Rear Wheel Spacing; Caster - Sunrise Medical Zippie ZONE Manual De Instrucciones

E N G L I S H
F. REAR WHEEL SPACING
Rear wheel spacing is measured as the gap between the top of the rear wheels and the
back-canes, and is shown as dimension X
depending on the options chosen.
NOTE– When setting the rear wheel spacing only make adjustments to one side of the chair at a time.
Loosening both sides will undo the toe setting.
To adjust the rear wheel spacing, the camber inserts (A) telescope in and out of the camber
tube (B) with hard stops at the outer limit of travel. On the left side of the chair, loosen
screws (C) (the ones closest to the camber tube). Slide the camber insert in or out to estab-
lish the required wheel spacing. Tighten screw to 62 in-lbs. (7 Nm). Repeat on the right side
of the chair, matching the wheel spacing set on the left side.
G. CASTERS
NOTE– Setting the wheelchair on a very flat table or a workbench makes this setting more accurate.
1. Adjusting Caster Angle
Checking for Caster Squareness:
Your Zippie wheelchair leaves the factory with the casters adjusted square. Any time you
change your wheelchair rear axle height, rear tire size, center of gravity position or camber
tube, you should check that the casters are still square. A caster that is not square will
result in the caster lifting off the floor as it rotates around the stem bolt
lift the front of the wheelchair up and down. Check for squareness by placing your
wheelchair on a flat, horizontal surface. Rotate both forks so that the casters are towards
the rear of the wheelchair. Place a square or pocket level against the flat surface on the
rear of the fork and note whether this surface is vertical (square)
than 1 degree away from vertical, your casters require re-squaring.
2. Re-squaring Your Casters
Locate the screw (D) inside the right caster tube and loosen using a 10mm open ended
wrench. Do not remove the screw. Simply loosen it enough to allow the teeth on the upper
and lower splines (E) to clear one another. With the stem bolt loosened, the caster fork
should pivot freely. Place the wheelchair on the floor so that the two rear wheels and left
caster contact the floor. Place some weight in the seat towards the rear to help stabilize the
chair. Place a square or pocket level against the flat surface of the fork and pivot the fork until
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it is vertical (square) . With the fork vertical, engage the teeth of the two splines to the
closest mating position. Make certain that the teeth are properly engaged and not crossed.
Shine a bright light behind the mating spline teeth and check for proper teeth engagement.
Tighten the screw (D) to secure the spline mating position. The screw should be tightened to
60 in-lbs. (6.8 Nm) to ensure that it does not loosen during use.
Record the teeth engagement position of the splines on the right fork, and adjust the left fork
in a similar fashion to the same position. Reassemble both casters, and re-check that they are
square. Replace caps.
3. 3-D Perpendicular Alignment
The allen bolt adjustment (F) provides another dimension of adjustability in addition to the
spline system. The bolt may be loosened to relieve tension in the stem assembly. The caster
angle may then be fine-tuned and the bolt retightened.
116100 Rev. D
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. Factory settings will be as narrow as possible
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36 37
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IX. DEALER SERVICE AND ADJUSTMENT
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and may also
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. If this surface is more
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B
A
C
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X EQUAL
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0° to 1° MAX
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D
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F
E