Extraordinary" Mounting Procedure; Correct Procedure For Demounting/Mounting Run Flat Tyres Fitted With Valve Sensor - HPA-Faip M 928 ROYAL Betriebs- Und Wartungsanleitung

"EXTRAORDINARY"
MOUNTING PROCEDURE
- A variation of the mounting procedure explained
above may be adopted in case of rims with
very small or non-existent drop centre (fig.11-
B). In these exceptional cases, the mounting
procedure can be facilitated by using a variant
of the normal procedure.
- The first bead is mounted in the usual way. To
mount the second bead, position the movable
tool as when approaching for demounting (fig.
32).
- This reduces the stresses, leaving more space
for the tyre. The following operations, illustrated
from fig. 28 on, remain unchanged.
CORRECT PROCEDURE
FOR DEMOUNTING/
MOUNTING RUN FLAT
TYRES FITTED WITH VALVE
SENSOR
NB: if the sensor is on the tyre valve.
Demounting
• Remove the valve plunger and let all the air
out of the tyre.
• NB: If necessary, remove the valve fixing nut
and let the sensor to fall into the tyre.
• Place the sensor at 3 o'clock.
• Lower the bead breaker disc and start the
rotational bead breaking stage.
• Lubricate the bead and continue rotational
upper bead breaking until the sensor is at 12
o'clock and not beyond.
• Raise the bead breaker disc.
• Move the sensor to 6 o'clock.
• Push in the bead breaker disc and fit the gripper
80
at 2 o'clock.
• Apply plenty of lubricant and break the lower
bead.
• Move the gripper to 2 o'clock (sensor at 6
o'clock).
• Position the demounting unit (tool head).
• Lower the swing tool to find the bead.
• Rotate clockwise so that the gripper is at 6
o'clock (sensor at 10 o'clock).
• The bead is now engaged.
• Engage the bead with the demounting head.
• Rotate clockwise to demount the tyre, with the
bead breaker disc in the down position.
• Remove the gripper.
• Now demount the tyre underside, taking care
not to damage the sensor.
32
• Refit the valve sensor (if removed).
• Lubricate both tyre beads.
• Place the sensor at 5 or 6 o'clock.
• Set the tyre at an angle of about 45 degrees
• Turn the tyre so that it touches the mounting
head and starts to be mounted on the rim.
• Rotate the tyre until the lower bead is
mounted.
• Turn the sensor to 4 or 5 o'clock.
• Lower the bead breaker to allow a bead presser
gripper to be inserted at 3 o'clock.
• Lower the bead breaking arm by about 5 cm
(2 or 3 inches) to keep the upper bead of the
tyre inside the open centre during rotation.
• Rotate the tyre and make the necessary
adjustments until the upper bead has been
mounted.
• It may be useful to help the operation with
a second Run-Flat gripper and/or the bead
Tyre mounting
User Manual M 928 ROYAL