9-3
ZRA_Aero Z Owner’s Manual
OM_ZRA_Aero Z_0913RevA
CHAPTER 9: AXLES
Adjusting the “play”
I
WARNING
quick-Release Axles are pre-adjusted to permit minimal “play” in the axle. TiLite recommends that you do not adjust
the axle. Improperly adjusting the axle could cause it to malfunction—too much “play” can cause the axle to bend
and become stuck in the axle sleeve or Zero Play camber tube1; too little “play” can prevent the locking balls from
engaging fully, causing the wheel to disengage from the chair without warning. TiLite recommends that an authorized
TiLite dealer make any adjustments.
If you ignore this Warning, you may fall, tip over or lose control of the wheelchair
and seriously injure yourself or others or damage the wheelchair.
If there is too much “play” in the axle so the wheel is loose when locked into position in the axle sleeve or Zero Play
camber tube, or too little “play” so the locking balls do not properly engage, follow this procedure:
Tools Needed:
• 5/64” Allen Wrench
1. Flip the quick-release handle to the unlocked position and remove the rear wheel and quad quick-Release Axle.
See Figures 9-3 and 9-4.
2. Adjust Set Screw 3 on the quick-release nut so that no portion of Set Screw 3 is protruding out of the opposite
side of the quick-release nut (the side adjacent to the wheel hub).
3. Loosen Set Screw 1 on the collar.
4. Replace the wheel on the chair.
5. With the wheel still on the chair and the quick-release handle in the locked position so the locking balls are fully
engaged, be sure the collar is snug against the outer rear wheel bearing and securely tighten Set Screw 1 so the
collar is securely on the axle.
6. With the quick-release handle in the unlocked position, turn Set Screw 3 clockwise to remove any remaining play
between the wheel hub and collar.
7. Flip the quick-release handle to the locked position and check the “play” in the axle. Make sure the locking
balls fully engage and lock the axle into the camber tube. If there is still too much “play” in the axle, repeat the
procedure in Step 6. If you have taken too much “play” out of the axle, repeat the procedure in Step 6, but turn
Set Screw 3 counterclockwise to add “play” to the axle.
8. Before riding in the chair, check the “play” in the wheel and check to make sure the locking balls have fully
secured the axle inside the axle sleeve or Zero Play camber tube by pulling on the hub with the quick-release
handle in the locked position. If the locking balls do not properly engage or there is too much “play”, return to
Step 1 and repeat this procedure.
I
WARNING
The threads on the set screws on the quad quick-Release Axle assemblies are treated with Loctite
®
242
®
, a medium
strength thread lock. If you loosen any set screw, you MUST remove and reapply Loctite
®
242
®
or an equivalent
medium strength thread lock.
If you ignore this Warning, your rear wheel could become loose or fall off and you could
fall, tip over or lose control of the wheelchair and seriously injure yourself or others or damage the wheelchair.