Lock Bolt Removal

TM 9-2320-303-24-2

CAB BODY REPAIR - CONTINUED

0289 00

RIVET REPLACEMENT - CONTINUED

Pry off rivet head with pin punch.

Tap out rivet shank with pin punch.

Lock Bolt Removal.

NOTE

If lock bolt head is inaccessible, locking collar must be removed. Remove collars by grinding or splitting

collars axially with sharp chisel.

Work from head side of lock bolt, if accessible. File small flat on head, if rounded.

Center punch head.

Using hardened drill slightly smaller than bolt head, drill through 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.

CAUTION

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.

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.

Make sure drill is correct size (Tables 1 and 2) and point is properly ground. Number 10 drill is used to install stan-

dard 3/16-in blind rivets.

Table 1. Drill Sizes for Solid Shank Rivets.

Drill

Rivet

Diameter

(in)

Drill Size

1/16

#51

0.0670

3/32

#41

0.0960

1/8

#30

0.1285

5/32

#21

0.1590

3/16

#10

0.1910

1/4

0.2570

5/16

0.3230

3/8

0.3860

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