8477.90.65.00 - Hydraulic assemblies incorporating more than one of the following: manifold; valves; pump; oil cooler

This HTS category, 8477.90.65.00, specifically covers hydraulic assemblies that are designed as components for machinery used in the working of rubber or plastics. To qualify for this classification, an assembly must integrate at least two of the following distinct hydraulic components: a manifold (for distributing hydraulic fluid), valves (for controlling fluid flow and pressure), a pump (to generate hydraulic pressure), and an oil cooler (to regulate fluid temperature). These assemblies are essential parts of more complex machinery, ensuring the proper hydraulic function required for molding, extruding, or otherwise processing rubber and plastic materials.

This classification is distinguished from its sibling categories by its focus on integrated hydraulic sub-assemblies. For instance, while 8477.90.25 covers basic structural components like beds and rams, or cast/fabricated parts of injection systems, this category addresses the functional hydraulic systems that power or control such components. Similarly, it differs from "Other" parts under 8477.90.86 by requiring the presence of a combination of specific hydraulic elements rather than encompassing all remaining miscellaneous parts.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification under 8477.90.65.00 relies on the definitive presence of a multi-component hydraulic assembly as described. Practical classification will involve verifying the integration of at least two specified hydraulic parts (manifold, valves, pump, oil cooler) within a single functional unit intended for rubber or plastics machinery.