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:
• The forward 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 for the
wheelchair to run in a straight line.
Castors should always be adjusted by an authorized
dealer. The castor plates must be re-adjusted, and the
wheel locks must be checked any time the rear wheel
position has been altered.
Castors
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).
Wheel alignment
Adjusting The Wheel Alignment
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).
Fig. 4.15
+8 -8
Fig. 4.16
1
2
3
Seat
Fig. 4.14
1
2
3
Adjusting The Seat Height
To adjust the rear seat height release the Allen screws
(1) (one on each side), which fix the clamp to the axle
stem (2). Remove the spacer bracket (3), to adjust the
seat height +/- 1 cm. For large adjustments, reduce the
length of the axle stem as required.
Tighten the 2 Allen screws to 7 Nm. (Fig. 4.14).
NOTE:
An adjustment to the castor angle may be necessary
when adjusting the rear seat height .
Seat sling
To tighten the upholstery, please use the straps below
the upholstery.
Please see the separate Owners' Manuall for
details of the Snoll On accessory.
