Replacing Tire For Front, Rear or Spare Wheel
Replacing Tire For Front, Rear or Spare Wheel
Caution:
Vehicles with navigation system.
When exchanging/replacing tires, or when changing to another tire size, a wheel calibration must be carried out in the navigation system.
For correct mounting of tires, refer to operating instructions supplied with tire mounting machine. Also make sure that the machine is in perfect condition and that the wheel rim and tire are not damaged.
Note:
Approved tires, tire sizes and special equipment.
Models with M-Mobility system
If, after a flat, the tire was filled with the M-Mobility system, it is necessary prior to its removal to drill a hole (approx. 25 mm) through the tire sidewall. Drain sealing fluid through this hole and dispose of the fluid in accordance with local environmental regulations. Clean the disc wheel after removing the tire.
Mounting tires with a mounting machine:
Unscrew valve and deflate tire. Press off bead from rim flange all around on outside and inside using pressing-off horn of machine.
If the tire beads are stuck, first loosen beads at various points of wheel before actually forcing tire off with pressing-off horn.
Apply tire mounting paste between tire and rim flange and force off tire completely.
Push both tire beads completely into rim well until they are loose.
Pull off balance weights on rim and clean rim to remove large pieces of dirt.
Clamp wheel on mounting machine.
Narrow rim shoulder always faces upwards.
Swing or fold mounting pillar into position and let it engage.
Adjust mounting head, whereby it must be pressed on the rim edge fully and turn down the lever for the clamp; normally the distance of the mounting head will set in automatically.
Valve should be about 10 cm to the right of the mounting head.
Raise tire bead with tire iron over mounting finger.
Note:
To avoid damage, it is recommended to use coated or shrink-fit hose-covered tire irons for light alloy rims.
Let mounting machine run back a short distance (counterclockwise) so that tire bead can slide fully onto mounting finger.
Then let mounting machine run forward (clockwise) a short distance.
In so doing, always check whether bottom bead is fully in well and tire is given enough time to move.
If the bead clamps, stop the machine and let it run back slightly.
If the upper bead is pulled off the rim, also lift the bottom bead over the mounting finger with the tire iron.
Let machine run back a short distance again and then forward (clockwise) briefly until there is complete separation of the tire from the rim.
Release lock and tilt back or swing away mounting pillar.
Unclamp and clean rim.
Replace valve.
Coat rim flange and tire beads with mounting paste.
Clamp rim on mounting machine.
Slide on tire with lower bead partially over rim flange.
Valve is 10 cm to the right of mounting head.
Swing or tilt mounting pillar into position and lock.
Check adjustment of mounting finger, readjusting if necessary, and clamp.
Press tire under mounting finger by hand.
Tyre bead should seat in rollers next to mounting finger.
Let mounting machine run forward (clockwise) a short distance.
Lower tire bead will drop into well.
Press upper tire bead underneath mounting finger. Tire bead should seat in rollers next to mounting finger.
Caution:
Do not pinch or damage bead.
Run mounting machine forward (clockwise) a short distance, while checking that lower tire bead remains in well.
After mounting, first release clamps and then inflate tire (without valve).
Increase pressure up to 3.3 bar (330 kPa) in steps (jumping pressure).
If the tire bead does not slide onto rim edge all around, do not increase pressure. Instead, tire must be deflated and tire bead pressed off; then coat rim flange with mounting paste again and inflate again up to 3.3 bar. If beads bear perfectly on rim shoulders, increase pressure to maximum 4.0 bar in order to "seat" tire.
Screw in valve and correct tire pressure.