Idle Shutdown; Programmable Maximum Vehicle Speed; Operating Precautions; Cooling System Tips - RAM 2500 2023 Owner's Manual

136 STARTING AND OPERATING
I S
DLE HUTDOWN
This feature can be enabled so that the truck will
automatically shutdown when the truck has been idling for
a set period of time when the engine is at operating
temperature. Idle time can be set in 5 minute increments
between 5 and 60 minutes. See an authorized dealer to
enable this feature.
NOTE:
The idle shutdown timer is disabled while the Power Take
Off (PTO) is active.
P M
ROGRAMMABLE AXIMUM
S
PEED
This feature allows the owner to set a maximum vehicle
speed for the vehicle. The 2500 and 3500 Series
maximum vehicle speed can be set between 40 mph
(64 km/h) and 87 mph (140 km/h).
NOTE:
DO NOT set the maximum vehicle speed to a value greater
than what the vehicle tires are rated for.
O P
PERATING RECAUTIONS
Avoid Overheating The Engine
The temperature of the engine coolant (antifreeze) (a
mixture of 50% ethylene-glycol and 50% water) must not
exceed the normal range of the temperature gauge 240°F
(116°C) with a 21 psi (145 kPa) coolant pressure cap.
Usually the engine coolant (antifreeze) temperature
indicated during operation will be to the left of center in
the normal range of the gauge.
Avoid Low Coolant Temperature Operation
Continual operation at low engine coolant (antifreeze)
temperature below the normal range on the gauge 140°F
(60°C) can be harmful to the engine. Low engine coolant
(antifreeze) temperature can cause incomplete
combustion which allows carbon and varnish to form on
piston rings and injector nozzles. Also, the unburned fuel
can enter the crankcase, diluting the lubricating oil and
causing rapid wear to the engine.
C S
OOLING YSTEM
V
EHICLE
To reduce potential for engine and transmission
overheating in high ambient temperature conditions, take
the following actions:
 City Driving — When stopped, shift the transmission
into NEUTRAL and increase engine idle speed.
 Highway Driving — Reduce your speed.
 Up Steep Hills — Select a lower transmission gear.
 Air Conditioning — Turn it off temporarily.
Do Not Operate The Engine With Low Oil
Pressure
When the engine is at normal operating temperature, the
minimum oil pressures required are:
Idle 700 to 800 RPM
Full speed and load
If oil pressure falls to less than normal readings, shut
the engine off immediately. Failure to do so could result
in immediate and severe engine damage.
Do Not Operate The Engine With Failed
Parts
All engine failures give some warning before the parts fail.
T
IPS
Be on the alert for changes in performance, sounds, and
visual evidence that the engine requires service. Some
important clues are:
 Engine misfiring or vibrating severely.
 Sudden loss of power.
 Unusual engine noises.
 Fuel, oil or coolant leaks.
 Sudden change, outside the normal operating range, in
 Excessive smoke.
 Oil pressure drop.
10 psi (69 kPa)
30 psi (207 kPa)
CAUTION!
the engine operating temperature.