Dismantling And Assembling The Control Timer; Dismantling And Assembling The Rear Extension - MG MGB Workshop Manual

THE GEARBOX
»
F
Slide
out
the shafts
and remove the forks in the
following order:
reverse,
fourth
and third speed,
second and ■rst speed.
10.
If dif■culty is experienced
in removing
the shafts
remove the front cover and use a soft drift to tap the
shafts out from the front of the box.
11. Remove the nuts and washers securing the front cover
and then
remove
the cover, gasket, and the ■rst
motion shaft bearing shims. Do not remove the oil seal
from the cover unless it has to be renewed.
12. Unscrew the reverse shaft locating screw and remove
the shaft and gear.
13. Using a soft drift,
tap out the layshaft from the front
of the box and allow the laygear to rest in the bottom
of the box.
.
14. Ease the rear bearing housing
from the rear of the
gearbox and withdraw
the third
motion
shaft
assembly.
15. Withdraw the ■rst motion
shaft from the front of the
gearbox. A soft drift
may be used to tap the shaft
from the inside of the box.
16.
Reassemble the laygear on its shaft and check the
end-■oat of the gear (see 'GENERAL
DATA').
17. Remove the layshaft, laygear, and thrust washers.
Section F.3
DISMANTLING
AND ASSEMBLING
THE CONTROL TOWER
Do not dismantle the control tower unless worn or broken
parts are to be renewed.
1.
Remove the ball spring cover circlip to ease the
tension on the spring and then remove the two change
speed lever locating pins. Withdraw
the lever, and from
it, remove the knob, cover and spring.
A5541W
Fig. F.1
Checking the laygearend-float
MGB. Issue4. 5335
A5544W
Fig. F.2
Using Service tool 18G 5 to unscrew a first motion shaft nut.
This nut has a left-hand thread.
2.
From the rear of the control
tower
unscrew
the
reverse plunger detent screw and remove the reverse
plunger detent spring and ball.
3.
From the side of the tower remove the reverse plunger
locating pin and retain the plunger and spring that will
be released from inside the tower.
Assembly is a reversal of the dismantling
sequence, but care
must be taken to ensure that the front and rear selectors are
correctly
lined up and that the clinch bolts pass across the
■ats on the remote-control shaft.
When ■tting a new pin to retain the reverse selector plunger
ensure that the plunger is depressed suf■ciently
enough to
permit the pin to engage the ■ats on the plunger.
Section F.4
DISMANTLING
AND ASSEMBLING
THE REAR EXTENSION
1.
Remove the rear selector lever clamp bolt, lever, and
the Woodruff
key and withdraw the shaft from the
rear extension.
Do not dismantle the rear extension
any further
unless the oil seal and/ or bearing has to be
renewed, in which case proceed as follows.
2. Using Service tool 18G 389 and 18G 389 C, remove
the rear oil seal.
3.
Remove the rear extension bearing circlip and press
out the bearing.
Assembly is a reversal of the dismantling sequence. If the
bearing and/or oil seal have/has been removed, press in the
new bearing and secure it with
the circlip, and, using
Service tool 18G 134 and adaptor 18G 134 N, ■t the new
oil seal.
-
F.5