Sprockets And Chain; Hubs - DAHON Folder 1987 User Manual

B.
Adiustment, Trouble
Shooting and Maintenance
For
adjustment, care and
lubrication
of
the
bearing head set
(5-200),
heed
the
same
points
mentioned concerning
the bottom
bracket bearing set in
Scc.
6.3.1 B.
of this
manual.
lf
bearings
are
in good working condition
and
the
brace
(see
Scc.6.3.10)
is
properly
adjusted, there should bb
no
movement
in the
steering column
base
when
the
handlebar brace is
fastened.
lf
play or
gaps exist,
check
to make
sure
that the
base
pin
(5-330) is
in
its proper place, spring
pin
C-clips
(5-322)
are
securely fastened, and lock
nut
(5-340) is tightened.
lf
the problem
continues,
check
and
replace bent
or worn
parts, such
as
the
base
pin,
steering coupler,
steering
column or
front
fiame.
\
6.3.10
Sprockets
and Chain (Chainwheel, Rear Cog, Chain Guards,andChain)
A.
Disassemblv
Use
chain breaker
to
remove the chain.
To
remove the
chainwheel,
first
disassemble
the the right crank assembly (sccScc. 6.3.3). Slip the chainwheel
off
of
the
axle. Unscrew and detach
the outer chain
guard (T-310)
and then
the
Ttt0
410
rso0
B.
Adjustment, Trouble Shooting and Maintenance
By adlusting
the
position
of
the
rear wheel axle, the chain should
be
ad-
justed to
a
point
where
it
is
not
so loose
that
it
sags
or derails easily,
but
not
so
tight rhat pulls
exccssively
on
sprockets
(about
%
inch
slack
at midpoint).
Check
the
chainwheel
and rear cog
to
be sure
that they
are
not bent. lfone
of
the sprockets is bent, replace
it or,
if
the deformation
is
not too
severe,
take
it
to
a bicycle dealer
to
be
straightened.
lf
the chainwheel and cog
are
not in
line,
make the
necessary
hub
(seeScc.6.3.13) or right crank (seeScc.6.3.3)
adjust-
ments.
lf
problem
persists, there is a
possibility that the rcar
frame
is
out of
alignment
and
your bicyole
should
be
taken
to
a dealer
for
needed servicing.
<:rn*,
31
32
Always
be
certain that
chain
guards are securely fastened
to
the chainwheel.
lf
either the inner
or outer chain guard
becomea
unevenly
spaced
with
the chain-
wheel,
bent,
cracked,
or
otherwise damaged,
replacement
of
the
damaged or
vrlorn
item
is
mandatory.
Caution: Chain guards are constructed
of
plactic and
care should be taken
so
that they are not damaged.
With the chain
on,
hold the
rear
wheel and
put
pressure on
the pedals. Note
the
position of
the
chain
on the teeth.
lf
the teeth
are
worn excessively,
or if
the
chain is
worn
and stretched,
you will
note that the chain rides high
on the
teeth,
rather than lying
in
the
bottom of
the
tooth
spaces.
The rear cog can be checked
at the
same
time.
lf
it
is
determined that the chain
or
sprockets are
worn,
or
if
any
teeth
or the body
of the
cog
or
chainwheel is
bent,
it
is
necessary
to
replacc
darnaged
or worn parts.
lf
the
above
condition is due
to
excessive
wear, the
chain and sprockets should be replaced together.
The chain should be cleaned
and lubricated at
least
once every 2 months
and more often
if
adverse
weather
or riding
conditions are
often
encountered.
Oil should be placed between inner and outer plates
of
the chain.
An efficicnt
method
of
lubricating the chain is
to
remove
it,
clean
it
thoroughly, and Iubri-
cate
it with
SAE 20 oil.
6.3.11 Hubs
Inner hub
parts
are a precise combination
of
delicate
components.
lf
there
is
any
doubt
concerning
your
hubs, take
your
bike
to
a professional dealer for
servicing.
For
a
3-speed
version, the
re-ar
3'specd goar
tnrb,
however,
may require
some
adjustments which
can be performed by
closely
following the
steps listed
below.
(1)
First set trigger lever
at
posi-
tion
No.
3
of
gear speed indica-
tor
.(Fig.
1
)
(2)
Cfrcct that the
cable
nipple
is
placed
in the
groove
properly.
(Fie.
1)
(3)
Tighten
guide
nut. (Fie.2)
(4)
Insert coupling
rod
through
axle hole and
turn it
clockwise
until it
stops.
Then loosen
it
by
/z turn
to
assu
re a
smoother
speed change.
Failure
to
do
this
will
result
in
the
chain
';--/,)
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