Section IV. DIRECT SUPPORT TESTING PROCEDURES

TM 11-5825-271-34

b. Replacement. Proceed as follows.

3-16. Removal and Replacement of Motor Tuning

(1) Refer to figure 3-5 (2). Position motor tuning

Assembly

assembly (14) inside ATU cabinet and aline four

a. Removal. Proceed as follows.

mounting holes.

(1) Remove the core assembly as instructed in

(2) Insert four bolts (20) through the back of the

3-15a, above.

ATU cabinet. Install and tighten four nuts (15), lock-

(2) Refer to figure 3-5 (1). On the electronic

washers (16), and flat washers (17) to secure the motor

assembly (10), tag and remove two wires from terminals

tuning assembly (14) to the ATU cabinet.

3 and 4 of TB1 (9) (right side).

(3) Refer to figure 3-5 (1). Place electronic

(3) Support the electronic assembly (10) and

assembly (10) on the motor tuning assembly (14).

disengage four captive screws (11).

(4) Aline four captive screws (11) on the

CAUTION

electronic assembly (10) with the four clinch nuts on the

When performing the following procedure,

motor tuning assembly (14).

take care not to disconnect any wires

(5) Tighten four captive screws (11) to secure

connected to the electronic assembly.

the electronic assembly (10) to the motor tuning

assembly (14).

(4) Position the electronic assembly (10) such

(6) Reconnect the two tagged wires removed in

that the motor tuning assembly (14) is accessible.

3-16a(2), above, to terminals 3 and 4 of TB1 (9) on the

(5) Refer to figure 3-5 (2). From the rear of the

electronic assembly (10).

ATU cabinet remove four bolts (20), nuts (15), lock-

(7) Replace the core assembly as instructed in

washers (16), and flat washers (17) securing motor

3-15b, above.

tuning assembly (14). The assembly is now free to be

removed. Retain the attaching hardware for reassembly.

Section IV. DIRECT SUPPORT TESTING PROCEDURES

There are no special direct support testing procedures

repair, direct support personnel must test the entire unit

for the NDB transmitter, ATU, or the changeover unit.

in accordance with the testing procedures in TM 11-

However,

upon

completion

the

required

5825-271-12.

3-11