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12
Electrical equipment
45
46
47
- 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.
Ring gear
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
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