What is the primary function of the trunnion pump in the system?

The primary function of the trunnion pump is to pressurize the scavenge system. In the M777A2 Howitzer, the trunnion pump plays a crucial role in the hydraulic system, ensuring that the hydraulic fluid is kept at the necessary pressure for optimal performance of various mechanisms, including recoil and elevation. This pressurization is essential for the effective functioning of hydraulic actuators and components, allowing for the smooth operation of the howitzer during firing and subsequent maneuvers.

Maintaining proper pressure in the scavenge system is vital for preventing cavitation and ensuring that the hydraulic fluid can efficiently return to the reservoir, thereby sustaining the overall hydraulic operations of the howitzer. Without the proper pressurization provided by the trunnion pump, the hydraulic system would not function effectively, impacting the howitzer's performance.