b. Measure the air gap of the cutout relay between the
points and tighten the screws. Measure the contact
armiture and the core with the contact points barely
points and tighten the screws. Measure the contact point
touching. The air gap should be .037 inch. If the points
opening; it should be .037 inch. Adjust to obtain the
do not close, aline the lower contact bracket slightly or
correct contact point opening by bending the upper
bend the spring fingers on the armature until the points
armature stop. To check the closing voltage, insert a
meet and aline. Adjust the air gap by loosening two
wiring harness in the generator circuit as shown in figure
screws attaching the lower contact bracket. Raise or
lower the contact bracket as required. Aline the contact
circuit.
Figure 3-7. (1) Carrier engine generator regulator testing.
Figure 3-7. (2)-Continued.
The eccentric screw increases or decreases the tension
CAUTION
of the spiral spring. Increasing the spring tension
increases the relay closing voltage; decreasing the
The cutout relay, contact points must
spring tension decreases the closing voltage. When the
never be closed by hand with the
proper adjustment is secured, tighten the lockscrew.
battery connected to the voltage
CAUTION
regulator. This would cause high
current to flow through the units and
The generator must be cycled before
seriously damage them.
each check and adjustment. Cycle
the generator speed until the cutout
Gradually increase the speed of the generator until the
relay opens; then increase the speed
relay contacts close. Note the voltage; it should be
slowly until the proper speed for
between 25 and 27 volts. If the closing voltage is not
checking is reached.
within this rage, adjust by loosening the lock and
eccentric screw at the base of the cutout relay frame.
3-11
