PurposeUSED ON 737 TO MEASURE THE WIDTH OF THE FOLLOWING BEARINGS UNDER 5-10LBS AXIAL PRELOAD USING CUSTOMER FURNISHED DIAL INDICATOR OR DEPTH GAGE: BACB10BA35C AND BACB10BA40C USE SMALL PISTON ASSEMBLY (SIDE A). BACB10BA25C, BACB10BA30C, BACB10BB30C AND BACB10AAirplane737Usage CodeOVERHAUL 