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 622 of 1015

3-90. SPEEDOMETER

TM 9-2320-272-24-1

THIS TASK COVERS:

a. Removal

b. Inspection

c. Installation

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

All

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

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

EQUIPMENT CONDITION

Torque wrench (Appendix E, Item 144)

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

MATERIALS/PARTS

Five tiedown straps (Appendix D, Item 690)

GAA grease (Appendix C, Item 28)

1.

Remove screw (5), washer (4), two clamps (2), speedometer driveshaft (6), and clamp (3) from air

intake manifold (1).

2.

Remove eight screws (11) from instrument cluster (10) and pull away from instrument panel (9).

3.

Loosen shaft nut (7) and disconnect speedometer driveshaft (6) from speedometer (8).

4.

Remove nut (15), screw (20), and clamps (19) and (14) from bracket (16) on engine bell

housing (18).

5.

Remove screw (17) and bracket (16) from engine bell housing (18).

6.

Remove clamp (19) from speedometer driveshaft (6).

7.

Remove screw (23) and clamp (22) from transfer case (21).

8.

Remove clamp (22) from speedometer driveshaft (6).

9.

Disconnect shaft nut (24) from transfer case input gear cover (25).

10.

Remove five tiedown straps (26) from speedometer driveshaft (6). Discard tiedown straps (26).

11.

Remove speedometer driveshaft (6) and grommet (13) from firewall (12).

12.

Remove grommet (13) from speedometer driveshaft (6).

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