ENGINE AR- 3878483 - Caterpillar

Illustration 1 g01021519
The Cat VR6 presents an electrical shock/electrocution hazard. This hazard will cause serious injury or death.Service by trained personnel only.The terminals and heat sinks are live at hazardous voltages when power is applied and for up to 8 minutes after power is removed.
Connect a 10 K Ohm, 2 Watt potentiometer between terminals 6A and 7 on the voltage regulator.For an acceptable voltage control, the remote mounted potentiometer must be 10 K Ohm +5% with three turns or more and a dielectric strength of 1000 VAC minimum. The terminals of the remote mounted potentiometer are fragile. The wiring that is connected to a remote mounted potentiometer, should not have a diameter larger than 18 gauge. A wire with a larger diameter is not recommended. The wire should be 600 Volt class with 90 °C (194.0 °F) insulation.When the remote potentiometer is mounted a long distance (up to 15.24 m (50 ft)) from the generator set, a shielded cable may be necessary in order to isolate the signal from noise.