4-4
ZRA_Aero Z Owner’s Manual
OM_ZRA_Aero Z_0913RevA
CHAPTER 4: BACKRESTS And PUSH HAndLES
Replacing the Backrest
Tools Needed:
• 5/32” Allen Wrench
1. Remove the backrest upholstery. See “Velcro
®
-Style
Adjustable Back Upholstery” or “Tension Adjustable by
Straps Back Upholstery” on pages 7-1 to 7-3.
2. Remove the backrest posts. See “Adjusting the
Backrest Height” on pages 4-2 and 4-3.
3. Remove the backrest sleeves. See Figure 4-5.
4. Remove the two Allen screws (one on each side of the
chair) and remove the backrest. See Figure 4-6.
5. Install the new backrest and securely tighten the two
Allen screws.
6. Install the backrest sleeves in the new backrest.
7. Reinstall the backrest posts.
8. Reinstall the backrest upholstery.
I
WARNING
The threads on the Allen screws that secure the backrest
posts to the backrest have been treated with a Vibra-TITE
®
VC-3, a locking and sealing coating, to reduce the possibility
that they will become loose. TiLite requires that
you reapply Vibra-TITE
®
VC-3 each time your backrest is replaced.
If you ignore this Warning, your backrest posts
could become loose or disconnected from the wheelchair, and you could fall, tip over or lose control of the wheelchair
and seriously injure yourself or others or damage the wheelchair.
FOLDING ADJUSTABLE DEpTH, HEIGHT & ANGLE BACKREST
(Titanium or Aluminum)
I
WARNING
Before using your wheelchair, make sure the Folding Adjustable Depth, Height & Angle Backrest is securely in place
in the upright position and all mounting hardware is securely tightened.
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.
Adjusting the Depth
Tools Needed:
• 7/16” Open End Wrench
• 5/32” Allen Wrench
1. Remove the four Allen screws (two on each side) that secure the back mount to the seat tube. Note the order of
the saddles, washers and nylock nuts. See Figure 4-7.
2. Reposition the back mounts to the desired depth.
3. Reinstall the four Allen screws through the back mount, seat tube, saddles, washers and securely tighten the
nylock nuts.
Note:
If your chair has Swing Away Armrests. See Figure 4-8. You may need to use the longer screw provided
with your chair in order to secure both the back mount and the armrest receiver.
I
WARNING
Any changes to the depth of the backrest will affect the stability (
i.e. center of gravity) of the chair. Use extreme
caution when using a new backrest depth as it may make the chair more prone to tip over. After adjusting the depth
of the backrest, you must consider whether additional changes need to be made to compensate for the modified
stability of the chair (
e.g., changing the rear axle position, backrest angle, rear seat height). If you ignore this
Warning, your chair may not perform properly, which in turn, may cause you to fall, tip over or lose control of the chair
and seriously injure yourself or others or damage the chair.
Figure 4-6
Replacing the Backrest
Allen
Screws