Removing And Refitting The Axle; Crown Wheel And Pinion Markings; Measuring The Crown Wheel Backlash - MG MGB Workshop Manual

[I
THE REAR AXLE AND
SUSPENSION
A
/7
I/
B
/
33+
1
_
E
IISII
1—:
Fig. H.l3
Crown wheel and pinion markings
.
Pinion head thickness.
.
Crown wheel marking.
.
Pinion marking.
.
Pinion mounting distance.
.
Crown wheel mounting distance.
Tighten the bolts to the correct torque wrench reading
and knock over the locking tabs.
3. Fit- the differential to the gear carrier. Replace the
bearing caps and tighten the nuts to a torque wrench
reading of 65 1b. ft. (8.99 kg. m.). Bolt the Service
tool surface plate to the gear carrier ■ange and mount
the clock gauge on the magnet bracket in such a way
that an accurate backlash ■gure may be obtained. (See
Fig. H.14.) The correct ■gure for the backlash to be
used with any particular crown wheel and pinion
is
etched on the rear face of the crown wheel concerned
and must be adhered to strictly.
A movement
of .002 in. (.05 mm.) shim thickness
from one side of the differential
to the other will
produce a variation in backlash of approximately
.002
in. (.05 mm.). Thus it should be possible to set up the
differential, even though the backlash is incorrect,
by
removing the hearings on one occasion only.
Great
care
must
be taken
to
ensure
absolute
cleanliness during the above
operations,
as any
discrepancies resulting from
dirty assembly
would
affect the setting
position
of the crown
wheel or
pinion.
H.10
Section H.8
REMOVING
AND REFITTING THE AXLE
Raise the rear of the car.
Mark the propeller shaft coupling ■anges so that they may
be replaced in the original
relative positions.
Remove the
four bolts and self-locking
nuts and release the rear end of
the propeller
shaft from the axle. Remove the nuts and
spring and ■at washers securing each end of each check
strap to the anchor pins and remove the check straps.
Remove the split pin and clevis pin securing the brake.
cables to each brake operating lever. Remove the small nut
and Phillips
recessed-head screw securing the hand brake
cable clip to the axle casing. Remove the self-locking
nut
and large ■at washer securing the brake balance lever to the
pivot on the axle casing.
Remove the nut and spring washer securing the lower end
of each damper link to the rear spring clamp plate.
Unscrew the brake ■uid supply pipe union and release the
■exible pipe from the battery box support bracket.
Release the exhaust pipe from the exhaust manifold
and
the two supporting
brackets and lower the exhaust pipe
assembly.
Remove the nut and spring washer from the spring front
anchor pin.
Support the axle casing and remove the rear shackle plates,
brackets, and rubbers. Lower the axle support until the axle
and spring assembly rests on the road wheels. Withdraw
the
front
anchor pins and roll the assembly from beneath the
car.
The
axle is now free
to be withdrawn
on the stand
rearwards fromthe
car.
Replacement is the
reverse of the above sequence of
operations.
A9I4BW
Fig. H.14
Measuring the crown wheel backlash
MGB.
Issue4, 60230