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Perkins 4.99 - Page 38

Perkins 4.99
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CYLINDER
HEAD-E.8
E20
4.
Fit the
push
rods
in
their
locations
then
carefully
fit
the
rocker
shaft
assembly,
noting
that
the
valve
adjusting
screw
ends
locate
in
their
respective
push rod
cups
and
the
oil
feed
to the
rocker
shaft
is
located
correctly.
5.
Locate
the
oil
feed
pipe
nut
just
finger
tight
at
this
stage,
then
evenly
tighten
the
rocker
shaft
bracket
securing
nuts
to
a
torque
of
12 - 15
Ibf
It
(1,7
2
kgf
m)
now
tighten
the
oil
feed
pipe
nut.
When
correctly
located
the
oil
feed
pipe
will
be
as
shown
in Fig. E.2.
NOTE:
If
the
oil
feed
pipe
nut
is
tightened
before
the
rocker
shaft
bracket
securing
nuts,
:he
pipe
will
either
be
strained
or
the
olive
pulled
off
the
feed
pipe.
E22
E21
6.
Adjust
the
valve
clearances
to
0.012 in
(0.3
mm)
as
follows:-
Turn
the
engine
so
that
the
valves
of
No.1
cylinder
are
in
the
position
of
'valve
overlap',
i.e.
the
period
between
the
opening
of
the
inlet
valve
and
the
closing
of
the
exhaust
valve. In
this
position,
adjust
the
clearances
of
No. 4 cylircder
valves:
similarly
with
the
valves
of
No.
3
cylinder
in
the
overlap
position,
adjust
the
valves
of
No.
2
cylinder.
With
valves
of
No. 4
in
the
overlap
pOSition,
adjust
the
valves
of
No. 1
cylinder
and
finally
with
valves
of
No.2
cylinder
in
overlap
position,
adjust
valves
on
NO.3
cylinder.
7.
Replace
the
dynamo
or
alternator
adjusting
link
and
tension
the
fan
belt
(Refer
to
Page
M.1
i.

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