O-RingO-ring AC22131-42012, offered as an aftermarket replacement built to fit applications originally specified for this reference number for the documented reference number. O-rings seal the static and slow-moving interfaces inside distributors, fuel systems, and hydraulic circuits throughout the lift truck. Material compatibility and the correct cross-section are critical for a leak-free repair, which is why technicians prefer the documented replacement reference rather than improvising with bulk stock during forklift service. The wrong size or wrong compound shows up as a slow weep that recurs within a few duty cycles, forcing a teardown to redo the joint properly.Aftermarket replacement part, cross-references original part number AC22131-42012.Need help confirming fit? Call (562) 693-7748 with your serial number.Part number variants: AC22131-42012, ac22131-42012, AC2213142012, ac2213142012 ⚠ Warning: Some equipment has serial-number breaks that may not be reflected in the catalog. Contact us for clarification before ordering if uncertain.SCR Forklift Parts ships from Whittier, CA with next-day delivery available across the US when needed.