MG MGA Twin Cam Workshop Manual page 108

H
THE REAR AXLE
Fig. H.l
l.ins< ·rew and rrmo•·c the four self-lockillg nuts to
witluln.1w the !rub extension
GENERAL D FSCRIPTION
The rear axle
is
of the three-quarter-floating type,
incorporating hypoid final reduction gears. The adc
shafts, pinion, and d ifferential assemblies can be with·
drav;n
without removing tbe axle from the
vehicle.
T he rear axle "heel bearing outer raoes are located
in the hubs; the inner racrs are mounted on the axle
tul-c and secured by nuts and lock washers.
The differential a nd pinion shaft bearings
are
prr-
h•.t<1cd. the am<•unt of preload being adjustable by shims.
"f ill·
r~>sit inn
nf the pinion
in
relation to the crown wheel
i' dctcmuncd hy
a
spacing washer. The backlash between
the
£Car<
is adjustable by shims.
Su,pcn<ion is by semi-elliptic leaf springs, rubber-
mo unted, und the shackles arc fitted with rubber b us hes
of the 1\cxintt type.
LUBRICATION
T he axle i< filled or topped up with oil through the
filkr plug in the rear CO\er by means of an 011 gun with
a special adaptor.
lt
is of the utmost importance that
only hypoid oils
of the appro,cd grades and manufacture
be
used if
satisfactory service is to be obtained from the hypoid
gear'-
H.4
Inspect the oil le,·el every 1,000 miles ( 1600 km.) and
top up as necessary to the level or the filler opening with
oil to Ref. B.
After the first 500 miles (800 lcm.) and subsequently
every 6,000 miles ( 10000 km.) drain o ff the old oil and
refill with new. The capacity of the axle is
2i
pints
(3·3 U.S. pints, I·S6 litres).
The hub bearings are lubrica!ed from the axle and no
p rovision is made for any 01her Mtcn!ion.
Section
H.l
REMOVING A ' D R EP LACI NG A HFB
EXTENSION A.'ID AXLE S HAIT
Jack
up
the car and place bloelcs under 1he spring as
close as possible to the axle.
Remove the wheel.
Release the hand brake.
Unscrew and remove the four self-locking nuts
securing the hub extension driving flange to the hub.
Withdraw the hub extension and axle shaft by gripping
the driving fla nge or the winged hub nut, which may be
temporarily refitted for this purpose.
Remove the welch plug
:~nd
apply p ressure to the end
of the axle shaft with a hand press to remove the bub
utension from the spline on the shaft.
To replace the shaft and driving flange reverse the
above sequence of operations. If the welch plug has been
distoned on
remo~-al
a
new one should be fined.
Fig. H.2
Using hub remo•-er 18G304 wlrh odoprors
18G304B
and rhrusr pod 18G304J