TM10-4320-226-14
2.1.5
TACHOMETER/HOURMETER (5). Indicates engine speed in revolutions per minute (RPM). Meter is graduated
in 100 RPM increments from 0 to 3000 RPM. The hourmeter portion of the gauge indicates the total number of hours
the engine has been operated.
2.1.6
AMMETER (6). Indicates alternator ampere output which indicates the batteries are charging or discharging.
Meter is graduated in 30 amp increments from 0 to +60 AMPS for charging and from 0 to -60 AMPS for discharging.
2.1.7
SUCTION (7). This gauge is marked SUCTION and indicates pump suction pressure and vacuum per square
inch (psi). Gauge is graduated in one unit increments from 0 to 30 PSI for both vacuum and pressure with numerals at
five unit intervals on the pressure side and at 10 unit intervals on vacuum side.
2.1.8
DISCHARGE (8). This gauge is marked DISCHARGE and indicates pump discharge pressure in PSI. Gauge
is graduated in 5 pound increments from 0 to 160 PSI with numerals at 20 PSI intervals.
2.1.9
HANDPUMP (9). Used to pressurize cold start reservoir. If outside air temperature is below +40°F (+5°C) cold
start system may be used to assist in starting engine. Handpump is not used on Model 350 PAWN.
2.1.10
THROTTLE (10). This control is only used on the unregulated models. Provides manual speed selection for the
350 GPM Pumping Assembly. Turning throttle control counterclockwise increases engine speed. Clockwise rotation
decreases engine speed.
2.1.11
PANEL LIGHTS (11). Provides light for the control panel. Model 350 PAWN has four panel lights mounted on
support brackets and equipped with aviator’s night vision hood. Other models have only one panel light control by a
rheostat or switch.
2.1.12
RHEOSTAT/SWITCH (12). Rheostat on the 350 PAWN is used to control illumination brightness of the four panel
lights. Other models uses a rheostat or switch to turn the panel light off and on.
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