Zippie
®
SPHYNX
252843 Rev. B
23
9.0 DEALER SERVICE AND ADJUSTMENT
9.17
Seat frame
Telescoping seat tube
Rear seat sling
9.18
Rear bolt
9.20
9.21
Screw
Rear seat
rail plug
9.24
9.25
Rear seat
rail plug
Rear seat
sling
Rear Seat Sling Tension Adjustment
1.
Remove seat cushion.
2.
Remove front seat sling by completing steps 2-4
from Front Seat Sling Adjustment (previous page).
3.
Remove telescoping seat tubes. (Fig 9.17)
4.
Remove rear bolts and nuts from outer seat rail.
(Fig 9.18)
5.
Insert the short end of a 6mm allen wrench into
the channel of the rear seat rail plug and rotate plug
inward so that the channel faces up. Complete on
both sides of chair. (Fig 9.19)
6.
Remove rear seat sling and rear seat sling rods.
7.
Adjust tension by adjusting Velcro
®
foldover on
sling.
8.
Replace rear seat sling and seat sling rods
positioning as far back as possible, until rear seat
sling bottoms out on fl athead screw and rear seat
rail plug bottoms out at backstop. (Fig 9.20,
Fig 9.21, Fig 9.22, Fig 9.23)
9.
Tighten back edge of rear seat sling:
a. Make sure the backrest is in the most
forward recline setting (85°) to make rear
bolt hole accessible.
b. Insert the short end of a 6mm or 1/4” allen
wrench L-Key (or similar sized tool with
90° bend) into the exposed channel of
rear seat rail plug and rotate rear plug 90°
outward until its bolt hole is aligned with
the hole in the outer seat rail and rear
plastic covers (Figures 9.24 & 9.25).
c.
With the holes aligned, insert bolt as shown in
Fig 9.18. Do the same to the other side which
should pull the rear end of the rear seat sling
taut and insert the bolt while holding the sling
taut, making sure the holes are aligned.
Note: If the rear end of the seat sling is not taut,
remove the seat sling and adjust the width of the
sling with the Velcro
®
adjustment. When the rear
seat sling assembly is properly attached with the
desired tension, fasten nuts on to the bolts.
(Fig 9.18)
10. Insert telescoping seat tubes to appropriate seat
depth setting. Mark on side frame should align with
mark on telescoping seat tube. (Fig 9.26)
11. Insert front seat sling and seat sling rods.
12. Turn telescoping seat tube outward to align holes
and insert bolts on both sides of chair and fasten
with nuts. Torque each of the two nuts to
16.3 Nm [144 in-lbs] with a 10mm torque
wrench while securing bolts with a standard
4mm Allen.
Do not attempt to use a 4mm
Allen head torque wrench as this will likely
damage the hex socket portion of the bolt
head.
13. Attach seat rail end caps by starting with slot in end
cap inserted into seat sling. Then, rotate outward
so that channel in cap is facing up. Push end cap
until it bottoms out on telescoping seat tube.
(Fig 9.27 & Fig 9.28)
9.27
Seat rail end cap
9.22
9.23
Rear seat
rail rods
Seat frame
Rear seat
sling
Rear
plug
Seat frame
Backstop
9.26
Telescoping
seat tube
0
15
15
30
30
45
TORQUE !
Seat depth
indicator
marks
9.19
Backstop
9.28
9.17
9.18
9.19
9.20
9.21
9.22
9.23
9.24
9.25
9.26
9.27
9.28
Rear seat
rail plug
Channel facing up
Seat frame