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TM5-4120-387-14
(4) Using screwdriver, remove two screws and washers each that attach
heater element support to coil while supporting the coil.
(5) Remove mist eliminator brackets.
(6) Using gloves to protect your hands and coil fins, carefully lift the
coil up and out of the unit.
b.
Repair
(1) Repairs are limited to replacement of rivets, plate nuts, and
straightening of mashed fins.
(2) Plate nuts may be removed by drilling out old rivets using a drill bit
slightly smaller than the diameter of the rivet.
(3) Install new plate nut(s) and rivets.
(4) If fins are mashed or dented so that air flow across coil would be
blocked, straighten them using a plastic fin comb.
c .
Installation
While handling coils, wear gloves to avoid cuts and reduce
fin damage on coil.
(1) Carefully slide evaporator coil down into unit.
(2) Aline and loosely install two screws and washers that attach heater
element support.
(3) Aline and loosely install remaining four screws and washers in right
and left hand coil/casing brackets and mist eliminator brackets.
(4) Using screwdriver, tighten all evaporator mounting hardware.
(5) While purging the system with nitrogen, braze the tube joints. (See
paras 5-7 and 5-8.)
(6) Replace the dehydrator. (See para 5-13.)
(7) Leak test all newly connected joints and those in the repair area. (See
para 5-9.)
(8) Install heater elements HR1 and HR6 (See para 4-57.)
(9) Install mist eliminator. (See para 4-26.)
(10) Install evaporator air discharge grille. (See para 4-18.)
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