User Manual

SERIES 50 OPERATOR'S GUIDE
Need-Release Coolant Filters
(Non-OAT Systems)
Spin-on coolant filters are available for
Detroit Diesel engines. Membranes
in the fi lters release SCAs before
the coolant approaches a corrosive
condition, protecting the engin e 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, whichev e r comes first.
Dropout
Excessive amounts of so me 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
whiteorgraypowderwhendry.Itcan
pick up solid particles in the coolant
and become gritty, causing excessive
wear of water pump seals and other
cooling system components.
PERSONAL INJURY
To avoid injur y when usi ng
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 Po wer
Cool On-Line Cleaner (sodium
nitrite/sodiu m tet raborate). Part
numbers are listed in Table 45.
NOTE:
Ifthegelisallowedtodry,itis
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) 109
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION