Northern Lights NL673K, Operator'S Manual

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ONL673 11/13
27
9. Parts: See Parts Book for complete list
a. Bearing
Part #22-68305
b. Brush assembly
Part #22-68304
10. Test Specifications: See Wiring Diagram(s)
a. Resistance of J-K
16.6 ohm at 20°C (68°F)
b. Resistance of A-B
0.25 ohm at 20°C (68°F)
c. Resistance of U1-V2
0.56 ohm at 20°C (68°F)
d. No load voltage setting
242V or 121V at 62 Hz with cold generator
AC Generator - TF-276D
7. Replacing Brushes
a. Shut down the generator. Remove four screws
and end cover of the generator.
b. Brush assembly is white plastic with two wires
leading to it. It is located at ten o’clock and is
held in position by two screws (
Figure 28
).
Remove the screws and unplug leads.
Figure 28: Brush Location.
c. Attach leads to new brush assembly and install it
with the plastic ears towards the front of the
generator.
NOTE: Be sure to connect wire J to terminal J,
and connect wire K to terminal K.
8. Generator Protection
To protect the generator and AVR from
unbalanced loads and over loads, two 20 amp
breakers are placed in the output circuit and one
3 amp breaker is placed in the AVR sensing
circuit (
Figure 29
).
Figure 29: Breaker Locations.