Operating instructions LITTY 4you
19
It can become necessary to adjust the brake
for various reasons:
You have changed the tyre or the tyre
pressure.
You have changed the wheel tracking of
the drive wheels.
The brake is pulling unevenly or insuffi-
ciently after extended use.
To adjust the knee lever brake, proceed as
follows:
1. Loosen the M5 fixing screws (AF 4 mm)
which are used to attach the brake to the
brake mounting bar on the brake mount.
Figure 35: Bottom brake mount
Figure 36: Brake mount and brake mounting bar
2. Position the open brake so that there is 2
mm clearance between the brake bolt and
tyre up to a maximum of 4 mm. You can
use the adjustment range provided by the
slots on the brake mounting bar.
Figure 37: Distance between brake bolt and tyre
from 2 mm to maximum 4 mm, with opened brake
3. Tighten the M5 fixing screws (AF 4 mm)
again using a tightening torque of 4 Nm.
4. Check that the brakes are adjusted cor-
rectly: On a slope (7° gradient), the wheel-
chair should stand firm with the brake ap-
plied. This will happen if with the brake ap-
plied, the tyre is depressed or deformed by
approx. 4 mm. When the brake is not ap-
plied, the brake bolt may not drag along
the tyre.
5. Retrospective fine adjustments can be
made at any time using the infinitely ad-
justable adjustment screw on the lower
mount of the wire rope. To do this, open
the lock nuts (AF 8 mm) and unscrew the
adjustment screw. This will tension the
wire rope until the required distance be-
tween the brake bolt and the drive wheel is
reached. Then tighten the lock nuts again
with a tightening torque of 4 Nm.
Figure 38: Fine adjustments to the brake using the
adjustment screw on the lower mount for the wire
rope
M5 fixing screws
Brake mounting
bar with slots
Brake
mount
Lock nut
Adjustment
screw
