HEXA

ELECTRICAL 28 Note: The grooved ball bearing seal may be damaged if the cap is not pierced in the center with a suitable tool. 5. Fitted cover can only be removed by piercing and prising out. Note: The grooved ball bearing seal may be damaged if the cap is not pierced in the center with a suitable tool. 6. Insert suitable assembly tool (2) in splines of freewheel pulley (1). 7. Use the multi-point attachment (3) to stop the rotor shaft and unfasten the freewheel pulley with a box wrench. 8. Detach freewheel pulley. 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, M3…..No current should flow in this case i.e there should be ‘0’ appreciable change in the multi-meter reading. 2.1.2 Testing of Negative power diode: With red probe of the multi-meter on the lower hear sink into which the negative power diodes are pressed i.e. D- and black probe on the M1, M2, M3……. the multi-meter reading should be with in 0.300V and 0.900V. Interchanging the probe (black on D). No current should flow. Even if one diode found defective in the above tests, the rectifier assembly has to be replaced. NOTE: There are no excitation diodes in E8 155A alternator.