Reverse-Reduction Gear; General Information; Composition Of Reverse-Reduction Gear - Belarus 80.1 Operation Manual

3.3.4 Reverse-reduction gear

3.3.4.1 General information

Reverse-reduction gear (figure 3.3.4) is tractor assembly unit, formed at the juncture
of two components of the transmission: clutch casing 12 and gearbox 10. It is intended for
quick change of tractor movement direction from forward movement to reverse and vice
versa on all GB gears, which allows tractor to operate in the mode of a "shuttle".

3.3.4.2 Composition of reverse-reduction gear

The reverse-reduction gear consists of mechanisms of two groups. The first group,
mechanical gears unit, includes mechanical toothed gears, which serve for transmission
and transformation of power flow. The second group, reverse-reduction unit control, in-
cludes mechanisms, the design of which provides the operator with high-quality control of
the reverse-reduction gear.
1 – cover of the reverse-reduction gear; 2 – synchronizer; 3 – small lever; 4 – roller with
fork; 5 – locking ball; 6 – cup; 7 – bushing; 8 – GB primary shaft; 9 – driven gear; 10 –
gearbox; 11 – front pocket; 12 – clutch casing; 13 – intermediate gear; 14 – planetary gear
axis; 15 – pin; 16 – planetary gear; 17 – roller bearing; 18 – output shaft; 19 – drive gear;
20 – cover; 21 – parallelogram mechanism; 22 – lever of reverse-reduction gear control
Figure 3.3.4 – Reverse-reduction gear
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80-0000010B OM