Features And Controls - Perkins 904D-E28T Operation And Maintenance Manual

M0108133-04

Features and Controls

Alarms and Shutoffs
Shutoffs
The shutoffs are electrically operated or mechanically
operated. The electrically operated shutoffs are
controlled by the ECM.
Shutoffs are set at critical levels for the following
items:
• Operating temperature
• Operating pressure
• Operating level
• Operating rpm
The particular shutoff may need to be reset before
the engine will start.
NOTICE
Always determine the cause of the engine shutdown.
Make necessary repairs before attempting to restart
the engine.
Be familiar with the following items:
• Types and locations of shutoff
• Conditions which cause each shutoff to function
• The resetting procedure that is required to restart
the engine
Alarms
The alarms are electrically operated. The operations
of the alarms are controlled by the ECM.
The alarm is operated by a sensor or by a switch.
When the sensor or the switch is activated, a signal is
sent to the ECM. An event code is created by the
ECM. The ECM will send a signal to illuminate the
lamp.
Your engine may be equipped with the following
sensors or switches:
Coolant temperature – The coolant temperature
sensor indicates high jacket water coolant
temperature.
Intake manifold air temperature – The intake
manifold air temperature sensor indicates high intake
air temperature.
Intake manifold pressure – The intake manifold
pressure sensor checks the rated pressure in the
engine manifold.
i07797317
Fuel rail pressure – The fuel rail pressure sensor
measures the high pressure or low pressure in the
fuel rail. The ECM will Check the pressure.
Engine oil pressure – The engine oil pressure
switch indicates when oil pressure drops below rated
system pressure, at a set engine speed.
Engine overspeed – If the engine rpm exceeds the
overspeed setting, the alarm will be activated.
Air filter restriction – The switch checks the air filter
when the engine is operating.
User-defined switch – This switch can shut down
the engine remotely.
Water in fuel switch – This switch checks for water
in the primary fuel filter when the engine is operating.
Fuel temperature – The fuel temperature sensor
monitors the pressurized fuel in the high-pressure
fuel pump.
NRS absolute pressure and NRS delta pressure –
A combined pressure sensor across the NRS valve.
Note: The sensing element of the coolant
temperature sensor must be submerged in coolant to
operate.
Engines may be equipped with alarms to alert the
operator when undesirable operating conditions
occur.
When an alarm is activated, corrective measures
must be taken before the situation becomes an emer-
gency in order to avoid possible engine damage.
If corrective measures are not taken within a
reasonable time, engine damage could result. The
alarm will continue until the condition is corrected.
The alarm may need to be reset.
Note: If installed, the coolant level switch and the oil
level switch are indicators. Both switches operate
when the application is on level ground and the
engine RPM at zero.
Testing
Turning the keyswitch to the ON position will check
the indicator lights on the control panel. All the
indicator lights will be illuminated for 2 seconds after
the keyswitch is operated. Replace suspect bulbs
immediately.
Operation Section
Features and Controls
NOTICE
35