Need-Release Filters (Non-Oat Systems); Dropout - Detroit Diesel 50 Series Operator's Manual

HOW-TO SECTION
Need-Release Coolant Filters
(Non-OAT Systems)
Spin-on coolant filters are available for
Detroit Diesel engines. Membranes
in the filters release SCAs before
the coolant approaches a corrosive
condition, protecting the engine from
corrosion. The elements release the
SCA charge as needed, as opposed to
the maintenance SCA elements, which
instantaneously release the SCA
charge. Coolant filter elements should
be replaced after one (1) year, 120,000
miles (192,000 km) or 2,000 operating
hours, whichever comes first.

Dropout

Excessive amounts of some inhibitors
in the coolant can cause a gel or
crystalline deposit that reduces heat
transfer and coolant flow. The deposit,
called "dropout," takes the color of
the coolant when wet, but appears as a
white or gray powder when dry. It can
pick up solid particles in the coolant
and become gritty, causing excessive
wear of water pump seals and other
cooling system components.
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6SE550 0401 Copyright © 2004 DETROIT DIESEL CORPORATION
To avoid injury when using
caustic cleaning agents, follow
the chemical manufacturers
usage, disposal, and safety
instructions.
The wet gel can be removed by using
a non-acid (alkali) type heavy-duty
cleaner, such as Detroit Diesel Power
Cool On-Line Cleaner (sodium
nitrite/sodium tetraborate). Part
numbers are listed in Table 45.
NOTE:
If the gel is allowed to dry, it is
necessary to disassemble the
engine and clean it with a caustic
solution or physically clean individual
components.
All information subject to change without notice. (Rev. 01/ 04)