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SERIES 50 OPERATOR'S GUIDE
ENGINES WITH FUEL PRO FILTERS ........................................ 95
HOW TO SELECT COOLANT ......................................................... 96
DEFINITIONS .............................................................................. 96
ANTIFREEZE .......................................................................... 96
COOLANT ............................................................................... 96
DROP-OUT ............................................................................. 96
FULLY FORMULATED ANTIFREEZE ..................................... 96
INITIAL–FILL COOLANT ......................................................... 96
OAT .......................................................................................... 96
SCA ......................................................................................... 96
APPROVED COOLANTS ............................................................ 97
EG OR PG & WATER + SCA INHIBITOR ............................... 98
MIXING EG OR PG ANTIFREEZE AND WATER .................... 98
RECYCLED ANTIFREEZE .................................................... 100
EG OR PG & WATER + OAT INHIBITOR ................................ 100
WATER ONLY + SCA OR WATER ONLY + OAT INHIBITOR . 101
WATER REQUIREMENTS ..................................................... 102
COOLANTS NOT RECOMMENDED ........................................... 102
ALL ANTIFREEZES AND COOLANTS CONTAINING
PHOSPHATE ........................................................................... 102
AUTOMOTIVE TYPE COOLANTS .......................................... 102
METHYL ALCOHOL-BASED ANTIFREEZE ........................... 103
METHOXY PROPANOL-BASED ANTIFREEZE ...................... 103
GLYCOL-BASED COOLANTS FORMULATED FOR HVAC .... 103
ADDITIVES NOT RECOMMENDED ........................................... 103
SOLUBLE OIL ADDITIVES ..................................................... 103
CHROMATE ADDITIVES ........................................................ 103
COOLANT MAINTENANCE ........................................................ 103
COOLANT INHIBITOR TEST INTERVALS ............................ 103
SUPPLEMENTAL ADDITIVES ................................................ 104
COOLANT MAINTENANCE INTERVALS ............................... 105
SCA TEST PROCEDURES ......................................................... 107
NEED-RELEASE FILTERS (NON-OAT SYSTEMS) .................... 108
DROPOUT ................................................................................... 108
EXTENDER ADDITIVE FOR OAT COOLANT ............................. 109
OAT COOLANT DRAIN INTERVAL ......................................... 109
CHRONIC COOLANT SYSTEM PROBLEMS ............................. 109
MAINTENANCE PRODUCTS ..................................................... 109
All information subject to change without notice.
(Rev. 01/ 04)
vii
6SE550 0401
Copyright © 2004 DETROIT DIESEL CORPORATION