TM 5-4520-253-13
R E P A I R P C B O A R D A S S E M B L Y W I R I N G T E R M I N A LS
TOOLS: Tool kit, service, refrigeration unit
NSN 5180-00-596-1474
EQUIPMENT CONDITION:
Condition Description
3-107
Safety thermostats and flame switch and
bracket assembly removed.
GENERAL SAFETY INSTRUCTIONS:
Power off.
Heater cool.
REPAIR:
Death or serious injury could occur if precautions are not
taken when maintaining this equipment. Position HEATER-
OFF-FAN switch to OFF, remove power cable plug from
POWER RECEPTACLE, and ground capacitors Cl and C2
prior to gaining access to heater compartments. Terminals
of capacitors are accessible at end cover of combustion
blower. Always have another person standing by who is
trained in electric shock first aid.
Allow sufficient time for heater to cool to room tempera-
ture before gaining access to heater compartments.
1. Check ring tongue terminals (1) for security, damage, and burning. Replace loose or damaged
terminal. If damaged terminal is still firmly crimped to wire, cut wire close to terminal. Strip
3/8 inch (9.53 mm) of insulation and crimp on new terminal,
2. Check quick disconnect terminals (2) for security, damage, and burning. Be sure terminal makes
firm contact with mating terminal.
Replace loose, damaged, or poorly fitting terminals. If
damaged terminal is still firmly crimped to wire, cut wire close to terminal. Strip 3/8 inch
(9.53 mm) of insulation and crimp on new terminal.
3. Check soldered wire ends (3) for weak or broken connections. Resolder where needed. Be sure
1/4 inch (6.35 mm) of good wire is stripped before soldering.
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