MTZ 1220.1, Руководство оператора

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MTZ 1220.1/1220.3 Section D. Construction and Operation
D55
Rear Hitch Linkage (RHL)
The second-category three-point hitch linkage
with the third-category connecting points
serves for ganging the mounted and semi-
mounted agricultural machines and imple-
ments with the following coupling members:
• the length of the suspension axle “ А ” (con-
ventional distance between the joints of the
lower rods) is 870/1010 mm, respectively,
for the 2
nd
and 3
rd
category;
• the diameter of the holes of the rear joints
of the lower connecting rods is equal to
37.4 mm.
• the diameter of the pin of the upper rod is
31.75 mm.
ATTENTION! Prior to ganging the machines,
read carefully this section.
The tractor is equipped with the one-piece
connecting rods (1) with the length of 885 mm
and the upper rod (2) with the third-category
joints. For operation with the second-category
machines, the SPTA kit of the tractor contains
the adaptor bushings (3) for the lower rods for
the suspension axle of the implement
∅
28
mm and adaptor bushings and fingers
∅
22
mm and
∅
25 mm for connecting the upper rod
to the implement.
Upper rod and angle braces
The length of the upper rod (2) is adjustable
within 500...740 mm by means of the handle
(3).
The RHL is provided with two gear-type (ad-
justable) angle braces. Their length can vary
within 580...665 mm by rotating the handle
(1).
When the tractor is shipped from the manufac-
turer, the length of the both angle braces is set
to the standard value of 640 mm.
To facilitate the change of the angle brace
length, their fork is provided with two holes for
setting the pin.
IMPORTANT! Adjust the position of the
machine by means of the right-hand angle
brace only.
To follow the relief of the field area to be
treated when working with wide-cut machines
and to avoid damage of the angle braces,
connect the angle braces (4) with the lower
rods (5) through the slots (indicated by an ar-
row).
IMPORTANT! When doing this, the slots of
the angle brace fork shall be behind the
hole as seen in the direction of the tractor
forward travel to avoid the damage of the
angle brace.
To increase the RHL carrying capacity, the
forks of the angle braces and the tie-link ear
can be repositioned by one hole backwards.
In this case, the length of the tie-links shall be
increased by inserting an additional shackle
from each side.