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wheel in a different wheel position on the
caster wheel fork (in doing so, the front
seat height or the angel of the seat
changes, see chapter 18.2). Another op-
tion would be to tilt the caster wheel axle
(see chapter 23.4) from the vertical posi-
tion in the lower area in the direction of
travel. The inclination of the caster wheel
axle can be adjusted up to approx. 4 mm
over the length of the caster wheel bearing
block from the vertical position. This in-
creases the castor length and the tendency
to vibrate reduces.
Caster wheel for rotary axle tilted
maximum in the direction of travel
Wheel contact
point
Increased castor length
Figure 87: Increased castor length via the inclination
of the caster wheel for rotary axle
23.3 Replacing the caster wheel forks
A distinction needs to be made between the
caster wheel forks with a screwed axle and
those with a quick-release axle.
33
Operating instructions TRAVELER 4all Ergo & 4you Ergo
max.
4 mm
23.3.1 Caster fork with screwed axle
To remove the caster fork with screwed
axle, first the aluminium cap on the caster
wheel bearing block must be removed. In order
to release the cap, you can run under the cap
using a commercially available cutter knife and
lift slightly at several points. Then the M12 nut
(AF 19 mm) is loosened using, e.g., an AF
19 mm socket. Now the caster wheel for rotary
axle can be pulled out from under the caster
wheel bearing block.
Aluminium cap
Figure 88: Aluminium cap
M12 nut
Figure 89: Aluminium cap removed and M12 nut
visible
To assemble the caster fork with screwed
axle, this is inserted into the caster wheel
bearing block with the caster wheel for rotary
axle. Then the M12 nut (AF 19 mm) is tight-
ened again to 3 Nm and secured with thread
lock fluid. Then the aluminium cap is pressed
back onto the caster wheel bearing block.
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