TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 205 of 1563

TM 9-2815-220-24

THREADED INSERT REPLACEMENT

0030 00

THIS WORK PACKAGE COVERS:

Removal, Cleaning, Inspection, Repair, and Installation

INITIAL SETUP:

Tools:

Compressed air

General mechanic’s tool kit (item 121, WP 0176)

Electric drill, portable (item 34, WP 0176)

Extractor tool (item 39 or 40, depending on insert

size, WP 0176)

Slimsert tool kit (item 122, WP 0176)

Thread die & tap set (item 120, WP 0176)

Expendable and Durable Items:

Cleaning solvent (item 8, WP 0173)

Goggles (item 23, WP 0173)

Lubricating oil (item 21, WP 0173)

Sealant compound (item 30, WP 0173)

Personnel Required:

Track Vehicle Repairer (1) 63H10

To permit higher stresses on studs and bolts that are set in aluminum castings, it is common

practice to install inserts of a stronger metal into which the studs or bolts are threaded.

Helical-coil and screw thread inserts are designated to perform this function.

The AVDS-1790

family of engines incorporates helical-coil inserts in many locations as original equipment.

If

the hole in which the original insert is installed becomes oversize, a threaded insert may be

used in its place to allow the original size fastener to be used.

REMOVAL

1. Verify type of insert.

a. If insert is swage type, go to step 2.

b. If insert is lock-ring type, go to step 4

2. Removal of swage type insert (1).

a. Using portable electric drill and

extractor tool (2), drill out top of

insert (1) to counterbore depth (A).

3. Remove insert (1).

a. Insert drive wrench (3) into insert (1).

b. Using ratchet handle and drive

wrench, unscrew insert (1).

c. Go to Cleaning.

3

2

1

1

A

WP 0030 00-1