Cub-cadet Yanmar 3TNV72 User Manual download pdf (Page 253)

ALTERNATOR

11-20 TNV IDI Service Manual

Testing of Dynamo

TESTING OF DYNAMO

Use a circuit tester or multimeter to perform the

following tests.

Testing Stator Coil Continuity

1. Disconnect the dynamo output wire connector.

2. Connect one meter lead to each of the stator

wire terminals and read the meter.

Results: The meter reading should indicate

continuity. If continuity is not indicated, the windings

are open and the stator must be replaced.

Testing Stator Coil Short-to-Ground

1. Disconnect the dynamo output wire connector.

2. Test continuity between each stator wire

terminal and engine ground.

Results: The meter reading should indicate infinity.

If the meter reading indicates continuity, the

windings are shorted to ground and the stator must

be replaced.

Testing Dynamo Regulated Output

1. Test and record the battery voltage with the

engine OFF.

2. Start the engine and operate it at normal

operating rpm.

3. Check the battery voltage with the engine

running.

Results: The meter reading with the engine

running must be higher than with the engine not

running.

• If results are not correct, test the stator for

continuity and shorts to the ground.

• Check the charging system wiring.

• If no problems are found in previous checks,

replace the IC regulator.

DYNAMO

Removal of Dynamo

1. Disconnect the output wire connector from the

dynamo.

2. Loosen the V-belt.

3. Remove the V-belt adjuster from the dynamo

bolt (Figure 11-23, (1)).

4. Remove the nut (Figure 11-23, (2)) from the

gear case stud. Remove the dynamo.

Figure 11-23

A CAUTION

PINCH HAZARD!

Carefully rotate the alternator toward the

cylinder block while loosening the

V-belt. Failure to comply may result in

minor or moderate injury.

0000014en

0002141

(1)

(2)

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