36 12 005 Replacing A Runflat Tire or A UHP Tire
36 12 005 Replacing A Runflat Tire Or A UHP Tire
NOTE:
UHP tyre = Ultra High Performance tyre
UHP tyres are tyres with an aspect ratio (H:B) ≤ 45 % or tyres with a speed index ≥"V"
NOTE:
Follow the tyre fitting machine manufacturer's operating instructions.
It is absolutely essential to ensure that the equipment is in proper working condition and that there is no damage to the disc wheel and tyre.
Balance wheels after completing work.
IMPORTANT:
Only tyre fitting machines which are approved for fitting run-flat and UHP tyres may be used.
Please refer to the operating instructions of the respective tyre fitting machine for details of the exact fitting procedure.
Use only BMW-approved plastic-covered mounting levers.
Use only BMW-approved tyre-fitting paste.
For approved wheel and tyre combinations, tyre makes and optional equipment, refer to KSD CD.
NOTE:
Pay attention to different tyre markings:
- Item (1) Marking denoting BMW-approved tyres. Ensure that only BMW-approved tyres are fitted.
- Item (2) RSC is the abbreviation for Run-flat System Component (run-flat tyres).
- Item (3) Outside. The tyre must be fitted so that the wording Outside is always situated on the outside of the rim.
IMPORTANT:
Many tyres are directional.
The arrow on the tyre must point in the "Forward" direction of rotation.
IMPORTANT:
Before removal:
- Observe tyre temperature of min. +15 °C. Refer to Recommendation for heating.
- Clean wheel/tyre unit
- Remove valve insert (deflate tyre)
- Remove fitted balancing weights
Removal - upper bead:
Unseat bead if possible with unseating roller (1) from rim flange.
Note position of sensor - do not unseat in this area.
If using a pressing-off tool (2), unseat 3 to 4 times around circumference max. 1 cm from rim flange.
Observe pressing-off/unseating limitation.
Start at 90° or 270°.
Do not position at 0° or 180° Refer to following Fig. no. 3601-81.
Apply sufficient lubricant as deeply as possible between wheel rim and tyre.
Position mounting head (1) in direction of rotation before valve (2).
Position hold-down device at 0×to hold tyre in well.
Position tyre iron (3) on fitting head.
Lever bead with mounting lever (1) over rim flange.
IMPORTANT:
Avoid damaging the wheel rim by using a suitable mounting lever with protective coating.
Make sure there is sufficient lubrication between bead and rim flange; apply lubricant if necessary.
Allow tyre fitting machine to rotate slowly and relieve tension on hold-down device and rollers during rotation.
Removal - lower tyre bead:
IMPORTANT: Apply sufficient lubricant between wheel rim and tyre.
Position mounting head (1) in direction of rotation before sensor (2).
Position mounting lever (3) on mounting head (1).
Tire bead must be positioned entirely in well opposite mounting head (1).
Lever bead with mounting lever (1) over rim flange.
IMPORTANT: Avoid damaging the wheel rim by using a suitable mounting lever with protective coating.
Allow fitting machine to rotate slowly.
Observe before installation:
- Observe tyre temperature of min. +15 °C. Refer to Recommendation for heating
- Clean wheel/tyre
- Check wheel rim for burrs, wear and other damage
- Clean tyre beads and check for evidence of damage
- Check RDC sensor for damage
- Replace tyre valve
Before installation:
IMPORTANT: Apply lubricant to inside of upper bead (1) and to outside of upper and lower tyre sidewall (2) up to upper decorative line.
Apply lubricant over entire well area.
Lever sensor spare.
Mounting lower tyre bead:
Grip wheel and lay on tyre.
IMPORTANT: Apply a light coating of antiseize compound to fitting head.
Position fitting head (1) as pictured.
IMPORTANT:
Make sure tyre is correctly positioned on fitting head. Position bead in relation to fitting head (1) in accordance with equipment manufacturer's instructions.
Position sensor (RDC) (3) and valve min. 10-15 cm before traction point/catching point (2).
Sensor must not be subjected to load.
Allow fitting machine to rotate slowly.
Guide tyre in direction of rotation and press towards well.
Mounting upper bead:
Position sensor (1) in relation to mounting head (2) as pictured.
IMPORTANT:
Make sure tyre is correctly positioned on fitting head. Position bead in relation to fitting head (2) in accordance with equipment manufacturer's instructions.
Position sensor (RDC) (1) and valve min. 10-15 cm before traction point/catching point.
Sensor must not be subjected to load.
Coat bead holding-down element (3) with lubricant and insert.
Allow tyre fitting machine to rotate slowly.
Insert additional bead holding-down elements (1) to hold the bead in the wheel drop centre.
The last part of the bead should jump over the rim flange in the sensor area.
IMPORTANT:
Perform fitting in stages, take short breaks and relieve tension.
Avoid heavy deformations at the traction point.
Do not squash belt edge and side walls through hold-down devices.
Never use a tyre iron as a holding-down element.
Filling/inflating tyre:
Remove all fitting aids.
Observe national/country-specific regulations.
Observe national/country-specific regulations.
- Increase pressure up to 3.3 bar in stages (fitting pressure).
- If the tyre bead does not slip fully past the rim edge all round, do not under any circumstance increase the pressure.
- If necessary, release air and force off tyre bead again.
- Coat rim flange and tyre again with tyre-fitting paste.
- Inflate tyre again up to 3.3 bar.
- When tyre beads are resting perfectly on rim shoulders, increase inflation pressure to max. 4.0 bar (settling pressure) to "settle" the tyre.
Screw in valve insert and correct tyre pressure.
Observe notes/instruction on initializing the Run Flat Indicator (RPA) or RDC (USA=TPM).
IMPORTANT:
Advise the customer to avoid heavy acceleration and heavy braking in the initial period.
The assembly paste can cause the tyre to turn on the wheel rim and give rise to imbalance.