part 28338 Backup Ring, Piston Stem Cat Pumps code 28338 Details Cat Pumps number28338 DescriptionBackup Ring, Piston Stem Qty per pump1 Also comes in 76754 Kit, O-Ring (Includes: 414, 415, 424, 428, 429, 437) Fits these pumps Cat Pumps 4DX 1 4DX03ELR Cat Pumps 4SP 4 4SP21ELR4SP21ELU4SP29ELR4SP29ELU
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