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186
OPERATION
No.
ID
39 1
- 0 : Checking rhe pressure reserve units
ID
19
18
19
20
21
22
23
24
ADJUSTING
THE
POSITION
OF
THE
SUSPENSION
PUMP
This operation
must be carried out if an engine or crankcase has been replaced (see Pl.20).
Remove
the
air
filter
andthe
rocker
cover
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn
the
crankshaft
so that
the
valves
on
the
4th
cylinder
are
rocking,
i.e.
inlet
valve
beginning
to
open
and
exhaust
valve
almost
closing
Mount
a dial
test
indicator
fitted
with
probe
(A)
on
the
bar
(B).
Place
the
bar
fitted
with
the
dial
test
indicator
on
the
bush
(C)
(use
setting
fixture
1693-T
fitted
with
a dial
test
indicator
2437-T,
see
P1.20,
fig.
1) and
place
this
assembly
on
a surface
plate.
Load
the
dial
test
indicator
(6
mm
approximately)
and
set
the
zero
mark
on
the
movable
dial
opposite
the
big
pointer
Note
the
position
of the
small
pointer
(totalising
needle)
e.g.
between
3 and
4
. . . . .
. . . . . . . . . . .
. . . . . . . . . . . . . .
Place
the
bar
fitted
with
the
dial
gauge
on
the
face
of the
crankcase
which
receives
the
pump
(see
fig.
2).
Facing
the
engine
turn it clockwiseuntil
the
pointer
of the
dial
gauge
changes
its
direction
of
rotation.
NOTE
- If the
engine
is
rotated
by
more
than
a quarter
of a turn
in
either
direction,
the
eccentric
would
damage
the
dial
gauge.
Return
th,e.
pointers
to
the
position
they
had
in
paragraph
3 (in
the
example
chosen:
small
pointer
between
3 and
4,
big
pointer
opposite
zero)
by
pulling
on
the
probe
of the
dial
gauge.
Release
Blowly
the
probe
of
the
dial
gauge
and
count
the
number
of turns
and
fractions
of
a turn
revolved
by
the
large
pointer,
until
the
moment
when
the
tip
rests
on
the
high
pressure
pump
operating
cam.
Example:
the
big
pointer
revolved
4.42
turns.
The
dimension
"a"
to be
obtained
between
the
pump
mounting
face
and
the
operating
cam
is
40
* 0.1
mm
(see
fig.
3),
the
bush
(C)
being
at
a height
of
22 mm.
.I
The
paper
gaskets
(2)
between
the
pump
and
the
spacer
and
between
the
crankcase
and
the
spacer,
when
compressed,
have
an
average
thickness
of
0.17
mm.
It will
therefore
be
necessary
to
place,
between
the
pump
mounting
face
and
the
respective
face
on
the
crankcase,
a spacer
having
a thickness
"b"
= 40
mm.
minus
the
thickness
of
the
paper
gaskets
(0.17
x 2 = 0.34
mm),
the
dimension
measured
in
paragraph
5 (4.42
mm)
and
the
height
of the
bush
(C)
(22
mm).
In the
example
selected,
"btl
= 40
- (0.34
t 4.42
t
22)
= 40
- 26.76
= 13.24
mm
TOOLS
12- ,17
mm
box
spanners
Setting
fixture
1693-T
Dial
gauge
2437-T
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