Bead Breaking - Cormach CM 646 Handbuch Für Gebrauch Und Wartung

A
DANGER
When working these wheels it is possible
to damage the tyre, the rim or both, with
the risk of the tyre exploding under pres-
sure causing serious injury or death. When
mounting tyres on this type of wheel, use
the utmost caution.
European style high performance whe-
els (asymmetrical curvature)
Some European wheels have very pro-
nounced curves on the rim edge, except in
the area of the valve hole. On this type of
wheel bead breaking must be performed
in correspondence with the valve hole and
on the lower and upper side of the wheel.
Fig.9b
A Valve hole
B Slight curvature
C Pronounced curvature
A
B
Wheels for Corvette, BMW, Lamborghini
and other wheels with "Low pressure
indicator system"
Some types of high performance wheels
CM 646 - CM 646 GT
are equipped with a pressure transmitter
secured to the rim with a belt on the side
opposite the valve hole. On this type of
wheel bead breaking must be done initially
in correspondence with the valve hole, on
both sides of the rim.
Fig.9c
A Valve hole
9a
B Transmitter
C Attachment belt
- Fully deflate the tyre, removing the valve
- Adjust the position of the shovel throu-
gh the pin (1 fig. 10A) based on the size
of the tire.
- Position the wheel as shown in fig.11 and
bring the bead breaker shoe to the edge
of the rim.
IMPORTANT: During the bead breaking
operation, you are advised to keep the
table top closed (locking clamp towards
center) (A fig.11).
- Press the pedal 10 (fig.11) to operate the
bead breaker and detach the bead from
the rim.
C
Repeat this operation on the other side
of the wheel.
It may be necessary to break the bead at
9b
several points to free it completely.
After detaching the beads, remove the
old balancing weights.
- Thoroughly lubricate the sides of the
tyre around the entire circumference of
the lower and upper bead to facilitate
A

Bead breaking

B
C
9c
51