GENERAL - THREAD INSERTS

TM 5-5420-279-23

5 - 160 GENERAL - THREAD INSERTS

This task covers:

a. Remove

b. Install

INITIAL SETUP:

Tools Required

Tool Kit, General Mechanic's, Automotive (GMTK)

Shop Set Contact Maintenance Truck HMMWV

Materials Required

Thread insert (As required)

Equipment Conditions

Access to assembly

NOTE

The following general procedure is applicable for changing damaged thread inserts.

Remove

(1)

Using the extracting tool, apply the blade to the top of the threaded insert (View A-A).

(2)

Apply pressure in the direction of arrow 'B' and turn extracting tool counter-clockwise.

(3)

Extract the threaded insert and discard.

(4)

Clean out the tapped hole with a suitable sized bottoming tap.

Install

(1)

Using the inserting tool, withdraw the mandrel and place the new insert in the chamber, the

tang must be towards the nozzle.

(2)

Rotate the mandrel clockwise thru the insert until it engages with the tang.

(3)

Continue to rotate the mandrel clockwise until the thread insert is engaged and flush with

the face of the nozzle.

(4)

Place the inserting tool squarely over the tapped hole and continue to rotate the mandrel

clockwise until the threaded insert is transferred in to the tapped hole. Do not apply

pressure to the tool.

(5)

Remove the inserting tool.

(6)

Using the tang break off tool, place the tool inside the threaded insert against the tang at

face 'A'.

(7)

Holding the tool with the left hand strike the head of the tool 'C' and break off the tang.