Gear Shifting In Transmission With Mechanical Gearbox And Reverse-Reduction; Gear - Belarus 80.1 Operation Manual

2.13.3 Gear shifting in transmission with mechanical gearbox and reverse-reduction

gear

Control elements of the gearbox with the reverse-reduction gear are shown in figure
2.13.3.
1 – diagram of gearbox reverse-reduction gear stages shifting; 2 – lever to control
gearbox reverse-reduction gear; 3 – lever to shift gearbox ranges and gears; 4 – gearbox
ranges and gears shifting diagram.
Gears shifting is carried out by two levers: lever to shift gearbox ranges and gears
3 (figure 2.13.3) and lever to control reverse-reduction gear 2.
Selection of the required reverse-reduction gear ranges, gears and stages (forward
movement stage – symbol "forward", reverse stage – symbol "reverse") is carried out in
accordance with shifting diagrams 4 and 1, as shown in figure 2.13.3.
Gears and stages shifting is carried out by one lever 3, while at the beginning
range (I or II) is engaged, then the lever is shifted into the position "N", selected gear is
engaged.
Lever to control reverse-reduction gear 2 shall be in the engaged (fixed) position
during tractor operation: forward – forward movement stage ("forward"), or backward - re-
verse stage ("reverse"). It is possible to keep the lever of the gear reduction unit in a neu-
tral (middle non-fixed) position to facilitate starting the engine at low temperatures.
ATTENTION: THERE IS NO REVERSE GEAR IN THE GEARBOX OF THE TRAC-
TOR EQUIPPED WITH THE REVERSE-REDUCTION UNIT. SELECTION OF DRIVING
DIRECTION IS CARRIED OUT BY ENGAGEMENT OF THE CORRESPONDING STAGE
OF THE REVERSE-REDUCTION UNIT!
ATTENTION: SHIFT GEARBOX RANGES AND GEARS ONLY ON STOPPED TRAC-
TOR WITH THE CLUTCH PEDAL FULLY DEPRESSED!
ATTENTION: REVERSE-REDUCTION GEAR STAGES SHIFTING FROM FORWARD
MOVEMENT TO REVERSE AND FROM REVERSE TO FORWARD MOVEMENT IS CARRIED
OUT ONLY AFTER TRACTOR IS FULLY STOPPED AND WITH THE CLUTCH PEDAL FULLY
DEPRESSED!
The velocity diagram table of tractor "BELARUS080.1/82.1/820" on tyres of basic
configuration, equipped with the gearbox with reverse-reduction gear (gear ratio 1,07) is
mounted on the right glass of the cabin and is shown in figure 2.13.4.
Figure 2.13.3 – Gearbox control
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80-0000010B OM