Steering Hydraulic Cylinder - Belarus 3522.5 Operator's Manual

The protective valve 6 limit maximal pressure in delivery line within the limits of
17,5... 18,0 MPa. The anti-shock valves 7 limit pressure in cylinder lines in impact condi-
tions.
Pressure of anti-shock valves should be adjusted between 22 and 23 MPa.
The air inlet valves 8 ensure necessary delivery of working liquid in hydraulic cylin-
der in emergency operation and at activation of anti-shock valves.
The dosing pump of forward motion 2 is double capacity pump and have additional
gerotor tilt unit of smaller volume for control of guide wheels turn in emergency operation
(when feed pump is out of run).

3.15.3 Steering hydraulic cylinder

The tractor is equipped with FDA with two hydraulic cylinders 3 (figure 3.15.3) and
steering tie rod 4, mounted behind FDA.
Cylinder rods are connected through cones 1 with pivoted levers 2 of wheel-hub
drives housings and hydraulic cylinders bodies are connected with boss arrangements
made on FDA casing. In eyes of hydraulic cylinders and in rod heads are installed spheri-
cal joints 5, that should be periodical lubricated through ball-valve oilers 6.
1 – cone; 2 – lever of wheel-hub drive; 3 – hydraulic cylinder; 4 – steering tie rod; 5 –
sperical joint; 6 – ball-valve oiler.
Figure 3.15.3 – FDA with two hydraulic cylinders in steering linkage and steering tie
rod.
Steering hydraulic cylinder consists of body 3 (figure3.15.4), rod 4, piston 1, cover
6 and cap nut 8. The piston is fixed on rod with nut 15, which is locked by punching of land
in rod 4 slot. In eyes of body and rods are installed spherical bearings 7, that have chan-
nels in inner race for lubrication of slide surfaces though oiler. In cover 6 are installed seal
9 (wiper seal), rod guides 13, that exclude friction of rod and cover and rod packings 10.
On piston is mounted integrated seal 14, that exclude friction of piston and cylinder liner.
1 – pison; 2, 12 – sealing ring; 3 – body; 4 – rod; 5 – lock screw; 6 – front cover; 7 –
spherical bearing; 8 – cat nut; 9 – rod seal; 10 – rod packings; 11 – safety ring, 13 – rod guide,
14 – piston seal; 15 – piston nut.
Figure 3.15.4 – Steering hydraulic cylinder
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