TM 9-2320-363-34-2
CAB BODY REPAIR (CONT)
Lock Bolt Removal
1.
2.
3.
4.
5.
NOTE
If lock bolt head is inaccessible, locking collar must be
by grinding or splitting collars axially with sharp chisel.
WORK FROM HEAD SIDE OF LOCK BOLT, IF ACCESSIBLE,
ROUNDED.
CENTER PUNCH HEAD.
removed. Remove collars
FILE SMALL FLAT ON HEAD, IF
USING HARDENED DRILL SLIGHTLY SMALLER THAN LOCK BOLT, DRILL THRU HEAD. IN CASES
WHERE LOCK BOLTS ARE TOO HARD TO BE DRILLED WITH AVAILABLE DRILLS, GRIND HEAD
DOWN USING CUTOFF WHEEL OR CARBIDE BIT IN DIE GRINDER. WHEN USING GRINDER
METHOD, CUT HEAD DOWN UNTIL VERY THIN, BUT DO NOT GRIND COMPLETELY OFF OR
TOUCH BODY PART WITH GRINDING TOOL.
SUPPORT HEAD AND USE PIN PUNCH TO PRY OFF HEAD OR SHEAR OFF WITH SHARP
CHISEL.
C A U T I O N
Be careful not to distort lock bolt or lock bolt hole to prevent damage to
equipment.
DRIVE LOCK BOLT OUT OF HOLE WITH PIN PUNCH.
Rivet Hole Drilling
1.
CENTER PUNCH ALL NEW RIVET LOCATIONS. CENTER PUNCH MARK MUST BE LARGE
ENOUGH TO PREVENT DRILL FROM SLIPPING OUT OF POSITION AND MUST NOT DENT
SURFACE OF MATERIAL. TO PREVENT DENTING, PLACE BUCKING BAR BEHIND MATERIAL
DURING PUNCHING.
2.
MAKE SURE DRILL IS CORRECT SIZE (TABLES 1 AND 2) AND POINT IS PROPERLY GROUND.
NO. 10 DRILL IS USED TO lNSTALL STANDARD 3/16-lN. BLIND RIVETS.
22-16
