AIR CONDITIONER EVAPORATOR COIL REPLACEMENT - CONTINUED
REMOVAL - CONTINUED
Remove thermostatic switch and sensor tube from evaporator coil (TM 9-2320-302-20).
Failure to wear protective gloves could result in serious skin cuts due to sharp edges on evaporator coil fins.
Wearing protective gloves, slide evaporator coil up and out of housing
Wearing protective gloves, slide evaporator coil into housing.
Insert thermostatic switch and sensor tube. Tip of sensor tube must be in direct contact with a fin and be inserted at least
4 inches (10 cm) into evaporator (TM 9-2320-302-20).
Remove plugs from refrigerant lines (6), evaporator coil inlet and outlet lines (7), and expansion valve (3).
Install new preformed packings and lubricate with refrigerant oil.
Apply loctite to male fitting threads and connect refrigerant lines (6) and evaporator coil inlet and outlet lines (7) to
expansion valve (3).
DO NOT connect refrigerant fittings using only one wrench. Hold one fitting in place using a wrench and
turn other fitting with a second wrench.
Using wrenches, tighten evaporator coil lines (7) to 216 lb-in (25 Nm).
Tighten refrigerant lines (6): large hose to compressor to 24 lb-ft (33 Nm); tighten small hose from receiver-drier to 144
lb-in (16 Nm).
Any time air conditioning system refrigerant is evacuated, replace receiver-drier.
Replace receiver-drier (WP 0118 00).
Evacuate and charge system with refrigerant (WP 0112 00).
Add refrigerant oil to compressor to replace that which was lost during system discharge (WP 0116 00).