TM 9-4120-402-14
6-3. CASING. - continued
b. Repair.
NOTE
Repairs are limited to rework of broken or cracked welds, straightening of bent or dented sheet
metal and replacement of handles, gaskets, insulation, and rivnuts and some small sheet metal
parts by drilling out rivets and installation of replacement parts.
Minor dents and bent edges can be straightened using common sheet metal repair procedures.
Should touch up or refinishing be necessary, see TM 43-0139.
(1) Disassemble unit as necessary and make repairs as indicated.
(2) Gasket and insulation replacement.
WARNING
Adhesive remover is flammable and the vapors can be explosive. Repeated or prolonged skin
contact or inhalation of vapors can be toxic. Use in a well ventilated area, wear gloves, and keep
away from sparks or flame.
NOTE
Use only gaskets, insulation, or name plates identified in TM 9-4120-402-24P.
(a) Soften and remove old adhesive and gasket residue using adhesive remover (appendix E, item
16) and a stiff brush.
(b)
See Appendix F to identify and fabricate gasket or insulation to be replaced using material
specified.
(c) Coat the mating surfaces of the metal and new gasket material with adhesive (appendix E, item 2).
Let both surfaces air dry until the adhesive is tacky but will not stick to fingers.
(d) Starting with an end, carefully attach the new gasket material to the metal. Press into firm contact
all over.
(3) Blind nut (rivnut) replacement.
(a) Drill out old blind nut using a drill bit slightly smaller than the body of the blind nut. Remove blind
nut.
(b) Install new blind nut.
(4) Nut plate replacement.
(a) Drill out rivets securing old nut plate using a drill bit slightly smaller than the rivet. Remove nut
plate.
(b) Position new nut plate in place and secure using new rivets.
6-3