LUBRICATION

Apply a small amount of recommended grease between the release bearing pads and the clutch release fork when lubricating the clutch release bearing.

RELEASE BEARING LUBE TUBE (IF EQUIPPED):

Lube tubes should be pre-lubed before installation. This is to remove air from the lube tube system to ensure lubricant is delivered to the release bearing during initial installation.

Your new MACK truck has been prepared for delivery by your MACK Service Center. After delivery, oil change, filter change, and chassis lubrication intervals become your sole responsibility.

It is important that components be filled with lubricants meeting the specifications as given in “LUBRICANT SPECIFICATIONS” on page 267.

When checking oil levels, the vehicle must be parked on level ground and the units at normal operating temperature. Components must be filled to the correct level. DO NOT OVERFILL.

The oil and filter change intervals outlined in this manual pertain to MACK components. For information concerning oil and oil filter change intervals for vendor components, refer to the specific vendor component service literature.

RELEASE BEARING PADS:

Apply a small amount of recommended grease between the release bearing pads and the clutch release fork when lubricating the clutch release bearing.

RELEASE BEARING LUBE TUBE (IF EQUIPPED):

Lube tubes should be pre-lubed before installation. This is to remove air from the lube tube system to ensure lubricant is delivered to the release bearing during initial installation.

Your new MACK truck has been prepared for delivery by your MACK Service Center. After delivery, oil change, filter change, and chassis lubrication intervals become your sole responsibility.

It is important that components be filled with lubricants meeting the specifications as given in “LUBRICANT SPECIFICATIONS” on page 267.

When checking oil levels, the vehicle must be parked on level ground and the units at normal operating temperature. Components must be filled to the correct level. DO NOT OVERFILL.

The oil and filter change intervals outlined in this manual pertain to MACK components. For information concerning oil and oil filter change intervals for vendor components, refer to the specific vendor component service literature.

Lubrication

Oil and Filter Change — MACK MP Engines

Run the engine until normal operating temperature is reached, then shut off and drain the oil before the engine cools.

Thoroughly clean the area around the filters before removing.

Using tool J 24783, remove the spin-on filters.

Prefill each new oil filter with 1.9 liters (2 quarts) of the recommended engine oil. DO NOT allow any contaminants to enter the filters while prefilling.

Apply a thin film of engine oil to the sealing gasket of the new filters.

Oil and Filter Change — MACK MP Engines

Run the engine until normal operating temperature is reached, then shut off and drain the oil before the engine cools.

Thoroughly clean the area around the filters before removing.

Using tool J 24783, remove the spin-on filters.

Prefill each new oil filter with 1.9 liters (2 quarts) of the recommended engine oil. DO NOT allow any contaminants to enter the filters while prefilling.

Apply a thin film of engine oil to the sealing gasket of the new filters.

Lubrication

Install the filters and tighten an additional 3/4 to 1 turn after the gasket contacts the base.

Fill the engine with the recommended engine oil (refer to “LUBRICANTS AND CAPACITIES” on page 288).

Check oil level and add oil as required.

Install the filters and tighten an additional 3/4 to 1 turn after the gasket contacts the base.

Fill the engine with the recommended engine oil (refer to “LUBRICANTS AND CAPACITIES” on page 288).

Check oil level and add oil as required.

The spin-on oil filters must be pre-filled at installation (refer to “Oil and Filter Change — MACK MP Engines” on page 151).

The spin-on oil filters must be pre-filled at installation (refer to “Oil and Filter Change — MACK MP Engines” on page 151).

Check engine oil level prior to starting the engine. Oil level checks performed immediately after engine shut down will result in an inaccurate dipstick reading.

Start the engine and check for leaks.

Check engine oil level prior to starting the engine. Oil level checks performed immediately after engine shut down will result in an inaccurate dipstick reading.

Start the engine and check for leaks.

Lubrication

Oil Level Check

Check engine oil level with the vehicle parked on level ground. The best time to check oil level is while the engine is COLD (prior to starting at the beginning of the work day, or after the vehicle has sat approximately 2 hours). At normal operating temperature (engine oil temperature above 79.4°C [175°F]), oil level can be checked 15 minutes after shut down.

Oil Level Check

Check engine oil level with the vehicle parked on level ground. The best time to check oil level is while the engine is COLD (prior to starting at the beginning of the work day, or after the vehicle has sat approximately 2 hours). At normal operating temperature (engine oil temperature above 79.4°C [175°F]), oil level can be checked 15 minutes after shut down.

Failure to wait a sufficient amount of time (2 hours if engine oil temperature is below 79.4 °C [175 °F]) or 15 minutes if oil temperature is above 79.4 °C [175 °F]) will result in an inaccurate dipstick reading.

Fill to the correct level. DO NOT OVERFILL.

Oil level must be between the add and full lines on the dipstick as shown in Figure 37.

Failure to wait a sufficient amount of time (2 hours if engine oil temperature is below 79.4 °C [175 °F]) or 15 minutes if oil temperature is above 79.4 °C [175 °F]) will result in an inaccurate dipstick reading.

Fill to the correct level. DO NOT OVERFILL.

Oil level must be between the add and full lines on the dipstick as shown in Figure 37.

Lubrication

Dipstick and oil fill locations are shown in the illustrations below. On conventional cabs, the oil fill tube and dipstick are located on the lefthand side of the engine.

Dipstick and oil fill locations are shown in the illustrations below. On conventional cabs, the oil fill tube and dipstick are located on the lefthand side of the engine.

Power Steering Fluid Change

Beginning December 2005, Mack Trucks, Inc. began phasing DEXRON III into production as the factory fill for the power steering system. Vehicles utilizing DEXRON -type automatic transmission fluid in the power steering system are identified by the label affixed to the power steering reservoir. When adding fluid to the power steering system, always check the label on the side of the reservoir and be sure to use the correct fluid.

Power Steering Fluid Change

Beginning December 2005, Mack Trucks, Inc. began phasing DEXRON III into production as the factory fill for the power steering system. Vehicles utilizing DEXRON -type automatic transmission fluid in the power steering system are identified by the label affixed to the power steering reservoir. When adding fluid to the power steering system, always check the label on the side of the reservoir and be sure to use the correct fluid.

Lubrication

Change the power steering fluid and filter once per year (D inspection interval) for vehicles operating in highway operations, and twice per year (C and D inspection intervals) for chassis operating in vocational operations. Refill the power steering system with the same type of fluid originally used in the system. Refer to the label on the side of the power steering reservoir for the correct fluid. Refer to “STEERING SYSTEM LUBRICANTS AND CAPACITIES” on page 295.

Change the power steering fluid and filter once per year (D inspection interval) for vehicles operating in highway operations, and twice per year (C and D inspection intervals) for chassis operating in vocational operations. Refill the power steering system with the same type of fluid originally used in the system. Refer to the label on the side of the power steering reservoir for the correct fluid. Refer to “STEERING SYSTEM LUBRICANTS AND CAPACITIES” on page 295.

To avoid dirt from entering the steering system after the lines have been disconnected, clean around all fittings and both hose connections at the power steering gear. Also clean around the reservoir cover.

Run the vehicle until the engine reaches normal operating temperature, then shut off the engine.

Disconnect the pressure and return lines at the steering gear and allow the power steering reservoir and hoses to drain into a suitable container.

Jack up the front end of the vehicle so the wheels can be steered manually. Steer several times from left to right steering stops to pump the remaining fluid out of the system.

Replace the steering system filter element. Before reinstalling the element, clean the inside of the reservoir with a clean cloth. Reconnect the pressure and return lines, then refill the reservoir with the recommended fluid. Refer to the label on the side of the reservoir for the correct fluid.

To avoid dirt from entering the steering system after the lines have been disconnected, clean around all fittings and both hose connections at the power steering gear. Also clean around the reservoir cover.

Run the vehicle until the engine reaches normal operating temperature, then shut off the engine.

Disconnect the pressure and return lines at the steering gear and allow the power steering reservoir and hoses to drain into a suitable container.

Jack up the front end of the vehicle so the wheels can be steered manually. Steer several times from left to right steering stops to pump the remaining fluid out of the system.

Replace the steering system filter element. Before reinstalling the element, clean the inside of the reservoir with a clean cloth. Reconnect the pressure and return lines, then refill the reservoir with the recommended fluid. Refer to the label on the side of the reservoir for the correct fluid.

Lubrication

STEERING GEAR BLEED PROCEDURES — TRW 92 SERIES STEERING GEARS

For chassis equipped with TRW 92 series steering gears (i.e., 392, 492, etc.), bleed air from the steering system by lowering the chassis to the ground, starting the engine and steering the wheels several times from left to right steering stops.

Make sure the reservoir does not run dry during the purging operation as air may be drawn into the system.

STEERING GEAR BLEED PROCEDURES — SHEPPARD M90 AND M100 STEERING GEARS

For chassis equipped with Sheppard M90 or M100 steering gears, bleed air from the system as follows:

Beginning approximately August 2002, an auto-bleed feature was incorporated into Sheppard M90 and M100 steering gears. To bleed the air from these steering gears, it is only necessary to start the engine and fully steer the wheels several times from the left to right steering stops. For Sheppard steering gears without the auto-bleed feature, it is VERY IMPORTANT that the steering gear be bled as described in the following procedures. Manual-bleed M90, M100 and M110 steering gears are identified by the bleeder screw located in the steering gear housing, above the pitman arm shaft. Steering gears with the auto-bleed feature will not have a bleeder screw, and can also be identified by the word “Auto” cast into the housing.

STEERING GEAR BLEED PROCEDURES — TRW 92 SERIES STEERING GEARS

For chassis equipped with TRW 92 series steering gears (i.e., 392, 492, etc.), bleed air from the steering system by lowering the chassis to the ground, starting the engine and steering the wheels several times from left to right steering stops.

Make sure the reservoir does not run dry during the purging operation as air may be drawn into the system.

STEERING GEAR BLEED PROCEDURES — SHEPPARD M90 AND M100 STEERING GEARS

For chassis equipped with Sheppard M90 or M100 steering gears, bleed air from the system as follows:

Beginning approximately August 2002, an auto-bleed feature was incorporated into Sheppard M90 and M100 steering gears. To bleed the air from these steering gears, it is only necessary to start the engine and fully steer the wheels several times from the left to right steering stops. For Sheppard steering gears without the auto-bleed feature, it is VERY IMPORTANT that the steering gear be bled as described in the following procedures. Manual-bleed M90, M100 and M110 steering gears are identified by the bleeder screw located in the steering gear housing, above the pitman arm shaft. Steering gears with the auto-bleed feature will not have a bleeder screw, and can also be identified by the word “Auto” cast into the housing.