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TROUBLESHOOTING & REPAIR
AUXILIARY AND FIELD WINDING TEST (continued)
FIGURE F.4A – 14 PIN AMPHENOL PIN ASSIGNMENTS
| Y | C | B |
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D |
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| Z | ||
| L |
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E |
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| K |
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M |
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| A | ||
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| J | |
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| N |
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| W |
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FI
G
X H
To test the feeder winding:
1.Using the 5/16” and 1/8” nut drivers, remove the sheet metal screws from the right case side.
2.Carefully remove the right case side.
3.Set the voltmeter to the AC volts position.
4.Connect the voltmeter probes to leads #31 and #32 where they connect to the circuit breaker CB2 and the 14 pin amphenol. See the Wiring Diagram.
NOTE: It is possible to check this voltage reading at the amphenol by inserting the test probes at pin A (for lead #32) and pin J (for lead #31A). See Figure F.4A. However, if you use this method and get no voltage reading, it could mean there is a break or loose connec- tion in the leads between the circuit breaker and the amphenol. Check the reading again and with one probe at the circuit breaker con- nection for lead #31 and the other probe at amphenol pin A.
5.Start the engine and run it at high idle (3700 RPM).
6.Set the output control to the maximum position (position 10).
8.Check the AC voltage reading. It should be between 115 and 126 VAC.
RANGER
9.Connect the voltmeter probes to leads #31 and #42 where they connect to the circuit breaker CB2 and the 14 pin amphenol. See the Wiring Diagram.
NOTE: It is possible to check this voltage reading at the amphenol by inserting the test probes at pin K (for lead #42) and I (for lead #31B). See Figure 4A. However, if you use this method and get no voltage reading, it could mean there is a break or loose connection in the leads between the circuit breaker and the amphenol. Check the reading again with one probe at the circuit breaker connection for lead #31 and the other probe at amphenol pin K.
10.Set the output control to the maximum position. (position 10).
11.Check the AC voltage reading. It should be between 43 and 50 VAC.
If the voltage readings are within specifica- tions, then the windings are good and func- tioning correctly.
If any one or more of the readings are missing or not within specifications, then check for loose or broken wires between the test points and the stator windings. See the wiring dia- gram. Make sure that the windings are NOT grounded internally to the stator iron. If the leads are intact, then the stator may be faulty. Replace the stator.
12.Reinstall the right case side using the 5/16” and 3/8” nut drivers and sheet metal screws.
