Freightliner Trucks Business Class Truck FL112

Park the vehicle on level ground. Apply the parking brakes, and chock the tires.

U-bolt nuts torque between 400 to 450 lbf·ft?

Spring hanger bolts torque (lbf·ft)

Spring hanger bolts torque is 190 lbf·ft?

5/8-inch torque rod clamp nuts torque (lbf·ft)

5/8-inch torque rod clamp nuts torque between 125 to 150 lbf·ft?

End-nuts for each torque rod torque (lbf·ft)

End-nuts for each torque rod torque between 400 to 450 lbf·ft?

Remove the dipstick, 3/8–16 hexnut, and cover

Drain the power steering reservoir by disconnecting the power steering gear-to-reservoir hose from the reservoir

Catch the fluid from the reservoir in a drain bucket, then cap the reservoir port

Lift out the spring and filter element

Thoroughly clean the reservoir with a lint-free cloth

Install a new filter element, and position the spring on top of the filter element

Fill the reservoir with approved power steering fluid

WARNING: Fill only with approved clean fluid. Do not mix fluid types. Any mixture or any unapproved fluid could lead to seal deterioration and leaks. Fluid leakage could cause loss of power steering assist

IMPORTANT: Do not start the engine while draining the system

1. Apply the parking brakes and chock the tires.

2. Make sure the refrigerant compressor drive belt is not damaged, and is correctly tensioned. Also check the tightness of the compressor mounting fasteners. For instructions and torque values, see Group 01 of the Business Class® Trucks

3. Using a feeler gauge, check for correct clutch clearance. For instructions, see Group 83 in the Business Class® Trucks Service Manual.

4. Inspect the compressor clutch coil wire. Check the connector for damage or looseness. Replace the wire if it is damaged.

5. Check for broken, burst, or cut hoses. Also check for loose fittings on all parts.

WARNING: Wear eye protection when using compressed air or high-pressure water to clean parts, as permanent harm to eyes could result from flying debris.

6. Check for a build-up of road debris on the condenser fins. Using a whiskbroom and air pressure, or a spray of soapy water, carefully clean off the condenser; be careful not to bend the fins.

Warning: This procedure requires trained personnel with PPE!

If pressure is below 80 psi, restart the engine to pressurize the system

Road grime cleaned off the relay valve

Debris cleaned from the valve exhaust port

No air leakage around the fittings or exhaust port

If there is leakage, tighten the fittings using two wrenches to avoid twisting the tubing

Valve passes the check and is not damaged

Warning: This procedure requires trained personnel with PPE!

Note: For off-highway operations, retorque the frame fasteners the first 1000 miles (1600 km), then periodically, depending on the operating conditions.

Caution: Continued vehicle operation with insufficiently tightened fasteners could result in bracket or frame damage.

Front frame brackets torqued correctly

Suspension brackets torqued correctly

Spring brackets torqued correctly

Fuel tank supports torqued correctly

Exhaust supports torqued correctly

Engine supports torqued correctly