TM-9-2320-365-10

M1078 SERIES, 2-1/2 TON, 4x4, LIGHT MEDIUM TACTICAL VEHICLES (LMTV)

OPERATOR'S INSTRUCTIONS MANUAL

AUGUST 2005

CHANGE 2

TM-9-2320-365-10 - Page 238 of 836

TM 9-2320-365-10

2-21. VEHICLE OPERATION (CONT)

NOTE

• Water Temperature must be a minimum of 100

°

F (38

°

C) in order to

drive vehicle. Engine will warm up to normal operating temperature of

165

°

F (74

°

C) more quickly if engine is under a load condition such as

driving.

• Vehicle performance, including heater/defroster, will be reduced when engine

operating temperature is between 100

°

F to 165

°

F (38

°

Cto 74

°

C). Avoid

conditions requiring maximum performance until engine reaches 165

°

F (74

°

C).

(11) Operate engine at idle (750 rpm) to warm-up engine until WATER TEMP gage (11)

reaches a minimum of 100

°

F (38

°

C) to begin driving or normal operating

temperature of 165

°

F (74

°

C).

NOTE

Perform step (12) in outside temperatures of 32

°

F to -25

°

F(0

°

Cto-32

°

C),

if extreme or unusual conditions exist such as heavy windshield frost or when

it is difficult to achieve normal operating temperature of 165

°

F (74

°

C).

(12) Perform Rapid Engine Warm-Up (para 2-59).

(13) Check that WATER TEMP gage (11) reads between 100

°

Fto230

°

F (38

°

Cto110

°

C).

If WATER TEMP gage reads in the red zone or high engine temperature

indicator (12) is illuminated, shut down engine (para 2-21f) and perform Engine

System Troubleshooting (para 3-3).

2-138

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