TM 11-5820-890-30-4
2-53. REPLACEMENT OF THREADED SCREW INSERTS.
Threaded screw inserts are replaced as described in the following procedure. Table 2-3 lists the threaded screw
inserts included in the maintenance group for repair of this equipment. It also identifies where these threaded
screw inserts are used in the equipment. Also see TM 11-5820-890-30P-1.
Table 2-3. Threaded Screw Inserts
EQUIPMENT
LOCATION
SCREW INSERT
SIZE
QTY
TYPE
RT Chassis
where holding battery cover attaches
MA3330-102
M3x1
2
RT Chassis
where top cover attaches
MA3330-102
M3x1
13
RT Chassis
where bottom cover attaches
MA3330-102
M3x1
14
RT Chassis
where handle assembly attaches
MA3330-152
M3x1.5
4
RT Chassis
where guard assembly attaches
MA3330-152
M3x1.5
4
RT Chassis
where keypad attaches to front panel
MA3330-100
M2.2x1
4
Tools:
Threaded screw insert extractor
Thread cleaning tap
Hex wrench
Prewinder
Tang breakoff tool
Brace
References:
Figure 2-19 for illustration of process.
ITEM
ACTION
REMARKS
REMOVAL
a.
Threaded screw insert
Place in hole. Tap extractor to
For recessed M3 x 1 inserts, use
extractor (1)
seat in insert. Maintain steady
tool 1227-02. For all others, use
pressure on extractor and
tool 1227-6, or 1227-02, depend-
unscrew insert. Remove insert
ing on insert size.
from hole.
See figure 2-19 for illustration of
tool usage.
b. Thread cleaning tap (2)
Select proper size tap. Insert
and secure in brace (3). Start
carefully in hole. Screw tap to
bottom of hole. Unscrew tap.
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