https://www.truck-manuals.net/mack/ MAINTENANCE AND LUBRICATION 225 MAINTENANCE INTRODUCTION Preventive maintenance is vital to the life of your new vehicle. This section of the Operator’s Handbook covers items of importance concerning the proper care of MACK vehicles. A well-run maintenance and lubrication program is the best way to ensure a long life of productive operation. The operator plays an important role in the proper care of this equipment. By performing daily checks and observing the equipment while in operation, minor defects can be caught and corrected before they become major problems. Make sure any problems are corrected before putting the equipment into operation. If you have any questions concerning the proper care, maintenance and lubrication of your vehicle, or if you need help in developing a preventive maintenance program, contact the service manager at the local MACK Sales, Parts and Service Center. Note: This handbook contains basic maintenance information. For complete maintenance and lubrication procedures, refer to the Maintenance and Lubrication Manual .
TURBOCHARGER The engine turbocharger operates at very high speed, temperatures and pressure. Turbo bearing lubrication is critical, particularly for a newly installed turbo or one which has not been operated for a period of time and all oil has drained from the bearing and shaft surfaces. To avoid turbocharger bearing failure, the following instructions are recommended: • Start the engine at least every 30 days to ensure turbo bearing lubrication. Operate engine at low idle for at least three minutes before increasing RPM or driving the vehicle. • If the engine has not been run for more than 30 days, turbo pre-lube procedure is necessary: 1. Remove turbo air intake duct and oil line connection at turbo. 2. Fill oil inlet fitting to overflow with clean engine oil. 3. Using fingers at compressor wheel, carefully spin and wiggle the turbo shaft to distribute the oil over all bearing surfaces. 4. Reconnect air intake duct and again fill turbo oil port to overflow, connect oil line and start engine. 5. Operate engine at low idle for at least three minutes before increasing RPM or driving the vehicle.
