Oil Tank; Oil Pump - Triumph SPEED TWIN 1945 Workshop Instruction Manual

In the event of a lubrication fault, the followina causes have been listed t o assist
In
-
diagnosing trouble:-
OIL TANK
The level in the oil tank should be
I+" (4
cms.) below the filler cap. Further
a .
addition of oil will cause excessive venting info the primary chaincase due t o lack
of air space. Always ensure rhat the vent pipe i s clear as any obstruction wiil cause
a back pressure in the oil tank, which in turn wiil prevent adequate scavenging by
the oil pump, resulting i n an oil flooded crankcase.
OIL
P U M P
The only part likely t o show wear after a considerable mileage i s the oil pump block
which can be replaced very cheaply. The plungers and the pump body being con-
stantly immersed in oil, wear
is
negligible. It is unnecessary therefore, t o suspect
these parts if the lubrication is
a t
fault. Should the non-return valve balls not be
seating properly, the pump will not function satisfactorily. The remedy
i s
t o remove
the oil pump and unscrew the t w o plugs situated under the oil pump body t o remove
the balls and springs.
All
parts should then be washed in petrol t o remove any
foreign matter, and when replacing the balls they should be given a sharp tap onto
their seatings before re-assembly. Prime the pump with oil before fitting.
Slider, D r i v e Block
Feed Plunger
Scavenge Plunger
Body
I n t a k e Feed P o r t
I n t a k e Scavenge
Port
B a l l Valva Seating
Scavenge R e t u r n P o r t
Pressure
Feed
P o r t
Ball, P u m p Valve
Spring, B a l l V a l v s
Body
Plug
Fig,
4. OIL
P U M P
-
27