24-60-02 Adjustment procedure of voltage regulation E4A-91-100-000
The engines should be brought up to full operation coolant temperatures prior to adjustment.
With one engine at cruising speed, the voltage on the operating system is adjusted to 28 volts at a
typical electrical load by a replace of the set screw (see Fig. 24 – 4).The first engine is switched off
and the next engine is switched on. The second system has to be adjusted to the same voltage at the
same load and engine speed (only for twin-engine applications).
24-60-03 Adjustment of alternator balancing E4A-91-100-000
(only for twin-engine applications)
Both systems are switches on and the loads have to be compared for the operation point of the
voltage regulation adjustment.
If it is desired to pull the load division closer together, the regulator of the heavier loaded alternator
has to be adjusted lower respectively the regulator of the lower loaded alternator has to be adjusted
higher.
A test of the adjustment results shall be conducted by turning on the heaviest loads available and
varying of the engine speeds.
For not having significant brush wear difference on both alternators the alternator load current should
be as equal as possible. A difference of less than 25A is strongly recommended.
After completion of the regulator adjustment, the regulator set screws have to be fixed with torque
seal.
24-60-04 Replacing Alternator-Regulator E4A-91-100-000
If it is necessary to replace the alternator regulator type E4A-91-100-000 with the alternator regulator
type E4A-91-200-000, it has to be mentioned that in that case the wiring harness has to be replaced.
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