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152
OPERATION
No.
ID
330-3
: Overhauling
the geavbas
ID
19
22
To
adjust
the
position
of
the
driving
pulley
(see
Pl .58):
4
Use
the
fixture
1683-T.
Fit
the
gauge
pin
bracket
(B)
with
the
face
marked
"2
pulleys"
towards
the
front,
and
fit
the
bracket
on
the
boss
provided
for
fixing
the
high
pressure
pump
on
the
DS.
19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . .
b)
Place
the
rod
(A)
with
the
ball
end
resting
on
the
lateral
faces
of
the
driving
pulley
groove,
and
the
rod
itself
bearing
on
the
gauge
pins
(C)
in
the
zones
"f"
and
"g".
NOTE
- If the
pulley
is
correctly
aligned,
with
the
rod
bearing
on the
gauge
pin
at
"g"
the
gap
should
be
0.45
f
0.25
mm
in
the
zone
"f".
4
Using
a set
of
feeler
gauges,
measure
the
gap
between
the
gauge
pin
and
the
rod.
1st. case:
The
rod
bearing
on
the
gauge
pin
at
"f".
Reduce
the
thickness
of the
pulley
adjusting
washers
by
three
times
the
amount
of
the
gap
"d"
measured
at
"g",
plus
0.45
x 2 = 0.90
mm,
in
order
to
obtain
a gap
of
0.45
f 0.25
mm
at
"f".
The
pulley
is
then
adjusted
correctly.
Example
1 -
Gap
"d"
measured
at
"g"
= 0.3
mm.
It
will
be
necessary
to
reduce
the
thickness
of
the
pulley
adjusting
washers
by
(0.3
x 3) t (0.45
x 2)
=
0.90
t 0.90
= 1.80
mm.
2nd. case:
The
rod
bearing
on the
gauge
pin
at
"g".
If
the
gap
measured
at
"f"
is
greater
than
0.45
2 0.25
mm,
it
will
be
necessary
to
increase
the
thickness
of the
pulley
adjusting
washers
by
twice
the
difference
between
the
gap
measured
and
0.45
mm.
Example
2 -
Gap
I'd"
measured
at
"f"
= 0.80
mm.
It
will
be
necessary
to
increase
the
thickness
of the
pulley
adjusting
washers
by
(0.80
- 0.45)
x 2 = 0.35
x 2 = 0.70
mm.
3rd. case:
If
the
gap
"d"
measured
at
"f"
is
less
than
0.45
f
0.25
mm,
it
will
be
necessary
to
reduce
the
thickness
of
the
pulley
adjusting
washers
by
twice
the
difference
between
0.45
mm
and
the
gap
measured.
.C
Example
3 -
Gap
"d"
measured
at
"f"
= 0.25
mm.
It
will
be necessary
to
reduce
the
thickness
of
the
pulley
adjusting
washers
by
(0.45
- 0.25)
x 2 = 0.20
x 2 = 0.40
mm.
d)
Remove
the
pulley.
Remove
the
washer
or
washers
and
measure
the
thickness
and
select
one
or
more
washers
of
suitable
thickness
from
those
sold
by
our
Spare
Parts
Department.
e)
Fit
the
adjusting
washer
or
washers,
the
key
and
the
pulley.
Tighten
the
screw
fixing
the
pulley
(spring
washer
underthehead)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
f 1
Remove
the
gauge
pin
bracket
(B).
TOOLS
Fixture
1683-T
14 mm
box
spanner
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