MIL-PRF-45307 Pump, Hydraulic, Axial Pistons: Manual, With Fire-Control SwitchThis specification covers a hydraulic pump assembly consisting of an axial piston pump, a control handle, and a fire-control switch. The nominal displacement of the pump is 0.80 cubic inch \(in.\) [13 cubic centimeters \(cm 3\)] per revolution \(see 6.1\).