COATS 7xxx Series Tire Changer - Manual (Page 10)

6 • Important: Always read and follow operating instructions.
8. Move the swing arm into position. Pull the locking
handle forward to release the slide. Push down on the
top of the vertical slide
to move the demount
tool into contact with
the rim edge. Push the
locking handle back and
lock the slide into place.
As the slide is locked,
the mount / demount
tool will move upward
approximately 1/8-inch
from rim edge (figure 8).
Figure 8 - Position Mount/Demount Tool
9. The mount/demount tool should be in contact with
the rim edge. Turn the swing arm adjusting knob to
move the mount/demount tool away from the rim 1/8
to 1/4 inch (figure 9).
Figure 9 - Adjust Swing Arm to Position Tool
10. Check metal tool positioning. Mount/demount
metal tool should be positioned with 1/8 to 3/16 inch
clearance between the top of the rim edge and the
bottom of the tool, and 1/8 to 1/4 inch clearance
between the rim edge and the tool roller. This clearance
will be maintained as long as the locking handle and
adjustment knob are not changed. The operator may
swing the arm out of the way and back into place again
without needing to reposition the tool (when changing
a like set of wheels) (figure 10).
Figure 10 - Proper (Metal & Hybrid) Mount/Demount Tool
Position
11. Check plastic tool positioning. Mount/demount
plastic tool should be positioned with 1/16 to 1/8 inch
clearance between the top of the rim edge and the
bottom of the tool, and 1/16 to 1/8 inch clearance
between the rim edge and
the inside surface of the
tool. This clearance will
be maintained as long as
the locking handle and
adjustment knob are not
changed. The operator
may swing the arm out
of the way and back into
place again without need-
ing to reposition the tool
(when changing a like set
of wheels) (figure 11).
Figure 11 - Proper (Plastic) Mount/Demount Tool Position
H. The tool clearance may change with machine use
and should be inspected often. Failure to maintain
the proper clearance may result in damage to the
wheel rim and/or tire.
J. Normal table top rotation for demounting is clock-
wise. Depress the table top pedal to rotate this
direction. To rotate the table top counterclockwise,
lift the pedal up with your toe.
K. Table top rotation can be stopped at any time by
removing your foot from the rotation pedal.
CAUTION
At times during the mounting and demount-
ing procedure, the bead lifting tool may
encounter resistance and can be thrown.
Keep one hand firmly on the tool to avoid
possible tool disconnect. Use the reversing
feature to back out of jam-ups. A thrown
tool can cause injury.
12. Insert the smooth curved end of the bead lifting
tool over the forward end of the demount tool and
below the top bead of the tire (figures 12 & 13). Lift
the bead up and over the knob on the demount tool
(figure 12 & 13). Also, note the valve stem position to
the demount tool. Use the Robo Arm to push down on
the tire opposite the demount tool to allow the bead
to utilize the drop center area of the rim, this position
reduces stresses in the bead and allows an easier bead
lift.
Note: When using a hybrid mount/demount tool, push
the tail into the wheel before lifting the tire with the
bead lifting tool.
3/16" to 1/8"
1/8" to 1/4"
1/16" to 1/8"
1/16" to 1/8"