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 634 of 1015

3-95. TACHOMETER

TM 9-2320-272-24-1

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

M939A2

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

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

EQUIPMENT CONDITION

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

Hood raised and secured (TM 9-2320-272-10).

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

1.

Remove eight screws (3) and pull instrument cluster (2) from instrument panel (1).

2.

Disconnect tachometer drive cable (8) from tachometer pulse sensor (7).

3.

Disconnect plug (4) from connector (5).

4.

Remove tachometer pulse sensor (7) from tachometer gauge (6).

1.

Install tachometer pulse sensor (7) on tachometer gauge (6).

2.

Connect plug (4) to connector (5).

3.

Connect tachometer drive cable (8) to tachometer pulse sensor (7).

4.

Install instrument cluster (2) on instrument panel (1) with eight screws (3).

FOLLOW-ON TASKS:

Connect battery ground cables (para. 3-126).

Start engine (TM 9-2320-272-10) and test tachometer for proper operation.

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