Usage instructions for NJ1 adaptive bike
21
Figure 36: Aluminium bracket as a parking brake
A
mechanical disc brake with a locking lev-
er
is possible as an option for the parking
brake. The brake is lifted or released by turning
the lever. The lever always maintains the set
position. If the brake was applied while station-
ary, it must be released before starting the trip.
Figure 37: Parking brake via locking lever
19.5.4 PRO ACTIV back-pedalling brake &
crank release function
The PRO ACTIV back-pedal brake can be
used for chain gears or hub drives with a free-
wheel.
The PRO ACTIV back-pedalling brake is a
closed hydraulic system consisting of a gener-
ator unit and a disc brake calliper. The system
has automatic wear compensation for the
brake pads.
The back-pedalling brake is delivered with a
crank release function that allows reverse driv-
ing and manoeuvring via the hand rims. As:
For functional reasons, the back-pedalling
brake always acts as soon as the product
moves backwards. Therefore, the user must
“unlock” the reverse movement first by operat-
ing the crank release function.
The braking function via the backward move-
ment (crank movement against the direction of
acceleration) is always guaranteed – with the
crank release function activated or deactivated.
The
braking force applied
is adjusted by the
strength of rotating the cranks backwards. The
braking force applied is adjusted by the
strength of rotating backwards.
The
crank release function
is operated by
pressing the side pressure plate. To activate
the crank release function, the left-hand pres-
sure plate must be operated (seen from the
direction of travel). To return to normal driving
operation with the back-pedalling brake, the
right-hand pressure plate must be operated.
Figure 38: Left- and right-hand pressure plates
Note:
The crank release function can also be
selected in combination with the Shimano
Nexus hub gears (which already have back-
pedalling brakes) so that it is possible to re-
verse and manoeuvre via the handrims. The
back-pedal brake is implemented here via the
hub gear. In this case it must be ensured that
the hub gear's back-pedal brake is not opera-
tional when the crank release function is acti-
vated. If you want to brake with the activated
crank release function, this is only possible via
the additional braking system such as a rim
brake.
Before every trip, test the brakes by mov-
ing the cranks with the normal operating force
in the direction opposite to acceleration. The
drive wheel must not be able to move when the
system is operated.
Aluminium bracket as a parking brake
Deactivating the
crank release
function
Activating the
crank release
function
