BUSHING 3232465 - Caterpillar

Caterpillar 3600 Series Heavy Fuel Engines are designed to use heavy fuels for starting, operating, and stopping. These engines can also operate on distillate fuel. Also, these engines may be operated on distillate fuel when the supply of heavy fuel is restricted, reduced, or eliminated. During the changeover between fuels, these engines can use a mixture of distillate fuel and heavy fuel oil.Use caution not to change between heavy fuel and distillate fuel too quickly. Differences in the control of the fuel temperature can cause thermal shock and a lack of lubricity to the unit injectors.The following recommendations are based on having a system that meets Caterpillar recommendations and industry standards. The design of the system includes these features:
A three-way valve for the selection of heavy fuel or distillate fuel
A separate isolated distillate fuel supply for the engine and/or enginesCircumstances for Changing the Fuel
Caterpillar 3600 Series Heavy Fuel Engines are designed to use heavy fuels for normal operation. However, it is preferable to operate with distillate fuel before stopping the engine for the following circumstances:
Performance of service on fuel system components such as fuel filters and unit injectors
The engine is shut down for an undetermined period of time without circulation of the fuel through the engine.The following definitions will assist operators in determining the circumstances for changing the fuel:General recommendation - Flush the engine fuel system with distillate fuel prior to performing any maintenance on the fuel system. Flush the fuel system with distillate fuel if the engine is shut down for more than 12 hours. If the jacket water heaters are not functional, flush the fuel system with distillate fuel after every engine shut down.Temporary shutdown - The engine is shut down for 12 hours or less. It is not necessary to change the fuel. The engine can be stopped and started with heavy fuel. Jacket water heaters must be operated in order to maintain the temperature of the jacket water at a minimum of 65 °C (149 °F). Continue to circulate heavy fuel through the engine in order to maintain the temperatures of fuel system components for start-up. The fuel must have the correct viscosity and temperature at all times.Extended shutdown - The engine is shut down for more than 12 hours or for an unknown length of time. Flush the engine fuel system with distillate fuel. Unless cold ambient conditions make the use of jacket water heaters necessary, use of jacket water heaters is not required. Shut off the circulation through the fuel system and the module for cooling the unit injector tips. Purge the pressurized air from the air lines and from the starting motor. Lock the air valves to the starting motor in the OFF position. Space heaters for the generator must be operational.Recommendations for Shutdown and Start-up
The use of proper operating practices is important. The following guidelines are recommended:
For generator sets, operate the space heaters when the generator is not operating. This will help to prevent moisture damage to windings. The space