Water Temperature Gauge - Peterbilt 348 2017 Operator's Manual

Water Temperature Gauge

The water temperature gauge shows
the temperature of the engine coolant.
Under normal operating conditions
the water temperature gauge should
register between 165° and 205°F (74°
and 90°C). Under certain conditions,
somewhat higher temperatures may
be acceptable. But the maximum
allowable temperature is 210°F (99°C)
with the cooling system pressurized,
except for certain special engines.
Check your engine manual to be sure.
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Engine Overheating
WARNING!
Do not remove the radiator fill cap
while the engine is hot. Scalding
steam and fluid under pressure may
escape and cause serious personal
injuries. You could be badly burned.
• Wait until the coolant
temperature is below 122°F
(50°C).
• Protect face, hands, and arms
by covering the cap with a large,
thick rag to protect against
escaping fluid and steam.
• Carefully and slowly turn the
cap one-quarter of a turn or
until it reaches the first stop—
allowing excess pressure to
escape—push down and turn for
final removal.
Wait until the coolant temperature is
below 122° F (50°C). Protect your
Y53-6060-1C1
STANDARD GAUGES
face, hands, and arms by covering the
cap with a large, thick rag to protect
you against escaping fluid and steam.
Before you completely remove the
cap, carefully and slowly turn the cap
part way to allow excess pressure to
escape. Then push down and turn for
final removal.
The cooling system may overheat if
the coolant level is below normal or if
there is a sudden loss of coolant (such
as a worn hose splitting). It may also
temporarily overheat during severe
operating conditions such as climbing
a long hill on a hot day or stopping
after high-speed driving.
If the "Engine Coolant Temperature"
warning light comes on, or you have
any other reason to suspect the engine
may be overheating:
•
Stop the vehicle, but DO NOT
TURN OFF THE ENGINE unless a
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