FLUSH AND SERVICE COOLING SYSTEM
CAUTION: Explosive release of fluids from
pressurized cooling system can cause serious
Shut off engine. Only remove filler cap when
cool enough to touch with bare hands. Slowly
loosen cap to first stop to relieve pressure
before removing cap completely.
IMPORTANT: Air must be expelled from cooling
Service Cooling System Safely
system when system is refilled. Follow
procedure given in your operator's
The ethylene glycol base (antifreeze) can become
depleted of SCAs allowing various acids to form that will
damage engine components. In addition, heavy metals,
such as lead, copper and zinc, accumulate in the ethylene
glycol base. The heavy metals come from corrosion that
occurs to some degree with in a cooling system. When a
coolant is saturated to the point where it can no longer
hold heavy metals and other dissolved solids, they settle
out and act as abrasives on engine parts.
NOTE: Refer to your operator's manual for a specific
Flush cooling system and replace thermostats as
described in your operator's manual. Clean cooling
system with clean water and TY15979 John Deere
Heavy-Duty Cooling System Cleaner or an equivalent
cleaner such as FLEETGUARD® RESTORETM
RESTORETM or RESTORE PLUSTM. Follow the
instructions provided with the cleaner. Refill cooling
system with the appropriate coolant solution. See ENGINE
COOLANT SPECIFICATIONS, earlier in this group.
FLEETGUARD is trademark of Cummins Engine Company, Inc.
RESTORE is a trademark of Fleetguard Inc.
Restore Plus is a trademark of Fleetguard Inc.
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