SHUTOFF AND ALARM SYSTEM COMPONENTS TESTING AND ADJUSTING PRESSURE SWITCH WITH TIME DELAY Tools Needed: 8M2743 Gauge. 8S4627 Circuit Tester. 1. Remove the pressure switch (2) from the tee. OIL PRESSURE SWITCH WITH TIME DELAY INSTALLED 1.  Damper.  2.  Pressure switch.  3.  Valve. 2. Install   a   short   nipple,   shutoff   valve   and   short nipple    and    another    tee    in    the    place    of    the pressure switch (2).  Make sure that the valve is closed. 3. Install   the   pressure   switch   (2)   and   a   8M2743 Gauge in the open ends of the tee. 4. Connect  the  8S4627  Circuit  Tester  between  the terminals of the pressure switch. TEST TOOLING INSTALLED 5. Start the engine.  Open the shutoff valve a small amount.    Look  at  the  pressure  on  the  8M2743 Gauge.    When  the  pressure  gets  to  the  range given  in  the  specifications,  the  circuit  light  must go on. 6. Close the shutoff valve.  Stop the engine.  Open the  shutoff  valve  a  small  amount.    Look  at  the pressure   on   the   8M2743   Gauge.      When   the pressure     gets     to     the     range     given     in     the specifications.        close    the    valve.        After    five minutes  open  the  valve  fully.    The  circuit  tester light must stay on a minimum of 30 seconds and a maximum of 15 minutes after the valve is fully opened. SHUTOFF SOLENOIDS 1. Make  sure  the  linkage  to  which  the  solenoid  is connected  does  not  give  more  than  the  normal amount of restriction. 2. Connect  a  voltmeter  between  the  terminals  of the solenoid. 3. Activate   the   solenoid   circuit.      If    the    voltage shown   on   the   meter   is   less   than   the   needed voltage, the circuit has a failure.  Check the other components  of  the  circuit.    If  the  voltage  is  the same or more than the needed voltage.  make a replacement of the solenoid. SYSTEM VOLTAGE NEEDED VOLTAGE 6 5.0 12 10.5 24 21.5 32 29.0 CONTACTOR SWITCH FOR OVERSPEED The   original   setting   of   the   contactor   switch   for overspeed  will  stop  the  engine  when  the  engine  rpm  is more than 18% above full load rpm.  DO NOT check the adjustment of the contactor switch on the engine. Off Engine Adjustment Tools Needed: 4S6553 Engine Test Group. 8S4627 Circuit Tester. 5L2277 Adapter. Reversible Variable Speed Drill. 1. Connect  the  I  P7443  or  4S6991  Tachometer  of the  4S6553  Group  to  the  tachometer  generator (2). 2. Connect the 5L2277 Adapter (3) to the contactor switch and tachometer generator (2). 3. Install  variable  speed  drill  (4)  to  the  adapter  as shown. CHECKING CONTACTOR SWITCH FOR OVERSPEED 1.      4S6553   Engine   Test   Group.      2.      Tachometer generator.    3.    5L2277  Adapter.    4.    Variable  speed drill. 5. 8S4627 Circuit Tester. 67