TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 650 of 1015

3-104. HORN

TM 9-2320-272-24-1

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

All

TOOLS

REFERENCES (TM)

TM 9-2320-272-10

TM 9-2320-272-24P

General mechanic’s tool kit (Appendix E, Item 1)

EQUIPMENT CONDITION

MATRIALS/PARTS

Parking brake set (TM 9-2320-272-10).

Battery ground cables disconnect (para. 3-126).

O-ring (Appendix D, Item 428)

1.

Remove three screws (6) and horn switch assembly (2) from steering column (1).

2.

Disconnect horn switch connector (9) from diode lead (3).

3.

Remove spring (11) and seat (4) from diode lead (3).

4.

Remove retaining ring (8), horn switch (7), and O-ring (10) from adapter (5). Discard O-ring (10).

1.

Install new O-ring (10), horn switch (7), and retaining ring (8) on adapter (5).

2.

Install seat (4) and spring (11) over diode lead (3).

3.

Connect horn switch connector (9) to diode lead (3).

4.

Install horn switch assembly (2) on steering column (1) with three screws (6).

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