B-MAX 2012 – Wheels and Tires – Wheel and Tire – Disassembly and Assembly

Wheels and Tires - Wheel and TireB-MAX 2012.75 (01/2012-)
Disassembly and Assembly

Special Tool(s) / General Equipment

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204-823
Torque Screw Driver, TPMS Sensor

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204-836
Installer, Tire Pressure Monitoring System Sensor (TPMS)
Wooden Block

Disassembly

NOTICE:

caution Failure to follow the instructions below may result in damage to the null (tire pressure monitoring system).

caution The null sensor is mounted to the valve stem. Removal of the valve stem requires dismounting the tire from the wheel and removal of the null sensor.

NOTE: Use only the Digital Tire Pressure Gauge any time tire pressures are measured to be sure that accurate values are obtained.

  1. Refer to: Wheel and Tire (204-04A, Removal and Installation).
  1. cautionNOTICE: The valve stem is connected to the null sensor. Do not pull the valve stem from the wheel, or damage to the sensor will occur.

    NOTE: If a new null sensor is being installed, remove and discard the valve stem-to-sensor screw and the sensor.

    Remove the valve stem core and fully deflate all air from the tire.
  1. NOTICE:

    caution Do not allow the tire beads to move beyond the wheel mid-plane (middle of the wheel) when separating the beads from the wheels, damage to the null sensor may occur.

    caution Tire and valve stem position is critical to prevent damage to thenull sensor when using a paddle-type bead separator.

    NOTE: Some machines may have a nylon roller bead separator at the 12 o'clock position instead of the paddle-type bead separator at the 3 o'clock position.

    • For a paddle-type tire machine, position the valve stem at the 12 o'clock or 6 o'clock position and the paddle at the 3 o'clock position.
    • For a roller-type tire machine, align the valve stem with the roller at any position.

    NOTE: Paddle type shown, roller type similar.

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  1. NOTE: Index-mark the valve stem and wheel weight positions on the tire.

    Place the wheel and tire assembly on the turntable of the tire machine with the valve stem at the 11:30 position and the machine arm at the 12 o'clock position and dismount the outer bead from the wheel.

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  1. Reset the wheel and tire assembly on the turntable of the tire machine with the valve stem at the 11:30 position and the machine arm at the 12 o'clock position and dismount the inner bead from the wheel.
  1. NOTE: A new valve stem must be installed whenever a new tire or wheel is installed.

    Discard the specified component. Follow local disposal regulations.

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NOTE: This step is only valid for vehicles with TPMS Snap-In Sensors.

  1. cautionNOTICE: Use care not to damage the wheel surface when removing the valve stem.

    Discard the specified component. Follow local disposal regulations.
    Use the General Equipment: Wooden Block

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NOTE: This step is only valid for vehicles with TPMS Bolt-On Sensors.

  1. Discard the specified component. Follow local disposal regulations.

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Assembly

NOTE: When installing a new wheel, always install a new valve stem and sensor screw. Reuse thenull sensor from the previous wheel if possible. The null will not have to be trained if the sensor is reused.

NOTE: If the null sensor is being reused, inspect the null sensor for damage and install a new sensor as necessary.

NOTE: This step is only valid for vehicles with TPMS Snap-In Sensors.

  1. cautionNOTICE: To prevent null sensor and valve stem damage, the valve stem must be installed onto thenull sensor and then installed into the wheel as an assembly.

    Use Special Service Tool: 204-823.
    Torque: 1.5 Nm

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NOTE: This step is only valid for vehicles with TPMS Snap-In Sensors.

  1. cautionNOTICE: Lubricate the valve stem with soapy water and install it with the listed special tool.

    Use Special Service Tool: 204-836.

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NOTE: This step is only valid for vehicles with TPMS Snap-In Sensors.

  1. NOTICE:

    caution It is important to pull the valve stem and null sensor assembly through the wheel rim hole in a direction parallel to the valve stem hole axis. If the assembly is pulled through at an angle, damage to the valve stem and sensor assembly may occur.

    caution Use care not to damage the wheel surface when installing the valve stem and null sensor assembly.

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NOTE: This step is only valid for vehicles with TPMS Bolt-On Sensors.

  1. cautionNOTICE: To prevent null sensor and valve stem damage, the valve stem must be installed onto thenull sensor and then installed into the wheel as an assembly.

    Use Special Service Tool: 204-823.
    Torque: 1.5 Nm

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NOTE: This step is only valid for vehicles with TPMS Bolt-On Sensors.

  1. cautionNOTICE: Use care not to damage the wheel surface when installing the valve stem and null sensor assembly.

    Torque: 8 Nm

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cautionNOTICE: Damage to the null sensor may result if the tire mounting is not carried out as instructed.

  1. NOTE: Lubricate the tire beads using a suitable fast-drying, corrosion-inhibiting tire bead lubricant.

    NOTE: Do not mount the tire at this time.

    Position the wheel on the turntable of the tire machine, then lubricate and position the bottom bead of the tire on the wheel.
  1. Position the wheel to align the valve stem with the machine arm, at the 6 o'clock position, and mount the bottom bead of the tire.

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  1. Reposition the wheel to align the valve stem with the machine arm at the 6 o'clock position, and mount the top bead of the tire.
  1. NOTE: Use only the Digital Tire Pressure Gauge any time tire pressures are measured to be sure that accurate values are obtained.

    Inflate the tire to the pressure specified on the null (vehicle certification) label located on the driver door or door pillar.

NOTE: Proceed to the next step if the tire beads do not seat at the specified inflation pressure.

  1. warningWARNING: If there is a need to exceed the maximum pressure indicated on the sidewall of the tire in order to seat the beads, follow all steps listed below. Failure to follow these steps may result in serious personal injury.

    cautionNOTICE: The following steps should only be carried out if the tire beads cannot be seated by inflating the tire up to the maximum inflation pressure listed on the tire sidewall.

    1. Relubricate the tire bead and wheel bead seat area.
    1. Install a remote valve and pressure gauge.
    1. Wear eye and ear protection and stand at a minimum of 3.65 m (12 ft) away from the wheel and tire assembly.
    1. Inflate the tire using the remote valve and tire gauge until the beads have seated or until the pressure gauge is 138 kPa (20 psi) more than maximum inflation pressure on tire sidewall. If beads have not seated, deflate the tire and proceed to the next step.
    1. Place the wheel and tire assembly in an OSHA-approved tire safety cage.
    1. Inflate the tire using the remote valve and pressure gauge until the beads have seated or until the pressure gauge is 276 kPa (40 psi) more than maximum inflation pressure on the tire sidewall. Do not exceed 276 kPa (40 psi) above the maximum pressure on tire sidewall. Install a new tire if the beads do not seat at this pressure.
  1. NOTE: The TPMS has to be reset after every manual change to the tires or the tire pressure (wheel change or pressure adjustment).

    Refer to: Wheel and Tire (204-04A, Removal and Installation).
  1. NOTE: The BCM cannot recognize that the sensor identifiers have been moved to different positions and will retain the original position information for each sensor. Perform the Tire Pressure Monitoring System (TPMS) Sensor Location Calibration if the tire position was changed.

    Refer to: Tire Pressure Monitoring System (TPMS) Sensor Location Calibration (204-04B Tire Pressure Monitoring System (TPMS), General Procedures).

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