The details of the engine structure尧
assembling尧 adjustment尧 using and
maintenance can be consulted in the
operating specification of relevant en鄄
gines.
Inlet air尧 exhaust systems
Brief description of the struc鄄
ture
Inlet system includes air inlet pipe
assembly尧 air filter assembly尧 air in鄄
take of engine and intake manifold,
some has intermediate transition pipe
in addition. Exhaust system includes
exhaust pipe尧 muffler and exhaust
tailpipe.
Air filter
The linkage between the air inlet pipe
and the air filter assembly is flexible.
The pipe is fixed on the rear part of
the cab, and it can be moved to鄄
gether with the cab when tilting the
cab. It is shown in the figure on the
next page. The function of air filter is
to filter out the dust and the sand in
the air entered into the engine.
Air filter is cyclone dust gathering air
cleaner with paper filter element. Af鄄
ter external air enters into the air filter
through the air inlet pipe, larger dust
particle can be separated from the
air by the function of cyclone vane,
then can be thrown into the dust
gathering plate, the separated air
keep on moving and enter into the
cylinder by the filtering function of
the paper element.
For every 1000km running, check
and maintain the air filter. When run鄄
ning in the condition of excessive
dust, the running mileage interval for
inspection and maintenance should
be shortened suitably.
Cleaning of the air filter:
1. Remove the dish-shaped nut from
the end cover. Take away the end
cover, remove the inner nut and take
off the filter element assembly.
2. Clean the cover cap and the inner
part of the housing with dry and
clean cloth. When cleaning, do not
let the moisture enter into the air fil鄄
ter.
20
HFC1020
series trucks
3. Check and clean up the dust ex鄄
haust bag on the end cover, make
sure that it is not in disrepair and in鄄
validation.
4. Clean the air filter element: clear
away the dry dirt or dust with com鄄
pressed air gun (air pressure should
be less than 690kpa),blow from the
inner side of filter element towards
outside, or pat the end surface on
the flat board. Do not clear away the
dirt or the dust with beating or knock鄄
ing. If found blocking of the filter ele鄄
ment because of long use尧dilapida鄄
tion on the surface of filter element or
the element is polluted badly by the
oily soil, the filter element must be re鄄
placed.
Using and inspection of inlet
and exhaust systems
1. The service life of the engine has
great relationship to the workmanship
of the air filter. Absolutely forbid that
the engine works without air filter or
on the condition that the air filter is
disabled. Taking the intake opening
of air filter as the original intake open鄄
ing is forbidden.
2. For every 1000km running, check
the inlet and exhaust manifold for the
following:
荫
Check nuts for looseness, when
tightening the nut on the inlet and
exhaust manifold, the torsion force
should be equable, or else the air
leakage can occur.
荫
Check the inlet and exhaust mani鄄
fold for crack and hole, check the
1尧cab; 2尧vent hose(1) of the air filter;
3尧intermediate connecting pipe;
4尧connection board; 5尧vent hose of the air
filter; 6尧right longitudinal member of the
frame; 7尧air filter bracket; 8尧intake
pipeline of the air filter;
9尧connecting hose; 10尧air filter
schematic diagram of air filter
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