SCJ and 8SC Series Alternators Caterpillar

Illustration 1	g01066106
(6) Stator (7) Stator leads (8) Stator frame

Stator Winding Continuity Test

1. Connect the multimeter leads between each combination of two stator leads (7) : (A to B), (B to C) and (C to A). Make a note of each measurement.

2. The three measurements should be approximately 0.063 ohms.

3. Replace the stator (6) if any of the measurements are incorrect. If a measurement is too low, the stator (6) is shorted. If a measurement is too high, the stator (6) is open.

Stator Winding Ground Test

1. Set the multimeter to the 20 M ohm resistance scale. Measure the resistance between each stator lead (7) and the stator frame (8) : (A to 8), (B to 8) and (C to 8) .

2. Each measurement should be greater than 100 K Ohms (0.100 M Ohms).

3. If any of the three measurements are low, the stator (6) is shorted to the stator frame (8). Replace the stator if a short is measured.