The rear mounted attachment of the standard size НУ-2 is manufactured according to
State Standard ГОСТ 10677 (corresponds to category 2 according to ISO 730/1). The main
parameters of the rear mounted attachment specified in the technical data are given for fit-
ting the tractor with the standard size of the basic tyres with the standard static radii speci-
fied by the tyre manufacturer.
The rear mounted attachment consists of three rods (one upper and two lower ones) the
front ends of which are coupled by means of joints with the tractor and the rear ends of
which are coupled with the free joints for connecting with the link pins of the aggregated ma-
chines. It is intended for coupling the rear-mounted machines to the tractor, transmission of
tractive force during the operation and adjustment of their position during the operation or
motion in the transport state.
The mounted attachment provides the aggregation of the following types of the machines
and implements:
- mounted ones using the three-point mounting (upper and lover rods);
- semi-mounted (lower rods);
- semi-trailed using the crossbar on the mounting axle (lower rods).
The external limit rods with adjustable length serve for preventing the attached machines
from swinging.
The following adjustments of the rear mounted attachment in the vertical and horizontal
planes by means of the upper rod, braces and limit rods are provided for ensuring the re-
quired position of the machine:
A. Altering the length of the upper rod
- equal penetration (equalizing the depth of travel of the tools located one after another in
the direction of the tractor motion); if the frame of the mounted plough is tilted forward as
seen in the direction of the tractor motion and the front plough body ploughs deeper than the
rear one does, elongate the upper rod and shorten the same, if the front body ploughs with
less deeply than the rear one does.
B. Altering the brace length.
- position of the machine in the horizontal plane;
- uniform operating depth provided by the tools of the mounted machine over the grasp
width;
Important: The length of the left brace of the mounted attachment is 475 mm and not to
be altered without special necessity, usually the length of the right brace is to be adjusted.
When using the crossbar on the mounting axle and operating one-way ploughs, the length
of the braces shall be equal.
D. Altering the length of both braces and upper rod for the transport position of the
machine.
- clearance: at least 300 mm;
- sufficient safe distance between the members of the tractor and those of the machine
excluding the contact of the machine members with the tractor (the clearance shall be at
least 100 mm).
Е. Altering the length of both braces
- when transporting the machine (with the top position of the mounted attachment), the
limit rods shall be shortened to the maximum extent within the existing adjustment for limit-
ing the swinging of the machine during the motion to avoid the damage of the tractor mem-
bers in possible emergencies;
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