SEBU7899-05 85 Maintenance Section Engine Storage Procedure - Check i01458399 Engine Storage Procedure - Check i04242309 Engine Valve Lash - Check SMCS Code: 1000-535 SMCS Code: 1105-535 The initial valve lash adjustment on new engines, rebuilt engines, or remanufactured engines is recommended at the first scheduled oil change. The adjustment is necessary due to the initial wear of the valve train components and to the seating of the valve train components. The oil change interval may be extended to 12 months for a vehicle that is operated seasonally and placed in storage for the remainder of the year by using the required storage procedures and the required start-up procedures.
This extension is permitted if the following categories for oil change intervals in the Operation and Maintenance Manual, “Maintenance Interval Schedule” have not been reached: The maintenance is recommended by Caterpillar as part of a lubrication and preventive maintenance schedule to help provide maximum engine life. Mileage Note: Only qualified service personnel should perform this maintenance. For procedures on adjusting the valve lash and adjusting the valve bridge, see System Systems Operation/Testing and Adjusting, “Engine Valve Lash - Inspect/Adjust”. Consult your Cat dealer for assistance.
Operating hours Fuel consumption 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 three months, a complete protection procedure is recommended. For more detailed information on engine storage, see Special Instruction, SEHS9031, “Storage Procedure For Caterpillar Products”. Ensure that the engine can not be started while this maintenance is being performed. To help pre- vent possible injury, do not use the starting motor to turn the flywheel. 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. Rust on the cylinder liner surface will cause increased engine wear and a reduction in engine service life. Caterpillar recommends the use of volatile corrosion inhibitor (VCI) oil in order to prevent internal engine damage due to moisture during storage. These inhibitors in the VCI oil act by evaporating inside the engine. The inhibitors then condense over the inside surfaces of the engine. The evaporation process and the condensing process offers full protection to surfaces that cannot be reached with preservatives. 0.9 L (1.0 qt) of 4C-6792 VCI oil will treat 28.4 L (30.0 qt) of engine oil. This will give a 3 percent concentration of VCI oil.
The engine must be completely sealed when the engine is stored in order for the VCI oil to function properly. The VCI oil is easily cleaned from the engine when you remove the engine from storage. The volatile vapors are removed by simply running the engine to operating temperature. A mineral oil base is left behind after the volatile vapors are removed. Hot engine components can cause burns. Allow additional time for the engine to cool before mea- suring/adjusting valve lash clearance. i01597115 Engine Valve Rotators - Inspect SMCS Code:
1109-040 When inspecting the valve rotators, protective glasses or face shield and protective clothing must be worn, to help prevent being burned by hot oil or spray. Engine valve rotators rotate the valves when the engine runs. This helps to prevent deposits from building up on the valves and the valve seats. Perform the following steps after the engine valve lash is set, but before the valve covers are installed: 1. Start the engine according to Operation and Maintenance Manual, “Engine Starting” (Operation Section) for the procedure.