Calculating Method For Selection Of Implements For Coupling; Experimental Method For Selection Of Implements For Coupling - Belarus 1822.3 Operator's Manual

5.6.2.1 Calculating method for selection of implements for coupling

If a calculating method is used on the basis of input data and help technical litera-
ture, evaluation by corresponding formulas (listed in the reference books), comparison of
corresponding performance characteristics of a tractor and an implement, selection of the
implements are carried out, and then based on the data received the conclusion about
possibility of coupling with tractors "BELARUS-1822.3/1822 .3/2022.3/2022 .3". This
method may be recommended for approximate calculations when there is no experimental
data or when it is necessary to know immediately approximate structure of the machine
and tractor unit. As average values are used at calculations and all features of coupling
are not always considered, the unit made in such a way on the basis of a tractor may
sometimes appear not efficient and its may require further development in course of op-
eration in field conditions.
If a calculating method is used on the basis of reliable data and all power consump-
tion and environment are considered, it is possible to check carefully enough the possibility
of coupling of the implements with a tractor. It is recommended to do such operational cal-
culations before purchasing of a new implement.

5.6.2.2 Experimental method for selection of implements for coupling

When an experimental method for selection of implements and further composition
of units by practical inspection on the basis of the available operation documentation,
standardized and reference data, and also by taking into account accumulated experience
in the field of units composition directly in the given economy or the enterprise.
Reference data for selection of implements for coupling with tractors "BELARUS-
1822.3/1822 .3/2022.3/2022 .3" is the following:
- type and characteristics of processed soil and cultivated crops;
- fields sizes and relief;
- agrotechnical requirement for work being done (operational speed, agrotechnical clear-
ance, track, tires width, advance direction, operating weight;
- coupling method, vertical load on the device attached;
- drawbar resistance and power requirements of machine tool;
- haulage capacity and tractor power.
When coupling of machine and tractor unit it is extremely important to select a right
gear which the tractor should work in.
Certainly, it is beneficial to work at high speed, with wide grasp of and deep proc-
essing by working attachment of the implements mounted. But, unfortunately, it is impos-
sible to increase the speed of movement of the unit simultaneously with enhancement of
width and depth. The higher the operating speed, the worse tractive effort of the tractor,
hence it is necessary to diminish grasp width and depth of processing, and on the con-
trary. Do not forget that operating speed and depth of processing of the implements are
restricted to agrotechnical requirements!
Definition and assessment of possibility of coupling of the implements with tractors
"BELARUS-1822.3/1822 .3/2022.3/2022 .3" is made in several steps.
1. First step. Preparation and collection of data
Read the operation manual carefully. Determine main technical characteristics and
parameters of the tractor:
- drawbar category, nominal drawbar power;
- engine power;
- allowable power of mechanical and hydraulic extraction;
- type and coupling dimensions of DH or LL, PTO shaft end extension, hydraulic
outputs, appliance receptacles, pneumatic drive of trailer brakes;
- mutual bracing of PTO shaft end extension against axis suspension center of LL or
connection pin of DH;
- speed ranges
- admissible track width,
- availability of the required operating equipment;
- max. permissible weight of the tractor;
- gross weight of trailer towed;
- axle and tires weight limit.
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