34 SEBU8726-03 Operation Section Features and Controls Features and Controls Jacket Water Coolant Temperature – Typical temperature range is 79° to 94°C (174° to 201 °F). This temperature range will vary according to engine load and the ambient temperature. i05324913 Alarms and Shutoffs A 100 kPa (14.5 psi) radiator cap must be installed on the cooling system. The maximum temperature for the cooling system will depend on engine power. For engines that are 75kW and lower the maximin cooling temperature is 110° C (230° F). For engines that are above 75kW the maximin temperature is 108° C (226.4° F). The engine coolant temperature is regulated by the engine sensors and the engine ECM.
This programming cannot be altered. An engine derate can occur if the maximum engine coolant temperature is exceeded. The alarm is a warning to the operator that an abnormal operating condition has occurred. The shutoffs are set in order to protect the engine from damage. A shutoff can be triggered by pressure, temperature, engine speed, and electronic fault. The operator should become familiar with the warning lamps and shutdown lamps on the installed control panel before operating the application. For more information refer to this Operation and Maintenance Manual, “Monitoring System (Table for the Indicator lamps)”.
If the engine is operating above the normal range, reduce the engine load. If high coolant temperatures are a frequent event, perform the following procedures: i04316262 Gauges and Indicators 1. Reduce the load and the engine rpm. 2. Determine if the engine must be shut down immediately or if the engine can be cooled by reducing the load. Your engine may not have the same gauges or all of the gauges that are described. For more information about the gauge package, see the OEM information. 3. Inspect the cooling system for leaks. If necessary, consult your Perkins distributor for assistance. Gauges provide indications of engine performance. Ensure that the gauges are in good working order.
Determine the normal operating range by observing the gauges over a period. Tachometer – This gauge indicates engine speed (rpm). When the throttle control lever is moved to the full throttle position without load, the engine is running at high idle. The engine is running at the full load rpm when the throttle control lever is at the full throttle position with maximum rated load. Noticeable changes in gauge readings indicate potential gauge or engine problems. Problems may also be indicated by gauge readings that change even if the readings are within specifications. Determine and correct the cause of any significant change in the readings. Consult your Perkins distributor for assistance.
NOTICE To help prevent engine damage, never exceed the high idle rpm. Overspeeding can result in serious damage to the engine. Operation at speeds exceed- ing high idle rpm should be kept to a minimum. Some engine applications are equipped with Indicator Lamps. Indicator lamps can be used as a diagnostic aid. There are two lamps. One lamp has an orange lens and the other lamp has a red lens. Ammeter – This gauge indicates the amount of charge or discharge in the battery charging circuit. Operation of the indicator should be to the + side of 0 (zero). These indicator lamps can be used in two ways: The indicator lamps can be used to identify the current operational status of the engine.
The indicator lamps can also indicate that the engine has a fault. This system is automatically operated via the ignition switch. Fuel Level – This gauge indicates the fuel level in the fuel tank. The fuel level gauge operates when the START/STOP switch is in the on position. The indicator lamps can be used to identify active diagnostic codes. This system is activated by pressing the Flash Code button. Service Hour Meter – The gauge indicates total operating hours of the engine. Refer to the Troubleshooting Guide, “Indicator Lamps” for further information.