Usage instructions SPEEDY 4all & 4you & 4teen
39
Figure 102: Increased caster length via the inclina-
tion of the caster wheel axle
22.3 Replacing the caster forks
A distinction needs to be made between the
caster forks with a screwed axle and those with
a quick-release axle.
22.3.1 Caster fork with screwed axle
The following instructions are intended for
and may only be carried out by a rehabilitation
specialist dealer or PRO ACTIV
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.
Figure 103: Aluminium cap
Figure 104: 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.
For the rotary axle to run smoothly, the M12
nut must not be tightened to more than 3 Nm.
In case more sluggishness is desired, this can
be achieved using a higher tightening torque.
22.3.2 Caster forks with quick-release axle
The
caster fork with quick release axle is
removed
using the locking knob on the inner
side of the caster fork. Grasp around the caster
fork and press the locking knob with your
thumb. The caster fork can now be pulled out.
M12 nut
Aluminium cap
Increased caster length
Wheel contact
point
Caster wheel for rotary axle tilted
maximum in the direction of travel
Max.
4 mm
