Tractor Composition - Belarus 2022.6 Operator's Manual

1.3 Tractor composition

Tractor framework is semi-frame.
Undercarriage – front and rear wheels are driving, with pneumatic tires of low pres-
sure. Front wheels are steering. Rear wheels can be twinned by means of a spacer.
The tractor is equipped with a 4-stroke piston six-cylinder inner combustion engine
with in-line vertical arrangement of cylinders, with direct injection of diesel fuel and com-
pression ignition, corresponding to environmental requirements of Stage 4.
The system of engine lubrication is combined, some parts are lubricated under pres-
sure, some – by spattering. The lubrication system consists of an oil sump, oil pump, liq-
uid-oil heat exchanger, centrifugal oil filter and oil filter with paper filtering element.
The engine fuel supply system consists of the following parts:
- accumulator system of fuel supply Common RAIL, including a high-pressure fuel
pump, injectors, a fuel accumulator under high pressure, sensors of the engine working
environment condition (pressure and temperature of fuel and air), electromagnetic actuat-
ing mechanisms (fuel governor, electromagnetic injection valves), electronic unit of control
and communication check circuits, low-pressure pipelines, high-pressure pipelines;
- fuel fine filters;
- fuel coarse filters.
The system of engine start-up is an electric starter. A means of start-up facilitation
under low environmental temperatures are heating plugs.
The system of air delivery consists of a turbocharger, an air pipeline and a system of
inlet air cooling.
The turbocharger is executed as follows: a radial centripetal turbine and a centrifugal
single-stage compressor with a cantilever arrangement of wheels in relation to supports.
The system of air purification consists of a dry-type air cleaner with a built-in unit
"monocyclone" and two paper filtering elements. Air ingress with an air-cleaner is per-
formed through the "monocyclone" unit which provides preliminary inertial air cleaning at
the expense of tangential inflow and centrifugal forces, arising at spiral air rotation in rela-
tion to the axis of many small separate slots of "monocyclone" unit, discharging large-size
dust particles.
The cooling system for inlet air is of a radiator type. The CAC radiator is intended for
cooling the air, charged into the inlet collector.
The cooling system is closed-type with coolant compulsory circulation carried out by
a centrifugal pump. The water pump is driven by a V-belt from the crankshaft pulley. Two
thermostats TC-107 mounted at the delivery line are provided for acceleration of engine
warming-up after start-up and for automatic control of a temperature mode at various load-
ings and ambient temperatures.
To provide the required chemical composition of exhaust fumes, corresponding to
ecological requirements of Stage 4, the exhaust fumes system is additionally equipped
with two stages of selective catalytic reduction (SCR1, SCR2).
The coupling clutch is frictional, dry, two-disk, spring-loaded. The clutch pads are ce-
ramic-metal. The coupling control drive is hydrostatic with a hydraulic booster.
The gearbox is 24Fх12R, mechanical, step-by-step, with constant-mesh gears, shift-
ing of gears within the ranges is carried out by means of synchro-mesh units; switching
between ranges is carried out by toothed clutches.
Shifting of GB reduction unit ranges is electrohydraulic.
15
2022.6-0000010 OM