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
147
4.12 Dismounting of components of two-wire pneumatic drive of trailer brakes
Attention:
Before starting disassembly of components of trailer brakes’ pneumatic drive, release
compressed air from the system. To do this, pull upwards ring for condensate release valve 9
(Figure 4.181).
Dismounting of cylinder 4
(Figure 4.178):
а ) unscrew cap nut 2, screws of collars 7, disconnect from cylinder 4 hose 8 and pipeline 1;
b) unscrew nuts 10, remove collars 3 and cylinder 4;
с ) unscrew check nut 5 and disconnect pressure regulator 6 from cylinder 4.
Figure 4.181
Dismounting а brake valve 4 (Figure 4.182):
a) unscrew cap nuts 2 and 7, disconnect from brake valve 4 pipelines 3 and 8;
b) unpin pin 1 and tie-rod 5, pull out pin 1, remove tie-rod 5;
с ) unscrew bolts 6, remove brake valve 4
Figure 4.182