TM-9-2320-365-20-1

M1078 SERIES, 2 1/2-TON, 4 X 4, LIGHT MEDIUM TACTICAL VEHICLES (LMTV)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; UNIT MAINTENANCE; VOLUME NO. 1 OF 5

FEBRUARY 2006

CHANGE 3

TM-9-2320-365-20-1 - Page 232 of 1760

KNOWN INFO

TEST OPTIONS

YES

WARNING

CAUTION

Read WARNING and

CAUTION on

following page.

Visual Inspection

REASON FOR QUESTION

Does cooling system leak

externally?

If external leaks are present,

upper coolant hose, lower

coolant hose, radiator overflow

tank hose(s), or radiator

overflow tank is faulty.

Perform Cooling System Troubleshooting

(d2. Oil in Cooling System).

Replace upper coolant hose (para 6-9),

lower coolant hose (para 6-10), radiator

overflow tank hose(s), or radiator overflow

tank (para 6-3).

NO

TM 9-2320-365-20-1

7.

Coolant level OK.

Radiator core free of debris.

WATER TEMP gage OK.

Radiator OK.

Loss of pressure in cooling

system.

Radiator fan shroud OK.

Water pump OK.

Thermostat OK.

Fan clutch OK.

POSSIBLE PROBLEMS

Faulty upper and lower coolant

hoses.

Faulty radiator cap.

Faulty radiator overflow tank

and hoses.

2-140

Change 2

d1. ENGINE OVERHEATS (CONT)