KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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The
fuel system
consists of a fuel tank, hand fuel boost pump (in K-744R1St, K-744R2St, K-
744R3St, K-744R4St tractors - located under the cabin on the left in the direction of tractor
travel, at the vertical hinge pivot area; in K-
744Р2Pr, K-744R3Pr, K-744R4Pr tractors - com-
bined with the fuel strainer and located on the right at the rear beam of the cabin), fuel
strainer and fine mesh filter, high-pressure fuel pump with variable speed regulator, automat-
ic coupling for fuel injection advance, low-pressure and high-pressure fuel pipelines and noz-
zles.
The
exhaust system
has one silencer and connecting branch pipes.
The tractor
transmission
includes semi-rigid coupling and pump drive reducer, gearbox,
cardan drive, intermediate bearing and driving axles.
The
semi-rigid coupling and pump drive reducer
serve for transmission of torque from the
engine to the gearbox. The reducer also actuates the pumps of hydraulic systems for control
of turns and linkage as well as provides engine disengagement from transmission in case of
cold start. Two lifting eye-bolts are installed in the casing of the pump drive reducer for the
purpose of its installation and dismantling.
The
gearbox
is mechanical, multi-stage, four-mode, with constant-mesh gears, with a me-
chanical mode change drive and hydraulic gear change without power flow break-up within
any of the modes. It allows to change the tractor speed, drive in reverse, engage the rear
driving axle, transmit torque to the power take-off (PTO) as well as ensure actuation of the
steering control pump from the wheels when towing the tractor with faulty engine. Four lifting
eye-nuts are installed in the upper lid of the gearbox for installation and dismantling of the lat-
ter. A lifting eye-bolt is installed on the PTO coupling housing for the execution of similar op-
erations.
The
cardan drive
consists of cardan shaft of the gearbox, cardan shaft of the front axle, in-
termediate shaft of the rear axle, intermediate bearing and cardan shaft of the rear axle.
The
intermediate bearing
connects cardan shafts transmitting the torque from the gearbox
transfer shaft to the rear axle.
Both axles
of the tractor are driving and serve for increase of the torque to be driven to them
from the gearbox and for its transfer to the wheels. On the tractors, the front driving axles are
suspended to the frame on two semi-elliptic carriage springs with telescopic hydraulic shock
absorbers. The rear axles of all tractors are fastened rigidly to the frame.
The
service brakes
are dry, of block type, with a separate pneumatic drive to the front and
rear wheels; they are installed in rear-axle drives of the leading axles.
The
parking brake
has spring energy accumulators combined with service pneumatic
chambers of the front and rear axles.
