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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.
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