Cooling System - Draining and Filling
NOTE: Drain, flush, and fill the cooling system at the mileage or time intervals specified in the Maintenance Schedule in this Group. If the solution is dirty, rusty, or contains a considerable amount of sediment; clean and flush with a reliable cooling system cleaner. Care should be taken in disposing of the used engine coolant from your vehicle. Check governmental regulations for disposal of used engine coolant.DRAINING
Without removing radiator pressure cap and with system not under pressure:
Draining Cooling System:
1. Shut engine off and turn draincock counterclockwise to open.
2. The coolant reserve tank should empty first, then remove the pressure cap. (if not, Refer to Testing Cooling System for leaks).
NOTE: First clean system to remove old glycol, see Cooling System Cleaning.
REFILLING
Filling Main System
Fill system using antifreeze described in Coolant section. Fill 50 percent of capacity with 100 percent glycol. Then complete filling system with water. Continue filling system until full, this provides better heater performance. Be careful not to spill coolant on drive belts or the generator.
Filling Reserve System
Fill coolant reserve system to at least the FULL mark with 50/50 solution. It may be necessary to add coolant to the reserve tank after three or four warm up/cool down cycles to maintain coolant level between the FULL and ADD marks; if any trapped air was removed from the system.