CAB AR 4820126 - Caterpillar

Do not overfill the crankcase. Engine damage can result.
Note: This machine is equipped with both an automated function for checking fluid levels and a dipstick. Refer to Operation and Maintenance Manual, "Monitoring System" regarding the automated system. If the machine is on an incline or the engine has been stopped only for a short time, then the engine oil does not return to the crankcase and the fluid level cannot be properly checked by either method. Park the machine on level ground and check the oil level after the engine has been stopped for at least 30 minutes.Check the oil level while the engine is stopped. Do not check the oil level while the engine is running.
Open the engine hood.
Illustration 1 g00811399
Remove the dipstick. Wipe the oil off the dipstick and reinsert the dipstick.
Illustration 2 g00101479
Remove the dipstick and check the dipstick. The oil level should be between the "FULL" mark and the "ADD" mark.
Do not fill above the "FULL" mark on the dipstick.If the oil level is above the "FULL" Mark, the crankshaft might dip into the oil during engine operation. This will lead to excessively high oil temperatures. High oil temperatures can reduce the lubricating characteristics of oil.
Illustration 3 g00811405Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on Containing Fluid Spillage.
Remove the oil filler plug in order to add oil, if necessary. See Operation and Maintenance Manual, "Lubricant Viscosities". Note: If the oil is deteriorated or badly contaminated, change the oil regardless of the maintenance interval.
Clean the oil filler plug. Install the oil filler plug.
Close the engine hood.