860615509 cooling nozzle assembly for XCMG XMR603VT Light Roller

The 860615509 cooling nozzle assembly is factory calibrated according to the engine piston heat load, oil supply pressure and cylinder layout of XMR603VT roller. It adopts high-precision orifice design and one-way automatic opening and closing structure, with fixed injection angle and quantitative oil supply characteristics. The nozzle automatically opens for oil injection when the engine lubricating oil pressure reaches the standard value, achieving targeted cooling for piston heat concentration areas; it closes automatically during low pressure to avoid invalid oil circulation and pressure loss. The integral high-rigidity metal structure features strong pressure resistance, stable injection accuracy and excellent anti-blocking performance.

Road roller engines frequently work under high-load and high-temperature conditions with sustained heat accumulation inside the cylinder. Ordinary non-standard cooling nozzles have common defects such as inaccurate injection angle, unqualified oil supply flow, easy blockage and inflexible opening and closing. Long-term use easily causes insufficient piston cooling, local overheating, piston thermal deformation, cylinder scoring and accelerated wear of piston rings. In severe cases, it leads to engine power drop, oil burning and mechanical failure. The genuine 860615509 cooling nozzle assembly adopts precision orifice calibration and structural optimization design. It maintains accurate quantitative injection under fluctuating oil pressure, ensures uniform piston heat dissipation, effectively reduces cylinder internal thermal load, and improves engine high-temperature durability and operational stability.