6.3 Servicing Guide; Brake System - DAHON Folder 1987 User Manual

Caution: When using an adjustable
wrench,
make sure
wrench,
wrench jaws are tight
in
order
to
prevent
damage
to bolts and nuts.
Right
6.2
Nut dnd
Bolt Tightening Guide
Nuts and
bolts
must be
adequately tightened
for
strength and
security, but
not
overtightened
to the
point of failure, or
crdshing
or
expanding tubes. The
length
of
wrench,
times the force
applied
at
the end
of
the wrench, gives the
torque applied
measured
in inch-pounds.
Typical Examples:
8mm
or
5116"
thread:200-200
f
N-f
BS.9.5mm
or 318":250-280
112" Pedal
Thread: 260-280
9 11
6"
Pedal Th read
: 450-500
6mm Brake
Bolt:
150-170
Figure for
the
required force
(W)
is to
be
known In relatron !o
the length of wrench
5mm
Brake Cable
and Shoe: 120
7mm
Crank
Cotter Nut:180-1
90
20
Front
WheeJNr+t:20o-220
ro
Rear
Wheel
Nut:
250-280
i
4 5 6 t
g
9 ro
i
To prevent nuts and bolts
from coming loose.
"Locktite"
bond has been
used
wherever
appropriate
on
your
factory-built FoLDER
After you
have tigh-
tened
any nuts and bolts,
for
utmost safety,
it
is stronS,lv recommended
that
vou do the
same.
6.3 Servicing Guide
The following sections
include detailed
informatiott
needed
for
the
disas-
sembly, maintenancc,
adlustment, trouble shooting
and reparr
of
the
DAHON
Folder.
Detailed
sketches have been
provided, while reference
to
the exploded
vrew
of the entire bicycle is available
ln section 8
of
this manual'
Caution: Do not
attempt
to
disassemble,
adiust,
or
repair parts
without first
having adequate
tools and mechanical
background'
6.3.1
Bottom Bracket
Crankshaft Assembly
A.
Disassembly
To
disassemble,
use
lock
ring
pliers
to
remove the right lock
ring
(A-210). Then
remove the
bearing
race
(1,-220) with
a
special bearing
ffinS
vrl
A3i0
4330
moved
from
the
right
side.
0
I
A'210
60
50
40
30
To
assemble,
reverse
the
above
order.
Make
sure
that
bearinls
are
properly
lubricated
(use wheel
bearing grease) and that the
bearing race
(A-220)
has
no
side
wobble but
can
rotate with little
resistance.
B.
Adjustment, Trouble Shooting
and Maintenace
A poorly
adjusted bearing
race
(1,-ZZ0) can
hinder the
axle,s spinning
ability
or
cause
it
to
wobble. Avoid
excessive
or
uneven wear of
axle assembly by
first
loosening
outer
lock
ring(e-210),
properly adjusting inner bearing
race
(A-220),
and retightening lock ring while
making sure
not to
change the setting
of
the
bearing race,
Lubrication
of
these bearings is also very important
as
dirt, grime or
worn
bearing
grease
can
cause
damage to
bearing races. Each time this
assembly
is
dis-
mantled,
all parts
shou14
bc thoroughly
clea-ned
and dried and
re-greaserl. This
process should
be done
at
least once every 6 months, or
sooner
if
there
is any
grinding or tight
movement
after proper adjustment.
lf
excessive
looseness
or
tightness exist after parts are
lubricated and adjust-
ed, one
or
more
of
the foremented parts is
damaged and should be replaced at
once. Failure to
replace a
worn part will
accelerate wear
of other
inner-working
bottom bracket parts.
6.3.2
Brake System
The brakes are one
of
the most important parts of your
bicycle. To
be sure
that the
brakes
work well
when
you
really
need
them, perform all
the adjust-
ment
steps
in this
section exactly
as
instructed.
warning:
lf
brakes
do not work well
after
making the
following
adiustments,
have
brakes repaired or
replaced at
a
bicycle
service shop.
DAHON Folder
uses
the two
typ€s
of
caliper
brakes
-
in
the front
brake
is
a
side-pull caliper
brake,
on the
rear
is a
cenrer.pull caliper
brake (Fig.
1)
19
20