Concorde V6-2.7L VIN V (2001)
the vanes to follow the inside oval surface of the cam ring. As the vanes reach the restricted area of the cam ring, oil is forced out from between the
vanes. When excess oil flow is generated during high-speed operation, a regulated amount of oil returns to the pump intake side through a flow control
valve. The flow control valve reduces the power required to drive the pump and holds down temperature buildup.
When steering conditions exceed maximum pressure requirements, such as turning the wheels against the stops, the pressure built up in the steering
gear also exerts pressure on the spring end of the flow control valve. The end of the valve houses the pressure relief valve. High pressure lifts the relief
valve ball from its seat and allows oil to flow through a trigger orifice located in the outlet fitting. This reduces pressure on the spring end of the flow
control valve which then opens and allows the oil to return to the intake side of the pump. This action limits maximum pressure output of the pump to
a safe level.
Under normal power steering pump operating conditions, the pressure requirements of the pump are below maximum, causing the pressure relief valve
to remain closed.
In the event of a power steering pump drive belt failure, manual steering control of the vehicle can still to be maintained. However, under these
conditions, steering effort will significantly increase.
