R E P A I R P A I N T E D S U R F A C ES
TOOLS: Tool kit, service, refrigeration unit
MATERIALS/PARTS: Enamel, alkyd, camouflage (Item 3, Appendix E)
TT-P-636 Primer Coating, Alkyd, Wood and Ferrous Metal
Control box assembly removed.
Printed circuit (PC) board assembly removed.
Fuel lines and fittings removed.
Fuel filter removed.
Combustion blower removed.
Ventilating air motor removed.
Safety thermostats and thermocouple removed.
Burner head assembly removed.
Ignition transformer and cable removed.
Heat exchanger removed.
1. Provide the following conditions for painting:
a. Be sure all surfaces are free of soil, impurities or corrosion, such as grease, oil, solder flux, welding
flux, sand, rust scale, or other foreign matter.
b. Clean rusted areas to bare metal using sandpaper, wire brush, steel wool, or other abrasive
material, Wipe clean. Surface must be dry.
c. Provide dry, well-ventilated, dust free area.
d. Ambient temperature shall be not less than 50° F (10° C). Relative humidity shall not be over
e. Paint and surface shall be approximately same temperature.
f. All painting equipment shall be free of moisture just prior to painting.
g. All materials shall be thoroughly mixed, There shall be no separation of materials during painting
2. After surface preparation has been completed, apply primer coating in accordance with TT-P-636 as
promptly as possible, and in any case within 24 hours.
3. Allow primer coating to dry thoroughly before applying topcoat.
4. Apply topcoat in accordance with Ml L-E-52798 by spraying, dipping, or brushing.