931134 Rev. A
I X . S e t - u p & A d j u s t m e n t
41
1. Adjustment
a. Loosen rear bolt (B).
b. Loosen and remove front bolt (A) from the car-
riage on each side.b.
c. Set the carriage at desired range setting using
one of the 3 holes.
d. Replace and tighten all bolts.
IMPORTANT NOTE–
The adjustment on each side of the
chair should be exactly equal.
NOTE–
Use a torque setting of 350 in.-lbs. When set-
ting-up carriage.
2. Range and setting
a. Location C: -5° to 50°
b. Location D: 0° to 55°
c. Location E: 5° to 60°
3. Top Roller Adjustment
Tools recommended: (1) 1/4" open-end wrench and
(1) 9/16" open-end wrench.
IMPORTANT NOTE–
Remove the rider from the chair
before performing this maintenance.
NOTE–
It is highly recommended to adjust all 4 of the
top rollers at the same time.
a. Loosen the cam nut (F).
b. Use a 1/4" wrench to rotate the eccentric cam
bolt (G) clockwise until the top roller (H) just
makes contact with the rocker (I).
c. While holding the 1/4" wrench, tighten the 9/16"
nut (F) to approximately 120 in-lbs of torque to
lock the assembly into place. Although the top
roller should be touching the rocker, there should
be NO CONTACT PRESSURE of the top roller
against the rocker when the assembly is in the
tightened condition. The top roller should be able
to rotate by applying mild finger pressure.
NOTE–
Use a torque setting of 120 in.-lbs. when setting-
up top roller.
4. Top Roller Replacement
NOTE–
It is highly recommended to replace both top
rollers within each carriage assembly at the
same time. Do not use lubricants anywhere on
the assembly.
a. Loosen both plunger pin bracket nuts (J).
b. Loosen and remove both bottom roller nuts (K)
and both chassis fastener nuts (L).
I X . S e t - u p & A d j u s t m e n t
931134 Rev. A
40
Moving the axles FORWARD shifts more of the rider’s
weight onto the REAR wheels, providing the following
benefits: the front end of the wheelchair becomes
lighter, thus reducing the turning effort, and with a
shorter wheelbase the turning radius is reduced.
6. Axle Adjustment
a. Remove both wheels from the chair.
b. Remove the bolts (A) from the axle plate (B).
c. Reposition the axle plate in desired position.
d. Insert and tighten bolts (A).
e. Repeat on the other side.
IMPORTANT NOTE–
The adjustment on each side of the
chair should be exactly equal.
IMPORTANT NOTE–
Do not attempt to make this
adjustment. This adjustment must be done by an
authorized supplier only.
NOTE–
Use a torque setting of 350 in.-lbs. When set-
ting-up the axle plate.
7. Axle Height Adjustment
a. Loosen and remove bolts (A).
b. Set axle at desired height using pre-set holes in
the axle plate (B).
c. Replace and tighten bolts.
d. Repeat on other side.
IMPORTANT NOTE–
The adjustment on each side of the
chair should be exactly equal.
IMPORTANT NOTE–
Do not attempt to make this
adjustment. This adjustment must be done by an
authorized supplier only.
NOTE–
Use a torque setting of 350 in.-lbs. When set-
ting-up the axle plate.
NOTE–
The frame must be kept horizontal when height
adjustments are made. Refer to matrix in the
ordering guide for proper setting.
U. CARRIAGE
The carriage of the standard IRIS can be adjusted to
preset the range of tilt from –5° to 50° from 0° to
55° or from 5° to 60°.
IMPORTANT NOTE–
Do not attempt to make this
adjustment. This adjustment must be done by an
authorized supplier only.
E
C
D
G
H
I
F
A
B
J
O
O
P
P
K
M
L
Q
N
N
A
B
