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Changing the all
Every
10.000
km or
so change the oil in the
rear
drive
box. This operation has to be
carried out
when the
011
Ie
still warm and easy to
drain.
Let
all the
old
all
to drain
before introducing fresh
oil.
.A ..
level
Inspection
plug.
,,
8
..
oil filler cap.
"C
..
oil
drain plug.
Required
O.ty
:
It
0,230
oil Agip
F.
1
Rotra
MP
SAE90.
It 0,020
oil Agip
Rocol
ASO/
R.
FRONT FORK LUBRICATION
(see fig
.
356)
To
replace
the lubricating oil in
the
fork
covers
proceed
as
follows:
-
Undo the
drain plugs
.. A,.
with
gasket.
-
Undo the screws ..
8,.
on the
fork
arms.
Before introducing
fresh
oil,
let all
the
old oil
to
drain
.
..
A
..
oil
drain
plug.
.. B,.
oil
filling screw.
Required
O.ty
:
110,120
of Oil
Aglp
F.
1 ATF Oex-
ron
each
cover.
LUBRICATION OF STEERING BEARINGS
AND REAR FORK
In
case of
general
overhauling, it
will
be advi-
sable
take the
conical
bearings
off steering and
rear swinging fork.
Check their condition and
lubricate them with Agip F. 1
grease
30.
CHECKING OIL LEAKAGE BETWEEN
GEARBOX AND ENGINE
To detect all leakages proceed as
follows
:
-
First ascertain if the
oil leaking outside come
from the gearbox
or
from the engine unit. This
is quite easy
to
do by smelling the oil
itself.
As a
matter of fact
the oil coming
from the
gearbox
smells
bad and is more
viscous
(if
checking
is
done with a cold
group)
while the
oil coming
from
the engine unit
is less viscous and
does
not smell.
If
the oil
comes from the gearbox,
the
leakage
may be
caused
by the
following:
1
Poor
sealing
between
clutch pressure plate
rod and
intermediate tube in the clutch shaft;
see
if
the
rod is
very oily and slides
freely
into
the clutch
shaft
(to
ensure
a
proper sealing the
rod must force
on the tube and this
must force
on the
clutch shaft). In
th is case
it
is
advisable
to check
that the
clutch plates are
not
oily.
2
Poor sealing
of
the ring
mounted on
the
gear-
box, flywheel
side.
Check
ring resilience and
wearing and
see
if
there is an oil
drop under
the
ring
itself.
Should
it
be
worn
out,
check the
sur-
face
of
the clutch inner body
contacting the
ring.
Th is surface
must
not be rough and must
not
show
any
crush or score.
3
If
the clutch inner
body contains
oil inside
(where the nut
with
washer securing clutch inner
body
to clutch shaft is locked) check if the two
sealing
rings
on clutch inner body and clutch
shaft have not
lost
resilience and
efficiency
.
4
Porosity
in the
gearbox.
To check
th is ope-
rate
as follows:
-
Set
the
gearbox onto
a
bench,
the
clutch
housing
side
upwards
(fig. 123).
-
Fill the
clutch housing side with water and
blow compressed air at
4
kp/
cm
2
through the
breather tube
..
8
,. (fig. 123).
In
case of casting
porosity small bubbles
will be
visible in the
water.
Seal
by
means of latex or special plasters «Aral-
dite
or
Devcon
"
.
if
the clutch slides
because of
oil
leakages bet-
ween engine
and gearbox
and the oil
passes
between the
clutch pressure
plate rod
and the
intermediate tube and it is
ascertained
that the
oil comes out
from the
engine
crankcase.
this
may be
caused
by the
following
:
5
Oil leaking through
the seal ring mounted
on
the
crankcase
flange.
Check ring
resilience
and
wearing; if worn
out,
inspect
the
crankcase
sur-
face
contacting the
ring
itself.
This
surface
must
be
perfectly smooth.
8
Eventual porosity
in
the
engine
crankcase.
For this
checking
set the
engine onto
a bench.
the flywheel side upwards (see
fig.
122) -
remove
first the flywheel from
the
engine -
and
fill with
water. 810w
compressed
air at 4
kp/
cm' through
the
breather
tube
.. A,.
(fig.
122).
In
case
of ca-
sting
porosity,
small
bubbles will be
visible in
the water. Seal by means
of
latex
or
special
pia-
sters
.. Araldite,.
or ..
Devcon".
7
If the bands securing
the
rubber tubes
of
the
engine oil breather
are
slackened. the oil
may
flOW between rubber and metal tubes and
go
between gearbox
and
engine.
8
See if
the two iower bolts
securing
the
flange,
flywheel
side.
to
the
engine crankcase are dry
;
should
they be
oily, set some
..
Teflon,. tape
on
the
bolt
thread.
9
See that
the lower stud bolt
securing gear-
box to
engine,
left
side,
is not
ally where
the
reference bushing
Is
located
;
otherwise set so-
me
Teflon tape
on the
stud bolt thread.
OIL LEAKAGE FROM THE REAR DRIVE BOX
For this
checking operate
as
follows:
-
Fit
the tool "C" (fig
.
124)
onto
the rear drive
box.
(This
tool
can
be
obtained
from
a used
rear
fork right
arm
by
welding
a plate with
a
valve,
tyre
inner
tube
type,
on
the
arm top)
.
-
Set the
drive box into a
small basin
filled
with
water
and blow
compressed air at 4
kp/
cm
2
through the
valve of
tool
..
C,. (fig. 124).
In case
of
casting porosity, small bubbles will
be visi-
ble in
the
water.
Seal by means
of
latex
or
spe-
cial
plasters
.. Araldite,. or .. Devcon"
.
Check also
that
there is no
oil
leaking between drive box
and lower pin
securing the
rear
fork.
If
the pin
is
oily,
set
some
..
Tefron
.. tape on the pin thread.
181
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