TM 5-5420-228-24
GENERAL MAINTENANCE - Continued
Removal of Studs Broken Below Surface (Sheet 1 of 3)
TOOLS: Screw extractor set
Portable electric drill
Twist drill set
Hand oiler
Ball peen hammer
SUPPLIES: Penetrating oil (Item 11, Appendix D)
Goggles (Item 26, Appendix D)
Clean rags (Item 12, Appendix D)
1.
Using penetrating oil, lube thread area (A).
Choose right size guide (B) to fit hole (C).
2.
3.
Place guide (B) into hole (C).
WARNING
S a f e t y goggles m u s t b e w o r n
when using drill to prevent injury
to eyes.
4.
Using electric drill with pilot twist drill,
drill stud through center of guide (B).
Take guide (B) out of hole (C).
5.
6.
Using electric drill with twist drill slightly
smaller than extractor, drill into stud (D).
NOTE
Make sure all metal chips are
r e m o v e d from hole (C) before
using extractor.
Go on to Sheet 2
TA251284