XCMG Fitting Coupling OEM 800172155 – Precision Fluid Connector for Articulated Dump Truck Hydraulic Systems
Fitting Coupling
Фитинг-муфта
Acoplamiento de conexión
The XCMG Fitting Coupling with OEM number 800172155 is a precision‑engineered hydraulic connector designed for the high‑pressure fluid systems of XCMG articulated dump trucks (ADTs). This genuine 800172155 fitting coupling ensures leak‑free connections between hoses, tubes, and hydraulic components, maintaining system pressure and preventing contamination ingress. Manufactured from high‑strength carbon steel with zinc‑nickel plating, the 800172155 coupling is rated for working pressures up to 42 MPa (6,090 psi), making it suitable for steering, braking, suspension, and implement hydraulic circuits. XCMG XDA30, XDA40, XDA45U, and TA30 ADTs rely on this fitting for reliable fluid conveyance in the most demanding mining environments.
The XCMG XDA45U articulated dump truck features a 41‑tonne payload and is powered by a Mercedes‑Benz OM460LA engine developing 360 kW (483 hp). Its hydraulic system operates at pressures exceeding 35 MPa, powering the articulation steering, hoist cylinders, and braking circuits. The 800172155 fitting coupling is used at critical junction points where hydraulic hoses connect to rigid tubes or valve blocks. The coupling’s design follows ISO 8434-1 (24° cone flareless fitting) standards, providing a metal‑to‑metal seal that eliminates elastomer degradation and withstands high impulse pressures.
The 800172155 fitting coupling is machined from cold‑drawn 35CrMo alloy steel, a high‑strength material that offers excellent fatigue resistance and dimensional stability. After turning, the coupling undergoes a multi‑stage surface treatment: zinc‑nickel plating (8‑12 µm thickness) followed by a trivalent chromate passivation, providing ≥720 hours of salt spray resistance per ASTM B117. This coating system ensures that the fitting remains corrosion‑free even in coastal mines or environments with high chloride levels. The coupling thread is precision‑rolled (not cut) to increase fatigue strength by 30% and to produce a smoother surface finish (Ra 0.4 μm) that reduces galling during assembly.
XCMG’s manufacturing process for the 800172155 fitting coupling includes 100% dimensional inspection using computerized vision systems, with critical dimensions held to IT6 tolerance. Each coupling is pressure‑tested to 1.5 times the maximum working pressure (63 MPa) for 30 seconds without leakage or permanent deformation. Random samples from each batch are subjected to impulse fatigue testing per ISO 6803, with 500,000 cycles at 40 MPa and 1 Hz; the coupling must show no leakage or cracking. This rigorous validation ensures that the 800172155 fitting can withstand the severe pressure spikes common in ADT hydraulic systems.
Field data from XCMG XDA40 ADT fleets operating in Australian iron ore mines demonstrates that the genuine 800172155 fitting coupling achieves an average service life exceeding 15,000 hours with no leakage or thread damage. Aftermarket couplings made from lower‑grade 45# steel with only simple zinc plating often fail prematurely due to corrosion, thread stripping, or stress corrosion cracking. The superior material and coating of the genuine XCMG coupling directly contribute to reduced fluid loss, lower maintenance costs, and increased machine availability.
Proper installation of the 800172155 fitting coupling is critical for achieving leak‑free performance. Before assembly, inspect the sealing cone and thread for any damage or debris. Apply a light coat of clean hydraulic oil to the thread and the 24° cone surface. Tighten the coupling nut to the specified torque using a calibrated torque wrench (typically 45‑50 N·m for a size with M18 thread). Avoid over‑torquing, which can deform the cone seal or strip the thread. After initial tightening, re‑torque after the first 10 hours of operation to account for thread seating and component relaxation.
For maintenance, inspect the 800172155 fitting coupling during every hydraulic oil change or at 2,000‑hour intervals. Look for signs of external weeping, which may indicate cone seal damage or insufficient torque. Check for thread corrosion or galling; if the coupling nut is difficult to loosen, apply penetrating oil and use a proper spanner. Replace the coupling if the cone surface shows grooves, scratches deeper than 0.1 mm, or if the threads are damaged. XCMG recommends replacing all hydraulic fittings after 12,000 hours or during a major system overhaul to ensure reliability.
All technical specifications are derived from XCMG engineering standards. Each genuine 800172155 fitting coupling is laser‑etched with the XCMG logo and part number for traceability. Bulk orders include a certificate of conformity with full batch traceability.
XCMG and the XCMG logo are registered trademarks of Xuzhou Construction Machinery Group Co., Ltd.
OEM part number 800172155 is an original manufacturer reference for a genuine XCMG fitting coupling. All specifications are derived from XCMG engineering standards and field validation data.
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