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TROUBLESHOOTING AND REPAIR | ||
|
ROTOR VOLTAGE TEST (continued)
FIGURE F.1 – SLIP RINGS AND BRUSHES
Brushes |
| |
Slip Rings |
| |
| Lead 200A | |
Lead 219 | + | |
- | ||
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TEST PROCEDURE
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1.Using a 5/16” nut driver or socket, remove the 6 sheet metal screws from the case top.
2.Remove the rubber gasket (cover seal) from the lift bail.
3.Remove the fuel cap. The rubber gasket for the fill tube will come off with the case top.
4.Remove the case top, then reinstall the fuel cap.
5.With the 5/16” nut driver or socket, remove the 5 screws holding the right case side.
6.Remove the right case side by lifting up and
out.
7.Set the volt/ohmmeter to the DC volts position.
8.Connect the positive meter probe to the brush near- est the rotor lamination (lead 200A). See Figure F.1 for location.
9.Connect the negative meter probe to the other brush (lead 219).
10.Start the engine and run it at high idle. Set the out- put control to the MAXIMUM position (position 10).]
11.Check the voltage reading on the voltmeter. It should read between 32 and 45 VDC.
12.If the voltage reading is low or not present, the generator field is not functioning properly. Perform the Rotor Resistance Test.
13.If the voltage reading is normal, the field circuit is functioning properly. Install the right case side with the 5 sheet metal screws. Remove the fuel cap; install the case top and tighten the 6 sheet metal screws. Install the rubber gasket over the lift bail and reinstall the fuel cap.
