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Accidental engine starting can cause injury or death to personnel working on the equipment.To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system.Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on.
Water Temperature Fault (WT)
The current flow for the circuit that is described in this section is applicable for all engines. The engine must be running at a speed with a coolant temperature that is hot enough to close the water temperature contactor switch (WTS). The water temperature contactor switch is normally open. The following events occur in the electric circuit in order to shut down the engine. The engine will shut down when the temperature of the coolant system is greater than the maximum temperature that is set for the WTS.
The water temperature contactor switch (WTS) closes across the contacts , which are normally open.
Closing the contacts (WTS-1) and (WTS-2) opens the circuit to slave relay (SR1) (line 33).
When the open circuit de-energizes (SR1) and (SR2), the circuit opens across the relay contacts (SR1-30) and (SR1-87) (line 43).
The open circuit de-energizes the fuel solenoid (FS) which shuts off the fuel flow to the engine. The starter motor circuit can then be engaged. However, there is no fuel flow to the engine and the engine cannot be restarted until the coolant temperature falls below the rating of the water temperature contactor switch. When the water temperature is below the maximum rating for the temperature of the WTS, the circuit opens across contacts (WTS-1) and (WTS-2). The slave relay (SR1) and the fuel solenoid (FS) can then be energized by the engine starting circuit in order to restart the engine.
To avoid possible engine damage or another immediate shutdown, the water temperature fault must be corrected before attempting to restart the engine.
Accidental engine starting can cause injury or death to personnel working on the equipment.To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system.Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on.
2301A Electric Governor Control
The 2301A Electric Governor Control activates all of the components that are in the electric protection system. The components are activated in the same manner when the nonelectric governor is used. One difference exists in the main circuit. The fuel shutoff solenoid (FSOS) (line 43) is not used.When the electric governor control is used, the engine must run in a normal condition in order for the electric circuit to operate in the manner that is described below.
Current flows from the terminals (TS-28) (line 30) and (TS-31) (line 31), which