Kohler KD 500 Werkplaatshandboek - Pagina 30

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Electrical equipment

- 30 -

Checking the alternator

With the engine at a standstill, disconnect the alternator wires

from the regulator and check:

1. using an ohmmeter, that the windings (fig. 45, null resistance)

and the insulation between wires and ground (fig. 46, infinite

resistance) are unbroken. Replace the stator if interruptions

are discovered;

2. with a voltmeter, the voltage between the two yellow wires

(fig. 47). Accelerate the engine to 3000 rpm. The voltage

must be 33V.

If the values are more than 10V less than this, it means that

the rotor is demagnetized and that the alternator must be

replaced.

Warning:

1. the alternator does not deliver current when the yellow

cables are isolated

2. the alternator burns out if the yellow wires are

grounded

3. the regulator may be damaged if the ground

connection or electrical connections are made in a

slapdash way.

4. the alternator and regulator will immediately burn out if

the battery connections are inverted.

Make sure that the teeth of the crown wheel are not worn or

damaged. Heat the starting ring gear to a temperature of 200-

250 °C before fitting it on to the flywheel .

Workshop Manual KD500 _ cod. ED0053029390 - 1° ed_rev. 00