Minsk Tractor Works Belarus 1221.2, Руководство по разборке и сборке

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Disassembly-assembly manual for tractor BELARUS-1221.2/1221 В .2/1221.3/1221.4
163
Make adjustment of PTO brake bands during tractor operations in the following cases:
а ) PTO slips;
b) value of dimension “ А ” (Figure 4.210) in position “PTO off” (rod is drawn in) is less than 38 mm,
or in position “PTO on” (rod is extended) is over 74 mm.
External readjustment procedure:
If gaps in band brakes are adjusted, still PTO doesn’t transfer full moment; it means adjustment
margin is exhausted (substantial wear of brake bands’ lining).
In this case:
а ) dismount locking plate 10;
b) unscrew screws 6 (Figure 4.210) by 5…7 turns, turn eccentric shaft (5) of the external adjustment
mechanism by 180° and secure with locking plate 10 and bolt 9.
Make adjustment of brake bands’ gaps anew.
If fault is not eliminated, replace bands of PTO.
1 – lever; 2 – technological bolt; 3 – locking plate; 4 – bolt; 5 – eccentric axle; 6 – adjustment
screws; 7 – rod; 8 – locking plate; 9 – hydraulic cylinder
Figure 4.210