Usage instructions SPEEDY 4all & 4you & 4teen
15
Figure 7: Three positions in the caster fork for posi-
tioning the caster wheel and its effect on the front
seat height
The instructions for disassembly and assembly
of the caster wheels can be found in Chapter
22.1.
17.2.2 Adaptation by replacing the caster
fork
If the adjustment range of the existing caster
fork is insufficient, the next larger or smaller
one can be used.
In doing so, the bottom position of the fork size
1 is equivalent to the top position of fork size 2
and the bottom position of fork size 2 to the top
position of fork size 3.
Figure 8: Caster fork sizes with marking of the same
seat height settings with different caster fork sizes
The instructions for replacing the caster forks
can be found in Chapter 22.3.
17.2.3 General instructions
When changing the angle of seat or front seat
height each time:
the wheel track of the drive wheels must
be checked and readjusted if necessary
(see Chapter 21.2).
the caster wheel axles must be readjusted
(see Chapter22.4).
the backrest angle may have to be reposi-
tioned (see Chapter 18.1).
make sure that there is sufficient clearance
under the footrest. Experience shows that
this should not be less than 4 cm (see
Chapter 23).
if necessary, the height of the anti-tipping
support may have to be readjusted (see
Chapter 24.3).
Top position
Middle position
Bottom position
Angle of
seat/front
seat height
increase
Angle of
seat/front
seat height
reduce
Size 3
185 mm
Size 2
155 mm
Size 1
125 mm
125 mm
