PILOT 2V6420 - Caterpillar

Balance
Rewound rotors must be balanced dynamically. When you balance the rotor, the rotor's peak to peak displacement should be no greater than 0.0127 mm (0.0005 inch).
If the rotor is not balanced properly, vibrations will result. These vibrations can damage the generator.
Resistance
For the resistance checks, use a milliohmmeter such as a Wheatstone bridge or a Kelvin bridge. Most digital multimeters and analog multimeters are not accurate enough to measure the coil resistance.The resistance values are correct only at the given temperature. If the winding temperatures are different from the temperatures in the table, use the following formula in order to find the actual resistance.R2 = R1×(234.5 + T2) / (234.5 + T1);R1 - The resistance that is listed in the tableR2 - The resistance that is actually measuredT1 - The temperature that is listed in the tableT2 - The temperature that is actually measuredTesting
High potential tests must be performed according to the following standards:
NEMA"MG 1-1998 32.21"
IEC"60034-6"