Mack Engine Information; Precautions And Warnings - Mack Granite GU Series Operator's Handbook Manual

MACK ENGINE INFORMATION

For engine starting procedures, refer to "STARTING THE VEHICLE", page
169.

Precautions and Warnings

CAUTION
If a winterfront is needed, use only a winterfront that was designed for this specific
chassis. Winterfronts are not recommended, but may be used during very cold
weather with sustained temperatures below -25°C (-13°F).
CAUTION
Be sure to avoid high intake/exhaust temperatures when using winterfronts under
normal operating conditions (above freezing). The restriction of airflow can cause
higher exhaust temperatures, power loss, excessive fan usage and reduced fuel
economy.
CAUTION
If a winterfront is used, a MACK-approved exhaust pyrometer must be installed and
closely monitored while the engine is in operation. Do NOT exceed the maximum
temperature indicated by the red line on the gauge. To reduce exhaust temperature,
downshift or reduce engine power and open the winterfront.
CAUTION
Do not permit a heavy load to drive the engine above the governed speed. Operate
in a gear low enough to allow the engine to accelerate to (or maintain) governed
speed when applying the throttle.
OPERATION 139