49
SUSPENSION BLOCK AND BUSH
Check the bush and suspension block for wear annually. If you
notice any cracks in the suspension block, have it replaced immediately.
WHEEL RIMS
The Braking surfaces of the rims wear with use. As the rims wear a
void in either side of the braking surface will appear. At this stage the rim should be
replaced. Look for this symbol on the wheel rims.
100-MILE SERVICE
Certain items on any bicycle take time to bed in; to avoid damage, these need
attention soon after you have bought the bike. The dealer that sold you your bike will be happy to perform
this first important service without charge, but it must be redeemed within three months of purchase. They
will pay particular attention to the following items:
SPOKES
The tension of the spokes should be checked and adjustments made to suit. If a spoke becomes
loose for any reason, neighbouring spokes will be carrying extra load and may fail.
CRANK AXLE BOLTS & PEDALS
These must be checked for tightness. The correct torque is 30Nm; the
thread for the LH pedal is left hand.
CABLES
Although the brake and gear cables are pre-stretched, inevitably there is further initial stretch. As
this affects hub-gear control, the gears should be checked for correct adjustment. It’s well worth setting the
brakes at the same time.
SEATPOST SLEEVE
The seatpost slides up and down in a plastic sleeve inside the frame, this is a wearing
part that will need replacing periodically. If the seatpost is slipping when riding or the seatpost quick release
clamp nut has to be over tightened to clamp the post it could be that the sleeve is worn excessively and
needs replacing. The worn sleeve can eventually cause damage to the frame itself if not replaced. Replacing
the sleeve requires specialist tools and should be done by an authorised Brompton dealer.
REAR HINGE
Over time the bushes in the rear frame pivot can wear, slight play will become detectable. In
order to remove the play the bushes need to be replaced. This work should be undertaken by an authorised
Brompton dealer, specialist tools are needed to carry out the work.
HINGE CLAMP PLATE
If the plate is worn or damaged it could reduce the effectiveness of the hinge
clamping and should be inspected regularly and replaced when needed. The gap between the hinge
castings and the hinge clamp plate (fig. 50) when the lever is tightened, on both the handlebar hinge and
the mainframe hinge should measure between 0.90mm to 3.00mm. These parts should be checked regularly
and replaced when necessary.
If the gap between the hinge and hinge clamp plate is less than 0.90 mm (fig. 51) replace the hinge clamp
plate. The bike should not be ridden if there is no gap between the hinge clamp plate and the hinge, until
the plate is replaced.
PLATE
Fig. 50
0.9 mm - 3.0 mm
0.0mm - 0.9mm
Fig. 51
HINGE
