MG MGB - The Lower Valve Body; Location of the Pump and Converter Oil Tubes

‘
THE AUTOMATIC
GEARBOX
‘
.‘0
19.
20.
21.
manometer
AQBSEA
Fig. Fd.15
The lower
valve body
Manual control
valve.
10.
Secondary
regulator
valve.
Down—shiftvalve.
11.
Springvsecondary
regulator
Springidown-shift
valve. valve.
Throttle valve.
12.
Servoorifice
control valve.
Spring—throttle
valve.
13. Springiservo
orifice
Retainer.
control valve.
Primary
regulator valve.
14. Retainer.
Sleeve~primary
regulator
15. Modulator valve.
valve.
16.
Plugwmodulator
valve.
Spring—primary
regulator
17. Springvmodulator
valve.
valve.
18. Retainer.
19. Dowel pin.
Carefully
remove
the
separating
plate from
the lower
valve
body
assembly.
Remove the
pump
check
valve
(disc)
and
spring,
the
converter
check
valve
(ball)
and
spring,
the
manual
control valve,
and
the
down—shift
valve and
spring.
Withdraw the throttle
valve
stop
plate
and
remove
the
throttle
valve,
spring
and valve
spring
retainer.
'22.
Unscrew
the three
lower
valve
body
end plate
retaining
screws
and
remove
the end plate.
'23. Remove the
primary
regulating
valve
spring, valve
sleeve
and valve.
24.
Remove
the
secondary
regulating valve
spring
and
valve.
25. Remove
the
servo
ori■ce
control valve
stop,
valve
spring
and valve.
26. Remove
the
dowel
retaining
the
modulator
valve
retainer,
withdraw
the
retainer, modulator
valve,
valve
plug
and
spring.
Inspection
27. Clean
all
parts
in
cleaning
solvent
and dry
with
compressed
air.
28. Check
all ■uid
passages
for
obstruction.
29. Inspect the
valve,
bores,
and
mating
surfaces
for
burrs
and
scores.
30. Check
the
springs
against
the
table
given
below.
A9384WA
Fig. Fd.l6
Location of
the
pump
and
converter
oil
tubes
1. Pump
inlet.
2. Converter
outlet.
3.
Converter
inlet.
4.
Pump
outlet.
Free length
Spring
rate
Spring
No. of Coils
Wire
diameter
Primary
regulator valve
15
.056
in.
(1.42
mm.)
(Alternative)
141/2
.054 in.
(1.37
mm.)
Secondary
regulator
valve
211/2
.650
in.
(16.51
mm.)
Throttle
valve
191/21
.032 in.
(Alternative)
18
f
(.81
mm.)
Throttle valve
return
28
1
.018
in,
.
(Alternative)
..
25
f
(.45
mm.)
Servoorifice
control valve
25
.024
in.
(.6
mm.)
Modulator
valve
17
.024 in.
(.52
mm.)
1—2
shift valve
..
'
131/2
.024
in.
(.52
mm.)
2—3shift
valve
..
22%
.036
in.
(.91
mm.)
2.850
in.
9.3
to
8.4 lb.
at
1.090
in.
(72.4
mm.)
(4.2
to
3.8 kg.
at
27.69
mm.)
2.850
in.
9.3
to
8.4 lb.
at
1.090
in.
(72.4
mm.).
(4.2
to
3.8 kg.
at
27.69
mm.)
2.594 in.
11.25
to
9.75 lb.
at
1.937 in.
(65.9
mm.)
(5.1
to
4.4 kg.
at
48.2
mm.)
1.175
to
1.185
in.
(29.84
to
30.1 mm.)
.807 in.
4.04
to
3.66 lb.
at
.750 in.
(1.8
to
1.6
kg.
at
19.05
mm.)
.65
to
.55 lb.
at
.593 in.
(20.5
mm.)
(.29
to
.25
kg.
at
15.06
mm.)
1.213
in.
1.27
to
1.39
lb.
at
.75 in.
'
(30.81
mm.)
(.46
to
.47 kg.
at
19.05
mm.)
1.005 in.
1.01
to
1.13
lb.
at
.754
in.
(25.5
mm.)
(.46
to
.51
kg.
at
19.15
mm.)
1.094 in.
1.8
to
2.1 lb.
at
.5
in.
(27.8
mm.)
(.82
to
.95
kg.
at
12.7
mm.)
1.59 in.
1.47
to
1.33 lb.
at
1.178
in.
(40.4
mm.)
(.67
to
.6
kg.
at
29.92
mm.)
Fd.20
MGB.
Issue1.
15676