36 12 001 Replacing a tire

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Fig 1: View Of Tire Fitting Machine

Courtesy of BMW OF NORTH AMERICA, INC.

For correct tire mounting procedure, refer to operating instructions for the tire fitting machine. Additionally make sure that the machine is in satisfactory working order and the rim edge and tire are not damaged.

Vehicles With M-Mobility System

If the tire was filled with the aid of the M-mobility system after a puncture, it will be necessary before removal to drill a hole (approx. 25 mm) in the side wall of the tire. Allow the sealing fluid to flow out of this hole and dispose of it in an environmentally responsible manner. Clean the disc wheel after removing the tire.

To remove tire with tire fitting machine: Unscrew valve and deflate tire. Press tire bead on outside and inside from bead seat with tire horn. If the tire bead will not detach, first release the bead at individual points and then detach from rim edge with tire horn. Press both tire beads fully into the rim well until they release.

Remove balance weights from rim and clean rim to remove coarse dirt.

Coat tire beading with mounting paste. Clamp rim on tire fitting machine.

The narrow bead seat must always face upwards.

Fig 2: Identifying Tire Horn

Courtesy of BMW OF NORTH AMERICA, INC.

Swing or fold mounting pillar into position and let it engage. Adjust mounting head, press fully into rim edge and press down lever for clamp; the distance of the mounting head is normally set automatically.

The valve must be positioned about 10 cm to the right of the mounting head.

Use tire bar to raise tire bead over mounting finger.

NOTE: To avoid damage, plastic coated or shrink-sleeve coated tire bars should be used for light alloy rims.

Fig 3: Using Tire Bar For Raising Tire Bead Over Mounting Finger

Courtesy of BMW OF NORTH AMERICA, INC.

Let fitting machine run back a short distance (counterclockwise); tire bead will slip fully onto mounting finger. Now allow fitting machine to run a forward for a short distance (clockwise).

While doing so, always make sure that the lower bead is fitted fully in the rim well and the tire rests correctly.

If the bead becomes stuck, stop the machine and run back for a short distance.

Fig 4: Running Fitting Machine Clockwise And Counterclockwise

Courtesy of BMW OF NORTH AMERICA, INC.

If the upper bead was pulled from the rim, the lower rim must also be lifted over the mounting finger with the aid of a tire bar.

Let machine run back a short distance and then forward (clockwise) until the tire separates completely from the rim.

Fig 5: Lifting Lower Bead Over Mounting Finger

Courtesy of BMW OF NORTH AMERICA, INC.

Release lock and tilt back or swing away mounting pillar.

Unclamp and clean rim. Replace valve.

Coat bead seat and tire beading with mounting paste.

Clamp rim on tire fitting machine. Fit tire while pushing lower bead partly over the bead seat.

The valve is positioned about 10 cm to the right of the mounting head.

Fig 6: Installing Tire On Rim

Courtesy of BMW OF NORTH AMERICA, INC.

Swing or tilt mounting pillar into position and lock.

Check alignment of mounting finger, correct and tension as required.

Press tire under mounting finger by hand. The tire bead should fit in rollers next to mounting finger.

Allow fitting machine to run a forward for a short distance (clockwise).

The lower tire bead now slips into the rim well.

Fig 7: View Of Tire Bead In Rollers

Courtesy of BMW OF NORTH AMERICA, INC.

Press upper tire bead under mounting finger. The tire bead should fit in rollers next to mounting finger.

IMPORTANT: Do not pinch or damage bead. Operate fitting machine forwards in stages (clockwise); while doing so, make sure the lower tire bead remains in the rim well.

Fig 8: Pressing Upper Tire Bead Under Mounting Finger

Courtesy of BMW OF NORTH AMERICA, INC.

After fitting, first release the clamps and then inflate the tire with air (without valve).

Increase pressure up to 3.3 bar (330 kPa) in steps. Do not increase the tire pressure if the tire beading does not slip into the rim well over its entire circumference. In this case, the tire bead must be pressed off and the air let out of the tire.

Recoat bead seat with mounting paste and inflate tire to 3.3 bar. When the beading rests correctly on the bead seats increase the pressure to 4.0 bar so that the tire "fits snugly".

Screw in valve and correct tire pressure.

Fig 9: View Of Clamps On Tire

Courtesy of BMW OF NORTH AMERICA, INC.