Steering Hydraulic Cylinder - Belarus 1822.3 Operator's Manual

1 – stator; 2 – rotor; 3 – spool; 4 – driving shaft; 5 – sleeve; 6 – safety valve; 7 – anti-
shock valves; 8 – air-inlet valves; 9 – return valve; 10 – casing. I – tilting unit; II – valve group
The gerotor tilting unit I (figure 3.14.3) consists of stator 1, which is attached to the
casing 10, and of a rotating rotor 2 connected with spool 3 through the driving shaft 4. The
valve group II consists of a casing 10, a sleeve 5 and a spool 3, having a splined connec-
tion with the driving shaft end extension of the steering column.
The safety valve 6 limits max. pressure in the charging line within the limits of 14,0...
14,5 MPa. The anti-shock valves 7 limit pressure in the cylinder lines under impact load.
Pressure of anti-shock valves is to be adjusted within 20 and 22 MPa.
The air inlet valves 8 provide for the necessary delivery of the working liquid to the
hydraulic cylinder at emergency operation and as the anti-shock valves go off.

3.14.3 Steering hydraulic cylinder

The tractor is equipped with FDA with two hydraulic cylinders 3 (figure 3.14.4) and
a steering tie rod, mounted behind the FDA.
Cylinder rods are connected with pivoted levers 2 of the wheel gear group housings
through cone pins 1, and the hydraulic cylinder bodies are connected with a cylinder
bracket 6, which is mounted on the FDA casing. Spherical joints 4, that require periodical
lubrication through grease cups 5, are installed in the eyes of the hydraulic cylinder bodies
and in the rod heads.
1 – cone pin; 2 – lever of wheel gear group; 3 – hydraulic cylinder; 4 – sperical joint;
5 – grease cup; 6 – cylinder bracket.
Figure 3.14.4 – FDA with two hydraulic cylinders in the steering linkage and a steer-
ing tie rod.
Figure 3.14.3 – Dosing pump
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