LOCKNUT 2149121 - Caterpillar

If the engine will not be started for several weeks, the lubricating oil will drain from the cylinder walls and from the piston rings. Rust can form on the cylinder liner surface, which will increase engine wear which can reduce engine service life.To help prevent excessive engine wear, use the following guidelines:
Complete all of the lubrication recommendations that are listed in this Operation and Maintenance Manual, "Maintenance Interval Schedule" (Maintenance Section).
If freezing temperatures are expected, check the cooling system for adequate protection against freezing. Refer to this Operation and Maintenance Manual, "Fluid Recommendations" (Maintenance Section).If an engine is out of operation and if use of the engine is not planned, special precautions should be made. If the engine will be stored for more than 1 month, a complete protection procedure is recommended.Your Cat dealer will have instructions for preparing the engine for extended storage periods.For more detailed information on engine storage, refer to Special Instruction, SEHS9031, "Storage Procedure for Caterpillar Products".Generator Storage
For information on generator storage, refer to this Operation and Maintenance Manual, "Generator Set Installation" (Operation Section).