BELARUS-1221.2/1221
В
.2/1221.3 Description and operation
85
Clutch control (BELARUS-1221
В
.2)
I. Forward run
The clutch is disengaged by stepping on
the pedal (1), Fig. E-
11а
acting upon the
operating cylinder (2) of the hydraulic
booster (6) and then upon the rod (9) and
lever (10) of the shaft of the clutch disen-
gagement forks. The hydraulic booster
reduces the efforts needed to press the
pedal when disengaging the clutch; also,
it controls the travel of the lever (10) in
proportion to that of the pedal.
On releasing the clutch pedal, all the
clutch control components return to their
initial position by the force of contracting
springs (4, 8). To operate the hydraulic
booster, a discharged oil flow is used
supplied from the HSU metering pump
through pipeline (12). After the hydraulic
booster the oil is drained in to the HSU
reservoir via the discharge oil pipeline
(11).
With the engine inoperative, the control
train functions as a mechanical one (Fig.
E-11).
Fig. E-
11а.
Clutch control of a reversible tractor:
1 – clutch pedal; 2 – operating cylinder with a rod; 3 – axle; 4, 8 – contracting spring; 5 – hose; 6 – hydraulic
booster; 7 – bracket; 9 – rod; 10 – lever; 11 – discharge oil pipeline; 12 – delivery pipeline; 13 – backward
spring; 14 – overhung pedal; 15 – pin; 16 – axle; 17 – boot; 18 – bracket; 19 – piston rod; 20 – piston; 21 –
master cylinder; 22 – oil pipeline; 23 – cap; 24 – overflow valve.
II. Reverse.
The hydrostatic drive consisting of an
overhung pedal (14) with backward spring
(13), master cylinder (21), oil pipeline
(22), and operating cylinder (2) with a rod
is used in this case.
The clutch is disengaged by means of the
pedal (14) which acts on the piston rod
(19) and piston (20) of the master cylin-
der. Under the action of the piston, the
fluid passing through the oil pipe (22) and
hose (5) causes the hydraulic booster (6)
pushrod to move and, thus, to release the
clutch in the manner described for the
forward run of the tractor. As this takes
place, the body of the service cylinder (2)
and the rod as well as the pedal (1) re-
main stationary in the initial position.
Содержание 1221.2
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Страница 290: ...BELARUS 1221 2 1221В 2 1221 3 Supplement 293 Electrical scheme of tractor connections ...
Страница 291: ...BELARUS 1221 2 1221В 2 1221 3 Supplement 294 Variants of tractor connections ...
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