A fluid section for a reciprocating pump, a reciprocating pump and a method of loading a liner of a reciprocating pump

A fluid section for a reciprocating pump comprises a cylinder assembly including a housing having a central axis, a first end, a second end opposite the first end, and a throughbore extending axially between the first end and the second end. In addition, the cylinder assembly includes a liner disposed within the throughbore of the housing. Further, the cylinder assembly includes an end cap coupled to the second end of the housing. Still further, the cylinder assembly includes an annulus radially positioned between the liner and the housing, the annulus being in fluid communication with the throughbore of the liner. Moreover, the fluid section includes a piston slidingly disposed in the throughbore of the liner. The piston is adapted to compress a fluid disposed in a pumping chamber within the liner extending axially through the throughbore of the liner between the piston and the first end of the housing.