Operating the Engine
· Do not operate the engine at full throttle below peak torque engine speed (1100 to 1600 RPM,
dependent on engine rating) for extended periods (more than 1 minute) of time.
· Allow the engine to idle 3 to 5 minutes before shutting it off after a full load operation.
Continuous operation with low coolant temperature (below 60°C [140°F] or high
coolant temperature (above 100°C [212°F]) can damage the engine.
· Monitor the oil pressure and coolant temperature gauges frequently. Refer to Lubricating Oil System or
Cooling System, Section V, for recommended operating pressures and temperatures. Shut off the
engine if any pressure or temperature does not meet the specifications.
· If an overheating condition starts to occur, reduce the power output of the engine by releasing the
throttle pressure or shifting the transmission to a lower gear, or both, until the temperature returns to
normal operating range. If engine temperature does not return to normal, shut off the engine and refer
to Troubleshooting, Section T, or contact an Authorized Repair Location.
· Most failures give an early warning. Look and listen for changes in performance, sound, or engine
appearance that can indicate service or engine repair is needed. Some changes to look for are as
Loss of power
Unusual engine noises
An increase in oil consumption
Fuel, oil, or coolant leaks
An increase in fuel consumption
Sudden changes in engine operating
temperature or oil pressure