ENGINE MAINTENANCE - Maintenance Procedures Coolant/Antifreeze Condition Maintenance checks for ensuring proper coolant\anti-freeze condition. WARNING careful in removing the radiator cap. Protect face, hands, and arms against escaping fluid and steam by covering the cap with a large, thick rag. Failure to comply may result in death, person- al injury, equipment or property dam- age 2 DO NOT loosen any fuel line fittings in order to bleed the fuel system of air. The system is under high pressure which, when relieved, could cause death, personal injury, equipment or property damage. Perform these maintenance procedures according to the Preventative Maintenance Schedule.
NOTE Cooling System Important information on replacing coolant filters. WARNING Test the engine coolant at least twice per year to determine if the coolant must be replaced. If it is determined that the coolant should be replaced, make sure to flush the coolant system. Contact a PACCAR authorized repair location for flushing the coolant sys- tem. Handle coolant and antifreeze careful- ly. Ethylene glycol antifreeze is poison- ous. Store in original fluid container only, and always keep out of the reach of children. Never remove the filler cap (vertically mounted) on the surge tank while the engine is still hot. Wait until the coolant temperature is below 120°F (50°C).
Scalding steam and flu- id under pressure may escape and cause serious personal injuries. The pressure cap (horizontally mounted) on the surge tank should never be opened. Failure to comply may result in death, personal injury, equipment or property damage. Your engine may be equipped with a coolant filter designed to capture and remove harmful deposits from the cooling system to help prolong system life. Refer to the Preventative Maintenance Schedule for the recommended coolant filter change service interval. 1. Check the following anti-freeze conditions: WARNING Freeze point Coolant level pH level Nitrite level Carboxylate level Do not remove the surge tank fill cap on a hot engine.
It can cause scalding coolant to spray out and you could be burned. If the engine has been operat- ed within the last 30 minutes, be very 64 Y53-1166-1G1 (08/2018)