Cat Pumps 76977 OEM Seal kit 4SPX Pumps 4SPX32G1I
Cat Pumps 76977 OEM Seal kit 4SPX Pumps 4SPX32G1IPressure Seal Rebuild kit. 76977 NBR Kit, Seal (Inclds: 98,106,121,125)High Pressure SealsLow Pressure SealsSeal Case Manifold O-ringsPlunger Washer Seals Service Manual: https://www.catpumps.com/sites/default/files/2019-12/31378C%20MAN%204DNX%204DX%204SPX%2019159%20HiR.pdf