cap, or obtaining a stronger spring, but no such alterations should be effected
without first obtaining advice from the Works.
The pump draws its supply of oil from the hottom of the sump through
an internal filter and large diameter suction pipe and delivers oil at high
pressure into an internal oil duct, which runs across to the off side of the
engine, where
it
feeds into the forward end of another internal duct running
to the rear crankshaft bearing.
Oil
grooves in this bearing and drilled passages
in
the crankshaft conduct the oil to each big-end. These are in consequence
fed with oil ~~nder high pressure. An external pipe from
the
pump delivery
duct extends vertically to the c>linder head where
it
encounters
a
restrictor
pin.
The
Oil
Restrictor.
The Restrictor pin is for th'e purpose of regulating the
oil fed to the overhead vnlve gear, and should on no account be damaged
or interfersed with.
Oil
passing the pin enters
a
drilled passage in the cylinder head which
registers with a similar passage drilled in the front camshaft be:~ring bracket,
communicating with the camshaft bearing itself and
each of the vnlve
rocker shafts. 'The valve rocker shafts are drilled at intervals to correspond
with the valve rock'ers, whose hushes are grooved, feeding drilled passages
passages in the rocker-arms which lubricate the faces.
The rocker shafts in addition feed the rear camshaft bearing with
:I
generous supply of oil, and
a
duct in the forward camshaft bearing impinges
a constant stream of oil on the camshaft drive gears. Surplus oil from the
1)
/l
PAGE
THIRTY-ONE
To Next Page
Loading...
