RING - BACK UP (AC0352-00440)

Backup Ring

This backup ring installs alongside an O-ring in a hydraulic fitting to prevent the O-ring from extruding into the clearance gap at high pressure. Hydraulic technicians install backup rings during system overhaul when pressure cycling has shown extrusion damage to the primary seal, or as preventive measure on circuits running above standard pressure ratings. Skipping the backup ring on high-pressure circuits leads to chronic O-ring failure. Sold as an aftermarket replacement, contact us to verify size and material before ordering, since backup rings of similar nominal size can vary in material durometer and split style, and substituting between styles changes extrusion resistance under operating pressure.

Aftermarket replacement part, cross-references original part number AC0352-00440.

Need help confirming fit? Call (562) 693-7748 with your serial number.

Part number variants: AC0352-00440, ac0352-00440, AC035200440, ac035200440

SCR Forklift Parts ships from Whittier, CA with next-day delivery available across the US when needed.