Gear Operating Quadrant; Bearing; Speedometer Drive; Gearbox Casing - Triumph SPEED TWIN 1945 Workshop Instruction Manual

Dismantling Gearbox
G E A R B O X I N N E R C O V E R
G e a r O p e r a t i n g Q u a d m t . This quadrant can be inspected for wear on the
teeth while still i n position. The freedom of the spindle can also be checked.
It
is,
therefore, unnecessary t o remove the quadrant unless it requires changing. To do
this, remove the split-pin and withdraw the spindle.
Replace
it
in the opposite way.
using a new split pin.
Bearing. Remove the retaining circlip and press the bearing out ; thoroughly
degrease
it
and dry with compressed air i f possible. Check for roughness, pitting,
indentation and end float
;
make sure that the inner race is a tight push fit on the
mainshaft. When replacing, heat the c x i n g and then press the bearing into position.
Re-fit the circlip, ensuring correct engagement in the groove. Liberally oil the
bearing.
Speedometer Drive. Using a soft metal drift against the spindle gear, gently tap
the drive gear and bush out of its housing. Examine the gear for worn teeth and
check the fit in the bush. To replace, f i t the thrust washer over the gear spindle
and thread the spindle into the bush. Fit the assembly into the cover, gear first.
Fit the oil seal into the annular groove in the bush and press the bush into position
until the keyway in the bush lines up w i t h the screw hole.
K i c k s t a r t e r Ratchet and Pinion. This assembly has already been removed t o
take off the inner cover. The pinion and ratchet should be checked for chipped or
broken teeth and the spring for fatigue. Replace after the inner cover
i s
back in place.
G E A R C L U S T E R
Gwrs. Examine all the gears thoroughly for chipped, fractured o r worn teeth.
Check the internal splines and bushes. making sure that the splines are free on their
respective shah, with no tendency
to
bind, and the bush in the iayshaft low gear
i s
not worn.
G E A R g O X C A S I N G
Carnplata and Plunger Assembly. Unscrew the acorn nut
a t
the base of the
main casing and withdraw the camplate plunger and spring.
Remove the camplate
from the bush. Make sure that the plunger works freely in
i t s
housing. Check
the spring for fatigue. Examine the camplate carefully for signs of wear in the roller
tracks
at
such wear will make gear selection difficult and damage t o the gears may
result. Change the amplate i f a worn track
i s
evident. To replace, tit the camplate
spindle intothe bush and screw the plunger assembly (pointed end engaging the cam)
into the plunger housing. Secure the camplate in the TOP (4th) gear positions
(See Fig.
26).
Chain Sprocket.
Place a smail aluminium block between a sprocket tooth and
the vice, t o stop the sprocket rotating, and unscrew the sprocket nut. I t may be
necessary t o tap the end of the spanner with
a
hammer t o free the nut. Ease away
the sprocket.