TM 10-4610-241-24
TO 40W4-13-42
Section II. GENERAL MAINTENANCE
PROCEDURES
Paragraph
Replace Rivnuts.......................................................................................................................................
3-4
Threaded Inserts and Helicoils .................................................................................................................
3-5
Welding ...................................................................................................................................................
3-6
3-4.
REPLACE RIVNUTS.
This task consists of:
a.
Removal
b.
Installation
INITIAL SET-UP :
Tools Required
General Mechanics Tool Kit (Appendix B, Section III, Item 4).
Portable Electric Drill (Appendix B, Section III, Item 3).
Rivnut Installation Tool (Appendix B, Section III, Item 3).
Drill Set (Appendix B, Section III, Item 3).
Materials/Parts Required
Rivnuts
Equipment Condition
Power shut down (Power Source Manual)
a.
Removal
(1)
Select drill bit approximately 20% smaller then outer diameter of head.
(2)
Insert drill bit in electric drill.
CAUTION
Drilling deeper then thickness of head will enlarge mounting hole,
making installation of replacement rivnut difficult.
(3)
Drill into center of head, approximately as deep as thickness of head.
(4)
Use chisel and hammer and knock off head.
(5)
Punch out remainder of rivnut with drift pin.
b.
Installation.
(1)
Select installation tool to fit rivnut to be installed.
(2)
Assemble installation tool, consisting of bit and housing.
3-97
