COATS 50xx Series Tire Changer - Manual (Page 6)

5. Determine the mounting side of the wheel. The
mounting side is the narrow side of the drop
center. (Tire removed in Figure 4 for clarity.)
Figure 4 – Determining Mounting Side of Wheel
6. Place tire/wheel assembly on table top with
mounting side up (Figure 5). Use the clamp
control pedal to move the clamps inwards (push
pedal down) or outwards (toggle pedal up).
Clamp steel wheels from the inside (clamps
push outwards against wheel). Clamp mag and
custom wheels from the outside (clamps push
inwards against the outside rim edge). Refer to
the Performance Tires and Wheels section.
Figure 5 – Place Tire/Wheel Assembly on Table Top
7. 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 head into contact with the
rim edge. Push the locking handle back to lock
the slide into place. As the slide is locked, the
mount/demount head will move upward
approximately 1/8 inch from rim edge (Figure 6).
Figure 6 - Position Mount/Demount Tool
8. The mount/demount head roller should be in
contact with the rim edge. Turn the swing arm
adjusting knob to move the roller away from the
rim 1/8 to 1/4 inch (Figure 7).
Figure 7 - Adjust Swing Arm to Position Head Roller
9. Check head positioning. Mount/demount head
should be positioned with 1/8 to 3/16" clearance
between the top of the rim edge and the bottom
of the head, and 1/8 to 1/4 inch clearance
between the rim edge and the head 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 head (when changing
a like set of wheels) (Figure 8).
Figure 8 - Proper Mount/Demount Head Position
H. The vertical 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.
10. Insert the smooth curved end of the bead lifting
tool over the forward end of the demount head
and below the top bead of the tire. Use your free
hand to press down on the tire opposite the
head to help with tool insertion (Figure 9).
4 • COATS 50xx Series Rim Clamp Tire Changers
Narrow Side
Long Side
Drop Center
1/8" to 1/4"
1/8" to 3/16"