JOKER EVOLUTION 31
With an active setting the wheelchair tips back easily,
therefore we highly recommend to mount an anti tip
system (see chapter 7.3 “anti tipper”)
6.6 Front
wheels height and fork angle adjustment
The front wheels and fork can be adjusted in different ways as
follows:
Angle adjustment:
The adjustment of the angle of the front forks needs
to be checked periodically in order to ensure that the
axis of the fork always remains at 90° to the groun d.
The adjustment or at least the inspection will in any
case be necessary any time the front or the rear
height is modified
Every time either the front or rear height of the seat
is change, it is necessary to adjust and check the
front fork angle.
To carry out this operation, proceed as follows (figure 48):
Let a 2.5mm pin through the holes of ring "C" and fork axles
Loosen the nut "A" with a 18mm spanner
Now rotate the two rings with tilted base "B" (putting a 2mm
Allen key into the hole) and "C" (that rotates with the fork).
The combination of these two rings, also with respect to the
fork support, makes the correct adjustment possible and it will
be indicated by the spirit level “L” whose air bubble will have
to be within the circle.
Finally, tighten bolt “A” keeping the 2.5mm pin through hole
“C” paying attention to keep the correct angle just reached.
Repeat the same procedure on both forks.
By removing the bolt “A” (figure 48) it will be
possible to remove the complete fork unit.
Fig. 48
