Comparison of vickers V‐104C and 20VQ5 vane pump wear rates for various water‐glycol hydraulic fluids

Abstract

AbstractWork is currently under way within the ASTM D.02 N.07 ‘Hydraulic Fluid Testing’ Committee to evaluate the potential of replacing the Vickers V‐104C vane pump with a newer, more current model 20VQ5 vane pump for use in an updated ASTM D 2882 standard and other national standards. All the round robin work conducted within the Committee thus far has involved the use of non‐aqueous hydraulic oils. Although there are some significant inter‐laboratory reproducibility problems, it appears that the overall ranking of these hydraulic oils by most laboratories appears to be consistent. To further evaluate the potential utility of replacing the Vickers V‐104C pump with the 20VQ5 pump, a series of different water‐glycol hydraulic fluid formulations with significantly different wear rates were evaluated using a ‘modified’ ASTM D 2882 testing procedure. The results showed that expected catastrophic pump failures, which occurred with the V‐104C pump, not only did not occur with the 20VQ5 pump, but the relative orders of wear rates for some of the fluids were also different.