MBE 900 OPERATOR'S GUIDE Dropout form of "reprocessing" which consists only of mechanical purification. Excessive amounts of some corrosion inhibitors can cause a gel or crystalline deposit that reduces both heat transfer and coolant flow. This deposit is called "dropout." Cold Weather Products Special precautions must be taken during cold weather. To protect your engine, take the following special measures in cold weather: Dropout takes the color of the coolant when wet, but becomes a white or gray powder when dry. It can pick up solid particles in the coolant and become gritty. It will cause premature wear of the coolant pump seals and other components of the cooling system.
Use special cold weather fuel and engine oil. Check the concentration of antifreeze in your coolant. The wet gel can be removed using an alkaline (non-acid) cleaner containing either sodium nitrite or sodium tetraborate. Take special care of your batteries. Winter-Grade Diesel Fuel At low outside temperatures, paraffin may separate from the diesel and affect its ability to flow freely. If the gel is allowed to dry, it is necessary to disassemble the engine and clean it with a caustic solution, or physically clean the individual components.
Avoid breakdowns caused by this problem (for example, blocked filters) by using cold-resistant winter-grade diesel fuel with improved low-temperature flow characteristics. In most cases, winter-grade fuel can be used without problems at cold outside temperatures. Disposal Coolants are biologically degradable substances. When disposing of used coolant, comply with local legal requirements and waste water regulations. If using summer-grade fuel or a less cold-resistant winter grade, a flow improver or kerosene can be added with caution. The amount needed depends on the outside temperature. Consult the local water supply authorities to determine the best method of disposal.
A modern engine coolant has complex tasks to perform. Do not allow any All information subject to change without notice. (Rev. 04/08) 61 DDC-SVC-MAN-0055 04/08 Copyright © 2008 DETROIT DIESEL CORPORATION