Requirements And Information On Removing/Mounting Tires

Tire temperature during removal/mounting must be approx. 20 °C (at least 15 °C). Allow enough time to heat the vehicle/tires in a suitable environment if necessary (at room temperature of more than 15 °C). Example: If the room temperature of the workshop is approx. 20 °C and the tire temperature is approx. - 15 °C, approx. 3 hours are required to heat the tires to the required temperature .
Before removal/mounting, it is important to establish whether a Tire Pressure Monitoring system (TPM) is fitted! The tire valve serves as the distinguishing feature. Without TPM: rubber valve. With TPM: aluminium valve. If a TPM system is fitted, read the special information on the Tire Pressure Monitoring system .
Vehicles with TPM: Before changing a tire, 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 tire 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). Use sufficient sliding compound .
No large point load for wheel (rim) and tire during removal/mounting. If this is not observed, damage will occur that will render a tire unusable (ready for disposal) and/or require a new rim .
Before removal/mounting, check the mounting head (of the mounting machine) for damage (scoring, soiling). Clean the mounting head if necessary, or replace it. A dirty or damaged mounting head can cause paint damage and pressure points on the rim flange .
All parts that touch the disc wheel and tire are made of plastic to prevent damage to paintwork during removal/mounting. Protect the rim flange with adhesive tape if necessary. The mounting lever can also 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) and avoid letting it slip on to the rim flange .
Check the disc wheel for damage (sealing face between tire/rim, true running, superficial damage and deformation) .
If you intend to continue using the tire, check it for damage (sealing face between tire/rim, ply damage, tire beads, sidewalls and tread depth) .
The rubber valve must generally be replaced when a tire change is necessary. In vehicles with TPM (aluminium valve), the valve only needs to be replaced in exceptional cases. .
When mounting tires, pay particular attention to the direction of rotation and the inside/outside .
When replacing only one tire on an axle, make sure that the tread depth of the new tire does not differ from that of the other tire by more than 30 %! Ideally: Replace both tires on an axle so that vehicle handling is not unnecessarily affected by different tread depths .
If only one tire is replaced on an axle, check vehicle handling during the final test drive. Also replace the second tire if necessary, following consultation with the customer. Processing (recommendation): If the customer does not agree to having both tires replaced, prepare a memo about this and get the customer to sign it .
Always bear in mind that new tires only attain their full potential after a certain run-in period .