Section III. GENERAL SUPPORT MAINTENANCE OF ATU

TM 11-5825-271-34

Section III. GENERAL SUPPORT MAINTENANCE OF ATU

Insert the hitch pin clip through the hole at end of the

4-7. General

door support rod.

(3) Tag and disconnect all wires on the

a. This section provides instructions for performing

electronic assembly (8) leading from sources outside the

the maintenance functions allocated to general support

assembly.

maintenance on the ATU.

(4) Disengage the captive screws (3) securing

b. Support illustrations are provided to aid in the

the electronic assembly (8) to the motor tuning assembly

performance of procedures.

The numbers in

(2) and remove the assembly.

parentheses referenced in the text, e.g., (1), (2), etc.

b. Replacement Proceed as follows.

correspond to the item callout on the illustration.

(1) Place the electronic assembly (8) on the

c. All wires removed/unsoldered during the

motor tuning assembly (2).

disassembly

procedure should be tagged for

(2) Aline four captive screws (3) on the

identification.

electronic assembly (8) with four clinch nuts on the motor

tuning assembly (2).

WARNING

(3) Tighten four captive screws (3) to secure

electronic assembly (8) to motor tuning assembly (2).

Make sure that external ac circuit

(4) Reconnect all tagged wires to the

breaker and battery supply are switched

electronic assembly (8).

off and tagged with a warning not to be

(5) Remove the hitch pin clip from the door

turned on while maintenance is being

support rod (10) and disengage the door support rod

performed.

from the doorstop bracket (9). Insert the door support

rod m the retainer and lower the ATU front cover (1).

4-8. Removal and Replacement of ATU Electronic

(6) Using a slot screwdriver, lock the ATU

Assembly

front cover.

a. Proceed as follows.

(1) Refer to figure 4-2 Using a slot

screwdriver, unlock the ATU front cover (1)

(2) Raise the ATU front cover (1) and insert

the door support rod (10) into the doorstop bracket (9).

4-8