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PART 7-1
AUTOMATIC TRANSMISSION (Borg-Warner)
7-33
FRONT SERVO
To Dismantle:
Depress the servo
pis~on
and
pistoh guide assembly, to over-
come spring pressure, and remove
the circlip which retains these
parts (Fig. 41). The piston spring
will then push the piston and its
guide from the servo housing. With-
draw the piston from the guide and
extract the spring.
Remove the
square section
sealin~
ring from
~he
guide and the two c1rcular sectiOn
sealing rings from the
piston.
To remove the operating lever
from the housing it is necessary to
withdraw the lever's pivot which
may be retained by a pin in the
servo housing.
This pin can
~e
tapped out with the aid of an
i
m.
diameter
drift.
To Reassemble:
If the operating lever has been
removed from the servo housing it
should be refitted so that the ad-
justing screw will pass
thro~gh
th.e
hole in the end of the
housmg.
F1t
the pivot through the housing and
operating lever, ensuring that !he
retaining pin holes in the housmg
and pivot are in line.
Fit the re-
taining pin
.
Fit the two circular section seal-
ing rings to the piston and the
square section scaling ring to the
piston guide
.
Insert the piston into
the
guid~
so that the nanges of the
piston and guide ab~t. . Place t~e
piston retracting sprmg m the
P!S-
ton and insert the assembly, p1s-
FIG. 39 -
Fitting Rear
Clutch Piston
ton first, into the housing.
Retain
with the circlip after depressing the
piston guide to overcome spring
pressure.
REAR SERVO
To Dismantle:
To withdraw the servo piston it
is unnecessary to remove the oper-
ating lever, the pivot of which is
secured in the housing.
Depress
the straight arm of the spring and
disengage from the lug cast in the
side of the servo body. Remove the
!'.pring, withdraw the piston (see
(Fig. 42).
To Reassemble:
If removed, fit the sealing ring
to the piston.
Hold the operating
lever away from the piston bore
and insert the piston spigot into the
conical seat of the operating lever.
It is then possible to manoeuvre the
piston into the housing (Fig. 38). Fit
the spring to pivot pin engaging the
bent arm with the servo lever and
depress the straight spring arm and
engage with the lug on the servo
body.
GOVERNOR
To Dismantle:
To separate the two parts of the
governor body remove the two
cheese-headed
screws,
together
with their spring washers.
The
governor valve and spring can be
removed from the governor' weight
in one part of the body by
re~ov
ing the governor spnng retamer
which pa~tially encircles the gov-
ernor weight stem (Fig. 43). If neces-
sary, remove the cover plate whiclt
is retained by two screws to that
part of the body which accom-
modates the governor weight.
To Reassemble:
If the cover plate has been re-
moved, refit and retain with the two
screws.
Pass the stem of the gov-
ernor weight through the body
from the top, slide the valve, smal-
ler diameter first, over the govern-
or weights stem, followed by the
spring and
sec~re
with the . re-
tainer, dished s1de to the sprmg.
After cleaning the mating faces,
secure the two parts of the g:. ;ernor
body together with the two cheese-
headed screws and spring washers.
FIG. 40 -
Fitting Rear
Clutch Plates
TO REASSEMBLE THE
TRANSMISSION
1.
Refit the rear band adjuster
by screwing into the case from the
inside and fit the locknut to the
thread on the outside of the case.
Reposition
the
parking
pawl
mechanism in the box and replace
the two pivot pins.
The stepped
pivot should be tapped right home
and a new tension pin fitted to the
case to prevent this pivot coming
out.
2. The parking pawl and inhibitor
switch actuating mechanism should
be repositioned, in the manner re-
moved, on the pivot in the case (see
Fig.
34). To assist, the spring should
not be attached at one end until the
complete unit is assembled and se-
cured with the washer and spring clip.
Then, the free end can be posi-
tioned to tension the spring. Before
continuing with the assembly check
the working of the parking pawl
by manual operation.
3. Replace the seal in the cross-
shaft boss in the case. Carefully
slide the cross-shaft into the case
from the side opposite to the inhi-
bitor switch and position on the
shaft the collar, parking pawl
actuating
mechanism
and
bias
spring, in that order (Fig. 34). Pass
the shaft through into the opposite
boss in the case and locate in the
correct position with the collar and
tension pin.
Position the spring
and ball and compress with a piece
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