COATS CDH-4730 Electric-Hydraulic Tire Changer - Manual (Page 20)

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13) Turn the spindle until the valve is at the bottom (6 o’clock).
14) Move the ramp (10 fig. 36) under the wheel and lower the spindle until the tire is pressed down against the ramp. Move the ramp
slightly towards the outside so. The tire will open a little, to create some space to insert the inner tube.
NOTE: The valve hole may be asymmetrical to the centre of the rim. In this case position and insert the inner tube as shown in Fig. 36.
Insert the valve through the hole and fix it with its locking ring.
15) Fit the inner tube into the drop center of the rim (NOTE: to facilitate this turn the spindle clockwise).
Fig.35
Fig.36
10
10
16) Turn the spindle until the valve is at the bottom (6 o’clock).
17) Inflate the inner tube a little (until it has no folds) so as not to pinch it while mounting the second bead.
18) Attach an extension to the valve and then remove the locking ring.
The purpose of this operation is to allow the valve to be loose so that it is not ripped out during second bead mounting.
19) Lift the tire again and attach the g-clamp outside the second bead about 8 inches (20 cm) to the right of the valve (Fig. 38).
20) Turn the spindle clockwise until the clamp is set at 9 o’clock position.
21) Move the tool carrier arm to its working position.
22) Bring the tool forward until the red reference dot is lined up with the outside face of the rim at about 1/4” (5 mm) from it.
23) Turn the spindle clockwise until the tire is completely mounted on the rim. (Fig. 39)
24) Remove the g-clamp. Remove the tool by turning the spindle counterclockwise and pulling the tool arm to the outside.
25) Tip the tool carrier arm to its non-working position.
26) Position the ramp directly under the tire and lower the spindle until the tire rests on the platform.
27) When the tire is resting on the ramp, check to make sure the valve is perfectly centered with its hole. If not, turn the spindle slightly to
adjust the position. Fix the valve with its locking ring and remove the extension.
28) Remove the rim clamping hub nut. Support the tire to prevent it from falling off.
29) Move the ramp to release the tire from the spindle and remove the tire.
DANGER! PONTETIALLY HAZARDOUS OPERATION!
Do it manually only if you are certain you can keep the tire balanced. For large and heavy tIres an adequate
lifting device must be used.