Download Upper Contact Voltage

Adjustments
Chrysler-Built
PATH: Engine Electrical > Charging System > Voltage
Regulator > Adjustments > Chrysler-Built > Lower Contact Voltage
Lower Contact Voltage
1. Remove the regulator cover.
2. Measure the lower contact point gap with a feeler gauge. The
lower contact gap should be 0.014 in. plus or minus 0.002 in. If
necessary, adjust the contact gap by bending the lower stationary
contact bracket while making sure that the contacts remain in
alignment.
Mechanical voltage regulator (cover removed)
3. If the voltage reading is now correct, refit the regulator cover. If
the lower contact gap is correct but the voltage reading is still
outside the 0.2–0.7 volt increase, continue this procedure to adjust
the lower contacts air gap.
Testing air gap on mechanical voltage regulator
4. Connect a small dry cell and test lamp in series with the IGN and
FLD terminals of the voltage regulator.
5. Insert a 0.048 in. wire gauge between the regulator armature and
the core of the voltage coil next to the stop pin on the armature.
6. Press down on the armature (not on the contact reed) until the
armature contacts the wire gauge. The upper contacts should just
open and the test lamp should be dim.
7. Insert a 0.052 in. wire gauge between the armature and the
voltage coil core, next to the stop pin on the armature.
8. Press down on the armature until it contacts the wire gauge. The
upper contacts should remain closed and the test lamp should
remain bright.
9. To obtain the correct difference of 0.2–0.7 volt increase of the
lower contact voltage over the upper contact voltage, adjust the
lower contacts air gap by loosening the stationary contact bracket
screw and moving the bracket up or down to obtain the proper air
gap setting as follows:
If the difference is above 0.7 volt, reduce the air gap to a minimum of 0.045 in.
with the contacts open and the test lamp dim. At 0.048 in., the contacts should
close and the test lamp should be bright.
If the difference is below 0.2 volt, increase the air gap to a maximum of 0.055
in. with the contacts closed and the test lamp bright. At 0.052 in., the contacts
should be open and the test lamp should be dim.
Be certain that the air gap is measured with the stationary contact bracket
attaching screw fully tightened.
1. When all adjustments are complete, refit the regulator cover.
PATH: Engine Electrical > Charging System > Voltage
Regulator > Adjustments > Chrysler-Built > Upper Contact Voltage
Upper Contact Voltage
Adjusting mechanical voltage regulator
1. Remove the regulator cover.
2. Use an insulated tool (see illustration) to adjust the upper contact
voltage as necessary by bending the regulator lower spring hanger
down to increase the voltage setting or up to decrease the voltage
setting.
3. Refit the regulator cover.