TRAVELER 4all Ergo & 4you Ergo usage instructions
31
Figure 71: Tetra Clip with opened quick release
axle, drive wheel can be removed
22.2 Checking and adjusting the wheel
tracking of the drive wheel
The following instructions are intended
for and may only be carried out by a rehabilita-
tion specialist dealer or PRO ACTIV
Well adjusted wheel tracking significantly im-
proves the easy running characteristics of the
product. To
check
the tracking, proceed as
follows:
Position the product on a level surface and
secure the product against rolling away.
Measure the axle heights (from the ground to
the drive wheel axle) and write this dimension
onto both tyres at front and back.
Figure 72: Drawing the axle height on the front and
back of both tyres
Afterwards measure the distance between the
drive wheels front and back at the height of the
axles along the markers. Ideally, the distance
between the two drive wheels should be the
same size at the front and back. In general it
can be said that the distance between the drive
wheels at the front may not be larger than at
the back. Apart from that, the distance at the
back may not be more than 5
mm larger that at
the front. If this is not the case, the wheel
tracking needs to be corrected.
Figure 73: Distance between the markers on the
tyres (at axle height), back
To
adjust the track
proceed as follows:
1. Loosen the aluminium locking nuts on both
sides (AF 41 mm).
Figure 74: Drive wheel bushing and aluminium lock-
ing nut (bottom view)
2. Correctly adjust the track by turning the
drive wheel bushing (AF 22 mm). Here it
can be said that: If you turn the drive wheel
bushings in the direction of travel, the track
at the front will become narrower. The ex-
act opposite occurs if you turn it opposite
to the direction of travel; the track becomes
wider.
•
Drawing the axle height onto tyres
Axle height
Markings
Distance
Aluminium locking nuts
Drive wheel bushing
Red marking = drive
wheel can be removed
