B&C BQ51 double vane pump, interchangeable with the Vickers 4520VQ, with shaft-end section of 138.6 or 162.2 cc/rev and cover-end of 18 cc/rev.
B&C double vane pump from the BQ51 series, which fits in place of a Vickers 4520VQ. It combines a high-flow shaft-end section with a small cover-end section, which suits machines with a large main circuit and a low-flow auxiliary circuit.
Compare the numbers after 4520VQ on the old pump's plate (for example 50-05) and the shaft type.
Source: B&C BQ Series technical catalogue, CT BQ rev3E.
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