Paccar MX Series User Manual

PEC017
5/3/2018 Page 13 of 105
Nonprogrammable Parameters
HEST Warning
Parameter Name
Default/Units
HEST Warning Temperature Activation Limit
DEFAULT = 842 °(F)
HEST Warning Temperature Deactivation Limit
DEFAULT = 833 °(F)
Activate/Deactivate Requirements
HEST Warning
ON (All)
OFF (Any)
Exhaust Temperature > HEST Warning
Temperature Activation Limit
Exhaust Temperature < HEST Warning
Temperature Deactivation Limit
Vehicle speed < HEST Warning Minimum
Vehicle Speed
Vehicle speed > HEST Warning
Maximum Vehicle Speed
Additional information
HEST Warning on the Driver Display
Figure 5.1 shows an example of the indicator on the driver display when the HEST
warning is ON.
Figure 5.1 – HEST Warning Light

Paccar MX Series Specifications

General

Engine Type	Diesel
Configuration	Inline 6-cylinder
Displacement	12.9 liters
Torque Range	1850 lb-ft
Emission Standard	GHG17
Bore	5.12 inches (130 mm)
Aspiration	Turbocharged
Fuel System	Common Rail