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 498 of 985

TM 9-2320-279-20-1

Fuel System Maintenance Instructions (Cont)

4-13. THROTTLE TREADLE VALVE TESTING (CONT).

(3)

(4)

(5)

(6)

If air comes out of exhaust

port (2) when throttle

treadle valve (1) is pressed,

or if there are air leaks at

seam (3) of valve body,

replace throttle treadle

valve (para 4-14).

Inspect roller (4) for

freedom of movement.

Inspect all fasteners and

retaining rings (5) to make

sure fasteners and retaining

rings are correctly installed.

If throttle treadle valve

operation is sticky or other

mechanical defects are

found, replace throttle

treadle valve (para 4-14).

b. Follow-on Maintenance.

END OF TASK

4-14. THROTTLE TREADLE VALVE 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 Shut off engine.

None

TM 9-2320-279-10 Air system drained.

Supplies

Special Environmental Conditions

Compound, sealing, pipe thread, Item 18,

None

Appendix C

Tags, identification, Item 48, Appendix C

General Safety Instructions

None

Personnel Required

MOS 63S, Heavy wheel vehicle mechanic

4-48