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Quantum R-4000 www.pridemobility.com 27
V. COMFORT ADJUSTMENTS
Figure 21. Anti-Tip Wheel Assembly
ANTI-TIP WHEEL
ANTI-TIP WHEEL
BRACKET
BOLT A
BOLT B
Anti-Tip Wheels
The anti-tip wheels are designed to give your power chair increased stability on rough surfaces. The anti-tip wheels
are preset at the factory for smooth surfaces or indoor use only. If you plan on using your power chair on rough
surfaces, it may be necessary to adjust the anti-tip wheels to better suit your needs. The anti-tip wheels may need
adjustment if either of the following occur:
When accelerating, your power chair tips rearward excessively.
The anti-tip wheels constantly rub the ground.
WARNING! Consult your Quantum Rehab Provider before attempting to change the anti-tip wheel
height! Changing the anti-tip wheel height affects handling under deceleration!
WARNING! The higher you raise the anti-tip wheels, the more you increase your power chair’s
tendency to tilt rearward when accelerating. You can compensate for this by having your
Quantum Rehab Provider make a small adjustment to the pre-programmed acceleration setting
in the controller or by adjusting the seat assembly.
WARNING! The anti-tip wheels may cause trouble when ascending or descending a curb if they
are not adjusted correctly. Contact your Quantum Rehab Provider for more information.
To adjust the anti-tip wheels:
1. Loosen bolt A. See figure 21.
2. Remove bolt B.
3. Raise or lower the anti-tip wheel by 0.50 in. (1.25
cm) or 1 in. (2.54 cm) increments by aligning the
appropriate adjustment holes. See figure 21.
4. Insert bolt B into the appropriate hole for the
desired anti-tip height and tighten.
5. Tighten bolt A.
6. Raise or lower the other anti-tip wheel so that it
is at the same height.
PROHIBITED! Do not remove the
anti-tip wheels.
NOTE: Each drive tire must be inflated to the psi/
bar/kPa rating indicated on the tire in order for the
anti-tip wheels to be properly adjusted. The user
must also be seated in the power chair in order to
properly adjust the anti-tip wheels.