Snap-On EEWH315A, Руководство по эксплуатации

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EEWH315A and 317A Tire Changer Operation Manual
Operation Manual Page 23
Depressor will be useful numerous times throughout
the remount cycle. When remounting a tire the bead
depressor will ensure that the bead stays down in the
drop center of the rim until the entire bead has been
remounted onto the rim.
Once the first bead has been remounted move the
bead depressor into position just behind the mount
demount head. Now depress the second bead down
1-3”. Activate the turntable, as the second bead moves
across the mount/demount head the bead depressor
will follow the tire around and ensure that the bead
does not prematurely seat causing the mount/demount
head to jam (Fig. 5.3-2).
905
Fig. 5.3-2
The third tool integrated into the PBA is the Bottom
Bead Roller. This device will be useful at several times
during the demount cycle. First the bottom roller can
be used to unseat a stubborn lower bead, which may
5.3 OPERATING THE PNEUMATIC BEAD ASSIST
All Snap-on model EEWH315A & EEWH317A High
Performance Model come equipped with a specially
designed “Pneumatic Bead Assist Device” (referred
to as the PBA). The PBA offers the combined benefits
of both reducing the amount of physical exertion
required by the tire technician as well as providing an
added level of safety by allowing the machine to do
the work rather then the technician. Simply put the PBA
allows the technician to apply pneumatic power when
most needed in the tire changing process.
The PBA consists of three separate devices, which
are attached to a powerful pneumatic cylinder, which
raises and lowers the devices as needed.
First is the Upper Bead Roller. The Bead Roller can
be used to drive stiff upper beads down into the drop
center of the rim. This function will be useful both when
lubricating a tire prior to being removed from the rim
as well as when remounting the second bead of a High
Performance or Runflat design tire (Fig. 5.3-1).
901
Fig. 5.3-1
Move the bead roller into position overtop of the tires
sidewall. While the turntable is turning lower the roller
down into contact with the sidewall. Depress the bead
down 1-2” now you may insert the lubrication swab to
safely lubricate the upper bead.
Second is the Bead Depressor. The Bead Depressor
consists of a formed rubber head mounted on a
movable arm designed to comfortably depress the tires
sidewall. The size and mobility of the arm will allow
the formed head to depress the tire at any position
around the 360 degrees of rotation. The Bead