Gauges And Indicators; Indicator Lamps - Perkins 1104D-E44T Operation And Maintenance Manual

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Gauges and Indicators

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.
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.
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 dealer
or your distributor Perkins for assistance.
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.
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.
• The indicator lamps can be used to identify active
diagnostic codes.
Refer to the Troubleshooting Guide, "Indicator
Lamps" for further information.
NOTICE
If no oil pressure is indicated, STOP the engine. If
maximum coolant temperature is exceeded, STOP
the engine. Engine damage can result.
Engine Oil Pressure – The oil pressure
should be greatest after a cold engine is
started. The typical engine oil pressure
with SAE10W40 is 350 to 450 kPa ( 50 to 65 psi) at
rated rpm.
A lower oil pressure is normal at low idle. If the load is
stable and the gauge reading changes, perform the
following procedure:
1. Remove the load.
2. Stop the engine.
3. Check and maintain the oil level.
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allowable temperature at sea level with the
pressurized cooling system at 48 kPa (7 psi) is
103 °C (217.4 °F). Higher temperatures may occur
under certain conditions. The water temperature
reading may vary according to load. The
temperature reading should never exceed 7 °C
(44.6 °F) below the boiling point for the
pressurized system that is being used.
A 100 kPa (14.5 psi) radiator cap may be installed on
the cooling system. The temperature of this cooling
system must not exceed 112 °C (233.6 °F).
If the engine is operating above the normal range and
steam becomes apparent, perform the following
procedure:
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.
3. Inspect the cooling system for leaks.
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.
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.
indicator should be to the " " +" " side of " " 0" " (zero).
STOP" " switch is in the " " on" " position.

Indicator Lamps

There are four main indicator lamps that are
available.
Features and Controls
Gauges and Indicators
Jacket Water Coolant Temperature –
Typical temperature range is 83° to 95°C
(181.4° to 171°F). The maximum
Tachometer – This gauge indicates
engine speed (rpm). When the throttle
control lever is moved to the full throttle
NOTICE
Ammeter – This gauge indicates the
amount of charge or discharge in the
battery charging circuit. Operation of the
Fuel Level – This gauge indicates the
fuel level in the fuel tank. The fuel level
gauge operates when the " " START/
Service Hour Meter – The gauge
indicates total operating hours of the
engine.
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