TM 10-3950-672-10
f. Foot Throttle Pedal. The foot throttle pedal (7) is located on the right side cab floor. The pedal operates the
engine speed through a control cable. Depressing the pedal increases engine speed. Releasing the pedal
returns the engine to the idle speed.
g. Voltmeter. The voltmeter (BATTERY) (33) is located on the bottom left side of the main control panel. With the
IGNITION switch (28) in the ON position and before starting the engine, the voltmeter shows the condition of the
batteries. With the engine running, the voltmeter indicates output voltage of the alternator. The voltmeter
indicates voltage from 10 to 16 volts. Normal indication is from 12 to 14 volts.
h. Hourmeter. The hourmeter (3) is located on the right side of the main control panel. The engine HOURS
operates whenever the diesel engine is running.
i. Low Oil Pressure/High Engine Temperature Indicator. The LO OIL PRESS/HI ENG TEMP indicator (42) is
located on the right side of the main control panel. The system provides a warning for low pressure and/or high
water (coolant) temperature. The activation of either the oil pressure switch or water temperature switch will
illuminate the red indicator light and sound the buzzer. The low oil pressure switch activates if oil pressure is
between 2 to 5 psi (13.7 kPa/0.137 bar to 34.4 kPa/0.34 bar) and the water temperature switch activates if the
coolant temperature exceeds 205F (96C).
j. Cold Start Switch. The COLD START switch (6) is located on the lower right side of the main control panel and
is placarded with a caution. The switch is the pushbutton-type and is used to inject shots of starting aid into a
cold engine during starting. The ignition switch must be in the START position for quick start operation.
5-1.2
Accessory Controls and Indicators.
a. Horn Button Switch. The horn button switch (23) is located in the center of the steering wheel. Depressing the
horn sounds a lo-tone horn mounted on the front of the crane.
b. Turn Signal/Four-Way Flasher. The turn signal and four-way flasher switch (25) is located on the steering
column forward of the steering wheel. Positioning the turn signal lever (longer of the two levers on the switch) to
the left causes the left front and left rear turn signals to flash and positioning it to the right causes the right front
and right rear turn signals to flash. Pulling straight out on the short lever located behind the turn signal lever
causes all four turn signals to flash. The indicator light on the turn signal switch shows that the turn signals are in
operation by flashing simultaneously with the front and rear signals.
Push the short lever in to turn off the four-way flashers.
5-2
