Hydraulic gear shift control system diagram:
1 - oil cooler;
2 — pressure accumulator piston;
3 — pressure accumulator valve;
4 - oil pump;
5 - oil filter;
6 — oil pan;
7 — regulator;
8 - drain valve;
9 - check valve;
10 - servo drive of the band brake;
11 — pressure regulator valve;
12, 23 — pressure increasing valves;
13 — mode selector;
14 — valve for controlling switching from III to II gear;
15 — valve for switching from 1st to 2nd gear;
16 — control valve for shifting 1st and 2nd gears;
17 — valve for controlling the shifting of II and III gears;
18 — valve for switching II and III gears;
19 — connection point of the control pressure gauge;
20 — pressure limiting valve;
21 — gear shift control valve;
22 — throttle valve of the forced reverse switching system.
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