Gearbox; Primary Chaincase; Cycle Parts; Chains - Triumph SPEED TWIN 1945 Workshop Instruction Manual

pipe banjos t o the rocker spindles, when a steady d r i p o f o i l should emerge. It
is
advantageous t o flood t h e rocker mechanism
i f
t h e machine has been "laid up" f o r
an appreciable time, o r even after de-carbonising, etc. T o d o this, start t h e engine
and then remove the o i l tank filler cap, when a finger can be placed over t h e scavenge
outlet pipe, thus forcing the o i l through the rocker spindles, rockers, and t o t h e
push rods. NOTE:-Always use t h e correct grade o f o i l as recommended o n page
102.
Cheap, inferior o r t h e incorrect grade o f o i l w i l l shorten t h e life o f t h e engine.
G E A R B O X
The gearbox is lubricated by o i l and under no clrcumscances should a heavy viscous
oil o r grease be employed.
.
Splash o i l i s fed t o all parts including t h e enclosed
gearchange and kickstarter mechanism t o ensure cornplete lubrication. Fcr o i l
changing and routine maintenance see pages 31 and 32.
P R I M A R Y C H A I N C A S E
The primary chaincase houses t h e clutcl?, primary drive chain, engine sprocket an;
for the Models 5T and 6T t h e alternator unit. Care should always be take2 t o
ensure that the correct o i l level i s maintained; the lubricant qudities are n o t reduced
by condensation if the correct grade o i l (SAE 20)
i s
employed. Failure t o observe
these elementary instructions may result i n a b u r n t o u t clutch, chain failure and
possibly damage t o t h e alternator unit.
If an o i l o f a higher viscosity than SAE 20
is used, the clutch plates w i l l be difficult t o separate thus causing extremely noisy
gear changing. For oil changing and routine maintenance, see pages 31 and
32.
C Y C L E P A R T S
Component parts such as headraces, brakes and swinging fork mechanism are p r o -
vided w i t h grease nipples f o r lubrication purposes. Use only the recommended
greases; heavier grades w i l l n o t ensure correct lubrication, whereas lighter grades
will
have a tendency t o pass t h e sealing points.
.
It
w i l l b e noted that n o provision
i s made f o r greasing t h e wheels; o n assembly t h e wheels are packed w i t h grease and
n o further greasing is necessary u n t i l they are examined for general wear and tea:
(See Routine Maintenance, page 31).
C H A I N S
The front chain i s enclosed and positively lubricated (See Primary Chaincase, page 30).
The rear chain, however, i s lubricated by controlled o i l splash f r o m t h e primary
chaincase. The method' used is an o i l trough i n t h e rear of the inner chaincase and
a hole drilled t o atmosphere. In the outer cover a corresponding hole i s drilled
and tapped, i n t o which a tapered needle valve is screwed, the taper entering t h e
hole i n t h e inner cover. By screwing the valve i n o r o u t the c i l supply t o the real-
chain is decreased o r increased accordingly.
C O N T R O L S
The control cables require lubricating at intervals, as, i f they become dry, stiffness
i n operation w i l l resblc.
A
good plan is t o remove t h e cable at t h e handlebar end,
wrap a piece of b r o w n paper around t h e t o p end of t h e casing t o form a funnel.
securing
it
i n position by
a
rubber band.
If t h i n machine oil is then fed i n t o t h e
funnel and allowed t o remain overnight, it w i l l trickle d o w n t h e casing and lubricate
the inner wire.