Permobil K450, Service Manual

Page: 19 / 72

19
Suspension
The suspension must be adjusted so that the angle of
the pivot wheels against the ground is 90° under normal load.
Adjusting the spring force.
Suspension
Adjusting the spring force
The spring force must be adjusted to the right
value. See illustration.
The spring force can be adjusted to suit different
body weights by means of the adjusting nut.
Reduce the value for a softer suspension, and
increase the value for a harder suspension. Use
the attached box spanner for adjustment.
1. Place the wheelchair on a level surface.
2. Switch off the main power switch on the
control panel.
3. Turn the adjustment nut clockwise for harder
suspension and anti-clockwise for softer
suspension. Hold the axle using a suitable
tool, for instance a screwdriver, in the hole in
the middle of the axle. See illustration.
Adjusting nut
Body weight Adjustment
Adjusting the suspension
0 - 33 lbs
33 - 66 lbs
66 - 99 lbs
99 - 125 lbs
0.22" (5.5 mm)
0.26" (6.5 mm)
0.33" (8.5 mm)
0.39" (10 mm)
It is important to adjust the suspension correctly. Remember
that extra equipment and luggage on the wheelchair affect
the weight and mean the suspension will need to be adjusted.
The suspension always needs to be adjusted the same
amount on the right and left side of the chassis.
Too soft or hard suspension mean that the wheelchair’s pivot
wheels will not be vertical, which will affect the operating
properties of the wheelchair negatively.
90°
90°
Adjustment
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NOTE