
8.Check whether the thermostat is in good order.Examine
the
water dropping
out
from a
weep hole
of
the water pump.It is necessary to renew the water
seal,if
flowing
out
too much
of
water.
9.Check the wiring contacts
of
the electric equipment to see
whether
they are connected
firmly and well.Bumt marks should be removed.
1O.After
every]
,000 accumulated operating hours,add the following items;
(1
)Make an overall check
on
all parts and components.Make necessary adjustments and
repairs.
(2)Dismantle the dynamo and starting motor.Clean out
the
dirty grease in
the
bearings and
refull thern with clean grease.Check the pinion
of
starting motor.
II.After
every 1,500 accunulated operating hours,add the following items:
(t
)Rernove the cylinder head,check the valve and valve seats and
other
parts
of
cylinder
head asselnbly.
(2)Remove the carbon
d~posits
on the surfaces
of
cylinder head,liner, piston
and
piston ring,
etc,and wash down them.
(3)Check and measure wear
of
the pistons and piston rings.
(4
)<.-:heck
and rneasure
wear
of
the cylinder liner.
(5)Check and measure \vear
of
the crankshaft main journals and crank pins.Clean lube oil
passages
of
the crankshaft.
(6)Check \vear
of
the Inain bearing and connecting- rod bearing shells.
(7)Clean oil passages
of
the cylinder block and replace lube oil.
IV
.Preservation
and
Stora2e
of
En2ine
If
the engine
is
to be put
out
of
service for a cOlnparatively long period
of
time,it is
necessary to
preserve it according to the follo\ving procedure:
I.After the engine stops and still does not cool
yetdrain
out conlpletely the lube oil,cold
water and fuel itnrnediately.Clean the oil sump and oil strainer.
2.Clear out the dust and oil on the engine surface.With antirust oil sinear all the unpainted
exposed surfaces
of
engine except rubber and plastic parts.
3.Heat the filtered lube oil
10 )
10
120
'C';
..
until all bubbles in the surface
of
oil disappear.
~rhen
pour the dehydrated oil
Into
the oil sunp until oil level reaches the upper mark.,and turn the
engine,in order to nlake sure that the lube systenl
is
cOlnpletely tilled up with this oil.
.1-3
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