YLF-4-02-71&110120502-71 Oil Filter Base for Screw Air Compressor

A stable oil filter mounting base ensures uninterrupted lubrication and contaminant control. The YLF-4-02-71 (referenced by part number 110120502-71) is a cast metal oil filter base (filter head/adapter) for screw air compressors. Featuring multiple threaded ports, a robust housing, and an integrated central element/sight component, it provides secure mounting for the oil filter while managing oil flow and bypass routing within the lubrication system.

A cracked, corroded, or warped base leads to external oil leaks, loss of filtration pressure, bypass issues, and potential airend starvation. Seal failure or port wear often precedes system alerts. During replacement: shut down and relieve pressure, drain oil, remove old filter base, clean mating surfaces, install new YLF-4-02-71 with fresh gaskets/seals, torque evenly, refill lubricant, and inspect for seepage under operating temperature. Confirm thread size, port alignment, and filter compatibility before dispatch.

Also called oil filter head, filter mounting base, lube filter adapter, filter seat.