SPIDER AS-FAN 3643027 - Caterpillar

Manual Stopping Operation
Control Panel Controls In Automatic Position; Manual ShutdownWhen switch (SW2) is moved to the STOP position, current flow is directly to the rack solenoid. The rack solenoid moves the fuel rack to the fuel OFF position. The initiating relay, run relay and auxiliary relay are de-energized. Switch (SW2) must be held in the STOP position until the engine stops.2301 Control System Application
The circuit illustrations that follow are basic schematics. DO NOT use them as complete wiring diagrams.AR Auxiliary relayCB Circuit breakerCR Cranking relayCT Cranking terminate relay (part of OS)D DiodeIR Initiating relayMS Magnetic switchOCT Overcrank timerOPS1 Oil pressure shutdown switchOPS2 Oil pressure switchOS Overspeed shutdown switchPS Pinion solenoidSM Starting motorSR1 Shutdown relaySW1 Automatic/Manual switchSW2 On/Off/Stop switchWT Water temperature shutdown switch Components of the 2301 control system: Automatic Starting Operations
When emergency power is needed, the initiating contactor closes. This energizes the initiating relay, the cranking relay, and connects the 2301 Governor to the battery. The cranking relay energizes the magnetic switch and the pinion solenoid. The starting motor is now connected to the battery. The starting operation starts. At the same time the overcrank timer is energized and starts to run.
Control Panel Controls In Automatic Position; Engine StartingAt 600 rpm the cranking terminate relay closes. Oil pressure switch (OPS2) closes at approximately 44 kPa (6.4 psi). This lets the 2301 control signal the actuator to move from low idle to the desired rpm. Oil Pressure also causes oil pressure shutdown switch (OPS1) to activate. The normally closed contacts open and the normally open contacts close. When oil pressure shutdown switch (OPS1) activates, the auxiliary relay is energized and current flow to the cranking relay stops. This de-energizes the magnetic switch and the pinion solenoid. The starting operation stops.If the engine does not start in 30 seconds, the overcrank timer contact closes. This energizes the shutdown relay and the alarm light. The shutdown relay stops current flow to the initiating relay. The current flow is then stopped to the 2301 Control.