TM 5-6115-271-14
TO 35C2-3-386-1
TM 05926A-14
NAVFAC P-8-613-14
MAINTENANCE OF THE CONTROL BOX ASSEMBLY
8-1. General
(1) For Model MEP-026A Regulator, Voltage
(universal) IAW FO-3, use potentiometer (750 ohms,
All the controls and instruments necessary for the
25 watts) per MIL-R-22/3. For connection of red,
operation of the generator are contained in the control
black, and white jumper, see instructions on front and
box. These controls and instruments include the
side plate. Remove and discard wires that connect to
voltage regulator, frequency converter, output selector
terminals 25, A, B, and C.
switch, current transformer and terminal board, fixed
(2) Capacitor C4 is only used on Model
resistor board, and the necessary wiring harness.
MEP-026A old regulator, Change 9, FO-3.1.
NOTE
a. General. This paragraph provides instructions
Some components referenced in this section
covering test and repair procedures for Voltage
are not located in all generator sets in the
Regulator NSN 6115-00-764-7621; P/N
precise location indicated on the illustra-
13219E0883(97403).
tions. If any difficulty is encountered in
locating individual components, refer to the
wiring diagrams (FO-1, FO-2, FO-3).
the voltage regulators as follows:
8-2. Wiring, Wiring Harness and Terminal Board
(1) Tag and disconnect all electrical leads.
a. General. Inspect the wiring for defective insula-
(2) Remove four (4) screws and lockwashers.
tion. Wrap slight insulation deterioration with electrical
(3) Remove the voltage regulator.
tape. Refer to figures FO-1, FO-2, and FO-3 when
c. Test Equipment and Material Required:
replacing or repairing wiring. Make soldering
connections where applicable. Tag each wire and
equivalent.
corresponding terminal at time of removal to insure
(2) Resistor, Fixed: 30 OHMS 10%, 120 Watt
correct reassembly of wire to proper terminal.
rating.
NOTE
(3) Rheostat, Variable: 750 OHMS 10%,2 Watt
All removal, testing, or installation of con-
rating (Rheostat supplied with serviceable voltage
regulators).
trol box components require the removal of
the control box cover (para 4-15).
rating.
(Model MEP-016A/C).
(Located in back of manual.)
(7) Variable Voltage Source: 0-150 Volts AC, 60
(Model MEP-021A/C).
Hz., 0-5 Ampere, single phase.
(Located in back of manual.)
(8) Compound, thermojoint, 13217E3704 (97403).
d. Test Procedures.
(Model MEP-026A/C).
(Located in back of manual.)
WARNING
Extreme care should be taken while conduct-
wire from point of origin to point of termination.
ing tests involving use of the 150 Volt, 60 Hz
c. Removal and Installation. Refer to Figure 8-lC to
Source, for safety of personnel, and
remove or install the wiring, wiring harness, and ter-
damage to equipment being used.
minal board.
d. Installation Instructions.
