TM 5-5420-228-24
GENERAL MAINTENANCE - Continued
Removal of Studs Broken at Surface (Sheet 1 of 3)
TOOLS: Screw threading set
Portable electric drill
Twist drill set
Screw extractor set
Ball peen hammer
Prick punch
Hand oiler
SUPPLIES: Penetrating oil (Item 11, Appendix D)
Clean rags (Item 12, Appendix D)
Goggles (Item 26, Appendix D)
1. Using penetrating oil, lube thread area (A).
2. Using hammer, lightly tap stud (B).
NOTE
It is very important to drill out broken
stud on exact center line.
3.
Using punch and hammer, punch center of
broken stud (B).
WARNING
Safety goggles must be worn when using
drill to prevent injury to eyes.
4.
Using electric drill with pilot twist drill,
drill center of stud (B).
Using electric drill with twist drill slightly
5.
smaller than extractor, drill into stud (B).
TA251281
Go on to Sheet 2