Wheel change

Warning!

Switch off the voltage and switch off the battery master switch before changing wheels on the tag axle.

Never go under a vehicle which is only lifted by a jack. To obtain maximum safety when working under a raised vehicle, both the chassis and moving axle suspensions must be secured from falling. There is a great risk of personal injury by crushing.

Never go under an air-suspended vehicle that is not completely secured from falling in case there is a pressure change in the air bellows. There is a great risk of personal injury by crushing.

Removal

1. Engage a low gear and turn the key to the locked position. Place the drive mode selector in the neutral position for automatic gearbox.

Warning!

You must chock the vehicle’s wheels to prevent the vehicle from moving while working.

2. Chock in front of and behind the wheels that are to remain on the ground.

3. Release the parking brake for the wheel to be changed to ensure that wheel and brake drum lay against the hub when tightening.

4. Mark the rim’s position to the hub.

5. Slacken the wheel nuts without removing them.

6. Raise the vehicle.

 

Warning!

Make sure the jack stands firmly on level ground.

IMPORTANT!

Only position the jack at the specified lifting points. Placing in another position may cause serious damage to the vehicle.

7. Remove the wheel nuts and the wheel.

IMPORTANT!

Check-tighten the wheel nuts to 650 Nm after driving approx. 100 km.

Chock in front of and behind the wheels that are to remain on the ground.

Marking the rim’s position against the hub.

Fitting

1. Thoroughly clean the contact surfaces. Use a wire brush.
There are spacing rings on some rims. Also clean these.

NOTE!

Thick layers of paint, rust and dirt may cause the wheel nuts to come loose and the bolt holes in the rims and the brake drum to become oval.

2. Clean the threads of the wheel bolts.

NOTE!

Check that the parking brake is released for the axle being worked on.

3. Refit the wheel in the same position it had before removal. Check the marking.

4. Tighten the wheel nuts in the correct tightening sequence as shown in the illustration. Never use a nut runner of the flywheel type. The nuts must be torque tightened to 650 Nm.

IMPORTANT!

A Scania workshop must tighten the wheel nuts to the correct torque. A torque that is too high or low may cause the wheel to come loose or the brake drum to become oval.

5. Lower the vehicle and remove the wheel chocks.

Parts that must be cleaned before fitting

Tightening sequence for tightening the wheel nuts

Scania recommends drawing a line over the wheel studs and wheel nuts to detect any deviations more easily. Use a marker pen. If a wheel nut deviates, remove the wheel nut completely and refit it again.

IMPORTANT!

Check-tighten the wheel nuts to 650 Nm after driving approx. 100 km.