Procedure For Large Wheels (Over 21") - Nussbaum TC 450 Manual De Instrucciones

WARNING:
The operating pressure of the tyre changer and PT must be between 8 and 10 bar.
If it is lower and the procedures are not carried out exactly as described, there may be problems with the rim
slipping on the chuck.
To solve this problem, during mounting of the second bead, make sure that the entire section of tyre between the
fixed and rotary arms of the PT is correctly positioned inside the well of the rim.
It is also essential to emphasise that excessive pressure in this stage may also cause slipping problems, so keep the
working arms of the PT at the correct height.
WARNING:
When using the bead pressing disc, never apply excessive pressure, and never press hard enough to cause
deformation of the tread surface.
11- Keep turning until the second bead is completely mounted, checking that the edge guard remains in place in the traction point.
N.B.: The PT has a mechanical system which automatically gradually reduces the pressure applied by the bead pressing disc as it rotates, to
prevent damage to the tyre.
12- Raise the PT arms, remove the fixed bead pressing arm and move the PT and the vertical post to the retracted position.
13- Release the rim from the tyre changer and perform tyre bead insertion and inflation, complying with all the relevant regulations.
If you are working on Run Flat, UHP or low profile tyres mounted on large wheels, the procedure for mounting the second bead is slightly
different and is as follows:
After mounting the first bead in the normal way:
1- Place the valve at approximately 6 o'clock.
2- Place the PT arm in a working position with the bead breaker disc on its end stroke.
3- Fit the extra fixed arm (BPT) on the PT.
4- Adjust the position of the bead pressing disc according to the rim diameter.
5- Using the knob, adjust the distance between the disc and the head; this distance must
be reduced to a minimum.
6- Place the edge guard at approximately 5 o'clock in line with the traction point.
7- Lower the PT arms until the tyre bead is placed at the same height as the well.
8- Fit the large MPG clamp near the fixed arm (see Fig. R/1).
9- Start turning the turntable and at the same time manually accompany the moving arm
as it rotates making sure that the plastic guard protecting the bead remains in line with
the traction point (see Fig. R/2).
10- Continue turning until the second bead has been completely mounted.
TC 450 - Liga C 270

10.5 PROCEDURE FOR LARGE WHEELS (OVER 21")

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ENGLISH • Instructions manual
R/1
R/2