Mack TerraPro LEU 2010, Operator'S Handbook Manual

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54 INSTRUMENTS AND CONTROLS
Panel F
C0029590
34. Air Pressure Gauge 35. Speedometer/Odometer
1. Coolant Temperature Gauge — Indicates the temperature of the engine
coolant. The normal operating temperature for MACK MP7 engine is between
77°C and 107°C (170°F and 225°F). The driver will receive a warning if
coolant temperature reaches 223°F and engine shutdown will occur at 227°F
if the engine coolant temperature shut down option is enabled.
CAUTION
Coolant temperature must NOT exceed 107°C (225°F).
2. Tachometer — Indicates engine speed in revolutions per minute (RPM).
Tachometer readings should be used as a guide for shifting, as well as to
prevent engine damage due to overspeed. The blue band indicates the
optimum range for engine brake operation.
3. Oil Pressure Gauge — Indicates engine oil pressure. The normal
operating oil pressure for a MACK MP7 engine (at governed speed) is
between 275.8 and 620.5 kPa (40 and 90 psi). At idling speed, the oil pressure
should be between 275.8 and 413.9 kPa (40 and 60 psi).
Should the oil pressure drop suddenly from normal readings, stop the engine
immediately and determine the cause.