Quickie
®
NITRUM
249817 Rev. A
29
IX. DEALER SERVICE AND ADJUSTMENT
P. REAR AXLE
The most important adjustment on your Quickie wheelchair is the position of the rear axle. The center of
gravity and wheel camber are determined by the axle adjustment.
1. Center of Gravity Adjustment
WARNING
The more you move your rear wheels forward, the more likely your chair will tip over backwards. Always
make adjustments in small increments, and check the stability of your chair with a spotter to prevent a tip-
over. We recommend that you use anti-tip tubes until you adapt to the change and are sure you are not
at risk to tip over. Refer to additional Warnings in Section VI “Falls and Tip Over”.
NOTE– Changes to the center of gravity may aff ect the rear seat height (Section IX-L), toe-in/
toe-out of the rear wheels (Section IX, O-3) and the squareness of the casters. If you
change your center of gravity position, re-adjust all of these settings if necessary. Refer to
Section IX-J.
NOTE– Adjusting your chair’s center of gravity will require re-adjusting the location of the wheel
locks (if provided). See Section IX-F for instructions on adjusting the wheel locks.
NOTE– Range of adjustment can be limited by chair confi guration and options selected.
a. Adjusting the Center of Gravity: Open Frame
You can adjust your center of gravity position by moving the two axle plate clamps (A) forward or
rearward on the seat tube (B). Moving the axle plate clamps forward shortens the wheelbase and
lightens the front end, making your chair more maneuverable. Moving the axle plates rearward makes
the chair more stable and less likely to tip over rearward.
i. To adjust the center of gravity location, remove both rear wheels.
ii. Loosen the 4 screws (C) (2 per side) that secure the axle plates (A) to the seat tubes. Slide
both axle clamps forward or rearward along the seat tube to the desired position.
Make sure both sides are adjusted symmetrically before tightening screws. Tighten screws to
62 in-lbs. (7 Nm).
iii. Once the axle plate clamps are secured, attach the rear wheels.
iv. Occupy the chair and maneuver it with a spotter to get a feel for the new adjustment.
2.
Wheel Camber
Wheel camber, shown as angular relationship (G), provides greater side-to-side stability due to the
increased width and angle of the wheelbase. It also allows for quicker turning and greater access to
the top of the handrims.
Wheel camber is determined by pairs of interchangeable camber plugs which are available from your
authoriz
ed supplier in 0º, 3°, and 6º angles.
67
67
68
68
Summary of Contents for Quickie Nitrum
Page 33: ...249817 Rev A 33 NOTES...
Page 34: ...249817 Rev A 34 NOTES...
Page 35: ...249817 Rev A 35 NOTES...
