TM 5-3820-233-35/1
fingers on the armature until points do meet
simultaneously. Adjust air gap by loosening
the two screws attaching the lower contact
bracket, and raise or lower the contact bracket
as required. Be sure the points are properly
lined up and tighten the screws well after ad-
justment.
the
Opening-Measure
(b) Point
point opening and adjust by bending the
upper armature stop.
(c) Closing Voltage-To check the
closing voltage on the cutout relay, insert
Special Testing Harness No. 1 (fig 94) in
between T-l (armature) and the ground
screw at the end of the regulator (fig. 9-5).
Gradually increase generator speed and note
the voltage at which the relay contact points
close. Adjust the closing voltage, if neces-
sary, by turning the adjusting screw at the
base of the cutout relay frame. Increasing the
spiral spring tension increases the relay
Figure 9-3. Cutout relay adjustments.
closing voltage-decreasing the spiral spring
tension lowers the closing voltage.
(2) Voltage Regulator. Two checks and
adjustments are required on the voltage regu-
lator: air gap and voltage setting. Attention
is called to fact that the AIR GAP and not
the POINT OPENING is checked and ad-
justed.
(c) Air Gap-The air gap should be
measured between the armature and the part
of the core (not the residual pin in the core)
next to the residual pin, with the points just
touching. The proper way to measure this air
gap is to push the armature down until the
points open, release until the points barely
close, then measure the air gap. Do not
measure the gap with the flat spring that sup-
ports the contact screw raised up off the fiber
mounting plate. To adjust, loosen the locknut
and turn the contact screw. The most con-
Figure 9-2. Voltage and current regulator adjustments.
3-8
