PUMP GP-GEROTOR 2080704 - Caterpillar

TYPE="LEVEL" DEPTH="1" @@@-->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.Wire
The 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.Varnish
The varnish must have a class F rating. A high strengh 100 percent fill epoxy varnish is recommended. This is the best type material to use.Balance
Rotors that have been rewound and varnished must be dynamically balanced. Balance the rotor to a displacement of no more than 1/2 mil peak to peak. Vibration caused by a rotor that is not correctly balanced can damage the generator.Resistance
Resistance 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. 7L10, 7L69, 8L50 and 8L78 Generators 7L11, 7L43*, 7L70, 7L84, 8L19, 8L51, 8L69 and 8L87 Generators 7L13 Generators 7L14 Generator 7L16 Generator 7L17, 7L44* and 7L72 Generators 7L19, 7L61*, 7L79, 8L22, 8L53, 8L70 and 8L88 Generators 7L21, 7L60, 7L81, 7L99, 8L23, 8L55 and 8L64 Generators 7L23, 7L64 and 7L83 Generators 7L25, 7L39, 7L67*, 7L68, 7L85, 7L87, 8L24, 8L59, 8L71 and 8L76 Generators 7L40, 7L77, 8L20, 8L28, 8L57 and 8L66 Generators 7L54, 8L41 and 8L80