CAT 3412C - Full Load Operation

• Cold engines consume excess fuel. Utilize heat
from the jacket water system and the exhaust
system, when possible. Keep cooling system
components clean and keep cooling system
components in good repair. Never operate the
engine without water temperature regulators. All of
these items will help maintain operating
temperatures.
• Settings for the fuel system and the limits for the
operating altitude are stamped on the Engine
Information Plate. If an engine is moved to a
higher altitude, the settings must be changed by a
Caterpillar dealer. Changing the settings will help
prevent damage to the turbocharger. Changing
the settings will help to provide the maximum
efficiency for the engine. Engines can be operated
safely at higher altitudes, but the engines will
deliver less horsepower. The fuel settings should
be changed by a Caterpillar dealer in order to
obtain the rated horsepower.
i00651421
Full Load Operation
SMCS Code: 1000
Applying the Load
1. While the engine is operating at full load, check
that the gauges are in the normal range. Always
increase the engine speed to the rated speed
before applying the load.
2. Adjust the voltage and the frequency.
3. Close the main circuit breaker.
4. Apply the load. Begin operating the engine at low
load. Check the gauges and the equipment for
proper operation. After normal oil pressure is
reached and the temperature gauge begins to
move, the engine may be operated at full load.
Adjust the voltage and the frequency in order to
compensate for the load, if necessary.
The governor will adjust the engine speed if the load
varies, or if the load is cyclic, as required.
Extended operation at low idle or extended operation
at a reduced load may cause increased oil
consumption and carbon buildup in the cylinders.
Carbon buildup in the cylinders can result in loss of
power and/or poor performance. When the engine is
operated at a reduced load, operate the engine at a
full load in order to remove carbon buildup from the
cylinders. Operate the engine at a full load at every
four hours. Check the gauges and check the
equipment frequently while the engine is under a
load.
SEBU7125-13
89
Operation Section
Full Load Operation