Requirements And Information On Removing/Mounting Tyres

Information 

• The temperature of the tyres must be approx. 20°C (at least 15°C) during removal/mounting. Always allow enough time to heat the vehicle/tyres in a suitable environment if necessary (at room temperature of more than 15°C). For example: Workshop with room temperature of approx. 20°C and tyre temperature of approx. - 15°C: Warm-up time approx. 3 hours. 
• Before removal/mounting, it is important to establish whether a Tyre Pressure Monitoring (TPM) system is fitted. The tyre valve serves as the distinguishing feature. Without TPM: rubber valve. With TPM: aluminium valve. If a TPM system is fitted, read and follow the special instructions for the Tyre Pressure Monitoring system (see module in this main chapter). 
• Vehicles with TPM: Before changing a tyre, read out the remaining life span of the wheel electronics unit (battery capacity) using the PIWIS Tester. The value you read out gives an indication as to whether or not it needs to be replaced (not a 100% value). If the values are considerably lower than expected for the next tyre change, talk to the customer and determine whether he/she is happy to have the wheel electronics unit(s) replaced at this time. 
• Use only TIP TOP Universal, Order No. 593 0601 (3.5 kg bucket) or Contifix as the removal/mounting paste (sliding compound). Sufficient sliding compound must be used. 
• Make sure there is no significant localised pressure on the wheel (rim) and on the tyre during removal/mounting. If this is not observed, damage will occur that will render a tyre unusable (ready for disposal) and/or require a new rim. 
• Before removal/mounting, check the assembly head (of the mounting machine) for damage (scoring, dirt). The assembly head must be cleaned or replaced if necessary. Otherwise, there is a risk of paint damage and pressure marks on the rim flange. 
• All parts that touch the disc wheel and tyre are made of plastic to prevent damage to paintwork during removal/mounting. The rim flange must be protected with adhesive tape in some cases. The mounting lever may also have to be covered with adhesive tape in order to avoid damaging the area around the spokes (during removal). 
• If you do not have a mounting lever with plastic protection, use a rim flange protector (assembly aid) to prevent it from slipping onto the rim flange. 
• Always check the disc wheel for damage (sealing face between tyre/rim, true running, superficial damage and deformation). 
• If you intend to continue using the tyre, check it for damage (sealing face between tyre/rim, ply breakage, tyre beads, sidewalls and tread depth). 
• The rubber valve must generally be replaced when a tyre change is necessary. In vehicles with TPM (aluminium valve), the valve only needs to be replaced in exceptional cases. This is elaborated further in: "Special information on TPM" (module in this main chapter). 
• When mounting tyres, pay attention to the direction of rotation or the inner and outer sides. 
• When replacing just one tyre on an axle, make sure that the tread depth of the new tyre does not differ from that of the other tyre by more than 30%.