Problems With Freewheel - Bosch Premio EVO Translation Of Original Operating Instructions

9.2.9

Problems with freewheel

Symptom Cause
Cover forgotten after fitting.
Freewheel blocked.
After fitting, socket was compressed by
over-tightening the quick-release axle.
After maintenance: Too much or wrong
grease on the toothed discs.
Toothed discs are worn.
Freewheel does not lock
into place or slips.
One or both springs were forgotten
after fitting.
One or both toothed discs are fitted the
wrong way round after assembly.
Ball bearings are worn.
Hub has axial clearance.
One or both toothed discs are fitted the
wrong way round after assembly.
Ball bearings are worn.
Ball bearings have been driven in too
Hub is stiff when turned. firmly after assembly.
Installation sequence for ball bearings
not observed.
Hub makes noise. Ball bearings are worn.
Cassette caused notches Steel cassette works its way into the
on the freewheel body. aluminium bar on the freewheel body.
Freewheel body is stiff Ball bearings in the freewheel body are
when turned. worn.
Perception of freewheel noise is
Freewheel is too loud or subjective. While some pedelec riders
too quiet. prefer loud freewheel noise, others like
a quite freewheel more.
Table 79: Error solution for freewheel
MY23P0a - 42_1.0_19.10.2022
Troubleshooting, fault clearance and repair
Remedy
 Contact specialist dealer. Check installation correct.
 Contact specialist dealer. Measure the length of the socket. If
the socket is shorter than 15.4 mm, replace socket.
 Contact specialist dealer. Remove hub. Clean and grease
toothed disc.
 Contact specialist dealer. Replace toothed disc.
 Contact specialist dealer. Check installation correct.
 Contact specialist dealer. Check installation correct.
 Contact specialist dealer. Replace ball bearings.
 Contact specialist dealer. Check installation correct.
 Contact specialist dealer. Replace ball bearings.
 Contact specialist dealer. Check installation correct.
 Contact specialist dealer. Check installation correct.
 Contact specialist dealer. Replace ball bearings.
 Contact specialist dealer. Remove notches on the cassette
surface with a file.
 Contact specialist dealer. Replace freewheel body.
 This is not a malfunction. The amount of grease between the
toothed discs may have an effect on the freewheel noise. Less
grease increases freewheel noise but also causes greater
wear.
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