MTZ 1220.1, Руководство оператора

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MTZ 1220.1/1220.3 Section D. Construction and Operation
D12
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Fig. D-13. Synchronized Gearbox Control
1 – limiter; 2 — ball; 3 — spring; 4 — lever; 5 — cover; 6, 7 —levers; 8 — housing; 9 — sphere; 10 — boot;
11 fork; 12 — selector fork; 13 — spring; 14 — cover; 15, 16 — shafts; 17 — lever; 18 - link.
GB control mechanism
The GB control mechanism (Fig. E-13)
comprises the gear-shift and speed-range
change-over mechanisms. The gear-shift
mechanism is installed in the fork mem-
ber (6) (Fig. E-12) and in the casings (5)
and (8) (Fig. E-13). The engagement is
achieved through the lever (7), shaft (15)
and arm (4). The dogs (5) and (7) are in-
stalled in the fork member (6) (Fig. E-12)
with the forks (4) fixed thereto. To ex-
clude simultaneous engagement of two
speeds, the locking balls are located be-
tween the dogs (5) and (7). To hold the
forks (4) in the neutral and engaged posi- tions, the spring-loaded ball-point locks
(8) are provided.
The speed-range change-over mecha-
nism consists of a fork (11) of the range
change-over handle, lever (6), shaft (16)
and arms (17) located in the bodies (5)
and (8) as well as parts installed in the
transmission gearbox casing.
The toothed couplings (13, 26) (Fig. E-
12.1) and (3) (Fig. E-12.2) are moved by
forks (1, 4, 14) (Fig. E-14) attached on
the dogs (2, 5, 15), respectively. The
toothed couplings (13, 26) (Fig. E-12.1)
and (3) (Fig. E-12.2) are fixed in neutral
and engaged positions by the parts (8,
11,
12) (Fig. E-14).