Oil Release Valve And Indicator; Oil Pipes; Crankcase Scavenge Pipe; Valve Rockers, Rocker Spindles And Push Rods - Triumph SPEED TWIN 1945 Workshop Instruction Manual

OIL
R E L E A S E V A L V E A N D I N D I C A T O R
!
This u n i t is very reliable and should require no m;intenar.ce other than cleaning.
1
Vv'hen'the oil i s changed it i s advantageous t o dismantle this unit and thoroughly
wash
it
i n petrcl t o ensure that the piston works freely i n the release valve body.
Under n o circumstances should the release valve springs be t2mpered w i t h as t h e
spring poundage is set t o give the correct o i l pressure. Should
it
be necessary t o
/I
. '
replace these springs at any time, gencine Triumph spares should be obtained.
Fig. 5.
I N D E X
1 I n d i c a t o r Shafc 5
A u x i l i a r y S p r i n g
8
C a p W a s h e r
2 V a l v e C a p 6 S h a f t N u t 9 B o d y
3 R u b b e r Seal 7 Piston 10 B o d y W a s h e r
4
M a i n S p r i n g
I,
,
OIL
PIPES ( T A N K T O E N G I N E )
When replacing the oil pipes t o the rubber connections, care must be exercised t o
prevent chafing the inside of the rubber connection. Failure t o observe this may
result i n a small piece o f rubber entering the o i l system, which, o n reaching the o i l
pump would cause lack of pressure t o the crankshaft. Foreign matter i n the scavenge
pipe line above the pump would be returned t o the tank (in exceptional cases
it
may
block the rocker oil feed) and i s prevented from entering the o i l system by the tank
filter.
!,'
C R A N K C A S E S C A V E N G E PIPE
I n the unlikely event o l this cracking o r an a i r leak bctwcen the pipe and the crank-
case, the oil will not scavenge from the crankcase. Trouble of this k i n d would only
make itself known when the engine
i s
hot.
A
simple method by which the tube can
be tested
i s
t o first remove the crankcase sump plate and filter and then attach a
length of rubber tubing over the scavenge pipe. Place t h e open end of the rubber
tube i n the mouth and suck. I f the tubing collapses, this w i l l prove the air tightness
of the scavenge pipe. O n the other hand if the tube does not collapse, a leak
i s
evident. To rectify this fault, the e'ngine must be removed from the frame and
stripped.
V A L V E R O C K E R S , R O C K E R S P I N D L E S A N D P U S H R O D S
The o i l feed t o the rocker spindles
is
supplied from the scavenge side of t h e main o i l
i
supply.
Lack of lubricant t o the rockers can only be caused by a stoppage i n the o i l
! pipe line.
The obvious course
i s
to
remove the pipe and check by forcing air through
it.
T o check the oil supply
a t
the spindle, r u n the engine
rill ir
i s
warm t o increase
the o i l temperature and then slacken off the t w o acorn nuts, which secure the o i l
2 8