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cause
dirt particles to
separate
from
the oil and set1le on the walls
of the
centrifuge body
and cover.
F
or
this reason,
.
t he centri'fuge
must be cleaned
after
every 10000
km
run.
Fuel
System
The
fuel
system
includes
the following: petrol tank, three-way
cock
with
filter a
nd
settler,
two carburettor,s, air
cleaner,
air duct
and
petwl
pipelines.
Petrol Cock
with
Settler
The
petrol
cock
is screwed into
the threaded bushing
of
the
pet-
rol
ta
nk. Provided
in
the
lower
part
of the cock is
settler
5-
(Fig.
12)
with
filter g
a uze
8.
P etrol
is fed
throu
gh
on
e of two
petrol
pipes
12 and
13
of different height.
Fig.
12. Petrol
cock:
1
-
body;
2
-
knob
;
3
-
slide
valve;
4
-
slide valve
scaling gasket;
5
-
settler;
6
-
filter
bowl;
7
-filter
spring;
8-
filter
gauze;
9
-
settle
r
sealing gasket;
10
-
sea
ling
gasket of petrol cock body;
1I-
threaded bushing;
12
-
petrol pipe for
reserve fuel;
13
-
petrol
pipe for
main
fuel
Inside
the
cock
body
is
slide
valve
3
having one axial a
n
d two
radial
holes. One of them, a through one,
is
matched
with the
hole
of
a
higher petrol pipe (main fuel),
and
the other
coincides with the
channel of a lower petrol pipe (reserve fuel).
At
the
other side
of the
body are
fitted
two
unions
for
connection
of fuel supply r ubber
hoses extending
to the
carburettors.
The
cock
knob may be
set to
one ·of the
following positions
(Fig.
12):
0 -
cock is open;
3-
cock is closed;
P-
cock is open
for
con
-
sumption
of
reserve fuel.
The reserve
fuel
capacity
is
equal to 2
1.
3
.
8004
33
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