Castors; Wheel Alignment - Sunrise Medical Quickie Krypton R Directions For Use Manual

Castors

Castor, Castor adapter, Castor fork
From time to time the wheelchair may veer slightly to the right or
left or the castors may flutter. This may be caused by the
following:
• Forward and/or reverse wheel motion has not been set
properly.
• The castor angle has not been adjusted properly.
• Castor and/or rear wheel air pressure is incorrect; wheels do
not turn smoothly.
The optimum adjustment of the castors is required so that the
wheelchair runs in a straight line.
The castor plates must be re-adjusted, and the wheel locks must
be checked every time the rear wheel position has been altered.
Adjusting the castor
To ensure that both forks are set parallel, simply count the teeth
visible on both sides. After setting the castor fork, the teeth will
guarantee a secure position, allowing an adjustment of 16° in 2°
increments. Use the flat side on the front of the castor fork to
check for a right-angled position to the ground (Fig. 4.15).
The patented design allows the castor fork to be turned, so that
it can be reset at right-angles to the ground when the seat angle
is changed.
Setting the directional stability
Release the Allen screws (1) on the underside of the fork. You
can then undo the screw (2). You can now turn the black socket
(3) left or right.
Left – chair pulls to the left
Right – chair pulls to the right
Then tighten up the screw (2) again. Please set a 90° angle from
the fork to the floor.
Now tighten up the screw (1) again. (Fig. 4.16).
Fig. 4.15
+8 -8
14
Fig. 4.16
2
3
1

Wheel Alignment

Adjusting the wheel alignment
Important:To achieve the very best movement, the rear wheels
must be adjusted to their optimum position, which means
correctly adjusting the wheel alignment.
To do this, at the same height measure the distance between
both wheels front and rear to ensure that they are parallel to one
other.
The difference between both measurements should not exceed
5 mm. If the distance is greater, follow the instructions below to
adjust the track.
Krypton R tracking adjustment
Setting the toe-in/toe-out to zero
NOTE: A wheelchair with 0° axle adapters cannot have a toe-in
or toe-out. This alignment is only necessary for 3° and 6° axle
adapters.
The term "toe-in or toe-out" defines how the rear wheels of the
chair are aligned in relation to the ground. This determines how
well the wheelchair will run. Normal resistance or rolling
resistance is present when the wheelchair has neither toe-in nor
a toe-out setting.
To set toe-in/toe-out to zero: Undo the Allen screw (1) which
secures the clamp (2) of the axle adapter (3) on both sides of
the wheelchair. The wrench flats which are attached to the axle
adapter (3) must be at an angle of exactly 90° to the ground. To
do this, use an adjustment gauge (e.g. a carpenter's square)
which has an angle of 90°. Then turn the axle adapter (3) until
the wrench flat is exactly parallel to the setting gauge. Carry out
these adjustments on both sides. Then re-tighten the Allen
screws (1) of the clamp (2) on both sides of the wheelchair with
a torque of 5 Nm. (Fig. 4.17).
Adjusting the track width (only possible with 3° and 6°
camber):
The rear track width is defined as the distance between the rear
wheels, and is adjusted in the factory so that the distance
between the drive wheel and the side part is approx. 12 mm.
To adjust the track width at the rear, unscrew the Allen screw (1)
on the clamp (2) of the axle adapter (3) and pull the axle adapter
(3) further out of the axle tube or push it into the axle tube, to
increase or reduce the track width, until the desired width is
reached. Then re-tighten the Allen screws (1) of the clamp (2) on
both sides of the wheelchair with a torque of 5 Nm. (Fig. 4.17).
Repeat this process on the other side. Always make sure that
the axle adapters have been adjusted the same on both sides.
Krypton R Rev.D