MG MGA Twin Cam Workshop Manual page 102

Mga series
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G
THE
PROPELLER
SHAFf
GENERAL
DESCJUPTION
The propeller
shaft
and universal
joints
are of
the
Ha
rdy
Spicer type
with
needle-roller
bearings.
A
single shaft conne<:ts tbc rear
axle
and
tbe
gearbox.
To accommodate
fore and
aft movement
o
f
the
axle
~he
shaft
is provided with
a splined sliding
joint
at
the
front
cod.
Each
universal
joint
consists
of
a centre
spider, four n«dJe.roller bearing assemblies, and two
yo
lees.
F1 1
.
G
I
IYhtr~
10
opply light
biOK"S
lo
tht
yolk
oflu wno••ing
lht rtloining
cirdip
Section
G.l
ATTENTION TO
UNIVERSAL JOINTS
The propeller shaft has a lubricator filled
to
the front
and rear
spiders
which should be gh-en three or four
strokes
with the grease gun every
1,000
miles
(1600
bn.}.
The
correct
lubricant
is
grease to
Ref. C (page
P.7).
If
a large amount of grease exudes
from
the oil seal
the joint
should be dismantled
and
new oil seals filled
(see
Section
G.6).
A
lubricator
is
also
provided
on
the
sleeve
yoke
for
the
lubrication
of the splines or
the
sliding joint.
Lubrication
in servi<:e is with grease to
Ref.
C
(page
P.
7) every
1,000 miles (1600
km.).
After
dismantling,
and
before
reassembling, the inside
splines
of the sleeve yoke
should
be
smeared
liberally with grease.
There are,
therefore,
three
lubricators in
all
on the
propeller shaft, one on
each
universal joint
and
one on
the sliding
joint.
G.2
Section G.l
TESTING
FOR WEAR
(la
Posltioa)
Wear
on
the
thrust faces is
ascertained
by
testing the
lift
in
the
joint
either by hand or
with
the aid of a
length
of wood suitably pivoted.
Any circumferential movement of
the
shaft
relative to
the
llange
yokes indicates wear in the needle-roller
bearings or in the splined
shaft.
Section G.3
REMOVL~G
THE PROPELLER
SHAFT
Before removing
the bolts
and
nuts
securing
the
propeller shaft universal joint flanges
to
the gearbox
flange
aod
the rear axle
fhtnge
carefully
mark
the
flanges
to
assist
in
refitting them
in
their original positions.
1llis
is
important.
Remove the
bolts
and
nuts securing the propeller
shaft
to
the gearbox flange
and
carefully
support it
while
removing the bolts
and
nuts
securing the
shaft
to the
rear
Fig. G.2
WhM dismanlling
a
un/W:r.rof
join/
the
bearings
moy be
lop~d
our wllh o
smo/1-diamdtr
rod from
/he
inside os shown.
Take
care
not
to
donroge
lht
rolftr
races

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