7–15 T-362
3. Using a utility knife, carefully section off the area around the leak (approximately 0.5 inches)
4. Using needle nose pliers, carefully remove the fins from the damaged area above and below the tube needing
repair. The fins to be removed should be approximately 1/2” of fin material from each side of the repair location.
5. Remove dirt from the surface around the leak point with a soft bristle brush and water. Then wash off any
residual oil with alcohol. Allow the surfaces to fully air dry.
6. Open up the leak point to at least 1 mm width by using the tip of a knife carefully. Remove all aluminum
fragments. Shape the cut to make it easy for epoxy resin to enter the microchannel.
7. Clean the area around the leak point with alcohol.
8. Connect the gauge manifold to the HI and LO service valves and evacuate the unit using a vacuum pump.
9. Remove the coil coating from the repair area by brushing the upper and lower portion of the tube with the
round tube brush.
10. Prepare the precut aluminum wrapper by folding it in half along the short (0.75”) length.
11. Using the emery cloth, remove any rough edges on the upper and lower portion of the tube and also scuff
the inside of the aluminum wrapper.
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