Mechanism Of Engine Start-Up Lock With Range Engaged And Mechanism Of Fda Disengagement When Reversing; Gearbox Control Mechanism; General Information; Speed Shifting Mechanism - Belarus 1822.3 Operator's Manual

3.3.2 Mechanism of engine start-up lock with range engaged and mechanism
of FDA disengagement when reversing
To prevent the possibility of engine start with the tractor speed engaged a special
locking device is installed. It consists of a switch 6 (figure 3.3.3), a pin 8, a rod 2, axis 3,
balls 4, 11. As the range is engaged the lock mechanism opens contacts of the switch 6
and breaks the circuit of interposing starter relay and the solenoid starter switch. To adjust
the switch 6 it is necessary to mount a required number of adjusting shims 7; if the adjust-
ment is not effected by mounting a required number of shims, then it is needed to replace
the switch and repeat the adjustment.
ATTENTION: BEFORE STARTIING THE ENGINE SET THE RANGE SHIFTING
LEVER INTO NEUTRAL POSITION!
To disengage the FDA as the tractor reverses there is a device, which consists of a
pin 15, a spring 16, a switch 18.
When the range shifting lever is set into neutral and any range of forward travel is
engaged (the range shifting lever is in front position), the contacts of the switch 18 are
open.
As the reverse range is engaged (the range lever is in back position) the contacts of
the switch 18 are closed and the FDA drive automatic control turns off, accordingly.
To adjust the switch 18 it is required to mount a required number of the adjusting
shims 17, if the adjustment is not effected by mounting a required number of shims, then it
is needed to replace the switch and repeat the adjustment.
1, 15 – pin; 2 – rod; 3 – axis; 4, 11 – ball; 5, 10, 14, 16 - spring; 6, 18 – switch; 7, 17
– adjusting shim; 8 – pin; 9 – guide member; 12 - washer; 13 – bolt.
Figure 3.3.3 – Mechanism of engine start-up lock with range engaged and mecha-
nism of FDA disengagement when reversing

3.3.3 Gearbox control mechanism

3.3.3.1 General information

The mechanism of gearbox control consists of a speed shifting mechanism and a
range shifting mechanism with an electrohydraulic system of switching between the higher
"H" and lower "L" passes of the gearbox reduction unit.

3.3.3.2 Speed shifting mechanism

The speed shifting mechanism is mounted in the speed group, the fork housing 65
(figure 3.3.2) and in the control mechanism case 1.
In the cage 53 carriers with the attached forks shifting the first, the second and the
fifth, the sixth speeds are installed. The carriers are secured in the cover be means of ball
locks. The fork position on the carriers is adjusted with the help of hexagon fit bolts and
locked with wire.
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2022.3-0000010 OM