TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 946 of 985

TM 9-2320-279-20-1

Electrical System Maintenance Instructions (Cont)

7-98. TACHOMETER SENDING UNIT REMOVAL/INSTALLATION.

This task covers:

a. Removal

c. Follow-on Maintenance

b. Installation

INITIAL SETUP

Models

References

All

None

Test Equipment

Equipment Condition

None

TM or Para

Condition Description

Special Tools

TM 9-2320-279-10 Engine cover open.

None

TM 9-2320-279-10 Engine side panel removed.

Supplies

Para 7-91

Batteries disconnected.

None

Special Environmental Conditions

None

Personnel Required

MOS 63S, Heavy wheel vehicle mechanic

General Safety Instructions

None

a. Removal.

(1)

Disconnect tachometer sending unit (1) at

connectors (2).

(2)

Loosen nut (3) and remove tachometer sending

unit (1) from tachometer drive (4).

b. Installation.

(1)

Install tachometer sending unit (1) on tachometer

drive (4) by alining tang with groove. Tighten

nut (3).

(2)

Connect connectors (2).

c. Follow-on Maintenance.

(1)

Connect batteries (para 7-91).

(2)

Start engine and check operation of tachometer

sending unit (TM 9-2320-279-10).

(3)

Shut off engine (TM 9-2320-279-10).

(4)

Install engine side panel (TM 9-2320-279-10).

(5)

Install engine cover (TM 9-2320-279-10).

END OF TASK

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