SEAL-O-RING 4F7952 - Caterpillar

Engine exhaust contains products of combustion which may be harmful to your health. Always start and operate the engine in a well ventilated area and, if in an enclosed area, vent the exhaust to the outside.
Perform the required daily maintenance and other periodic maintenance before the engine is started. Inspect the engine compartment. This inspection can help prevent major repairs at a later date. Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" for more information.
Before you start the engine, refer to this Operation and Maintenance Manual, "Walk-Around Inspection" .
Before you start the engine, refer to this Operation and Maintenance Manual, "Engine Oil Level - Check" for the procedure to ensure that the oil supply is adequate.
Ensure that the engine has an adequate fuel supply.
Open the fuel supply valve (if equipped).
All valves in the fuel return line must be open before and during engine operation to help prevent high fuel pressure. High fuel pressure may cause filter housing failure or other damage.
If the engine has not been started for several weeks, fuel may have drained from the fuel system. Air may have entered the filter housing. Also, when fuel filters have been changed, some air pockets will be trapped in the engine. In these instances, prime the fuel system. Refer to the Operation and Maintenance Manual, "Fuel System - Prime" for more information on priming the fuel system.
Do not start the engine if there is a "DO NOT OPERATE" warning tag or similar warning tag attached to the start switch.
Do not move any of the controls if there is a "DO NOT OPERATE" warning tag or similar warning tag attached to the controls.
Reset all of the shutoffs or alarm components.
Ensure that any driven equipment has been disengaged. Minimize electrical loads or remove any electrical loads.