#811529 Cat Pumps Unloader Repair Piston Assembly Cat 66DX, 67DX Pumps OEM
Kit 811529. OEM #811529 Unloader Repair Piston Assembly Kit. PTFE Piston Stem Backup Ring; part #129638. NBR 90D Piston Stem O-Ring; part #49104. Steel Piston Stem; part #49103. Steel Ball Valve Assembly; part #49383.