Fuels, Lubricants, and Coolant/Flush and Service Cooling System FLUSH AND SERVICE COOLING SYSTEM TS281 -UN-23AUG88 02 12 N CAUTION: Explosive release of fluids from pressurized cooling system can cause serious burns. 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 ® RESTORE™. Follow the instructions provided with the cleaner. Refill cooling system with the appropriate coolant solution. See ENGINE COOLANT SPECIFICATIONS, earlier in this group. 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 system when system is refilled. Follow procedure given in your operator’s manual. IMPORTANT: NEVER overfill the system. A pressurized system needs space for heat expansion without overflowing at the top of the radiator. Coolant level should be at bottom of radiator filler neck. The ethylene glycol base (antifreeze) can become depleted of SCA’s 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 within 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. After adding new coolant solution, run engine until it reaches operating temperature. This mixes the coolant solution uniformly and circulates it through the entire system. After running engine, check coolant level and entire cooling system for leaks. Contact your authorized servicing dealer or engine distributor, if there are further questions.
NOTE: Refer to your operator’s manual for a specific service interval. FLEETGUARD ® is a registered trademark of Cummins Engine Company. RESTORE™ is a trademark of FLEETGUARD ® . CTM42 (24MAR95) 02-12 6076 Diesel Engines—S.N. (500000— ) RG,COOL,REQ8B -19-17AUG94 160101 PN=31