COATS 5040 A/E Tire Changer - Manual (Page 20)

16 • Important: Always read and follow operating instructions.
9. Depress the tire sidewall downward with the aid
of the helper foot providing clearance for the mount/
de-mount head to be positioned (Figure 29). Move
swing arm into place. Increase the horizontal distance
between the demount head and the wheel an additional
1/16 to 1/8 inch with the adjustment knob.
Figure 29 - Helper Foot Depressing Sidewall of Tire, Optional
Plastic Duckhead® Shown
10. Lubricate upper bead liberally. Use the bead roller
tool to help push the tire bead down so bead area is
easier to reach for lubrication (Figure 30).
Figure 30 - Lubricate Upper Bead
11. Locate the valve stem just before the demount
head before proceeding (Figure 31).
Figure 31 - Position Valve Stem Under Demount Head
12. Place the helper foot opposite the demount
head and push the bead into drop center. Insert bead
lifting tool between knob on demount tool and tire bead
Figure 32). Use roller tool to provide clearance.
Figure 32 - Insert Bead Lifting Tool
13. Rotate lifting tool down over wheel to lift bead up
and over the knob and at the same time remove helper
foot (Figure 33).
Figure 33 - Rotate Lifting Tool Down for Demount
Valve Stem
Demount Head