Belarus 921.6 Operator's Manual page 50

The BELARUS-921.6 tractor gears diagram plate, which is equipped with the syn-
chromesh GB with reverse gear, is installed on the cab's right windshield and shown in
Figures 2.15.8 or 2.15.9.
Figure 2.15.8 The gears diagram for the BELARUS-921.6 tractor on rear tyres
420/70R24, which is equipped with the synchromesh GB with reverse gear
Figure 2.15.9 The gears diagram for the BELARUS-921.6 tractor on rear tyres
14.9R30, which is equipped with the synchromesh GB with reverse gear
ATTENTION: FOURTH GEAR OF THE GB CAN BE ACTIVATED ONLY WHEN THE
GB II RANGE IS ACTIVATED WITH THE TRACTOR FORWARD MOVEMENT!
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921.6-0000010 OM