TM 5-4520-253-13
S e c t i o n V I . M A I N T E N A N C E P R O C E D U R E S
INDEX
Carburetor
Circuit Breaker
Combustion Blower
Control Box
Data Plates
Doors and Bottom Cover
Fuel Filter
Fuel Lines and Fittings
HEAT and FAULT Lights
Heater Case Assembly
Heater Case Covers
HEATER-OFF-FAN Switch
Igniter Assembly
Ignition Transformer and Cable
Labels
Power, Fuel Pump, and Room
Thermostat Plugs
Page
3-92
3-41
3-100
3-37
3-80
3-76
3-89
3-85
3-58
3-66
3-123
3-55
3-117
3-110
3-84
3-124
Power Receptacle and External Fuel
Pump Receptacle
Printed Circuit (PC) Board
Assembly
RESET Circuit Breaker
Room Thermostat Receptacle
Room Thermostat
Safety Thermostats and Flame
Switch and Bracket Assembly
Side Panels and Louver Linkage
Solenoid
Ventilating Air Motor
Wire Terminals
Wiring Harness, Control Box
Wiring Harness Plug
Wiring Harness Wires
Page
3-60
3-65
3-43
3-39
3-120
3-105
3-71
3-97
3-102
3-49
3-45
3-46
3-51
3 - 1 9 . G E N E R A L I N S T R U C T I O NS
Maintenance instructions in this section will list resources required, personnel required, and equipment
condition for the start of the procedure. Note the following:
• Resources required are not listed unless they apply to the procedure.
• Personnel required are listed only if the task requires more than one. If PERSONNEL is not
listed, it means one person can do the task.
• The normal standard equipment condition to start a maintenance task is heater shut down and at
room temperature. EQUIPMENT CONDITION is not listed unless some other condition is required
besides power “off and equipment cooled.
3-36
