Component Testing and Adjustment 7-3TP-5648 8/93
3. The approximate ammeter reading should be
battery voltage divided by specified rotor
resistance. For rotor resistance, see
Specifications--Generator in Section 1.
Example:
12 Volts (Battery Voltage)
4.7 Ohms (Rotor Resistance)
=
2.6 Amps.
(Rotor Current)
4. Start engine and check that ammeter reading
remains stable. An increasing meter reading
indicates a shorted rotor. A decreasing meter
reading to zero or an unstablereading suggests a
running open (see Rotor heading later in this
section). If ammeter is stable proceed to Step 5.
5. Check for AC output across stator leads (see
Stator heading later in this section) and compare
to readings in Specifications--Generator of
Section 1. If readings vary considerably from
specifiedvalues,afaultystatorislikely(seeStator
heading later in this section).
6. If rotor and stator test good in prior steps, the
voltage regulator is probably defective. (Refer to
Voltage Regulator heading later in this section.)
NOTE
Stator Output Voltages found in
Specifications--Generator of Section 1 are based
on a battery voltage of 12 Volts. Should actual
battery voltage vary (11-14 Volts), resulting values
will also vary.
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