INSTALLATION - TM-5-4120-393-140257

TM 5-4120-393-14

5-21. Evaporator Coil (cont)

Remove tubing insulation and sensing bulb from suction line. See para 5-12.

While purging the system with nitrogen debraze the tube joints at the evaporator. See para 5-11.

Carefully lift the coil (6) up and out of the unit.

REPLACE

When replacing evaporator coil, mark on new coil location of rivet points for the heater top support by copying from the old

coil. Remove old heater top support from old coil and rivet in place on new coil.

WARNING

When handling coils, wear gloves to avoid cuts and to reduce fin damage on the

coil.

INSTALLATION

Carefully slide evaporator coil (5) down into unit and align holes.

Using screwdriver, secure evaporator coil (5) with twelve screws (1) and washers (2) to channel assemblies (3) and

(4).

CAUTION

To prepare a joint on a valve for debrazing/brazing, disassemble the valve to the

extent possible, then wrap all but the joint with a wet rag to act as a heat sink.

While purging the system with nitrogen braze the tube joints. See para 5-11.

Replace the dehydrator. See para 5-16.

Leak test all newly connected joints and those in the repair area. See para 5-12.

Install grommet (5) on outlet tube.

Reinstall and tape in place tubing insulation that was removed from the suction line tubing. If it was damaged, replace

with tubing insulation, item 17, Appendix E.

5-51