SHAFT-OUTPUT 1T1755 - Caterpillar

Engine Electrical System
Illustration 1 g01339089
(1) Warning lamp (alternator)
(2) Warning lamp (oil pressure)
(3) Warning lamp (coolant temperature)
(4) Fuel shutoff solenoid
(5) Alternator
(6) Engine oil pressure switch
(7) Coolant temperature switch
(8) Glow plugs
(9) Signal for glow plugs
(10) Ignition switch
(11) Electric starting motor
(12) Battery The electrical system has two separate circuits.
Charging circuit
Starting circuitSome of the electrical system components are used in more than one circuit. The following items are common in each of the circuits:
Battery
Circuit breaker
Cables
Wires for the batteryThe charging circuit is in operation when the engine is running. An alternator converts mechanical energy to electrical energy for the charging circuit. A voltage regulator in the circuit controls the electrical output in order to keep the battery at full charge.
The disconnect switch, if equipped, must be in the ON position in order to let the electrical system function. There will be damage to some of the charging circuit components if the engine is running with the disconnect switch in the OFF position.
If the engine has a disconnect switch, the starting circuit can operate only after the disconnect switch is put in the "ON" position.The starting switch is in operation only when the start switch is activated.The charging circuit is connected through the ammeter. The starting circuit is not connected through the ammeter.Automatic Shutdown System
Wiring Diagram for a 15 Amp Alternator
Illustration 2 g01339109
(1) Warning lamp (alternator)
(2) Regulator
(3) Alternator
(4) Battery
(5) Electric starting motor
(6) Warning lamp (oil pressure)
(7) Engine oil pressure switch
(8) Warning lamp (coolant temperature)
(9) Coolant temperature switch
(10) Fuse
(11) Ignition switch
(12) Signal for glow plugs
(13) Glow plugs
(14) Fuel shutoff solenoid
(15) Automatic shutdown device
(16) Electrical connector
(17) Delay fuse Wiring Diagram for a 40 Amp Alternator
Illustration 3 g00916844
(1) Warning lamp (alternator)
(2) Alternator
(3) Battery
(4) Electric starting motor
(5) Warning lamp (oil pressure)
(6) Engine oil pressure switch
(7) Warning lamp (coolant temperature)
(8) Coolant temperature switch
(9) Fuse
(10) Fuse
(11) Ignition switch
(12) Signal for glow plug
(13) Glow plugs
(14) Fuel shutoff solenoid
(15) Automatic shutdown device
(16) Electrical connector
(17) Delay fuse Wiring Diagram for a 55 Amp Alternator
Illustration 4 g00916845
(1) Warning lamp (alternator)
(2) Alternator
(3) Battery
(4) Electric starting motor
(5) Warning lamp (oil pressure)
(6) Engine oil pressure switch
(7) Warning lamp (coolant temperature)
(8) Coolant temperature switch
(9) Fuse
(10) Ignition switch
(11) Signal for glow plug
(12) Glow plugs
(13) Fuel shutoff solenoid
(14) Automatic shutdown device
(15) Electrical connector Wiring Diagram for a 65 Amp Alternator and a 85 Amp Alternator
Illustration 5 g01519204
(1) Warning lamp (alternator)
(2) Alternator
(3) Battery
(4) Electric starting motor
(5) Tachometer
(6) Warning lamp (oil pressure)
(7) Engine oil pressure switch
(8) Warning lamp (coolant temperature)
(9) Coolant temperature switch
(10) Fuse
(11) Ignition switch
(12) Signal for glow plug
(13) Glow plugs
(14) Fuel shutoff solenoid
(15) Automatic shutdown device
(16) Electrical connector Electrical Connector
Illustration 6 g00841411
Connector for the automatic shutdown device (typical example)
(1) Ignition switch (red wire)
(2) Ignition switch (orange wire)
(3) Fuel shutoff solenoid (red and black wire)
(4) Engine oil pressure switch (brown wire)
(5) Coolant temperature switch (blue wire)
(6) Ground (black wire) Automatic Shutdown Conditions
The engine will shut down if the following conditions continue for more than 10 seconds while you start the engine or for 2 seconds while you operate the engine:Coolant temperature exceeds the following values: All engines ... 110° 3°C (230° 5°F)Engine oil pressure falls