Demounting Wheels With Low Profile, Uhp Or Run Flat Tyres; Preliminary Checks - Nussbaum TC 110 PRO Manual De Instrucciones

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10) Depress pedal (5, Fig. H) to release the wheel from the table top.
N.B. Demounting and mounting are always done with the table top rotating clockwise.
Anticlockwise rotation is used only to correct operator errors or if the table top stalls.
11.5 DEMOUNTING WHEELS WITH LOW PROFILE, UHP OR RUN FLAT TYRES
Nussbaum has developed this procedure to provide operators in the sector with correct working procedures for UHP
and reinforced side run-flat tyres.
Thorough studies have revealed that an incorrect working procedure causes often irreparable damage to tyres during
mounting and demounting, putting the safety of the vehicle itself at risk.
Low-profile tyres are tyres having a ratio between their height (H) and cross-section width (C) of less than 1; e.g. the
60 low-profile series has a H/C ratio of 0.6.
Ultra High Performance (UHP) tyres have a height-width ratio of 45% or less, and a velocity index of V or above.
Run-Flat tyres are tyres which still allow the vehicle to travel for a specified distance at a specified speed, which varies from
constructor to constructor, even if no longer pressurised. This is achieved by using a different rubber blend and a reinforced
structure, which enable the shoulder of the tyre to support the weight of the car even when the pressure inside it has fallen to
zero, allowing the vehicle's driver to reach the nearest service centre in safety.
At present, there are two different types of run-flat tyres on the market: the reinforced sidewall type, also known as self-
supporting tyres, and the type with an internal support may be made from plastic (Pax-System) or metal (Support-Ring).
These tyres' characteristics make mounting operations more problematical, and it is extremely important not to cause
damage during mounting and demounting operations, as this
may reduce the vehicle's safety level.
The TC 110 PRO tyre changer can safely operate on the run-flat
self supporting tyres with reinforced sidewalls also known as self
supporting, but not on those with internal support.
The mounting and demounting procedure is the same for both self-
supporting run-flat, and low profile and UHP tyres.
WARNING: It is essential to follow the instructions
closely to avoid irreparable damage to the tyre,
which might put the vehicle's safety at risk.
WARNING: Figs. P1 and P2 show the points with the highest risk of
damage during demounting (P1) and mounting (P2):
these are the traction points where the tyre is very taut against the
edge of the rim.

PRELIMINARY CHECKS

Comply with work-place safety regulations.
All operators must have suitable clothing, gloves, safety footwear, etc.
The tyre and rim must be cleaned thoroughly.
Identify the parts correctly: both the tyre and the rim.
Rims have their diameter, width, Hump number, etc. data stamped on
their surfaces.
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P1
P2
TC 110 PRO