MTZ 1220.1/1220.3
Section D. Construction and Operation
D4
Installation of charged air cooler (CAC)
The charged-air cooler 5 is mounted in
front of the water radiator (14) and is
linked to the turbocharger (15) and engine
intake manifold (16) through the system of
air pipelines (1,4,10) and pipes (3,5,11).
The CAC is an air heat exchanger, con-
sisting of a core as finned aluminum
pipes, tanks and connection tubes. Air is
delivered to the CAC from the turbocharg-
er, cooled inside it to improve power-
efficient and ecological parameters of the
engine and further comes to the engine air
intake.
Fig. D-4. CAC installation:
1,4,10 – air pipeline; 2,6 – clamp; 3,5,11 – pipe; 7 – seal; 8 – washer; 9 – bolt
М
8
х
16; 12 - nut; 13 – cooler
(CAC); 14 – water radiator; 15 – turbocharger; 16 – diesel engine intake manifold.
The engine lubricating system is com-
bined (Fig.D5): some parts are force-
lubricated; others are splashed lubricated.
The bearings of crankshaft and cam shaft,
bushing of intermediate gear, crankshaft
rod bearing of compressor, valves drive
mechanism (rocking arms) and turbo-
charger shaft bearing are lubricated by the
oil pump under pressure. Sleeves, pis-
tons, piston pins, barbells, pusher, cam
shaft claws and fuel pump drive are lubri-
cated by spraying.
The full-flow oil filter with complete filter
element and liquid-oil heat exchanger is
installed to diesel engines
Д
-245.2S2. The
plan of lubricating system is on figure
Д
-5.
The oil pump takes oil from the crankcase
1 through the oil Figk-up 8 and delivers it
through passageways in the cylinder block
to liquid-oil heat exchanger, and then to a
full-flow oil filter where oil is purified from
foreign substances, wear products and oil
decomposition products through heating
and oxidation.
The purified oil comes from the oil filter to
the oil pipeline of the diesel engine.
The overflow (reducing) valves are in-
stalled:
- in the housing of the liquid-oil heat ex-
changer - 11 (actuation pressure –
0,15
05
.
0
+
MPa);
- in the oil filter - 13 (actuation pressure –
0,15
02
.
0
±
MPa);
During diesel engine start with cold oil,
when the oil flow resistance in the liquid-oil
heat exchanger exceed 0,15…0,2 MPa,
overflow valve opens and oil is delivered to
the oil filter, bypassing the liquid-oil heat
exchanger. When the resistance in the oil
filter is 0,13…0,17 MPa, the oil filter overflow
valve opens and oil comes to the oil pipeline,
bypassing the oil filter. The overflow valves
are not regulated.
The safety regulated valve 14 is in-
stalled to the filter housing. It is used to
maintain the oil pressure in the main oil
pipeline within the range 0,25...0,35 MPa.
The surplus oil is delivered through the
valve to the diesel engine crankcase.
Summary of Contents for 1220.1
Page 1: ...MTZ 1220 1 1220 3 1220 1 0000010 OM OPERATOR S MANUAL 2010...
Page 161: ...MTZ 1220 1 1220 3 Section I Coupling of implements I15...
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