Engine Overview
DANGER
Do not use ether or other combustible starting aids in any MACK engine. Introduction of ether or similar starting aids could
cause a fire or explosion resulting in severe property damage, serious personal injury or death.
CAUTION
DO NOT crank the engine for more than 30 seconds at a time; wait 15 minutes after each try to allow the starter to cool.
Failure to follow these instructions could cause starter damage.
Note:
Some starters are equipped with starter protection. If the engine is running, the starter temperature is too high, the
transmission is not in neutral or the clutch pedal is not depressed, starter engagement is inhibited.
Allow the engine to slow down and idle for 3 to 5 minutes before shutting it off. This allows the turbocharger to cool down and
the cooling system to dissipate the engine heat. Switch the engine off by turning the ignition key to the OFF position.
CAUTION
Shutting off an engine immediately after high speed or full load operation can damage the turbocharger and cause heat
stress in the engine. Always let the engine idle for 3 to 5 minutes before shutting it off.
MACK Trucks, Inc. does not recommend the use of winterfronts, shutters or any other shield in front of the grille or radiator
package under normal circumstances. Today's electronically controlled engines are designed to operate in cold tempera-
tures without a winterfront. These devices, if not used properly, can cause higher exhaust gas temperatures, power loss, ex-
cessive fan usage, failure of the charge-air-cooler (CAC) and a reduction in fuel economy. Winterfronts can be used in the
wintertime during very cold weather if used properly. In these cases, engine coolant and intake air temperatures must also
be carefully monitored and controlled. Please see your authorized MACK Truck dealer for recommended winterfronts.
CAUTION
MACK is now using the ambient air temperature (AAT) sensor for on board diagnostic (OBD) monitoring. If a customer in-
stalls a winterfront or blocks the radiator opening and blocks airflow to the sensor, they will likely set an OBD diagnostic
trouble code (DTC) for inaccurate sensor data due to restricted airflow across the sensor.
Mack Body Builder Instructions
CHU, CXU, GU, TD, MRU, LR
USA139046859
Date 5.2017
Body Builder; Engine, MP7, MP8, and MP10
Page 3 (43)
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