Belarus 1523, Operating Manual

Page: 117 / 312

BELARUS-1523/1523 В /1523.3 /1523В.3 Construction and Operation
112
The wheel reduction gear (1) consists
of a doubled joint, spur-gear and plane-
tary drives, levers for controlling the
turning of the front wheels.
The doubled universal joint (24) (see
Figure “Wheel reduction gears”) is con-
nected with the FDA differential by
means of half-axle shaft with splined
ends (13) (see Figure “FDA”) from the
one side and with the driving gear (17)
from the other side (see Figure “Wheel
reduction gears”) of the spur-gear drive.
The driving gear is mounted on the
two taper roller bearings (18). One of
them is installed in the counterbore of
the reduction gear casing (35) and an-
other – in the carrier (22). The doubled
universal joint is fixed in the pinion by
means of the washer (15) and bolt (14)
with a bent-out plate.
The bearings (18) are adjusted by
means of the shims (21) which are
placed between the carrier and the re-
duction gear casing.
The driving gear of the wheel reduc-
tion gear is in mesh with the rear block
(driven gear of the spur-gear drive) (34)
the second crown of which is a sun gear
or driving part of the planetary series.
The driven part of the planetary series
connected with the tractor wheel is the
wheel flange which is spline-connected
rigidly with the cage (5) by means of
three satellites (11), while the epicyclic
gear (12) serves as a braked gear per-
ceiving the reactionary torque.
The epicyclic gear is mounted in the
reduction gear and fixed against turning
by three pins (13). An additional gasket
is placed between the cover and casing
of the reduction gear. The sun gear is
mounted on the wheel flange, on the
two-row taper bearing (33) which is fixed
from the one side by means of the thrust
ring (36) being in contact with the cage
and from the other side – by means of
two locking rings (31, 32).
The satellites rotate on the shafts (7)
mounted in the counterbores of the cage
(5). The cylindrical rollers (8) serve as
satellite bearings. One race of the rollers
is the ground surface of the shaft (7)
and another is the ground internal sur-
face of the satellite (11).
The satellites and rollers are kept
from displacement in the axial direction
by the washers (10). The force fit in the
connection of the cage with the shaft is
used for keeping the satellite shafts from
the axial displacement. The screw (9)
turned into the grove of the shafts
serves for checking the correctness of
the press-fitting and additional fixation.
The wheel flange is mounted in the
two roller bearings. One of them is
mounted in the reduction gear cover (6)
and the other – in the carrier (30) which
is installed in the counterbore of the re-
duction gear casing, closed by means of
the cover (28) and fastened to it by
means of the bolts. An additional gasket
is inserted between the carrier and the
cover.
The bearings are adjusted by tighten-
ing the nut (26). The washer (27) is
placed between the bearing (29) and the
nut (26). To prevent the nut from turning
out, the nut shoulder is punched in the
slot of the wheel flange.
The reduction gear casing shall be
filled with oil to the lower edge of the fill-
ing hole, into which the plug (39) is in-
serted (see Figure “FDA”). To drain oil,
unscrew the draining plug (40).
The internal cavity of the wheel re-
duction gear is sealed by means of the
collars (3) (see Figure “Wheel reduction
gears”) and (20). The mud trap (4) is in-
stalled for preventing the penetration of
mud to the working edges of the collar
(3). The counterbores of the steering
knuckle and splines of the doubled uni-
versal joint shall be sealed by means of
rubber rings (19, 23, 25). For maintain-
ing the normal pressure in the reduction
gear cavities, the reduction gear casing
is provided with a breather (16).