TM10-4320-226-14 SECTION I. DESCRIPTION AND USE OF OPERATOR’S CONTROLS AND INDICATORS 2.1 OPERATOR CONTROLS AND INDICATORS. The control panel is located on the front of the 350 GPM Pumping Assembly. It contains the operating controls and indicators. The control panel is illustrated in Figure 2-1. Table 2-1 and paragraphs 2.1.1 through 2.1.12 are keyed to figure  2-1. Table  2-1.  CONTROLS  AND  INDICATORS. Item No. Item  Name Description   and   Purpose 1   EMERGENCY   STOP 2  PUSH  TO  START 3  PUSH  FOR  OIL  PRESSURE BYPASS Pull-Push switch to control 12 V DC to start circuit, Spring  loaded  switch  to  start  engine. Spring  loaded  switch  to  bypass  oil  pressure  circuit, 4   OIL PRESSURE Gauge to indicate oil pressure. I I 5      TACHOMETER/HOURMETER Gauge to indicate engine speed and engine operating hours. 6    AMMETER Gauge  to  indicate  ampere(battery  charging  or  discharging) 7   SUCTION 8   DISCHARGE Gauge  to  indicate  input  pressure. Gauge  to  indicate  output  pressure. 9  Handpump Used for cold starts. (Not used Model 350 PAWN) I 10 11 Engine   Throttle Panel   Lights Rheostat/Switch Control  for  engine  speed. Provides lighting for the control panel. Panel lights are mounted on brackets. and equipped with aviator’s night vision hood. Model 350 PAWN  has  four  panel  lights  while  other  models  have  one. Controls  illumination  of  the  panel  lights.  On  Model  350  a  rheostat controls  illumination  by  turning  the  knob  clockwise  or  counterclockwise. Other  models  have  a  switch  to  turn  the  panel  light  off  or  on. 12 2.1.1 EMERGENCY STOP (1). This switch is a push-pull type switch and is marked EMERGENCY STOP. Switch is pulled out during engine start cycle and remains pulled out while engine is operating. When an emergency occurs, EMERGENCY STOP switch is pushed in immediately to shut down engine operation. When the 350 GPM Pumping Assembly is to be shutdown, EMERGENCY STOP switch is used to stop engine. 2.1.2 PUSH TO START (2). This switch is a pushbutton type switch and is used to start engine. Switch is pushed in and held during engine start to activate K3 start relay. Switch must be released upon ignition of engine. 2.1.3 OIL PRESSURE BYPASS (3). This switch is a pushbutton type switch and is used to bypass oil pressure sensing circuits.  Switch  must  be  pushed  in  simultaneously  with  start  switch  during  engine  start.  Oil  pressure  bypass  switch  must be  released  after  oil  pressure  buildup. 2.1.4 OIL  PRESSURE  (4).  This  gauge  indicates  engine  oil  pressure  by  pounds  per  square  inch  (PSI).  Gauge  is graduated  in  10  pound  increments  from  0  to  80  PSI. 2 - 2    C h a n g e2