3. Adjusting the castor fork angle
This adjustment is necessary if the seat height/centre of gravity
has been changed, or the directional stability has been adjusted.
WARNING: an incorrectly adjusted castor fork angle may cause
the castors to wobble, and lead to the user falling or severe
injuries.
NOTE: setting the fork to toe-out (fork is inclined towards the
back in the direction of travel) will increase the probability of the
castors wobbling. Setting it to toe-in (fork is inclined towards the
front in the direction of travel) can reduce the probability of the
castors wobbling. The angle of the castor fork is set by the
factory with a slight toe-in.
Loosen the Allen screws (A) (Fig. 6). The castor fork angle can
now be adjusted to the front (toe-in) or to the back (toe-out).
To ensure that the castor fork is in an exactly horizontal position
(90° to the floor, neither toe-in or toe-out), you will need a setting
gauge (e.g. 90° flat angle, set square). Rotate the castors in the
travelling position and place the setting gauge on the flat front
side of the fork (Fig. 7). The castor fork will be at an angle of 90°
to the floor when the setting gauge covers the entire surface.
If you want to set the fork slightly to toe-in, e.g. to prevent the
castor fork from wobbling, set the angle so that a slight light gap
can be seen between the setting gauge and contact area.
When you have set the correct position, tighten the allen screws
(A) using the following procedure:
Tighten the outer allen screw first to a torque of 7Nm, than
tighten the inner allen screw to a torque of 7Nm.
Repeat this procedure up to 6 times until both allen screws are
evenly tightened to a torque of 7Nm
A A
Fig. 6
English
4. Replacing the castor fork
•
Remove the locking clip (A) at the lower end of the castor
axis (Fig. 8)
•
Remove the nut (B) with a 13 mm open-end or ring spanner
•
Now replace the fork
•
Reassemble by following the instructions in reverse order.
Observe the nut's tightening torque of 10 Nm (B)
B
B
A A
90
90
O O
Fig. 7
4
Fig. 8
Rev.C