Operating instructions LITTY 4you
14
may not be more than 5 mm larger that at
the front.
Figure 20: Distance between the markers on the
tyres (at axle height), back
5. If all the distances are correct, then use an
open-ended spanner (AF 22 mm) to hold
the drive wheel bushing in position and
tighten the aluminium locking nut (AF 41
mm) with a tightening torque of 70 Nm.
17.3 Air pressure
Check the tyre pressure at regular intervals
and after being subjected to extreme tempera-
tures. The maximum and if applicable, mini-
mum tyre pressure is printed on the side of the
tyre.
If the tyre pressure is too low, then optimal
functionality of the knee lever brake is not en-
sured. Apart from that, there is an increased
risk of a flat tyre.
The tyre pressure increase with the tem-
perature. If the pressure is too high, the tyre
may burst. For this reason, wheelchair tyres
may not be exposed to unusually high tem-
peratures such as in a sauna or under glass in
the summer.
17.4 Other
If tyres, inner tubes or hand rims need to be
replaced, please contact your specialist re-
tailer.
18 Caster wheels
18.1 Replacing the caster wheels
To
remove
a caster wheel, unscrew the M6
axle fixing screw (AF 4 mm) out on one side.
Figure 21: Axle fixing screw on caster wheel axle
Figure 22: Caster wheel with aluminium axle
Now you can see the aluminium axle with a
hexagon socket (AF 4 mm). This hexagon
socket is used to fix the axle in place, while the
second axle fitting screw (AF 4 mm) (Fig. 21) is
unscrewed. To do this, insert the Allen key (AF
4 mm) into the hexagon socket on the alumin-
ium axle and hold it still. At the same time,
unscrew the remaining M6 axle fixing screw
(AF 4 mm) on the other side.
When
attaching
the caster wheel, proceed as
described above in reverse order. The tighten-
ing torque for the axle fitting screw (AF 4 mm)
is 7 Nm. The axle fitting screws need to be
secured with thread lock fluid.
M6 axle fixing screw
Aluminium axle with
hexagon socket
Markings
Distance