MTZ 1220.1, Operator'S Manual

Page: 154 / 244

MTZ 1220.1/1220.3 Section I. Coupling of implements
I 8
Lifting device has connecting yokes cor-
responding to DH-2V
и DH-3V according
to the purpose. Yoke of DH-2 В is located
at 160 mm or 110 mm from PTO shaft end
and allows carrying significant vertical
load with sufficient longitudinal stability of
the aggregate. Yoke of DH-3
В is located
at 400 mm from PTO shaft end and allows
coupling of semitrailed and trailed with ac-
tive drive ensuring increased angle be-
tween the tractor and the device at turn of
the aggregate. To achieve the required
controllability criterion, vertical load on the
yoke DH-3V is decreased as compared to
DH-2V.
Lifting device of the guide rods are de-
signed according to the requirements of
the International Standards, therefore it is
possible to install connecting segment of
different design (a hook instead of a yoke
and etc.).
DH-1 М -01 (draw bar) is designed for
coupling of the implements with active
drive of working attachments. At that drive
of Cat 2 and 3 is ensured (connecting
segment is located at 400 mm or 500 mm
from PTO shaft end).
Taking into account that DH-2V, DH-3V
and DH-1
М
-01 have specific fixed position
according to the hight, draft pole of semi-
trailed implements shall be equipped by
adjustable support under the current
Standard.
In case there is no adjustable supports in
the implements in operation, such sup-
ports may be ordered in PA “Bobruiska-
gromash” and installed in household.
The front lift linkage of LL-2 type is similar
to that of the rear one as to its design. It is
mounted in place of the front counter-
weights and serves for making up the
combined aggregates (a cultivator in front,
seed planter in the rear, etc.), for mount-
ing the echeloning implements (forward
and side-mounted mowers, and others) as
well as for transporting the certain ma-
chines from amongst rear-mounted com-
bined aggregates in case of long trips.
PTO and drive of the machines
In case of correct location of aggre-
gated machines power intake shaft (PIS)
relatively to the tractor PTO, the cardan
shafts of the standard design can be in-
stalled.
The rear PTO shaft provides a syn-
chronous machines drive (active semi-
trailers, planting machines etc.), alongside
of it the use of the shank type is not impor-
tant.
The motion speed should not exceed
10 km/h.
To avoid the overloads of the PTO drive
when aggregating with the inertial ma-
chines (pickup balers, fodder harvesters,
etc.), it is necessary to use the cardan
shaft with the overrunning clutch on the
PIS side.
When using the rear PTO shaft at 540
rpm and front PTO shaft at 1000 rpm it is
necessary to install a protective coupling
from the PIS side, which limits the power
take-off over the allowable values (not
over 50-60 kW, respectively). It is possible
to install the protective coupling also to
protect the drive from overloading.