Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 142 / 413

4th re-issue
Pages
MAINSHAFT ASSEMBLY
To remove (Figs. 3, Sa and Sb)
Remove top and rear covers, selectors and front,
cover.
On early cars (inset B, Fig. 3) release lockwasher
(36) and undo nut (37), securing bearing to shaft
and remove distance piece (49) and speedo gear (48).
On later cars, the speedo securing circllps
(48A),
speedo gear and key
(48
and
488) must
be removed
before removal of the nut
(37)
and /ockwasher
(36).
Fig. Sa.
Driving
out
moinsha(t
Support the mainshaft assembly at its forward end
and, with the aid of a mallet, drive the mainshaft
assembly forward until free of the rear bearing (21 ).
Hold the second speed synchrohub assembly (23 to
26) by hand and withdraw the malnshaft assembly
through the aperture in the front of the casing.
Lift out the second speed synchrohub assembly
and wheel through the aperture In the top of the
casing.
To refit
Refitting of the malnshaft. assembly Is a reversal of
the preceding Instructions with particular attention
to the following:-
WSM.124
Section E (Gearbox & Overdrive)
Fig. Sb.
Removing mainsha(t
Oil the inner surface of the second speed baulking
ring (17) and secure it to its mating cone by light
hand pressure in order to safeguard against the
baulking ring floating and becoming trapped during
the driving rearward of the mainshaft into the
bearing.
During the driving in of the mainshaft to the rear
bearing care must be taken to align the second speed
shifting plates (25) with the slots In the second
baulking ring (27); also the first speed wheel (23)
and the 3rd and 4th speed sliding sleeye (30) should
be retained in position on their respective hubs
(24) and (30) by hand.
It is essential that the rear main bearing (21)
is positioned so that it is held firmly against the
second speed hub distance piece (24A).
To ensure this condition, place the gearbox on a
press so that the bearing inner track rests on the
base plate and the mainshaft passes through the
V-notches. Place a protector sleeve over the
stemwheel spigot and press the shaft through the
bearing until the hub distance piece Is securely held
between the bearing and the second speed hub
(see Fig. 6a).