Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 114

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928
Wheels. Tires. Allrrnment
44
General assembly information,
tires
Always use new rubber valves when replacing tires.
Attention: When flttlng tires, always comply with any Instructions
on the slde walls wlth regard
to dlrection of rotatlon or side-specific
assembly (e.g. arrow or "outer/Inner")
When fitting tubeless tires, check that the sealing areas of the tire and the disk wheel are clean and
look for any damage. With regard to this, always bear in mind that a tubeless tire is sealed by the
bead base. If the side wall of the bead were used for sealing, it would be possible for air to escape
under extreme driving conditions.
Check the rim flange of light alloy disk wheels for wear (see Page 44 - 6).
When fitting the tire beads into place, use only the tire assembly compounds specified below. If an
unsuitable assembly compound Is used, the following may occur: Tire may rotate on the wheel,
bead core may break during fitting and the rim surface may be damaged by aggressive substances.
Caution: Use only TIP TOP Universal, Order No. 593 0601 (3.5 kgs can) or Contifix as tire assem-
bly compound.
If COntlflx IS used, coat beads sparingly (to avoid tire rotation on the wheel rim) and avoid driving
the car for 24 hours after tire fitting or matching if possible.
Tell your clients to avoid extreme driving behavior (acceleration, braking) during the first 60 to
120 miles wtih new or newly fitted tires to prevent the tire twisting on the rim under driving conditions.
Mark the tires if necessary.
A maximum of 20 mm twisting of the tire on the rim must be regarded as the ultimate limit value, The
best result of the wheel balancing in such cases is usually only moderate. This will have a detrimental
affect on an optimally balanced wheel.
General assembly lnformatlon, tlres
Printed in Germany - XXXI. 1993
44 - 7

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1986 9281985 928928

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