HARNESS AS-WIRING 3N4431 - Caterpillar

Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.
Excessive additive (greater than the recommended 6% initial fill) together with concentrations of antifreeze greater than 60% cause deposits to form and can result in radiator tube blockage and overheating.
Open the engine access door on the left side of the machine.
Illustration 1 g03744164
(1) Full mark
(2) Add mark
Maintain the coolant level between the ADD and the FULL marks on the overflow tank when the cooling system is cool. Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.
If additional coolant is necessary, remove the cap on the overflow tank and add the appropriate coolant mixture. If you need to add coolant daily, check the cooling system for leaks.
Install the cap for the overflow tank.
Close the engine compartment.