Operation and maintenance manual

34 SEBU8601-01
Operation Section
Gauges and Indicators
Gauges and Indicators
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Gauges and In dicators
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.
Noticeab
le changes in gauge readings indicate
potential gauge or engine problems. Problems may
also be indicated by gauge readings that change
even if t
he readings are within specifications.
Determine and correct the cause of any significant
change in the readings. Consult your Perkins
distrib
utor 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 in
dicatorlampscanbeusedtoidentifythe
current operational status of the engine. The
indicator lamps can also indicate that the engine
has a f
ault. This system is automatically operated
via the ignition switch.
•
The i
ndicator lamps can be used to identify active
diagnostic codes. This system is activated by
pressing the Flash Code button.
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
SAE10W40is350to450kPa(50to65psi)atrated
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.
Jacket Water
Coolant Temperature –
Typical temperature range is 82° to 94°C
(179.6° to 169.2°F). This temperature range
will vary ac
cordingtoengineloadandtheambient
temperature.
A 100 kPa (14.5 psi) radiator cap must be installed
on the cooli
ng system. The maximum temperature
for the cooling system is 108° C (226.4° F). This
temperature is measured at the outlet for the
water temp
erature regulator. The engine coolant
temperature is regulated by the engine sensors
and the engine ECM. This programming cannot be
altered. A
n engine derate can occur if the maximum
engine coolant temperature is exceeded.
If the eng
ine is operating above the normal range,
reduce the engine load. If high coolant temperatures
are a frequent event, perform the following
procedu
res:
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
reduci
ng the load.
3. Inspect the cooling system for leaks. If necessary,
consul
t your Perkins distributor for assistance.
Tachometer – This gauge indicates engine
speed
(rpm). When the throttle control lever
ismovedtothefullthrottlepositionwithout
load, the engine is running at high idle. The engine is
runni
ng at the full load rpm when the throttle control
lever is at the full throttle position with maximum
rated load.
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.
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).
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.