• Triplex plunger provides smoother liquid flow. • Hi-Pressure Seals or V-Packings on the CAT Pump 53 are completely lubricated and cooled by the liquid being pumped. • Lubricated Lo-Pressure Seals provide double protection against external leakage. • Oil bath crankcase assures optimum lubrication on this CAT Pump 53. • Close tolerance concentricity of the ceramic plunger maximizes seal life. • Optional Gearbox version for direct mounting to gas engine.