An air filter assembly (also called air cleaner or air filter) is the first barrier in a construction machinery engine's intake system, responsible for filtering the air entering the combustion chamber to prevent dust, sand, willow catkins, mold spores, and other impurities from entering the cylinders along with the airflow, thus avoiding abrasive wear on the cylinders, pistons, and piston rings (commonly known as the "four-piece set") . The filter element is the most important component of the air filter—its quality mainly depends on the filter media: high-quality filter paper offers high filtration efficiency, low flow resistance, and long service life, whereas inferior filter paper has low filtration efficiency and high flow resistance, easily causing premature engine wear and reduced performance and lifespan . The air filter is essentially a consumable, with large quantities used every year, and is one of the most frequently replaced wear parts in routine construction-machinery maintenance .
Technical routes of Weichai's air-filter system (based on Weichai's official public materials, as background reference for this part, not specific to this item):
-
93 Sandstorm Filter technology: Learning from desert-filter structural design, Weichai developed the 93 sandstorm filter for non-road construction machinery—more compact than desert filters, with the same filtration principle, now a standard air filter on 50-class loaders and agricultural machinery; primary coarse-filtration efficiency reaches up to 93%, reducing four-piece-set early-wear rate by over 90% .
-
Dual-paper-element air filter: Weichai WP10 series is equipped with dual-paper-element air filters on agricultural-machinery and construction-machinery platforms, extending maintenance intervals with over 93% coarse-filtration effect, lowering user operating costs .
-
Tiered configuration principle: Single-stage air filters are suitable for low-dust environments (e.g., indoor generator sets); multi-stage air filters (such as the 93 sandstorm filter) are generally used in moderate-to-heavy dust environments (e.g., loaders, excavators, tractors) .
Background on Weichai WP10-series fitment on loaders: The Weichai WP10 series is a non-road Stage-III 6-cylinder diesel platform with bore×stroke 126×130 mm, displacement 9.726 L, power coverage 154–276 kW, fitted across construction machinery including loaders, cranes, milling machines, and motor graders —with broad fitment on 5-ton-class (50-series) models from multiple loader manufacturers such as XCMG, SDLG, Liugong, Lonking, and Shantui.
