Belarus 1221.2, Operator'S Manual

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BELARUS-1221.2/1221 В .2/1221.3 Description and operation
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Hydraulic Cylinders of the Steering Gear Mechanism
Two hydraulic piston cylinders (9, 13) (Fig.
E-40) enable the driver to turn the front
steering wheels of the tractor; they are in-
stalled in front of the FDA (14).
Hydraulic cylinder rods are connected to
the front wheel reduction gears through
tapered fingers, and the cylinder tubes are
attached to the FDA housing on brackets
(15). The FDA housing has a number of
holes intended for re-arrangement of cyl-
inder tubes when adjusting the front-wheel
tracks.
Spherical joints are installed in the cylin-
der tube lugs and in the rod heads. These
joints require regular lubrication through
specially provided pressure lubricators (re-
fer to Section M: “Scheduled Mainte-
nance”).
HSU of a Reversible Tractor (BELARUS- 1221В.2)
The HSU of a reversible tractor is a modi-
fication of the “Belarus” 1221 HSU and
includes all its components, namely:
• • Two steering wheel hydraulic cyl-
inders installed on the tractor’s FDA;
• Measuring pump mounted on the
steering wheel column;
• 14…16 cm
2
/rev. feed pump mounted
on the engine.
Besides, to make a turn when «in re-
verse» mode, an additional steering post
is installed on the cab rear wall, in as-
sembly with a measuring pump. Also pro-
vided is a “forward travel-reverse”
changeover valve, which is mounted on a
safety screen between the engine and the
cab, at the left, if viewed in the direction
of the tractor forward travel.
Connected to the valve are oil ducts from
the feed pump and the discharge ducts
from measuring pumps for forward and
reverse travel.
The HSU schematic is made so that,
when changing over from forward travel
operation to the run “in reverse”, and
conversely, it is necessary but to set the
“forward travel-reverse” changeover valve
lever to the required position.
To reposition the steering wheel, unscrew
the steering wheel lock knob, put the
steering wheel on a respective steering
column (either forward or reverse travel,
as required) and lock it at a height con-
venient for operation.
Recommendations for using . Prior to
starting the engine, it is necessary to
make sure that the reverse cock handle
has been set to the position correspond-
ing to the selected direction of travel of
the tractor.
IMPORTANT! The reverse cock shall be
only repositioned when the engine is not
running to avoid the feed pump breakage
or rupture of the oil discharge pipeline of
the steering control.