KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
32
Both leading axles
have wheels with low-pressure tyres installed. Tyres 28,1R-26 of model
FD-12 are installed on K-744R1 tractors; tyres 30,5R-32 of model F-81 are installed on K-
744R2, K-744R3, K-744R4 tractors.-
Tractors K-744R2, K-744R3, K-744R4 may have pneumatic tyres 1050/50R25 installed, they
have 172 load index and А8 speed index.
The
tractor turn control system
has a power drive.
The tractor turns using two hydraulic cylinders due to swinging the tractor semi-frames
against each other around the vertical hinge pivot. On new tractors, the total free play in the
connections of “hydraulic cylinder - semi-frame lifting eyes” (along the hydraulic cylinder axis)
can not exceed 0.9 mm. The permissible total free play in the course of operation shall not
exceed 1.8 mm. The feed of working fluid to the hydraulic cylinders, which is proportional to
the angle of turn and the rotational speed of the steering wheel, is performed by the steering
mechanism RM 2000 installed on the steering column.
A pump with adjustable flow rate is installed in the hydraulic system of the operating equip-
ment.
Two pressure filters provide cleaning of the working fluid to be fed from the pumps to the hy-
draulic system units.
Diagram of the hydraulic system for steering control and mounted implements is given in Ap-
pendix 2.
The
frame
consists of two semi-frames, the front and the rear one, connected by a hinge
pivot device. The semi-frames can rotate against each other around the horizontal and verti-
cal hinge pivots.
Cabin
has a built-in protection framework, is all-metal, two-seat, air-tight, noise-proof, with
extended visibility sector. It has heating, ventilation, air conditioning and audio systems. The
cabin is fitted with one entry door on the left side. Cabin door and side window and almost
completely transparent and fitted with convenient small vent windows.
