Lubrication System And Oil Pump; Oil Filter - Robin America DY30 Service Manual

7-4
LUBRICATION SYSTEM and
OIL PUMP
Lubrication is forced lubrication
and
wholly fdtered system by trochoid type oil pump. The oil pump, and the governor are
assembled in one piece, which is fitted to the crankcase.
Revolution of the crankshaft is reduced by the reduction gear (1 : 1.4) of the pump; and from the main gallery oil is forcibly
lubricated to the crank journal. That oil
w i l l further be supplied to the crankpin, large end of the connecting rod, and then
splashed to the piston, small end of the connecting,rod, cylinder, etc. Also from the main gallery oil is forcibly supplied to
the cam shaft bearing and is sent t o cam lobe
of intake and exhaust valves and lubricate the tappets. In the camshaft oil
relief valve is assembled, and it adjusts the o i l pressure at 3 kg/cm2. Lubrication in the rocker chamber is conducted by the
splash of oil pushed u p by blow-by gas, which lubricates rocker arm, etc.
Furthermore, blow-by gas containing oil
will
pass through the breather, intake port and the cylinder, where it is finally burnt.
LUBRICATION CHART
r
I
r
I
BREATHER
1 - 1
INTAK: PORT1
I
t
COMBUSTION
I
*
t
1
I
$=I " !
C Y L I N D E R
k'
PISTON, BEARING
S M A L L E N D
O I L F I L T E R
Fig. 68
7 - 5 . OIL
FILTER
O i l filter is made of double sheets of wire netting, and it is less flow resistance type, and is called full-flow type. As the
element is made of wire, it can be washed and used for many times.
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