Belarus 1523, Руководство по эксплуатации

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BELARUS-1523/1523 В /1523.3 /1523В.3 Construction and Operation
77
The actuator consists of the master
cylinders (10) (for forward motion) and
(19) (in the reverse mode), overhang
pedals (7) (for forward motion) and (20)
(in the reverse mode), tap (22) (for
automatic switching from the forward
motion to the reverse mode or vice
versa), service cylinder (30), hydraulic
booster (39), lever (45), reservoir (1),
connecting tubings and oil pipes.
The flow-type hydraulic booster (39)
is intended for reducing the force to be
applied to the pedals (7) and (20) for
disengaging the clutch. It is connected
with the oil discharge flow of the HPS
metering pump via oil pipe (11), and with
the drain into the HPS reservoir via hose
(46).
On stepping on the pedal (7) in the
forward motion mode, the brake fluid is
passed from the master cylinder (10)
through the tubing (25) to the tap (22). In
the tap (22), the piston moves to the
rightmost position and closes the input
of the tubing (21). Then the brake fluid is
passed through the flexible hose (24) to
the working cylinder (30) while moving
the piston lifter (31). The piston lifter (31)
acts upon the piston lifter (32) of the hy-
draulic booster (39) that causes the op-
eration of the hydraulic booster and ad-
vancement of the piston and rod (41) ro-
tating the lever (45) connected with the
clutch release shifter that in turn causes
the disengagement between the engine
and the transmission.
On stepping on the pedal (2) in the
reverse mode, the brake fluid is passed
from the master cylinder (19) through
the tubing (21) to the tap (22). In the tap
(22), the piston moves to the leftmost
position and closes the inlet of the tub-
ing (25). Then the brake fluid is passed
through the flexible hose (24) to the
working cylinder (30) and acts as de-
scribed above.
The “Neva-M” brake fluid, ТУ 2451 -
053-36732629-2003 is used as a working
fluid in the clutch actuator system.
Clutch Control Adjustment
1. Adjusting the clearance between
the piston and the piston lifter (9) of the
master cylinder (10) (for forward mo-
tion):
- Set the initial position of the pedal
(7) by means of the adjusting bolt (3)
and fork (5) having kept the dimension
“B”;
- Adjust the clearance between the
piston lifter (9) and the piston of the
master cylinder (10) by means of the
fork (5). When doing this, the travel of
the pedal (7) from the initial position to
the moment of contact of the piston lifter
(9) with the piston as measured at the
centre of the pedal boot shall corre-
spond to the dimension “G”;
- Tighten the nuts (4, 8) and fix the
pin (6) with a cotter pin;
2. Adjusting the clearance “J” be-
tween the piston and the piston lifter
(12) of the master cylinder (19) (for
working in the reverse mode):
- Remove the boot (13);
- Unlock the piston lifter (12);
- Screw the piston lifter (12) of the
master cylinder (19) into the fork (15)
having kept the dimension “F”;
- Tighten the nut (14) and refit the
boot (13);
- Adjust the free travel of the pedal
(20) as measured at the centre of the
boot to the dimension “E” by turning the
bolt (17) in and out for ensuring the
clearance between the piston lifter (12)
and the piston of the master cylinder
(19);
- tighten the locknut (18);
3. Adjusting the clearance “K” between
the piston lifter (31) of the service cylinder