RAPID ENGINE WARM-UP (Contd)

TM 9-2320-386-10

2-14. RAPID ENGINE WARM-UP (Contd)

CAUTION

Shifting between neutral and drive is essential since continuous oper-

ation in gear with the brakes locked will overheat the transmission

and cause serious damage. Ensure transmission temperature gauge

does not exceed 200F (93C) during the following procedures.

NOTE

Use only the accelerator pedal to achieve an engine idle speed of

1400 rpm.

a. Apply service brake (8) and engage parking brake by pulling parking brake

lever (7) up. Place the transmission shift lever (6) in DRIVE position and accelerate

to 1400 rpm for 30 seconds using accelerator pedal (9).

b. Return engine to normal idle (750-850 rpm), place transmission shift lever (6)

in NEUTRAL, apply service brake (8), depress the accelerator pedal (9) to increase

engine rpm to 1200 rpm for 30 seconds, then return engine to normal idle.

c. Repeat steps a. and b. for a total of 8 minutes or until engine temperature is

160F (71C).

d. Pull temperature control knob (2), move heater switch (4) to HIGH, and wind-

shield wiper control to HIGH.

CAUTION

Ensure engine reaches and maintains an operating tempera-

ture of 160F (71C) or above prior to or during step e. If engine

temperature does not reach 160F (71C) or falls below this

temperature, repeat steps a. and b. until correct engine tem-

perature is maintained.

e. Place transmission shift lever (6) in NEUTRAL and pull throttle control (3) to

increase engine rpm to 2150 until normal operating temperature is achieved.

f. Perform steps j. and k. of para. 2-12.

Change 2

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