CAT Pumps seal repair kit 31040 includes everything you need to rebuild the seals of select CAT Pump 35 Frame models including 3531, 3535, and 3537 pumps. Each kit has everything to repair all seals in your pump. All elements in the valve kit are OEM manufacture, made with the same original materials and to the same original specification.
Includes the following:
11345 - O-Ring, Plunger Retainer (Buna-N) (3)
44113 - Low-Pressure Seal w/SS Spring (Buna-N/316 S.S.) (3)