Cazuela de Vaca (Beef and Pumpkin Stew) This hearty Chilean stew of beef, corn, and pumpkin is a one dish meal. The main ingredients are stewed in serving-sized pieces, so that each person receives a large piece surrounded by a broth with the other vegetables.
Quick Answer. A rotary vane vacuum pump works by using centrifugal force to turn blades against the circular surface of a cylinder whereby pockets of air are pushed from an inlet port to an outlet port as air pressure increases.
A loose drive belt on the pump can be at fault, or the pump itself may be failing. Power steering pumps are vane type pumps, which are highly reliable, but the shaft bearings can wear out, especially if the belt is too tight, or a vane can stick, and fluid contamination can cause failure.