REPAIR COMBINING TRANSMISSION OIL COOLER OUTSIDE SURFACE
Wear gloves (E184.1) during the
remainder of this task; otherwise,
personal injury could result.
Acid etch the reworked area as follows:
Prepare a solution of 3 parts acetic acid
(E21) in 7 parts water. Wear gloves (E184.1)
Swab the area with solution for 2 minutes.
Use gauze sponges (E184).
Rinse the area with cold water.
Fluorescent inspect the reworked area to check
for cracks (TM 1-1500-335-23). There shall be no
cracks. If crack is suspected in aft transmission
oil cooler outside, refer to TM 1-1520-253-23.
Clean the reworked area with naphtha (E245)
and clean cloths (E120). Let the area air dry.
Swab on solution of alodine powder (E65) and
water. Use gauze sponges (E184). Swab for 2
to 5 minutes. Rinse the area with cold water
and let air dry.
Priming and painting shall be done
Apply one coat of epoxy primer (E292 or E293)
to the reworked area. Let air dry for 2 hours.
Finish the reworked area with two coats of black
lacquer (E462) or polyurethane (E285.1) as
determined by the following:
Apply methyl-ethyl-ketone (MEK) (E244) to
a small area of the existing topcoat near the
area to be refinished. Use brush (E86).
Wipe the area. If the topcoat wipes away, use
lacquer (E462). If the topcoat is unaffected,
use polyurethane (E285.1).
END OF TASK