Reservoir assembly with breather vent

A vehicle hydraulic oil reservoir assembly includes a main reservoir (12) and an auxiliary reservoir (16). The main reservoir (12) has a lower portion and an upper portion. The auxiliary reservoir (16) has a lower portion and an upper portion. The auxiliary reservoir (16) has a port formed in the upper portion thereof. The lower portion of the auxiliary reservoir (16) is communicated with the lower portion of the main reservoir. A breather vent (50) is in communication with atmosphere.