PAD AS 2144285 - Caterpillar

If there is a failure of the generator windings the generator can be rewound. A correct rewind job will return stator and rotor to like new condition. Four items are very important when rewinding any Caterpillar Generator. WIREThe correct AWG size and number wire must be used. This can be found in the rewind data. The type of wire must be that called for by NEMA standard MW1000 section MW24C. Use of wire other than that called for by this NEMA standard may cause a failure of the generator. VARNISHThe varnish must have a class F rating. A high strength 100 percent fill epoxy varnish is recommended. This is the best type material to use. BALANCERotors that have been rewound and varnished must be dynamically balanced. Balance the rotor to a displacement of no more than .0005 in. (0.013 mm) peak to peak. Vibration caused by a rotor that is not correctly balanced can damage the generator. RESISTANCEResistance measurements will be accurate only if made with instruments able to measure very low resistance. A Wheatstone or Kelvin bridge is recommended. Do not use an ohmmeter.Resistance values are correct only at the given temperature. If the temperature of the windings is different than that given, use the formula that follows to find the actual resistance: 5L3812 and 5L9980 Generators Rotor Winding Table 5L3811 and 5L6377 240-480V Generators * Rotor Winding Table 5L4067 Generator Rotor Winding Table 5L4069 and 5L9985 Generators Rotor Winding Table 5L4086 Generator Rotor Winding Table 5L4088 Generator Rotor Winding Table 5L4217 Generator Rotor Winding Table 5L4219 and 6L4087 Generators Rotor Winding Table 5L4236 Generator Rotor Winding Table 5L4290 Generator Rotor Winding Table 5L4292 and 6L3732 Generators Rotor Winding Table 5L6602 Generator Rotor Winding Table 5L6603 Generator Rotor Winding Table 5L6746 Generator Rotor Winding Table 5L7565 Generator Rotor Winding Table 5L7581 Generator Rotor Winding Table 6L5758 Generator Rotor Winding Table 5L3902 and 5L7861 Generators Rotor Winding Table 5L3963, 5L7580, 6L2067 and 5L6776 Generators Rotor Winding Table 5L4043, 6L2068 and 6L2893 Generators Rotor Winding Table 5L5913 and 6L1636 Generators Rotor Winding Table 5L6966 and 6L5135 Generators Rotor Winding Table 5L7968 Generator Rotor Winding Table 5L8347 Generator Rotor Winding Table 5L8698 Generator Rotor Winding Table 5L3813 Generator Rotor Winding Table 5L3903 Generator Rotor Winding Table 5L3964 and 6L9579 Generators Rotor Winding Table 5L4044 and 6L9556 Generators Rotor Winding Table 5L3811 and 5L6377 120/208V Generators Rotor Winding Table 5L4068 and 5L9057 Generators Rotor Winding Table 5L4087 and 5L8189 Generators Rotor Winding Table 5L4218, 6L1768 and 6L5134 Generators Rotor Winding Table 5L4235 and 6L4827 Generators Rotor Winding Table 5L4291 Generator Rotor Winding Table 5L3901 and 6L4517 Generators Rotor Winding Table 5L5912 and 6L2212 Generators Rotor Winding Table