MG MGB User Manual

THE OVERDRIVE (TYPE
L.H.)
5.
6.
Inspe
7.
Press the
solenoid coil
and
base
cap
from
the housing.
Remove
the
operating
valve
plunger
and
ball
by
shaking
from
the
solenoid
rod.
ction
Examine
the valve
ball
and
seat
for
pitting
and
scoring
and
renew
damaged
parts;
the ball
may
be
reseated
by
light
tapping
onto
the
seat
using
a
suitable drift.
Inspect
the
‘O’
ring
seals for
signs
of
deterioration,
and
renew
as
necessary.
Reassembling
9.
Reverse the dismantling
procedure
4
to
6.
Refitting
10.
Reverse the
removing
procedure
in 2
and
3, ensuring
that
the
lead
grommet
is
pressed
fully
into its
slot, and
using
a
new
gasket
under the solenoid
cover.
Section Fc.8
PUMP
AND
NON-RETURN
VALVE
Removing
1.
Drain
the
gearbox
and
overdrive
unit.
2.
Remove the
sump
filter—Section Fc.5,
2
and
3.
3.
Using tool
18G
1118,
unscrew
the
pump
retaining
plug.
4.
Remove the
non-return
valve
spring
and
ball.
5. Remove
the
pump
body, the
pump
plunger
spring
and
plunger.
Dismantling
6.
Using
a
suitable
drift,
separate
the
non-return
valve
seat
from the
pump
body taking
care
not to
damage
the bore
of the
pump
body.
Inspection
7.
Examine
the ‘0’
ring
seals for
signs
of
deterioration,
and
renew
where
necessary.
8.
Examine the
non-return
valve ball and
seat
for
scoring
and
pitting,
and
renew
damaged
parts;
the ball
may
be
reseated by
lightly
tapping
onto
its
seat
using
a
suitable
drift.
Reassembling
9.
Carefully re■t the
non-return
valve
seat to
the
pump
body.
Refitting
10.
Insert
the
pump
plunger
into
the
casing,
ensuring
that
the ■at side
of the
plunger
is
towards
the
rear
of the
overdrive
unit
and
retain in position
with too]
18G
1117.
1 1.
Reverse
the
removing
procedure
in 2
to
5.
MGB.
Issue 1.
15676
Fig.
Fc.8
Using tool 18G
1117
to
retain
the
pump
components
Section Fc.9
OVERDRIVE
ASSEMBLY
Removing
OVERDRIVE
UNIT
1.
Remove the
engine
and
gearbox
from
the
car as
described
in Section A.
2.
Remove the
gearbox drain plug
and drain the oil from
the
gearbox and
overdrive.
3. Unscrew the
six
bolts
securing
the
remote
control
assembly
to
the
gearbox and
remove
the
remote
control.
4. Remove the
eight
nuts
from
the
studs
securing
the
overdrive
unit
to
the
gearbox adaptor.
5. Withdraw
the
overdrive
unit
from the
gearbox
adaptor.
OVERDRIVE
ADAPTOR
6.
Remove
the
overdrive
unit
as
in 1
to
5.
7.
Slide
the overdrive
pump
driving
cam
from
the
gearbox shaft
and
remove
the
cam
locking ball from
its
pocket
in
the shaft.
8.
Using
tool 18C
1004,
remove
the
pump
cam
circlip
from the
shaft.
9.
Withdraw the
selector
interlocking
arm
and
plate
assembly.
10.
Unscrew
the eight
nuts
securing
the
adaptor
to
the
gearbox
and
withdraw
the
adaptor.
Dismantling
11.
Remove the
solenoid
cover
and
gasket.
12.
Withdraw
the solenoid
and plunger.
13.
Remove the relief
valve
assembly.
14.
Remove the
sump
and
■lter.
15.
Using
tool
180
1118,
unscrew
the
pump
retaining
plug and
remove
the
pump
components.
16. Remove the
speedometer drive
retaining clip, drive
gear,
and sealing washer.
Fc.9

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English