Hub; Plastic Parts; Crank Adjustment - BERG Duo Chopper Frame BF Manual De Usuario

Tensioning the front chain:
• Loosen the bolts on the underside of the frame.
• Tension the chain by moving the crank axle forwards.
• Tighten the bolts again. It must be possible to push the middle of the chain downwards by 10 milli-
metre. To check this you must remove the lower half of the chain housing.

3.2.4.2 Crank adjustment

After using the new product for several days (intensive use) or for up to two weeks (normal use) after
purchase, the mounting bolts with which the left and right cranks are mounted must be tightened
again (see illustration below). Note that they must be 'hand tightened', that is to say with a tightening
moment of 30 Nm at the maximum (it is a normal effect that after a short period of use, as a result of the
force applied to the pedals, the crank assembly settles). An effect when this isn't done regularly, is that
a certain amount of play can occur, which can lead to damage to the crank and the crank axle. This play
can be taken up by tightening the bolts further.

3.2.4.3 Hub

The brake freewheel works like a back-pedaling brake and has a neutral. The tension of the chain has to
be checked every six months.

3.2.5 Plastic parts

The plastic and/or wooden parts must be checked regularly for damage and breakage. In the case of
breakage you must immediately replace the part concerned with an original part, in order to guarantee
the safety of the user.
Duo Chopper Frame BF
15