MTW BELARUS 952.5, Руководство оператора, Страница: 123 / 188

952.5-0000010 OM
123
4.5 Usage patterns of tractor hydraulic system for driving of operated parts
and other elements of unitized hydraulically operated machines and aggregates
Hydraulic control system for implements mounted on tractor “BELARUS-952.5” pro-
vides means for oil extraction for operation of the implements coupled. Meanwhile the fol-
lowing variants are possible:
- oil extraction by unilateral and bidirectional hydraulic cylinders (hereinafter referred
to as hydraulic cylinders);
- replenishment of oil volume in a tank caused by flooding of cylinder and fittings
chambers shall be assured after trial of performance of the hydraulic system of the tractor
with an implement;
- oil extraction for hydraulic motors drives (hereinafter referred to as hydromotors),
in this case the implement applicability shall be obligatory agreed with tractor manufac-
turer’s work.
While operating hydraulically operated machines with hydraulic motor its drain pipe
must be connected to a special tractor output to ensure free oil drain into the tank by-
passing distributor. In case of its absence, connect the drain pipe to oil tank through fill
plug.
ATTENTION: FOR ENSURING OF THE REQUIRED ROTATIONAL SPEED OF
THE HYDRO MOTOR OF THE IMPLEMENTS COUPLED CERTAIN OIL SUPPLY IS
NECESSARY. HYDRAULIC FLUID FEEDING ON THE TRACTOR “BELARUS-952.5”
DEPENDS ON THE ENGINE RPM, THEREFORE IMPLEMENT HYDRAULIC DRIVE
MUST BE EQUIPPED WITH ITS OWN FLOW ADJUSTING VALVE!
In case of use of outputs of tractor hydraulic system for maintenance of the imple-
ment coupled, it is necessary to ensure the required volume of oil in a tank. Extraction of
oil by cylinders of the implement coupled should not exceed 8 liters.
Excessive oil extraction during coupling causes load increase on hydraulic system
of a tractor. At long-term use of a hydraulic drive it is necessary to track a temperature
range in a hydraulic system.
Level check in a tractor hydraulic tank and its refill shall be carried out with re-
tracted cylinder rods (plungers) of the tractor as well as implement coupled. You must not
fill in the oil when cylinder rods (plungers) are pulled out as it can result in the tank over-
flow and blow-out of elements of a hydraulic drive by the excessive oil being displaced
from cylinders at the subsequent lowering (raising) of the working attachments.
Major characteristics of tractor “BELARUS-952.5” HLL for working attachments
drive of other components of the hydraulically operated implements and units coupled are
shown in Table 4.11.