Belarus 921.6 Operator's Manual page 52

Figure 2.15.11 The gears diagram for the BELARUS-921.6 tractor on rear tyres
420/70R24, which is equipped with the mechanical GB with mechanical decreasing gearbox
Figure 2.15.12 The gears diagram for the BELARUS-921.6 tractor on rear tyres 14.9R30,
which is equipped with the mechanical GB with mechanical decreasing gearbox
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921.6-0000010 OM