MK-100083 Rev. A
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Q UI C KI E 5 R
J. 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:
The Quickie wheelchair leaves the factory with the casters adjusted square. Any time a change is
made to the wheelchair rear axle height, rear tire size, center of gravity position or camber tube,
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 and may also lift the front of the wheelchair up and
down. Check for squareness by placing the 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). If
this surface is more than 1° degree away from vertical, the casters require re-squaring.
2. Re-squaring the Casters
a.
Locate the bolt (A) inside the right caster tube and loosen (do not remove) using a 10mm
open end wrench. Loosen this bolt enough to allow the teeth on the upper and lower splines
(B) to clear one another. The caster fork should pivot freely.
b.
P
lace 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 it is vertical or 90°
to the riding surface (square).
c. 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.
d. Tighten the screw (A) to secure the spline mating position. The screw should be tightened to
a minimum of 100 in-lbs. (11.3 Nm) to ensure that it does not loosen during use.
e. 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.
3. 3-D Perpendicular Alignment
a.
The hex bolt adjustment (C) provides another dimension of adjustability in addition to the
spline system.
b.
The caster angle may then be fine-tuned and the bolt retightened.
4. Correcting a Pull to the Right or Left
Determine which direction the chair is pulling (right or left). Make the following adjustments to the
caster on that side of the chair:
a. Loosen the bolt (A) inside the caster tube using a 10mm open-end wrench.
b. Loosen the screw on the upper spline (C).
c. Rotate the upper spline (D) to turn the caster fork toward the forward driving direction. Turn
the ring clockwise, and the fork will swing outwards. Turn the ring counter-clockwise, and the
fork will swing inwards.
d. When the caster fork is correctly rotated forward, retighten the screws.
e. After making the desired adjustment, recheck the squareness of the casters.
f.
Re-torque Bolt (A) to a minimum of 100 in-lbs (11.3Nm).
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IX. DEALER SERVICE & ADJUSTMENT
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0° to 1° MAX
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A
B
C
D