Field Winding - Test
Rotor Field Winding Continuity - Test
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Illustration 1 | g03222017 |
Rotor field winding continuity test (1) Rotor (2) Slip ring |
- Put the multimeter on the 200 ohm resistance (Ohms) scale. Touch the meter leads to each slip ring (2) on rotor (1) as shown in Illustration 1.
- The resistance values should be as follows. See specifications for the K1, 24 V alternators.
3E-7295 Charging Alternator Gp, and 9X-0341 Charging Alternator Gp ... 2.47 to 2.75 ohms
8C-5535 Charging Alternator Gp, and 7T-2876 Charging Alternator Gp ... 3.4 to 3.7 ohms
9W-3043 Charging Alternator Gp ... 9.0 to 9.9 ohms
2Y-4212 Charging Alternator Gp ... 18 to 22 ohms
2Y-8310 Charging Alternator Gp ... 14.4 to 17.6 ohms
- If the resistance is not correct, the rotor is open or shorted and must be replaced.
Rotor Field Winding Ground - Test
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Illustration 2 | g03222043 |
Rotor field winding continuity test (1) Rotor (2) Slip ring |
- Put the multimeter on the 20M resistance (Ohms) scale. Touch the meter leads between each slip ring (2) and the rotor shaft.
- Both readings should be 100000 ohms or greater (meter reading 0.10 or greater).
- If the meter reading is low, the rotor is grounded and must be replaced.
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