Brompton Bicycle Owner's Manual download pdf (Page 14)

fig DR16

It’s important that you have the

correct indicator rod. For Sturmey

Acher 3 speed hubs, with alloy

shell, post 2004, the correct

indicator has two marks (2 short

parallel lines on indicator rod).

fig AR13

fig DR16

Derailleur maintenance and adjustment.

For satisfactory gear changes and smooth running, two stops need correct

fig DR17

fig DR9

rs on the chain tensioner.

l, without any rubbing pressure while the idler rotates (to give the

lickest change with

inimum wear): when the

casional

upright OU has to just not

rub on the idler, and the

rear stop screw L is used

for adjustment.

setting, and two key elements of the system have to move freely: the

actuator (or "chain-pusher"), and both idle

Chain pusher

adjustment.

Use the stop screws, fig

DR9, on the chain

pusher. The idea is that,

in high gear, the inner

face of the inner upright

IU, fig DR16, shall be as

close as possible to the

idler whee

setting is right, you should

just be able to see daylight

between the two while

turning the cranks forwards,

perhaps with oc

contact. Use a 2mm hex key

in the forward stop screw H

for adjustment.

The same principle applies

for the lower gear setting,

only this time, fig DR17, the

inner face of the outer

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Brompton Bicycle Owner's Manual Page 14

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