Notes on Removing/Mounting Tires
Notes on removing/mounting tiresNote:
^ Before fitting, it should be established whether a tire pressure monitoring system (RDK) is present! The tire valve serves as the distinguishing characteristic. Without RDK - rubber valve, with RDK - aluminum valve. If an RDK is present, observe the special notes for the tire pressure monitoring system. ->44 ' - see section on Special notes for tire pressure monitoring system (RDK)
^ The mounting machine described here is particularly suitable for large tire combinations, such as on the Cayenne.
^ The fitting machine must be modified for 20-inch tires! Information on this subject should be taken from the Workshop Equipment Manual.
^ All parts in contact with the wheel and the tires are made of plastic.
^ No large point load for wheel and tires.
Tools
A - Holding-down device 9539 - For holding down tire bead, see Workshop Equipment Manual, Chapter Special Tools
B - Assembly aid - commercially available; refer to Workshop Equipment Manual, Chapter 2.5
C - Adhesive weight remover - commercially available
D - Mounting lever - commercially available
Notes on removing/mounting tires
Note:
^ When fitting tires, the direction of rotation and the inner and outer sides should be noted.
^ Use only TIP TOP Universal, order No. 593 0601 (3.5 kg bucket) or Contifix as the mounting paste.
^ Ensure that no damage (scoring, soiling) is caused to the assembly head of the fitting machine during fitting. Such damage may result in paint damage and pressure marks on the rim flange.
^ Avoid slipping on to the rim flange. Use rim flange protection (assembly aid) -B- .
- Adhesive tape can be used to protect the rim flange in individual cases, in order to prevent any paint damage during fitting. The mounting lever can also be covered with adhesive tape in order to avoid damaging the area around the spokes during removal.
- The valve must always be replaced when changing attire.
- Check the wheel for damage.
Special notes for tire pressure monitoring system (RDK)
Note:
^ If the previous wheels are still in the vicinity after assembly work (for example changing winter tires and/or wheels from another vehicle with RDK), they might still be recognized by the system. If one or more of these wheels has a minimum pressure of more than 0.4 bar below the required pressure, this can trigger a warning in the instrument cluster. In this case, remove the other wheels or use the Porsche System Tester to tune the vehicle to be outside the radio range of these wheels.
^ The remaining life span can be read out with the Porsche System Tester. Where a tire change is about to be made, it is advisable to read out the remaining life span of the wheel electronics (based on the battery capacity) - see Rep.-Gr. 03 Wheel electronics: read out battery service life.
^ For vehicles with a tire pressure monitoring system, the valve and wheel electronics -A- are only replaced in exceptional cases. The following points can make replacement necessary.
The valve must be replaced if:
^ The wheel electronics are removed
^ The self-locking fastening screw is loose
^ The union nut is loose
^ The valve leaks at valve seat
^ And the valve body is bent or broken.
The wheel electronics must be replaced if:
^ The housing is visibly deformed
^ The filter surface is so soiled that it cannot be cleaned by wiping
^ Tire sealant (tire sealing liquid) has been used.
1. Install wheel electronics loosely at valve (do not tighten) and position in valve bore together with valve and bead seat sealing ring.
ATTENTION: Remove assembly pin after fitting valve.
^ Otherwise the tire will be damaged during installation.
-> Carry out the tightening procedure to the specified torque for the valve in the rim once only.
2. Fit washer, chamfered on both sides, and screw on union nut until it seats. Visibly twist bore at valve foot. If necessary, block with suitable assembly pin. The tightening torque is 3 ft. lbs. (± 0.4 ft. lbs.).
3. Push wheel electronics -A- slightly into rim well (this adjusts the angle of inclination of valve to wheel electronics).
4. Carefully tighten self-locking (Torx) fastening screw T 20 with tightening torque 3 ft. lbs. (± 0.4 ft. lbs.). The wheel electronics should now be lying evenly against the rim.
Removal
1. Clamp wheel.
2. When pushing off the tire, ensure that the bead press-off tool is set to the exact inch graduation. If this is not the case, the rim flange may be damaged by the press-off rollers.
3. The wheel must be turned anti-clockwise when pressing the tire off the rim. Otherwise, excessive forces occur on the fastening bolts of the machine which can lead to bolt breakage. The tire beads can be pressed off at the same time or individually.
4. Before removing the tire, coat the tire beads with mounting paste to facilitate removal.
Note:
^ The mounting lever must be kept at a safe distance from the rim. This prevents damage (scratches, pressure marks) to the rim spokes.
^ In the case of vehicles with RDK, for the upper tire bead the mounting head must be positioned about 15 cm behind the valve in order to prevent damage to the wheel electronics.
^ In the case of vehicles with RDK, for the lower tire bead the mounting head must be positioned about 5 cm behind the valve.
5. Put the assembly head on the rim flange. Position the assembly aid. The mounting lever is pushed into the deep bed underneath the first tire bead, and then guided over the assembly shoe and pushed down .
6. Lift the tire bead out of the rim bed by turning the wheel to the right.
7. Position the assembly aid for the second tire bead approximately 5 - 10 cm to the right of the valve. Pull the tire upwards and push it into the rim bed underneath the second tire bead using the mounting lever. Make sure that the mounting lever is guided correctly (see Item 5). Turn the wheel to the right and remove the tire.
Installation
ATTENTION: High tire seating pressure. (Max. 4 bar! This value must not be exceeded.)
^ Personal injury may occur in the event of tire or wheel damage (due to the coincidence of several unfavorable factors).
-> The tire must therefore be filled in the filling cage. Tire filling cage
Note:
^ Check the mounting head adjustment (must correspond with rim size).
^ The mounting machine must be modified for 20-inch tires. Information on this subject should be taken from the Workshop Equipment Manual.
^ The wheel electronics must not be treated with compressed air, mounting paste, cleaning agents or any other solvents.
^ Rims must not be cleaned with high pressure before tires have been fitted.
^ Do not scratch filter surface of wheel electronics clear! Remove soiling with a lint-free cloth.
1. Free the wheel from the abraded rubber particles and check for damage .
2. A new valve must always befitted.
3. Coat the wheel and tire with tire mounting paste - TIP TOP Universal, order No. 593 0601 - or Contifix.
4. Place the tire in the correct position on the wheel. Push in mounting arm and position on top of the rim flange. The assembly head must be offset from valve by 180°.
5. Push the first part of tire bead (lower tire bead) partly over rim flange. Adjust mounting head on rim flange and pull lower tire bead onto the rim.
Note: During fitting, ensure that the tire bead is not pressed against the wheel electronics.
6. Position mounting head approximately 15 cm to the right of valve and pull the second tire bead (upper tire bead) onto rim .
7. Remove entire wheel from tire fitting unit. Without valve insert, fill tire with air in the tire filling cage until tire beads slide over hump (to a maximum of 4.0 bar).
8. Screw in new valve insert and fill tire to specified tire pressure. Screw on valve cap.