TESTING POWER RECTIFIERS ANDTESTING AND ADJUSTINGCONTROLLED RECTIFIERSTo remove the heat sink assemblies, each of theelectrical connections must be opened. The assembly isfastened to the fan with two 5/ 16 in. tap-tite bolts.When these bolts are installed again, after removal, theymust be tightened to a torque of 144 to 216 pound-inch (16.3 to 28.1 Nm). When you install the rotatingrectifiers, put the terminal so that it is parallel to the longedge of the heat sink. This makes it easier when youare ready to connect the wires from the exciter armature(L4).The replacement of controlled rectifier (CR9) and fieldrectifier (CR10) can be easily done by removing therectifier module (A2) from the regulator chassis. Toremove the module, each of the connections to spadeterminals (6, 8, 10, 11 and 19) must be disconnected.The module can then be easily removed. The solderconnections on controlled rectifier (CR9) and fieldrectifier (CR10) can be safely opened with a solderinggun and needle-nose pliers. When you install either ofthese units use a resin-core solder of the typically60/40% (tin/lead) type. Use extra care to be sure thattoo much heat does not destroy the rectifiers.77
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