D
TRANSMISSION
(GEARBOX)
Fig.
OiO.
Drift
dimensions.
Fig.
011.
High
gear bearing all
seal
and
housing
the
casing, by means of a suitably
shouldered
drift.
Whilst
the
casing
Is
stili hot, drive
In
the
new
bearing, using a suitable
tubular
drift
on
to
the
outer
race, and press
In
the
neW
oil seal Into
the
holder.
Note:
The
drift will,
of
necessity, be located
against
the
roller
end faces, and
thus
It
Is
not
advisable
to
disturb this bearing unless It
Is
to
be
replaced by a new
one
(See Section
08
paraA).
MAINSHAFT
HIGH
GEAR
BEARINGS
Two
caged needle bearings are fitted Into each
end
of
the
high
gear
and
they
can be both pressed
out
togerher
using a drift
to
the
dimensions given
In
Fig.
09.
LAYSHAFT
The
right
needle
roller bearings should be
removed
by heating
the
cover
to
approximately 100"C.,
then
pressing
or
drifting
OUt
the
bearing using a
tool
similar
to
that
shown
In
Fig.
D
12.
PUt
aside
the
thrust
washer
and
note its location.
Fig.
012.
Sketch
of
needle
roller
and
drift
The
new bearing should be pressed
In
whilst
the
cover
Is
stili hot, from
the
Inside of
the
cover, until
.073/.078
In.
of
the
bearing
protrudes
above
the
cover
face (see
Fig.
D
12).
The
left needle roller bearing
Is
of
the
closed-end
type
and
Is
accessible from
the
left,
through
the
sprocket
cover plate
.perture.
The casing
should
be
heated
to
approximately 100·C. and
the
bearing
driven
through
Into
the
casing using a
soft
metal
drift,
taking care
not
to damage
the
bore Into which
the
bearings fits.
PUt
aside
the
thrust
washer,
and
note Its location.
The
new bearing must be carefully
pressed
In
the
casing
Is
hot,
until .073/.078 In.
protrudes
above
the
machined face Inside
the
case.
Do
not
use
excessive
force or the needle roller
outer
case may
become
damaged, resulting
In
the
rollers seizing,
or
breaking up.
Finally;
the
outer
portion
of
the
bore Into which
the
bearings fits, should
be
sealed with a
suitable
proprietary
sealant.
SECTION
011
REASSEMBLING
THE
TRANSMISSION
(GEARBOX)
Lubricate
the
camplate and spindle and offer
it
Into
the
spindle
housing within
the
case.
Fit
the
high
gear
bearing
011
seal
In
its circular hous-
Ing,
the
closed side flush with
the
outer
face. (See
012
Fig. 011). Assemble
the
high
gear
In
the
bearing.
Lubricate
the
ground boss
of
the
sprocket
with
011,
and slide It through
the
seal and
onto
rhe
high
gear.
Screw on the securing nut, finger
tight.
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