Wheel Alignment - Quickie Helium Notice D'utilisation

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

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, measure the distance between both wheels
front and rear to ensure that they are parallel to one
another.
The difference between both measurements should not
exceed
5 mm.
To adjust the wheels to make them parallel, loosen the
screws and turn the axle sleeve accordingly. Make sure
that after any adjustment work, all screws are tightened
correctly (see the page on torque).
Helium Rev.5.0
Fig. 4.16
2
3
1
HELIUM tracking adjustment
Setting the toe-in/toe-out to zero.
NOTE: A wheelchair with 0° camber cylinders cannot
have toe-in or toe-out. This setting is necessary only with
3° and 6° camber cylinders.
The term "toe-in or toe-out" defines how well the rear
wheels of the chair are aligned in relation to the ground.
This determines how well the chair will run. Normal
resistance or rolling resistance is present when toe-in is
set to zero.
To set toe-in/toe-out to zero: loosen the Allen screws (1)
(1 on each side), which secure the angle tube clamp.
Check the ball in the horizontal (2) plane and turn the
angle tube (3) until the ball is in the centre. Toe-in is now
zero.
Before tightening the screws (1), check that the camber
tube is centred left-to-right. The gap should be the same
on both sides, or there should be no gap at all. Tighten the
screws to 7 Nm. (Fig. 4.17 - 4.19).
Adjusting the rear wheelbase width:
The rear wheelbase is defined as the distance between
the upper side of the rear wheels and the backrest tubes,
and is represented by factory setting (1.25 cm). This has
to be increased if a larger gap between the tyres and the
optional height-adjustable armrests has to be created
(Fig. 4.20).
NOTE: When adjusting the rear wheelbase, adjust first
one wheel then the other. If both sides are loosened at the
same time, this will alter the toe-in/toe-out adjustment. To
adjust the rear wheelbase, the parts of the camber (4)
move telescopically into or out of the camber tube (5), and
lock into place when they reach the end. Loosen screw (6)
(located closest to the camber tube) on the left side of the
chair. Move the quick-release axle inwards or outwards to
achieve the desired wheelbase. Tighten the screws to 7
Nm. Repeat this procedure on the right side of the chair
and adjust the gap so that it is the same amount as on the
left side.
Fig. 4.17
1
Fig. 4.18
15