TRAVELER 4all Ergo & 4you Ergo usage instructions
36
Figure 90: M6 axle fixing screw of caster wheel axle
(view from outer side of product)
Figure 91: M6 caster wheel axle nut (view from inner
side of product)
Figure 92: Caster wheel with aluminium axle
Figure 93: Spacer on the caster wheel
When
mounting the caster wheel
, position
the caster wheel with its spacers in the caster
wheel fork, hold it in position and insert the M6
axle fixing screw with its washer from the out-
side of the product to the inside through the
axle of the caster wheel. Now attach the wash-
er and the M6 nut (AF 10 mm) from the other
side. The tightening torque of the axle fixing
screws (AF 4 mm) is 7 Nm.
23.2 Caster wheels flapping
Uncontrolled swivelling backwards and for-
wards of the caster wheels around their axes
on the caster fork (while moving) is known as
"fluttering".
If the caster wheels start to flutter, imme-
diately reduce your speed to prevent the caster
wheels from jamming sideways and therefore
reduce your risk of falling.
The
speed limit
at which caster wheel flutter-
ing starts,
is reduced by
:
increasing size of the caster wheels
increase weight of the caster wheels
falling load on the caster wheels
decreasing caster length of caster wheels
The following options are available to
coun-
teract caster fluttering generally
:
Fluttering can be reduced by
reducing the
caster wheel diameter
. This means in-
stalling a small caster wheel in a different
wheel position in the caster fork (seat
height therefore does not change) would
be one way of reducing fluttering. Howev-
er, please note that using a smaller caster
wheel makes it more difficult to overcome
obstacles and makes tipping necessary
more often. The smaller the caster wheel
is, the more driving skill is required.
Another option for reducing fluttering is to
use a
lighter caster wheel with the same
diameter
or, as described above,
with a
smaller diameter
.
M6 axle fixing screw
with washer
M6 nut with washer
Spacer
Aluminium axle
