PACCAR 579, 567 — Engine is Overheating

EMERGENCY - Engine is Overheating manual for instructions on transmission shifting and parking brake information. hands, and arms against escaping flu- id and steam by covering the cap with a large, thick rag. DO NOT try to re- move it until the surge tank cools down or if you see any steam or coolant es- caping. In any situation, remove the cap very slowly and carefully. Be ready to back off if any steam or coolant be- gins to escape. NOTE The system may also temporarily over- heat during severe operating condi- tions such as: Climbing a hill on a hot day. Stopping after high-speed/ high- load driving. Debris blocking air flow through the cooling module (radiator).

WARNING 2 To reduce the chance of personal in- jury, vehicle damage and/or death from overheated engines, which can result in a fire, never leave the engine idling without an alert driver present. If the engine should overheat, as indicat- ed by the engine coolant temperature light, immediate action is required to correct the condition. Continued unat- tended operation of the engine, even for a short time, may result in serious engine damage or a fire. Failure to comply may result in death, personal injury, equipment or property damage.

If the engine coolant temperature warning lamp comes on and the audible alarm sounds showing an overheat condition, or if you have any other reason to suspect the engine may be overheating, DO NOT TURN OFF THE ENGINE unless a low water warning device indicates a loss of coolant. Follow these steps: Follow these steps if the engine coolant temperature is rising, or the temperature is already above normal, and there are no other warning alarms displayed in the instrument cluster. 1. Reduce engine speed, or stop. When stopped, place the transmission in neutral (N) and set the parking brake. Keep the engine running.

See the vehicle operator's WARNING Removing the fill cap on a hot engine can cause scalding coolant to spray out and burn you badly. If the engine has been in operation within the previ- ous 30 minutes, be very careful in re- moving the fill cap. Protect face, Y53-6047-2HEN (03/18) 43 NOTE Keep the engine running at idle speed unless a warning icon turns on and re- quires an engine to be shut off.