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Page 2: ... using tension gauge or 1 4 deflection with 4 lbs of finger pressure 3 If belt tension is changed make sure the pulley alignment is checked Follow instructions in the Belt Replacement Alignment and Tensioning service procedure which is on the web at www dentalez com downloads service procedures or call RAMVAC Technical Support at 866 DTE INFO 4 Return the vacuum pump to service Check Oil Drip Rate...