TM 9-4120-388-14
4-31. FRESH AIR DAMPER - Continued.
c. Gasket replacement.
(1) Remove as much old gasket material as possible by pulling or scraping it away from the metal surface.
Acetone and methyl-ethyl ketone are flammable, and their vapors can be explo-
sive. 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.
(2) Soften and remove old adhesive and gasket residue, using acetone or methyl-ethyl ketone and a stiff
brush.
(3) Coat the mating surfaces of the metal and gasket with adhesive (item 2, Appendix E.) Let both surfaces
air dry until the adhesive is tacky but will not stick to fingers.
NOTE
An initial supply of adhesive is supplied as item 2, Section Il., Expendable Supplies and
Material List. (See Appendix E)
(4) Starting with an end, carefully attach the gasket to the metal. Press into firm contact all over.
d. Chain and pulley replacement.
(1) Use a drill bit slightly smaller than the rivet body to drill rivet, and remove chain from damper door.
(2) Remove screw and flat washer securing retaining bracket and pulley.
(3) Repair or replace parts as indicated.
5-72
