ELECTRICAL 20 1.6 Dismantling of DEF, Stator, and SRES: Mark the relative positions of the drive end flange (DEF), the stator and slip ring end shield (SRES) with respect to each other using a marker. Remove the four screws .This will facilitates dismantling of these three components. Pull off the fitting ring from the SRES. 1.7 Dismantling of DEF (Drive end flange assembly): Unscrew the four counter sunk screw, remove the cover plate. Examine the ball bearing for excessive play. If the play is noticeable press out the bearing using an Arbor press and a suitable mandrel. 2. TESTING INSTRUCTIONS: 2.1. TESTING OF RECTIFIER. 2.1.1 Testing of Positive power diode: Place the black probe of the multi-meter on the terminal B+ and red probe on the each of the points where the stator winding ends are soldered on the rectifier (Points M1, M2, M3, M4, M5, M6).Reading should be between 0.300V and 0.900V.Reverse polarity i.e red probe on B+ and black probe successively on M1, M No current should flow in this case i.e there should be ‘0’ change in the multi-meter reading.
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