. Product Identification
Component: Hydraulic Swing Motor Device Assembly

Takeuchi OEM Part Numbers: 19031-17900, 19031-24700, 19039-07000 (1903117900, 1903124700, 1903907000)

Machine Compatibility:

Takeuchi TB016 Mini Excavator

Takeuchi TB017 Mini Excavator

Condition: Genuine Original New / Premium OEM Specification Equivalent

System Function: Drives the upper cabin superstructure rotation on Takeuchi 1.5-ton to 1.7-ton class mini excavators.

2. Technical Specifications
Type: Compact High-Torque Disc Valve / Geroler Hydraulic Motor (Eaton T-Series Platform)

Output Performance: Precision displacement, operating pressure, and flow rates matched to the Takeuchi TB016/TB017 dual auxiliary pump circuits.

Integrated Valve Network: Features factory-installed crossover shock relief and cushion check valves to absorb rotational kinetic energy during sudden joystick stops.

Interface Mount: Precision-machined flange configuration with an output spline shaft engineered for direct mesh engagement with the upper structure slew gear assembly.

3. Critical Installation Requirements
Motor Case Priming (Mandatory)
Before starting the excavator engine or cycling hydraulic controls, manually fill the swing motor casing with clean, fresh hydraulic fluid through its highest available case drain port. Operating any hydraulic motor dry—even for a few seconds—will score internal wear surfaces and cause immediate internal bypass.

Verify Case Drain Line Clearance
Thoroughly inspect the low-pressure case drain hose back to the hydraulic oil reservoir. Ensure there are no sharp bends, kinks, or internal wall collapses. Any flow restriction in this return circuit creates excessive housing backpressure, which will instantly blow out the motor's main shaft seal.

Gear Pinion & Slew Ring Lubrication
Thoroughly clean the mounting pocket on the chassis frame. Apply a heavy, uniform coating of premium lithium gear grease to the motor’s output spline shaft pinion and the matching teeth of the upper structure slew ring gear during installation.

Fluid & Circuit Decontamination
If replacing a unit that suffered internal mechanical failure, drain the hydraulic reservoir, flush the main control valve's swing spool circuit lines, and clean the oil cooler circuit. Abrasive metallic particles left in the system will rapidly score and destroy the new unit.

4. Frequently Asked Questions (FAQ)
Q: Are part numbers 19031-17900, 19031-24700, and 19039-07000 interchangeable?
A: Yes. These numbers represent standard Takeuchi engineering supersessions, factory revisions, and catalog updates across the TB016 and TB017 model production runs. They share identical physical frame sizes, mounting bolt dimensions, and hydraulic performance characteristics.

Q: My Takeuchi TB016 continues to swing past my intended stopping point when I release the joystick. Will replacing this unit fix the issue?
A: Yes. Over-swinging, drifting on slopes, or harsh judder during deceleration typically indicates that the integrated cushion relief valves or internal wear seals inside the swing motor housing have degraded. Installing a complete assembly restores exact holding and stopping control.

Q: Does this swing motor come pre-assembled and ready to install?
A: Yes. Units are delivered as complete assemblies, featuring pre-set crossover relief valves and internal dynamic groups tested for direct plug-and-play installation.

5. Shipping & Logistics
Packaging: Treated with rust-inhibiting anti-corrosion storage oil, sealed with heavy-duty plastic port plugs to prevent debris entry, and packaged securely 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 job site.