Brompton Bicycle Owner's Manual download pdf (Page 13)

SECTION F: RUNNING ADJUSTMENTS & CHECKS.

It is important that certain of the jobs listed here are carried out at leas

once, if not two or three times, during the first few hundred miles of use

when parts are bedding in (see chart on c

entre page). Thereafter, except

tly. for brake adjustment, they need to be carried out less and less frequen

If you are not confident about carrying out these jobs yourself, your dealer

can help.

Hub Gear adjustment:

fig AR6

hat the gear you select by moving

you cannot obtain a satisfactory setting, then the most likely cause is

ither the cable not running freely, or damage to the indicator chain itself,

ening the

lock nut N, turning the barrel B until the correct

setting is obtained, and relocking the nut N, fig

AR6.

Engage top gear, then move the control

trigger to the middle position: the step, S (fig

AR13), towards the end of the indicator rod,

IR, should be level with the end of the axle,

visible through the hole in the CTN. Next,

select bottom gear, then middle, then top, and

check that all three are engaging correctly.

Adjustment of the gear control must be carried out with the bike fully

unfolded (i.e NOT parked), and with the indicator rod screwed fully home

into the hub (and backed off not more than half a turn to align with the

cable). The aim is to make sure that the indicator rod & chain down at the

rear axle moves to the correct position in response to moving the trigger.

For this the cable has to be running well: it must be free of kinks or sharp

radii, with the cable pulley rolling freely.

While setting gears, you should ensure t

the control trigger has indeed engaged in the hub, and to this end, each

time you are moving the trigger, keep the wheel spinning forwards, and

pedal back & forward, to ensure the gear engages. It's easiest, when

actually altering the setting, to have the cable slack: so select top gear and

back & forward pedal a bit first.

where it runs into the axle end. Otherwise, the fault may be with the hub

internals.

STURMEY ARCHER 3-spd gear adjustment:

Adjustment is carried out by slack

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Brompton Bicycle Owner's Manual Page 13