4-16. TOP FRONT PANEL (cont)
(3) To replace insulation:
(a) Remove as much old insulation material as possible by pulling or scraping it away from the metal surface
Dry cleaning solvent (Federal Specification P-D-680) used to clean parts is potentially dangerous to
personnel and property. Do not use near open flame or excessive heat. Flash point of solvent is 100 F
to 138 F (38 C to 59 C).
(c) Coat the mating surfaces of the metal and insulation with adhesive (item 1 Appendix E). Let both
surfaces air dry until the adhesive is tacky but will not stick to fingers.
(d) Starting with an end, carefully attach the insulation to the metal. Press into firm contact all over.
(1) Position top front panel (5) and aline mounting holes with frame fasteners.
(2) Install 14 tapping screws (6) in top front panel (5).
(3) Install two stacking bolts (4), screws (1), lockwashers (2), and washers (3).