The imported parts inside American equipment

The name on a loader or a harvester tells us who built the finished machine. Keeping it working can depend on factories several steps removed from that manufacturer. The import records give us one place to begin following those connections.

One part of the import picture

One concrete starting point is the Commerce Department's September 2026 publication on certain linear hydraulic cylinders and parts. Its Census-based table reports imports under six tariff reporting codes from five countries. Adding its 2025 figures gives $872,575,699, or about $872.6 million. [3]

The same selected basket totaled approximately $983.6 million in 2023 and $982.2 million in 2024. Commerce identifies the codes as 8412.21.0015, 8412.21.0030, 8412.21.0045, 8412.21.0060, 8412.21.0075 and 8412.90.9005. It omits a combined quantity because reporting units include both counts and kilograms. [3]

This is a defined slice of cross-border supply. It cannot support a claim about total U.S. hydraulic imports or the percentage of American equipment dependent on foreign parts. The lower dollar figure in 2025 also leaves several possible explanations open, including changes in prices, quantities and the mix of products. A dollar series alone cannot separate them.

From the import record to the machine

Hydraulics give us a useful way into the problem. The Justice Department's 2021 description of off-road equipment explains how pumps, valves, motors and cylinders work together, with separate systems possible for steering, propulsion and work functions. Manufacturers select those components for performance, price and the space available. [1]

That gives us several levels to examine. There is the finished machine. There are the components its manufacturer buys. Behind each component are the materials, parts and processes its supplier needs. Knowing the final assembly location answers only the first of those questions.

NIST's manufacturing guidance makes the same practical distinction. It calls for mapping suppliers' suppliers, their locations and transportation routes, because the lower tiers can reveal overseas exposure and bottlenecks that are invisible in a list of direct vendors. [2] For equipment, that means following a component far enough to understand whether the apparent choices actually depend on different sources.

The category has boundaries

The publication accompanied the opening of trade investigations. The initiation notice describes covered steel-barrel cylinders with specified minimum dimensions, certain barrels and piston rods, and circumstances involving other attached or accompanying parts. It says the written product description determines the investigation's coverage; tariff codes are supplied for customs convenience. [4]

That distinction matters when reading the number. A tariff category is a way to organize trade records. It is not a bill of materials for an excavator, a count of operating machines or a list of interchangeable parts. The table cannot show which machines received those imports, how long the components will last, or what replacement capacity is available.

There is also a substantial U.S. hydraulic industry. The National Fluid Power Association estimates 2024 U.S. hydraulic product shipments at $17.6 billion. It identifies construction machinery, agriculture, material handling, heavy trucks and automotive as the five largest hydraulic markets, together accounting for 57% of hydraulic product sales that year. [5] Those broader shipment figures and the narrower, different-year import basket measure different things. Dividing one by the other would not produce a meaningful dependency rate.

Follow the part through to the work

The risk becomes more specific at the machine. If the required part is unavailable, the useful questions are whether another supplier can meet the specification, whether that supplier has production capacity, and how long delivery and approval would take. A cheap part with no usable substitute can be more consequential than an expensive part stocked by several independent suppliers.

Country of origin belongs in that assessment alongside manufacturing location, transport, inventory and technical suitability. A nearby supplier may still depend on an overseas source. Two direct suppliers may share an upstream operation. NIST's guidance emphasizes tracing those lower tiers and identifying the sources of critical and hard-to-find parts. [2]

The national question comes back to the equipment that has to do the work: which supply paths could America replace, expand or restore quickly enough to keep it operating? Answering that requires getting closer to the machine: the actual component, the factory that makes it, the suppliers behind that factory, and the time required to put another acceptable part into service.