TM 9-4520-258-14
4-32.
TRANSFORMER ASSEMBLY.
This task consists of:
a. Removal
b. Repair
c. Installation
INITIAL SETUP:
Tools:
Material/Parts:
Tool Kit, General Mechanics (Item 1, App B)
Shielded gasket (Item 73, App F)
Tool Kit, Electrical Connector Repair (Item 2,
Shielded gasket (Item 74, App F)
App B)
Shielded gasket (Item 75, App F)
Heat Gun (Item 2, App B)
Gasket (Item 59, App F)
Lockwasher (Item 12, App H)
Equipment Condition:
Wire tags (Item 9, App E)
Unit disconnected from power source (para 2-8)
Heat shrink (Item 43, App H)
Top panel removed (para 4-19)
Duct cover removed (para 4-22)
General Safety Requirements:
Supply outlet screen removed (para 4-23)
WARNING
Contact with hot components can cause burns.
Allow unit to cool down before attempting
service/inspection/maintenance activity.
a.
Removal (Refer to Figure 4-57)
(1)
Tag and disconnect wire (1) TB1-8/F1-BLK and wire (2) Fl-WHT/TB1-3 from TB1 (3).
(2)
Remove two nuts (4), two lockwashers (5), two screws (6), ground wire (7) and two flat washers (8).
Discard lockwashers.
(3)
Lift transformer assembly (9) away from base plate (10), remove two heat shrink tubes (11) and disconnect
two high-tension leads (12). Discard heat shrink.
(4)
Remove eight nuts (13), eight lockwashers (14), eight flat washers (15), thermostat bracket (16) and cover
plate (17). Discard lockwashers.
(5)
Remove gasket (18) from cover plate (17). Discard gasket.
(6)
Disconnect the other end of two high-tension leads (12) and remove the leads through transformer base
plate (10). Remove grommet (19).
(7)
Remove transformer base plate (10).
(8)
Remove two shielded gaskets (20) and two shielded gaskets (21) as required.
b.
Repair is limited to the replacement of defective components.
4-148
