ELBOW 9V4466 - Caterpillar

Illustration 1 g00509917
Wiring Diagram for the Instrument Panel (1) Light switch (2) Panel lights (3) Instrument panel (4) Ammeter (5) Oil pressure gauge (6) Water temperature gauge (7) Gear oil pressure gauge (8) Terminal strip (9) Battery wire (10) Oil pressure switch with time delay (11) Sending unit for oil pressure (12) Sending unit for water temperature (13) Sending unit for gear oil pressure
Illustration 2 g00509918
Gauges with Resistors for 32 Volt System (1) Resistor (2) Oil pressure gauge (3) Resistor (4) Water temperature gauge (5) Resistor (6) Gear oil pressure gauge
Illustration 3 g00509919
Resistor for 32 Volt System (65 Ohms)Indicators and Sending Units
Sending Unit for the Water Temperature
Illustration 4 g00509920
Sending Unit for the Water Tempartaure (1) Connection (2) Bushing (3) BulbThe sending unit for the water temperature is an electrical resistance. The sending unit for the water temperature changes the value of the resistance according to the temperature which bulb (3) feels.The sending unit is in a series circuit with the electrical indicator. When the temperature is high, the resistance is high. This makes the indicator have a high reading.The sending unit must contact the coolant. If the coolant level is too low because of a sudden loss of coolant while the engine is running or because the level is too low before starting the engine, the sending unit will not work correctly.Sending Unit for the Oil Pressure
Illustration 5 g00509921
Sending Unit for the Oil Pressure (1) Connection (2) BushingThe sending unit for oil pressure is an electrical resistance. The sending unit for oil pressure has a material which changes electrical resistance according to pressure which the unit feels.The sending unit for oil pressure is in a series circuit with the electrical indicator. As the pressure on the sending unit changes, the reading on the indicator changes in the same way.Electric Hour Meter
Illustration 6 g00509922
Hour Meter Wiring Diagram (1) Electrical hour meter (2) Pressure switch (3) Alternator wire or battery wireElectric hour meter (1) measures the clock hours that the engine operates. The hour meter activates when pressure switch (2) closes. Pressure switch (2) closes the circuit from the positive terminal on the alternator or the battery when the engine oil pressure is above approximately 40 kPa (6 psi).Electric Tachometer Wiring
Illustration 7 g00509923
(1) Magnetic pickup (2) Terminal connections (terminal 7 and 8 on standby governor control) (3) Tachometer (4) Ground connection (governor control chassis ground) (5) Governor control terminal strip (6) Wiring connections (second tachometer circuit) (7) All wire must be 22AWG shielded cable or larger (8) Dual speed switch terminal strip (9) Ground connection to the engineWiring Diagram
Table 1 gives the correct sizes and color codes.
Table 1
Color Code     Total Maximum Recommended Length of the Battery Cable (11)     Wires that are Marked #X    
B-Black     Cable Size     Electric Starting     Output of the Charging Unit     Wire Size    
W-White         12 Volt     24 to 32 Volt     0 to 18 amp     #14    
R-Red     0     4.0 ft