TM11-6125-256-34
(2) DC contact brushes 100 percent in the direction of
(1) Position the voltage and frequency regulator
armature rotation, and 75 percent in brush thickness.
assembly in the control box assembly and secure with the
four screws, flat washers, and lock washers.
(2) Install the two screws, flat washers, and lock
washers securing the center of the circuit board
Regulator Assembly, Type 4B48-6-A.
(fig. 3-5)
(3) Connect the leads at the regulator connection
a Removal
board and at the mounting screw for capacitor C9
(ground screw)
(4) Attach variable resistor R14 to control box
(1) Remove the control box cover
assembly with the internal tooth lock washer and hex nut
Loosely install jam nut. Do not tighten jam nut until
voltage adjustment has been performed (paragraph 3-5)
(2) Remove jam nut, hex nut, and internal tooth
Tie lead wires from variable resistor R14 to wiring
lock washer and remove variable resistor R14 from
harness
control box assembly front panel Cut ties from harness
to free leads
(5) Install the control box cover
(3) Disconnect the leads at the regulator connection
(4B48-6-A)
board and at the mounting screw for capacitor C9
Use the operational test procedure given in paragraph
(ground screw)
3-5 to test the output frequency
(4) Remove two screws, flat washer, and lock
Tests and Procedures (4B48-6-A)
washers, which secure the center portion of the circuit
Equipment which meets the performance standards in
board to the control box assembly
tables 3-3 and 3-4 may be considered acceptable for
service Perform each step of the tables in sequence For
each step, perform all the actions in the control setting
(5) Remove the remaining four screws, flat washers,
columns and then perform the specific procedure and
and lock washers and remove the voltage and frequency
verify it against its performance standard If any
regulator assembly from the control box assembly
abnormal actions or reading occur, refer to the
troubleshooting procedures listed in table 3-2
b Installation
