MTZ 1220.1/1220.3
Section D. Construction and Operation
D2
Air purifier (fig.
Д
-2 ) of Donaldson com-
pany of dry type using one paper filtering
element. It has three stages of cleaning.
The first stage - inertia air cleaning (in-
built monocyclone). It is carried out inside
the air purifier at the cost of centrifugal
forces, emerging by air spiral rotation with
relation to the axis of the case (1) of the
air purifier. Dust is discharged through a
rubber cap (5), mounted on the cover (4)
of the air purifier, as the engine is stopped
and started, at the cost of excess pres-
sure, emerging inside the air purifier. The
second and third stage is dry cleaning
with the main (6) and control (7) paper
filtering elements. Air is fed through the
air intake (3). The air is delivered to the
turbocharger through the air pipeline by
means of a delivery pipe 2.
The Coarse Fuel Filter with a screen filter
element cleans the fuel from mechanical
impurities and water. The sludge is
drained from the filter through a draining
plug located in the bottom part of the bowl
housing.
Fig. E-2. Air purifier: 1-housing; 2-delivery pipe; 3-
air intake; 4-cover; 5-rubber cap; 6-main paper
filterung element (MFE); 7-control paper filtering
element
(CFE).
.
Fine fuel filter (fig.
Д
-1) has a replaceable
paper filtering element. The filtering ele-
ment is mounted in the filter housing.
The fine fuel filter is intended for multiple
usages subject to regular replacement of
filter elements and rubber gaskets and
observance of the operating instructions.
To bleed air from the engine fuel feed cir-
cuit, the filter bowl is provided with a plug
(26), refer to Figure below.
The fuel is injected into the cylinders by
the closed-type injectors (19) with five-
bore nozzles.
The
diesel
fuel
injection
(high-
pressure) pump is of in-line four-plunger
type providing the metering of fuel by
changing the fuel-feed end point.The
pump is provided with a pneumatic anti-
smoking adjuster and driven off the crank-
shaft through valve control gearing.
The fuel pump forms an integral unit with
a fully-variable all-speed governor and a
piston-type fuel-booster pump.
Mechanical centrifugal all-speed direct ac-
tion regulator with automatic increasing of
fuel feed during diesel engine start.
The Fuel-Booster Pump (3a) is mounted
on the fuel injection pump body and driven
by the camshaft eccentric.
For bleeding the air from the feed system,
a hand- operated piston-type lift pump is
provided, and the plugs serve for bleeding
the air from the fuel-pump head The fuel
supply is controlled by means of the pedal
and lever.
The fuel pump parts are lubricated from
the engine lubrication system
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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