Adjusting The Height - Quickie Nitrum Bedienungsanleitung

2. Adjusting the height:

If the wheelchair does not stand properly on 4 wheels, i.e. one
of the castors is not completely touching the floor, the height of
this castor should be adjusted as follows:
• Place the wheelchair on a flat surface, such as a worktop or
similar.
• Load the footrest with a weight of approx. 1 kg, make sure
that the air pressure is identical in both drive wheels, and
rotate both castors into the straight line position (castors
pointing to the back)
• Insert special Sunrise Medical tool (C spanner, item no.
66009203-ET) into a ¼" ratchet or torque wrench
• Undo the round nut between the fork and castor connection
with the C spanner
• Grasp the castor axis between the round nut and fork with a
flat 19 mm open-end spanner (item no. 66009203-ET) and
rotate it anticlockwise. The castor will be lowered by 1 mm
with each complete turn (360°)
• If the castor axis is rotated by one complete turn (360°), this
will not influence the directional stability. In all other cases,
the directional stability must be re-adjusted. See "1. Setting
the directional stability" for more on this.
• Adjust the castor axis until all 4 wheelchair wheels are
standing firmly on the ground
• After the adjustment has been made, keep the castor axis in
position with the open-end spanner while tightening the
round nut to a torque of 28 Nm.
3. Adjusting the castor fork angle
This adjustment is necessary if the seat height/centre of gravity
has been changed, or the directional stability has been
adjusted.
WARNING: an incorrectly adjusted castor fork angle may
cause the castors to wobble, and lead to the user falling or
severe injuries.
NOTE: setting the fork to toe-out (fork is inclined towards the
back in the direction of travel) will increase the probability of the
castors wobbling. Setting it to toe-in (fork is inclined towards the
front in the direction of travel) can reduce the probability of the
castors wobbling. The angle of the castor fork is set by the
factory with a slight toe-in.
Loosen the Allen screws (A) (Fig. 6). The castor fork angle can
now be adjusted to the front (toe-in) or to the back (toe-out).
To ensure that the castor fork is in an exactly horizontal position
(90° to the floor, neither toe-in or toe-out), you will need a
setting gauge (e.g. 90° flat angle, set square). Rotate the
castors in the travelling position and place the setting gauge on
the flat front side of the fork (Fig. 7). The castor fork will be at an
angle of 90° to the floor when the setting gauge covers the
entire surface.
If you want to set the fork slightly to toe-in, e.g. to prevent the
castor fork from wobbling, set the angle so that a slight light gap
can be seen between the setting gauge and contact area.
When you have set the correct position, then tighten the allen
screws (A) using the following procedure:
Tighten the outer allen screw first to a torque of 7Nm, than
tighten the inner allen screw to a torque of 7Nm.
Repeat this procedure up to 6 times until both allen screws are
evenly tightened to a torque of 7Nm.
Assembly and adjustment instructions for castor fork
4. Replacing the castor fork
• Remove the locking clip (A) at the lower end of the castor
axis (Fig. 8)
B
• Remove the nut (B) with a 13 mm open-end or ring spanner
• Now replace the fork
• Reassemble by following the instructions in reverse order.
Observe the nut's tightening torque of 10 Nm (B)
Item no. 66009215 Rev.B
A
Fig. 6
90
O
Fig. 7
A
Fig. 8
3