Freightliner Trucks Business Class Truck FL70 Bear

WARNING: Inspect the components and check their operation as described below. Failure to perform these inspections and checks could result in separation of worn suspension components and loss of vehicle control resulting in property damage, serious personal injury or death.

Chock the front tires. Raise the rear of the vehicle so the tires just clear the ground and the suspension is fully extended. Place safety stands under the vehicle frame.

Squeeze all air springs to check for complete deflation.

Inspect each air spring for wear at its connection to its pedestal.

Check the axle connection welds (beam-seat to equalizing-beam) and axle-adapter to axle for cracks.

Move the axle up and down while checking for signs of looseness due to worn parts at the front pivot connections.

Inspect the shock absorbers for oil leaks and worn rubber bushings.

Remove the safety stands and lower the rear of the vehicle to the ground. Run the engine until air pressure of at least 100 psi (689 kPa) is maintained throughout the system.

Check that all air springs are inflated.

1. On all front-wheel-drive vehicles, check the oil level in the differential. See Fig. 3.

1.1 Remove the oil level check-and-fill plug, and make sure the oil level is even with the bottom of the bore.

1.2 If needed, add oil until the differential is filled to the bottom of the bore.

1.3 Install the oil level check-and-fill plug, and tighten it firmly.

2. On front-wheel-drive vehicles equipped with MT-17 axles, check the oil level in the hubs.

2.1 The oil drain bore must be at the bottom in order to check the oil level. See Fig. 4.

2.2 Remove the plug from the oil level checking bore, and make sure the oil is level with the bottom edge of the bore.

2.3 If needed, add oil until each axle hub is filled to the bottom of the bore.

2.4 Install the plug in each oil level checking bore, and tighten it firmly.;

1. Drive the vehicle until the axle oil is warmed, then park it, and chock the rear tires.

2. Jack up the front axle until the wheels are off the ground, then secure the axle on jack stands.

3. On vehicles equipped with an MT-11 front axle, drain the oil from the differential.

On vehicles equipped with an MT-17 front axle, drain the oil from the differential and the hubs.

3.1 Remove the oil-drain plug from the differential, and allow the oil to drain. See Fig. 5.

3.2 If applicable, rotate each wheel until the oil drain bore is at the bottom, then remove the drain bore plugs and allow the oil to drain into a suitable container. If needed use a bent piece of sheet metal to direct the draining oil so it doesn’t splash on the tires.

4. Fill the differential and hubs (if applicable) with new oil.

4.1 Install the drain bore plugs in each hub and the differential, then tighten the plugs firmly.

4.2 Remove the plug from the oil level check bore in each hub and from the fill-and-check bore in the differential.

Drain plug or valve at the bottom of the fuel tank opened and all traces of water and sediment have disappeared

Drain plug or valve installed or closed

Fuel cap removed and cleaned with solvent (for vehicles with a screw-on fuel cap)

Fuel cap vent is open (for vehicles with a screw-on fuel cap)

Fuel cap installed (for vehicles with a screw-on fuel cap)

Vent line at the inboard side of the fuel tank is clean and not plugged (for vehicles with a quarter-turn fuel cap)

Sign off on the fuel tank / vent check

Check the reservoirs for moisture

Amount of moisture found in reservoirs

Check the mounting and connecting lines

Tighten the fasteners attaching the air dryer to the vehicle to 28 lbf·ft (38 N·m) for SAE grade 5, 3/8–16 fasteners

Tighten the fasteners attaching the air dryer to the vehicle to 135 lbf·ft (183 N·m) for SAE grade 5, 5/8–11 fasteners

Check all air lines, fittings, and electrical connections for damage, leakage, or looseness

List of damaged or leaking parts

Sign off on the air dryer inspection