Belarus 892 - Usage Patterns of Tractor Hydraulic System for Driving of Operated Parts and Other Elements of Unitized Hydraulically Operated Machines and Aggregates

892-0000010B OM
204
5.4 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 BELARUS-892/892.2 tractors
provides means for oil extraction for operation of the implements coupled. Meanwhile the
following 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 manufacturer’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 NECES-
SARY. HYDRAULIC FLUID FEEDING ON THE BELARUS-892/892.2 TRACTORS DE-
PENDS 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 implement
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 retracted
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 overflow 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 BELARUS-892/892.2 tractors HLL for working attachments
drive of other components of the hydraulically operated implements and units coupled are
shown in Table 5.41.