Control Of Rear Lift Linkage (Rll); Control Elements Of Rll With Hydraulic Lift; General Information On Control Of Rll With Hydraulic Lift - Belarus 922.6 Operator's Manual

ATTENTION: WHEN OPERATING ON ROADS WITH HARD SURFACE, IT IS RE-
QUIRED TO DISENGAGE THE FDA DRIVE IN ORDER TO PREVENT INCREASED
WEAR OF FRONT WHEEL TIRES!
TRACTOR OPERATION WITH FDA DRIVE ENGAGED WHEN THE TRAVELLING
SPEED IS ABOVE 13 KM/H IS FORBIDDEN!
ATTENTION: VIOLATION OF RULES FOR USING FDA DRIVE OPERATION
MODES MAY RESULT IN BREAKDOWN OF FDA PARTS AND OTHER PARTS OF
TRANSMISSION!
2.18 Rear lift linkage control
2.18.1 RLL control elements with hydraulic lift
RLL is controlled by two handles 1 and 2 (Figure 2.18.1), located in the cab on hy-
draulic lift control panel 3.
Draft control handle 2 is located first after operator's seat and has following positions:
- forward most position – maximum soil cultivation depth ("9");
- rear most position – minimum soil cultivation depth ("1").
Handle position range 2 is numbered from 1 to 9.
Position 1 control handle has the following positions:
- rear most position ("1") – RLL transport position;
-forward most position ("9") – minimum distance between an implement and ground.
Handle 1 position range is numbered from 1 to 9.
1 – position control handle; 2 – draft control handle; 3 – hydraulic lift control panel.
Combined control is carried out by way of implement penetration depth limiting by
handle 1 during operation in the draft control mode.
2.18.2 General information about control rules for RLL with hydraulic lift
Hydraulic lift linkage of your tractor is equipped with hydraulically operated lift and
ensures operation of rear lift linkage in the following modes:
- lift of an attached implement and its lowering under self-weight;
- position control (automated holding of an attached implement at a specified position
against the tractor);
- draft control (adjustment of cultivation depth depending on the soil reaction);
- combined control (adjustment of cultivation depth depending on the soil reaction
with limitation of maximum depth by position control).
Position control allows accurate and sensitive control of position over the ground of
an attached implement such as spraying machine, land smoother and other. Position control
can be used with tillage implements on flat fields. Use of position control in the fields with an
uneven surface is limited due to unavoidable vertical travel of the implement when the trac-
tor is driven along the field undulations.
Draft control is the most appropriate mode of operation with mounted and semi-
mounted implements, working attachment of which are sunk into the soil. The system is
sensitive to changes of drawbar power (caused by change in soil reaction and processing
Figure 2.18.1 – RLL control elements
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922.6-0000010 OM