Electrical Components For The Monitoring System
The electrical system for the monitoring system consists of the following components:
- Pressure Switch (Propel Hydraulic System)
- Pressure Switch (Vibratory Hydraulic System)
- Temperature Switch (Hydraulic System)
- Action Alarm
- Indicators (Alert)
Pressure Switch (Propel Hydraulic System)
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| Illustration 1 | g00932594 |
The pressure switch for the propel hydraulic system signals the engine ECM of low charge pressure.
The switch is a two-position pressure switch. The switch has a set of normally open contacts and normally closed contacts. The circuit only utilizes the normally open contacts. The switch is activated at 1400 kPa (203 psi) and the switch is deactivated at 1100 kPa (160 psi).
Pressure Switch (Vibratory Hydraulic System)
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| Illustration 2 | g00932594 |
The pressure switch for the vibratory hydraulic system signals the engine ECM of low charge pressure.
The switch is a two-position pressure switch. The switch has a set of normally open contacts and normally closed contacts. The circuit only utilizes the normally open contacts. The switch is activated at 1400 kPa (203 psi) and the switch is deactivated at 1100 kPa (160 psi).
Temperature Switch (Hydraulic System)
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| Illustration 3 | g00932600 |
The temperature switch for the hydraulic system signals the engine ECM of high hydraulic oil temperature.
The switch is a two-position temperature switch. The switch has a set of normally open contacts and normally closed contacts. The circuit only utilizes the normally closed contacts. The switch is activated at 92° ± 1.5°C (197.6° ± 2.7°F) and the switch is deactivated at 85 °C (185 °F).
Action Alarm
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| Illustration 4 | g00932601 |
The action alarm warns the operator of a potential serious problem.
The action alarm creates a noise of approximately 90 dB. When a category 3 warning is detected, the engine ECM activates the action alarm .
Indicators (Alert)
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| Illustration 5 | g00932605 |
The alert indicators warn the operator of potential problems.
The engine ECM performs a self test on the lamps upon start-up. When the key start switch is switched to the ON position, the engine ECM will individually illuminate the lamps for one second. The self test is not performed on the "alternator" LED.
| Alternator - The amber LED illuminates when the alternator is not producing sufficient power. The LED will illuminate when the alternator voltage at the B+ terminal is lower than the voltage at the D+ terminal. The difference in voltage at the alternator terminals allows current in the 309-GY wire to flow through the alternator resistor. When the voltage difference is lower than 2.5 V, the LED will illuminate. |
| Low Hydraulic Oil Pressure - The red LED illuminates when the hydraulic oil pressure for the propel system or the vibratory system is too low. The LED receives the signal from the engine ECM. |
| High Hydraulic Oil Temperature - The red LED illuminates when the hydraulic oil temperature is too high. The LED receives the signal from the engine ECM. |
| Engine Starting Aid - The amber LED illuminates when the engine starting aid is active. The LED receives the signal from the engine ECM. |
| Action Lamp - The red LED illuminates when a category 2 warning is active. The LED receives the signal from the engine ECM. |
| Check Engine Status or Electrical Fault - The amber LED illuminates when a diagnostic code has been detected. The LED receives the signal from the engine ECM. |
| High Inlet Manifold Temperature - The amber LED illuminates when the engine ECM detects high temperature at the inlet manifold. The LED receives the signal from the engine ECM. |
| Low Engine Oil Pressure - The red LED illuminates when the engine oil pressure is too low. The LED receives the signal from the engine ECM. |
| High Engine Coolant Temperature - The red LED illuminates when the engine oil temperature is too high. The LED receives the signal from the engine ECM. |