freightliner NEW CASCADIA 2016, Driver Manual

Page: 26 / 207

dash, check the gauge with the engine off. If the yel-
low signal stays locked in the red zone once the en-
gine is shut down, or is at or above the values
shown in
Table 3.2 , the air cleaner element needs to
be replaced.
Air Intake Maximum Restriction Values (inH
2
O)
Engine Make
GHG14 and GHG17
Engines
Cummins 25
Detroit 18
Table 3.2, Air Intake Maximum Restriction Values
NOTE: Rain or snow can wet the filter and
cause a temporary high reading.
Application Air Pressure Gauge
An application air pressure gauge ( Fig. 3.4 ) registers
the air pressure being used to apply the brakes, and
should be used for reference only. The gauge will not
register air pressure until the foot brake pedal is de-
pressed or the trailer hand brake is applied.
Coolant Temperature Gauge
NOTICE
A sudden increase in coolant temperature may
indicate engine or cooling system failure. Bring
the vehicle to a safe stop and investigate the
cause to prevent further damage. Do not operate
the engine until the cause has been determined
and corrected.
During normal engine operation, the coolant tem-
perature gauge (
Fig. 3.1 , item 2) should read 175 to
195°F (79 to 91°C). If the temperature remains below
160°F (71°C), inspect the cooling system to deter-
mine the cause.
For Detroit engines, if coolant temperature rises
above the maximum temperature listed in
Table 3.3 ,
the CHECK engine lamp will illuminate. If the condi-
tion does not improve, the STOP engine lamp will
also illuminate and an audible warning will sound.
The engine will then derate or shut down, depending
on the type of engine protection system installed.
Maximum Coolant Temperature
Engine Make Temperature: °F (°C)
Cummins 225 (107)
Detroit 215 (101)
Table 3.3, Maximum Coolant Temperature
Drive Axle Oil Temperature Gauges
NOTICE
A sudden increase in oil temperature that is not
caused by a load increase may indicate mechani-
cal failure. Bring the vehicle to a safe stop and
investigate the cause to prevent further damage.
Do not operate the vehicle until the cause has
been determined and corrected.
During normal operation, drive axle oil temperature
gauges (
Fig. 3.5 ) should read as follows:
•
160 to 220°F (71 to 104°C) for Detroit ™ and
Meritor
™
drive axles
•
180 to 200°F (82 to 93°C) for Dana Spicer®
drive axles
Under heavy loads, such as when climbing steep
grades, temperatures that exceed the normal oil tem-
perature range for a short period are not unusual. If
the temperature returns to normal when the load de-
creases, there is no problem.
Engine Oil Pressure Gauge
NOTICE
A sudden decrease or absence of oil pressure
may indicate mechanical failure. Bring the vehicle
f611380 10/31/2016
Fig. 3.4, Application Air Pressure Gauge
Instruments
3.8