Belarus 1221.2, Руководство оператора

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BELARUS- 1221.2/1221В.2/1221.3 Aggregation
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Stage V
Checking the possibility of motion of the tractor aggregated with the machine including
checking the turn angles and maximum height of lifting of the mounted attachment until it
rests against the tractor members, sufficiency of the length and free space of the cardan
shaft when performing turns and transferring the machine to the transport position.
Stage VI
Assessment of the correspondence of the power capabilities of the tractor and power
required by the machine (draught resistance and power consumption including that
through the PTO). The assessment may be performed by the calculation tee given the ini-
tial data or based on the test report.
Stage VII
Checking the possibility of performing the work by the machine aggregated with the
tractor.
a. Trial aggregation for performing the jobs in accordance with the purpose of the ma-
chine and with obligatory observance of the safety requirements.
b. Checking the fitting of the tractor within the row-spacing of the crops to be cultivated
with determining:
• the correspondence of track and tyre profile width;
• agrotechnical clearance;
• protective zones to the tyres.
Stage VIII
Checking the total cross-country ability, static stability on slopes and efficiency of brakes
under local conditions:
a. possibility of overcoming the ups and downs by the tractor with the machine loaded
with process material;
b. possibility of motion along the slope.
Assess the clearance value and steerability of the tractor aggregated. During the motion,
the front wheels of the tractor shall not be taken off the road surface. The front axle of the
tractor shall perceive at least 20% of the load (steerability criterion К
s
≥ 0.2 ) from its own
operating weight in any case of its use.
Stage IX
Carrying out the control shifts for the purpose of determining the operating characteris-
tics:
a. time and labour intensity of forming the MTA;
b. average operating speed;
c. productivity per 1 hour of basic (shift, operating time);
d. volume of the work performed for the reference time;
e. hourly (specific) fuel consumption.
3.4 Checking the correctness of forming the machine-tractor aggregate
The operation of the tractor with the aggregated machines being either overloaded or
underloaded shall not be allowed. In the first case, there will be increased wear of the
parts of the tractor, excessive fuel consumption and decrease of the productivity of the ag-
gregate while in the second case there will decrease of the economic characteristics and,
particularly, productivity and increase of the fuel consumption. Therefore, the tractor driver
shall first of all make sure that the MTA has been formed correctly and its recommended