ENGINE OPERATION - Operating Instructions before shutdown. This will allow circulating coolant and lubricating oil to carry heat away from the cylinder head, valves, pistons, cylinder liners, turbocharger, and bearings. This way you can prevent engine damage that may result from uneven cooling. Electromagnetic Interference 1 CAUTION Information on electromagnetic interference (EMI). DO NOT idle the engine for excessive- ly long periods. Long periods of idling, more than 10 minutes, can cause poor engine performance.
If not installed correctly, some vehicle accessories (CB radios, mobile transmitters, etc.) can generate and use radio frequency energy that may cause electromagnetic interference (EMI) between the accessory and the electronically controlled fuel system. Under these conditions, PACCAR is not liable for any performance problems with either the fuel system or the accessory. EMI is not considered by PACCAR to be an engine failure and therefore is not warrantable. NOTE Following these guidelines will help reduce engine wear during idling and the frequency of DPF regenerations.
For engines equipped with an elec- tronic control module (ECM), ensure the ignition switch is turned OFF for a minimum of 100 seconds prior to dis- connecting the continuous (unswitch- ed) battery power supply. If the un- switched battery power supply is dis- connected in less than 100 seconds after the ignition switch is turned OFF, active fault codes and incorrect ECM information may occur. Engine Shutdown Prevent engine damage by following these shutdown precautions. System EMI Susceptibility NOTE PACCAR products are designed and tested for minimum sensitivity to incoming electromagnetic energy.
The fuel system EMI susceptibility has been designed with a high tolerance against EMI and in most normal circumstances, if not all, electromagnetic energy-emitting devices that meet the Federal Communications Commission legal requirements should cause no interference. DO NOT shut off the engine immedi- ately. A hot engine stores a great amount of heat and it does not cool down immediately after it is shut off. Always cool the engine down before shutting it off. You will greatly increase its service life. CAUTION Failure to follow the correct shutdown procedure may result in damage to the turbocharger and shorten the turbo- charger life. Idle the engine at 1,000 rpm for four minutes.
Then low idle for 30 seconds Y53-1185-1E1 (04/16/18) 27