TM 9-2320-283-10
BASIC DRIVING GUIDELINES
AVOID UNNECESSARY ENGINE IDLING
During long engine idling periods, the engine coolant temperature will fall below
the normal operating range. The incomplete combustion of fuel in a cold engine
will cause crankcase dilution, formation of lacquer or gummy deposits on the valves,
pistons, and rings, and rapid accumulation of sludge in the engine. When prolong-
ed engine idling is absolutely necessary, maintain at least 800 rpm.
FREQUENTLY CHECK GAGES AND INDICATORS
During normal driving conditions, at engine rpm range from 1800-2100 rpm, engine
oil pressure should be in a range from 35-50 psi.
ENGINE OIL PRESSURE
Engine water temperature should be above 160°F at the low end and up to 212°F
at the high end (normal water temperature should be from 180°F to 200°F). If
temperature reaches 220°F, shut down the engine and investigate the cause. The
air pressure gages should register at least 90 psi. (The low air pressure warning
lamp and buzzer come on at about 70 psi and below.) Normal operating range is
105-140 psi.
ENGINE WATER
AIR PRESSURE
AIR PRESSURE
TEMPERATURE
GAGE-FRONT
GAGE-REAR
TA 236675
2-62
