Reciprocating fluid pump including at least one magnet on a spool of a shuttle valve

A reciprocating fluid pump comprising:

• a shuttle valve comprising:
• a valve body;
• a spool disposed within the valve body and configured to move between a first position and a second position within the valve body;
• and
• a positioning magnet assembly proximate a longitudinal end of the valve body, the positioning magnet assembly comprising a permanent magnet carried by the spool and at least one stationary magnetic device on the valve body, wherein the permanent magnet is configured to interact with the at least one stationary magnetic device to impart a magnetic force on the spool in a direction along a longitudinal axis of the valve body,
• wherein the permanent magnet is located and configured such that the spool is positioned away from a neutral position between the first position and the second position when the permanent magnet is aligned with the at least one stationary magnetic device at a position along the longitudinal axis of the spool and there is no magnetic force between the permanent magnet and the at least one stationary magnetic device, and
• wherein the permanent magnet is located and configured to impart a non-zero magnetic force on the spool when the spool is proximate the neutral position such that the spool is prevented from stopping at the neutral position.