Leak Test Seal
Before completing compressor assembly, install pressure test fittings on compressor. Install manifold gauge set and R-12 supply. Install shaft nut temporarily. With compressor in normal horizontal operating position, rotate compressor shaft several rotations by hand. Using a leak detector, leak test shaft seal. To remove pressure fittings, use spring lock coupling removal tool.
Tool Reference - No. 15 - Pressure Test Fittings, No. 16 - Spring Lock Coupling Removal Tool