Clean head joint faces and
fit
aluminium
gasket. Obtain assistance to hold push rods
and covers in position whilst fitting head. En-
sure composition washers correctly positioned
at top and rubber washers at bottom of push
rod cover tubes and
fit
head nuts tightening
them down evenly.
Re-fit remaining components, remove in-
sp:::ction
cover and check push rod adjustment
-no
clearance but pushrods free to rotate.
15.
DISMANTLING
&
RE-ASSEMBLY
OF
ROCKER
BOX.
Whilst rocker box is removed
it
may be
necessary to remove the rockers for examina-
tion or re-bushing. Remove the inspection
cover and the rocker spindle nuts and washers,
and with a soft punch against the threaded
end, drift the spindles out of position.
The
rockers with their washers and shims
may be extracted from the box.
Remove the exhaust valve lifter by first
removing the small securing screw, when the
lifter may be withdrawn.
The
rocker bushes are a press fit in the
rockers and may be pressed or drawn out
as
shown
in
fig.
5.
Rocker ball ends and pads requiring renew-
ing may be drifted out with a punch.
Press in new rocker ends, ensuring that the
hole in the shank of the ball end
is
lined up
with the oil hole in the rocker arm.
New rocker bushes may be pressed in or
drawn into position by reversing the method
of extraction illustrated.
New bushes should be reamed with
9/16"
dia. reamer after fitting.
The
re-assembly of the rockers in the box
may require a little patience. Fig. 3 shows
clearly the position of the various parts. Note
that the steel shims on either side of the spring
washers are identical, the thrust washer at the
opposite end being much thicker.
Obtain a bar slightly smaller than the large
spindle hole and having a lead on one end.
Insert this into the hole far enough to allow
the shims and spring washer to be placed over
it. Carefully thread the rocker into position (it
may be necessary to slightly withdraw the bar
to get the rocker right home), centralise the
washers
as
nearly
as
possible, remove bar and
insert spindle, having previously smeared
it
with oil.
Using soft punch tap spindle part
way
through rocker.
11
Compress spring washer by means of screw-
driver inserted into push rod hole and bearing
on rocker arm and place thrust washer in
position; the pressure of the spring washer will
hold it until the spindle
is
knocked further
home.
Pig.
5.
Rocker Bush Rimm;al.
It
is
unlikely that the washer will be
in
true
alignment with the spindle and will, therefore,
be pinched between the rocker box and the
shoulder on the spindle when the latter is
tapped further into position.
To
release
the
washer tap the opposite end of the spindle
once only.
Re-insert the screwdriver and again compress
the spring washer. This
will enable the thrust
washer to be persuaded to drop over that part
of the spindle on which
it
fits.
Insert tin strip or end of steel rule
between
rocker box and thrust washer, tap spindle
fully home, remove tin strip, ensure
that
rocker is free to move, fit copper washer and
dome
nut
and tighten.
16.
TO
ADJUST
PUSH
RODS.
Release the middle
hexagon-the
locking
nut-by
placing one spanner on the bottom
Fig.
6.
O.H. V.
Pwh
Rod
Adjustfflfflt.
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