Champion ST073903AV Air Compressor Maintenance Kit

ST073903AV is an OEM replacement air filter element for Campbell Hausfeld two‑stage air compressors, designed to sit inside the unit’s air‑filter housing and trap dust and debris before it reaches the pump. It’s listed as the replacement element for models such as EX840300 and TF2001, with cross‑references for Campbell Hausfeld HS222201AJ and HS4000 units, making it suitable across multiple two‑stage pump assemblies. The element measures 2 5/16 inches in length and 4 3/8 inches in diameter, ensuring a precise fit within compatible Campbell Hausfeld housings. As an authentic ST073903AV replacement, it provides the filtration performance needed to maintain consistent airflow and protect internal pump components from contaminants. When installing, verify the seal seats evenly to prevent unfiltered air from bypassing the element and to preserve filtration efficiency. Regular replacement helps maintain filtration efficiency and airflow, preserving pump performance and reducing wear from particulates. This part is cataloged as ST073903AV and is commonly sourced from Campbell Hausfeld parts distributors and repair‑part retailers as the dedicated air filter element for the corresponding two‑stage pump assemblies.