Removal and Replacement of Transformer T2

TM 11-5825-271-34

panel.

relay bracket assembly (15) with the two holes in the

(5) Install and tighten two screws (1) and flat

control panel.

washers (2) to secure relay bracket assembly (15) to the

(5) Install and tighten two screws (1) and flat

control panel (17).

washers (2) to secure the relay bracket assembly (15) to

(6) Refer to figure 3-1. Swing the control panel

the control panel (17)

assembly (13) in and tighten two captive screws (12).

(6) Refer to figure 3-1. Swing the control panel

assembly (13) in and tighten two captive screws (12).

3-12. Removal and Replacement of Transformer T2

a. Removal. Proceed as follows.

3-13. Removal and Replacement of Control Panel

(1) Refer to figure 3-2. Remove two screws (1)

TEST Meter M1

and flat washers (2) securing the relay bracket assembly

a. Removal. Proceed as follows.

(15) to the control panel (17). Retain the attaching

(1) Refer to figure 3-1. Disengage two captive

hardware for reassembly.

screws (12) on the control panel assembly (13) and

(2) Refer to figure 3-1. Disengage two captive

swing control panel assembly out.

screws (12) on the control panel assembly (13) and

(2) Refer to figure 3-2. Remove two nuts (3),

swing the control panel assembly out.

lockwashers (4), and flat washers (5) securing the two

(3) Refer to figure 3-4. Tag and unsolder four

solder lugs (6) to the back of TEST meter M1 (16). Tag

wires leading from transformer T2 (2) at their destination.

and remove the two solder lugs and retain the attaching

(4) Remove two screws (13), nuts (4), lock-

hardware for reassembly.

washers (5), and flat washers (3) securing transformer

(3) Remove four nuts (9), lockwashers (8), and

T2 (2); remove transformer T2. Note location of three

flat washers (7) securing the TEST meter M1 (16) to the

solder lugs (14) secure by the attaching hardware.

control panel (17). Tag solder lug (19), and remove the

Retain the attaching hardware for reassembly.

TEST meter M1. Retain the attaching hardware for

b. Replacement. Proceed as follows.

reassembly.

(1) Refer to figure 3-4. Position transformer T2

b. Replacement. Proceed as follows.

(2) on the relay bracket (1), and aline the two mounting

(1) Refer to figure 3-2. Install TEST meter M1

holes. Ensure that all four wires from transformer T2 are

(16) on the control panel (17).

inserted through the hole in the relay bracket.

(2) Place solder lug (19) on stud and secure

(2) Install and tighten two screws (13), flat

TEST meter M1 (16) to the control panel (17) using four

washers (3), lockwashers (5), and nuts (4) to secure

nuts (9), lockwashers (8), and flat washers (7).

transformer T2 (2) to the relay bracket (1). Ensure that

(3) Place two solder lugs (6) on the terminals at

three solder lugs (14) are located as noted m 3-12a(4),

the back of TEST meter M1 (16). Fasten solder lugs

above.

using two nuts (3), lockwashers (4), and flat washers (5).

(3) Solder four tagged wires leading from

(4) Refer to figure 3-1. Swing the control panel

transformer T2 (2).

assembly (13) in and tighten two captive screws (12) to

(4) Refer to figure 3-2. With the control panel

secure.

(17) partially closed, aline the mounting holes in the

Section III. DIRECT SUPPORT MAINTENANCE OF ATU

WARNING

3-14. General

a. This section provides instructions for performing

Make sure that external ac circuit breaker

and battery supply are switched off and

the maintenance functions allocated to direct support

tagged with a warning not to be turned on

maintenance on the ATU.

b. Support illustrations are provided to aid in the

while maintenance is being performed.

performance of procedures.

The numbers in

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

3-15. Removal and Replacement of Core Assembly

correspond to the item callout on the illustration.

a. Removal. Proceed as follows.

c. All wires removed/unsoldered during the

(1) Refer to figure 3-5 (2).

Using a slot

disassembly procedure should be tagged for

screwdriver, unlock the ATU front cover (12) by turning

identification.

latch screw (13).

3-7