Operating instructions SPEEDY 4all & 4you & 4teen
27
21.2 Checking and adjusting the wheel
tracking of the drive wheel
Well adjusted wheel tracking significantly
improves the easy running characteristics of
the product. To
check
the tracking, proceed as
follows:
Position the product on a flat surface and apply
the parking brake on both sides.
Measure the axle heights (from the ground to
the drive wheel axle) and write this dimension
onto both tyres at front and back.
Figure 66: 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 67: 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 68: Drive wheel bushing and aluminium,
locking nut, product view from behind
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
bushing in the direction of travel, the track
at the front will become more narrow.
When turning against the direction of
travel, the behaviour is exactly the
opposite.
3. Make sure that the distance at the front to
the frame on the right and left is the same.
•
Axle height
Markings
Distance
Drive wheel bushing
Aluminium locking nuts
Drawing the axle height onto tyres
