7-3
ZRA_Aero Z Owner’s Manual
OM_ZRA_Aero Z_0913RevA
CHAPTER 7:
BACK UPHOLSTERY, SEAT UPHOLSTERY AND SEAT
CUSHIONS
Replacing
1. Lift the back flap to expose the backrest ears. See Figure 7-5.
2. Completely detach the backrest ears and the strap(s) from the padded back and remove them from the backrest.
Note:
If your chair has Integrated or Fold-Down Push Handles, you will need to remove the bolts that secure the
backrest ears to the backrest (using a 1/8” Allen wrench) and the bolts that secure the backrest posts inside the
backrest (using a 5/32” Allen wrench). See Figure 7-3 and see “Adjusting the Backrest Height” on pages 4-2 to
4-3.
3. Remove the seat cushion.
4. Detach the bottom flap from the seat upholstery at the underside of the seat upholstery.
Note:
On chairs with depth adjustable backrests, the back upholstery attaches to the top of the seat upholstery.
5. Attach the bottom flap of the new back upholstery to the seat upholstery at the underside of the seat upholstery
6. Install the new backrest ears on the backrest.
7. Adjust to the desired tautness. See “Adjusting the Tension” on page 7-2.
8. Align the top of the padded back with the backrest ears.
9. Reinstall the strap(s) and adjust to the desired tautness.
10. Securely attach the padded back to the backrest ears and lower the back flap back into position in front of the
rigidizer bar.
11. Replace the seat cushion.
Figure 7-5
Adjusting
Padded
Back
Back
Flap
Backrest
Bottom
Flap
Ear Straps
Backrest
Ears
Corbac
®
Adjustable Contour Back Support
For information regarding the use and adjustment of the Corbac
®
Adjustable Contour Back Support, consult the
owner’s manual provided by the manufacturer, Ride Designs.
Tension Adjustable By Straps Seat Sling Upholstery
I
WARNING
Do not make the tension of the seat sling upholstery so loose that it does not properly support your weight. You
must never permit the sling to become so loose that your weight is borne by the crosstube below the seat sling. See
Figure 7-6.
If you ignore this Warning, you may develop pressure sores, which can be a life-threatening medical
complication.
Adjusting the Tension
1. Remove the seat cushion.
2. Detach the back upholstery from the seat upholstery (see “Velcro
®
-Style Adjustable Back Upholstery” on page 7-1
or “Tension Adjustable by Straps Back Upholstery” on pages 7-2 to 7-3).