TM 10-4320-315-10
Table 2-1. Control Panel Controls and Indicators - (Cont)
Controls or indicators
Function
10.
PUMP DISCHARGE PRESSURE Gage
Indicates water pressure in psi at pump discharge port.
11.
ENGINE Switch
Three position toggle switch used to start, run and stop
engine START position is springloaded.
12.
AUTO THROTTLE Rheostat
Used to set desired water output pressure or engine
speed, in automatic mode of operation.
13.
AUTO SELECT Switch
Used to select engine speed or pump pressure in
automatic mode of operation. When SPEED is selected
engine speed remains constant regardless of pressure.
When PRESSURE is selected water pressure is constant
and engine speed varies. Depending upon the suction
and discharge pressure, the pressure controller feeds the
speed signal.
2-3
