back
to
the oil sump through over
flow
oil pipe.
9.1 Oil pump
Four and six cylinders engine all use gear type oil pump. The structure
of
four cylin-
der engine is
show
in Fig. 11.
The oil pump should be installed in the tunnel on the upper part
of
the
main bearing.
The oil
pump
transmission gear is driven by
the
crankshaft gear trough
the
idling
gear. The turning speed is the same as the crankshaft.
'When
the
oil pump is being mounted,. not too hard or deviated stress on
it,
the
seal
ring should
be coated
with
lubricating oil so as not
to
be
damaged.
9. 2 Overload overflow valve
(1)
3
2
The overload overflow valve should be installed in
the
oil groove
of
the
engine block,
as
seen in Fig. 12,
to
limit the
low
temperature and
the
high viscosity
of
the
oil,
protect·the oil pressure gauge, thus assure
the
oil
pump
and
the
lubricating tube
work
normally. The overload overflow valve has been adjusted through
the,
special
test
platform before
use,
so you
neednt
adjust again on general.
If
the
oil pressure is
too
low,
you should regulate
the
regulating valve in the oil filter
first,
then youtest and regulate this pressure regulating valve,
it's
'opeing pressure is
O.8MPa.
Fig.
11
Oil pump
1.
Oil pump shell 2. • O·
type
seal ring
3. Oil pump cover
4. Half circle
key
Fig.
12
Overload overftQw valve
1.
Nut
2.
Fetaining
plug
3. housing
4.'
Spring S. Steel ball
5.
Driving
ohaft
9ubassornbly
6. Bolt 7. Gasket
8.
Driven
gea~s
subassembly
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