TM 10-4610-241-24
TO 40W4-13-42
3-5.
THREADED INSERTS AND HELICOILS - continued.
(1)
Using portable electric drill, vernier caliper, and step drill (1), bore out damaged threads
(2)
to original depth.
WARNING
Compressed air can blow dust into the eyes. Wear goggles. Do not
exceed 30 psi (207 kPa) air pressure.
(2)
Clean newly bored hole, using compressed air.
(3)
Coat thread cutting tap (3) with lubricating oil.
(4)
Using tap wrench and tap (3), cut threads until tap bottoms.
WARNING
Compressed air can blow dust into the eyes. Wear goggles. Do not
exceed 30 psi (207 kPa) air pressure.
(5)
Using compressed air, blow out dirt and any loose metal chips in threads.
WARNING
Drycleaning solvent, P-D-680, C1 II, is highly toxic and can ignite
organic materials, nitrates, carbides, and chlorates. Wear eye, skin, and
respiratory protection. Use in a well-ventilated area.
(6)
Using wiping rag dampened with cleaning solvent, clean hole.
3-101