CAT Pump Model 45G1 Plunger Pump with Gearbox 4.5 GPM @ 3353 RPM, Pressure 100-3500 PSI


Model: 45G1

This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with a brass manifold, 304 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings.

This pump comes complete with a gearbox attached for direct mounting to a gas engine with a 1″ straight horizontal shaft.


• Industrial triplex design offers reliability and versatility.
• Compact direct-drive mount to motor using bell housing and flexible coupling (Electric – NEMA or IEC, Hydraulic – SAE).
• Gearbox model available with 1″ and 1 1⁄8″ hollow shaft to fit a wide variety of engines.
• Optional belt-drive for precision flow setting.
• Standard NBR seals with alternative options for temperature and chemical compatibility.


Technical Specifications
Max Flow 4.5 gpm / 17 lpm
Max Pressure 3500
Inlet Port Size 1/2″ NPT(F)
Discharge Port Size 3/8″ NPT(F)
RPM 3353
Drive Type(s) Direct, Gearbox
Material Brass


CAT Pump Model 45G1 Data Sheet

CAT Pump Model 45G1 Service Manual


Cat Pumps Limited Warranty