OPERA TION New V ehicle Break-In

T o ensure many years reliable, trouble - free operation, the following breakprocedures are recommended:

Note: Oil filter change and chassis lubrication are longer required the 3,000 - mile vehicle break -

Refer the preventive maintenance schedules outlined the Maintenance and Lubrication Manual for recommended lubrication change intervals for the following items:

• Gear oils (transmission, rear axle carrier[s], front drive axle carrier , transfer case, flywheel

• Engine oil

• Oil filters

• Fuel filters

• Coolant conditioner

Note: important that components filled with lubricants meeting the specifications given the Maintenance and Lubrication Manual (21394653)

Note: When checking oil levels, the vehicle must parked level ground, and the units normal operating Components must filled the correct NOT

Note: Oil and filter change intervals this manual pertain components built Mack T For information concerning oil and oil filter change intervals for vendor components, refer the specific vendor component service literature.

During the First 5000 Kilometers (3000 Miles)

• After the first 200 (125 miles), retorque the wheel nuts using accurately calibrated torque wrench. Recheck this torque again after 800 (500 miles).

• Check oil and coolant levels frequently

• Check brake and clutch adjustments per recommended maintenance schedule, and adjust needed.

• Observe the instruments and shut down the engine the first sign any abnormal https://www.truck-manuals.net/mack/

• Report all leaks, loose fasteners, unusual noises, etc., the service representative the nearest Mack dealership they can checked and corrected.

• Check the spring clip torque - (On REYCO also check equalizer nut

After the First 5000 Kilometers (3000 Miles)

Before 6400 Kilometers (4000 Miles) Before 3 4 Months

• Retorque the spring clipbolts). (On REYCO suspensions, also retorque the equalizer nut.)

the First A Inspection Interval

• Check front and rear axle alignment and adjust the alignment out

• Check steering knuckle axle beam clearance.

Although this quality - built vehicle has been lubricated and adjusted the MACK T rucks Assembly occasional air , oil coolant leak may Quick action correct these minor items will prevent a major repair later T ake the vehicle the nearest MACK service center soon any abnormal condition becomes

Initial V alve Adjustment Intervals

Refer the Maintenance and Lubrication Manual

(21394653) for detailed information concerning the Initial V alve Adjustment Interval also see page 223.