Hll Pump Control - Belarus 922.6 Operator's Manual

depth soil) through upper link. Hydraulic system responds to these changes by lifting and
lowering of an implement in order to maintain the intended drawbar power at a fixed level.
The system responds to compressive force and extension force in the upper link i. e. it is
double action system.
Combined control – if due to variations in soil density draft control does not allow
reaching of constant processing depth, the predetermined depth should be limited by means
of position control handle.
Position control shall be carried out as follows:
- set handle 2 (Figure 2.18.1) of draft control to the forward most position in the direc-
tion of tractor travel;
- set the required height of the implement above the ground by means of handle 1 of
position control.
Number "1" corresponds to transport position of RLL, and number "9" – to the mini-
mum height of the implement above the ground.
Draft control shall be carried out as follows:
- set handle 2 of draft control to the forward most position in the direction of tractor
travel (number "9" of the control desk);
- connect the implement with RLL by means of handle 1 of the position control;
- after entering the groove shift handle 1 to the forward most position and by means
of handle 2 set the required soil processing depth;
- while leaving and entering the grove again (during tilling) use only handle 1 of posi-
tion control, and do not touch handle 2 of the draft control.
If due to variations in soil density draft control does not allow reaching of constant
processing depth, the predetermined depth should be limited by means of position control
handle 1 (combined control mode), keeping in mind the corresponding number on the con-
trol desk.
When combined control is used the degree to which signals of the two sensors
(force sensor and position sensor) are combined is controlled by handles 1 and 2.
ATTENTION: BEFORE LEAVING THE TRACTOR FOR ANY PERIOD OF TIME
YOU MUST GROUND THE IMPLEMENT!

2.19 HLL pump control

The HLL pump switching handle 1 (Figure 2.19.1) is located in the setting region of
starter 2 on the left tractor side and has two positions:
"HLL pump on" – when handle 1 is moved forward as viewed in the direction of trac-
tor motion;
"HLL pump off" – when handle 1 is moved backward as viewed in the direction of
tractor motion.
HLL pump actuation diagram is shown in Figure 2.19.1. It is also given in the instruc-
tion plate at the bottom of the cab front side on the left side as viewed in the direction of
tractor motion.
1 – HLL pump switching handle; 2 – starter; 3 – HLL pump actuation diagram.
off on
Figure 2.19.1 – HLL pump control
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922.6-0000010 OM