Rear Wheel Spacing; M.casters - Quickie GT Owner's Manual

E N G L I S H
L. 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 D
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 each end of travel. On the left side of the chair, loosen screw (C)
(the one closest to the camber tube). Slide the camber insert in or out to establish the
required wheel spacing. Tighten screw to 144 in-lbs. (16.3 Nm). Repeat on the right side of
the chair, matching the wheel spacing set on the left side.
M. 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 Quickie 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
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)
from vertical, your casters require re-squaring.
2. Re-squaring Your Casters
Gently pry cap (E) off of both caster tubes. Locate the set screw (F) inside the right caster
tube and loosen using an 8mm Allen wrench. Do not remove the set screw. Simply loosen it
enough to allow the teeth on the upper and lower splines (G) 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 sur-
face of the fork and pivot the fork until it is vertical (square)
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 set screw (F) to secure the spline
mating position. The set screw should be tightened to 192 in-lbs. (21.7 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 (E).
3. 3-D Perpendicular Alignment
The allen bolt adjustment (H) 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.
109880 Rev. B
25 26
. Factory settings will be as narrow as possible
26
27 28
28 . If this surface is more than 1 degree away
29 30
30
27 and may also lift the
28 . With the fork vertical,
18
25
B
A
C
26
D
27
28
0° to 1° MAX
29
E
F
30
H
G
IX.