HARNESS AS-PANEL 1741436 - Caterpillar

ESS (CT) opens across (11 and 10) and closes across (11 and 12) to allow for restart.Emergency Stop Pushbutton
The emergency stop pushbutton (ESPB) is a red, mushroom shaped button located on both the engine junction box and the generator control panel. Either button will shut the engine down or prevent it from starting when pushed in. The emergency stop pushbutton should not be used for normal shutdown.The ESPB on the engine junction box shuts the engine down as follows: When pushed in, ESPB opens across terminals (1 and 2) (line 9) to open the starting motor circuit. ESPB also opens across terminals (8 and 7) (line 25) to open the circuit from ESS (CT) (11 and 10) through ESS (OS) (8 and 9); WTS; ENFR (2 and 8) (line 25); ECS (1 and 2) (line 25); ESPB (panel mounted) contacts (8 and 7) (line 24); OPS1 (1 and 2); ESS (OPSS) (14 and 13) and through OPS2 (1 and 2) to SR1. SR1 then de-energizes to open its contacts and de-energize the fuel solenoid (FS). This shuts off the fuel to the engine.When pushed in, ESPB closes across terminals (3 and 4) (line 23) to close the circuit from ESS (CT) (11 and 10) to slave relay (SR2). SR2 energizes to close its contacts (1 and 3) to energize the air shutoff solenoid (ASOS). ASOS shuts off air for combustion. At the same time, the circuit is completed from SR2 through diode (D11) to energize the engine failure relay (ENFR) (line 14) and turn ON the engine failure light (EFL) (line 15). ENFR closes across its contacts (7 and 4) (line 15) to complete a circuit through ECS contacts (5 and 6) (line 15) to latch relay (ENFR) and the light (EFL).The ESPB on the generator mounted panel (when pushed in) shuts down the engine as follows: When pushed in, ESPB opens across its terminals (1 and 2) (line 9) to open the starting motor circuit.When pushed in, ESPB opens across its terminals (8 and 7) to open the circuit (as described in engine mounted ESPB) to SR1. SR1 de-energizes to open its contacts (1 and 3) and de-energize the fuel solenoid (FS).When pushed in, ESPB closes across (5 and 6) (line 32) to complete a circuit from ESS (CT) (11 and 10) to SR2. SR2 energizes to close its contacts (1 and 3) and energize ASOS. This shuts off combustion air to the engine. With contacts ESPB (5 and 6) closed, current also flows through diode (D11) (line 28) to energize ENFR (line 14) and turn ON the engine failure light (EFL) (line 15). ENFR closes across its contacts (7 and 4) (line 15) to complete a circuit through ECS contacts (5 and 6) (line 15) to latch ENFR and EFL.
To prevent personal injury due to accidental starting of the engine, disconnect the batteries before doing maintenance or repair work.
Before starting the engine, do the following: 1. Turn the engine control switch (ECS) to the OFF/RESET position.2.