TM 5-3820-233-35/1
for generators having an internally grounded
field circuit. Terminals of the regulator are
housed in special receptacles conforming to
Ordnance specifications. Connections to the
regulator are made by means of mating Ord-
nance-type receptacles on the vehicle wiring
harness.
b. Removal. Refer to Operator's Manual.
c. Reguluator Maintenance
(1) Test specifications for regulator
Model 111 8858 are as follows:
VOLTAGE REGULATOR
Air Gap (inches) _ _ _ _ _. 0 8 4
Satisfactory Operating
13.9-14.9*
Range (volts).
If outside range,
14.3*
adjust to (volts).
CURRENT
REGULATOR
Air Gap (inches) _ _ _ _ _ .115
Satisfactory Operating
38-42
Range (amp.).
If outside range,
.40*
adjust to (amp.).
CUTOUT RELAY
Air Gap (inches) _ _ _ _ _ . 0 4 8
.035
Point Openings
(inches).
Satisfactory Closing
11.8-13.4*
Range (volts).
12.8*
If outside range,
adjust to (volts).
RESISTOR VALUES
(OHMS)
Figure 9-1. Generator regulator with cover removed.
A _ _ _ _ _ _ _ _ _ _ _ _ _ _ 40
(2)
B _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 375
(2)
remembered that tungsten is extremely hard
C _ _ _ _ _ _ _ _ _ _ _ _ _ _ 100
(1)
and platinum is relatively soft. Platinum
D_ _ _ _ _ _ _ _ _ _ _ _ _ _ 100
(2)
points should be filed very lightly to avoid
E _ _ _ _ _ _ _ _ _ _ _ _ _ _ 20
(l)
excessive loss of metal. Never use sandpaper
*THESE VALUES APPLY ONLY WHEN
or emery cloth to clean contact points.
THE REGULATOR IS BEING TESTED AT
e. Regulator Checks and Adjustments (fig.
OPERATING TEMPERATURE, ON THE
VEHICLE, AND IN ACCORDANCE WITH
(1) Cutout Relay. Three checks and ad-
THE PROCEDURE DESCRIBED IN THE
justments are required on the cutout relay;
FOLLOWING SECTION.
air gap, point opening and closing voltage.
(2) Mechanical checks and adjustments
Air gap and point opening are checked with
(air gaps, point openings) must be made
the battery disconnected.
with the battery disconnected and the regu-
(a) Air Gap-Measure the air gap be-
lator preferably off the vehicle.
tween the armature and the core-not be-
d. Cleaning Contact Points. Clean contact
tween the brass pin in the armature and the
points with a fine-cut riffler file. The contact
core-with the contact points barely touching.
file should not be allowed to become greasy
If both sets of points do not close together,
and should not be used to file other metals.
it will be necessary to realine the lower con-
tact bracket slightly or to bend the spring
When cleaning the contact points it should be
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