Belarus 1523, Operating Manual

Page: 107 / 312

BELARUS-1523/1523 В /1523.3 /1523В.3 Construction and Operation
102
interconnected by means of three equi-
distant intermediate gears (9) mounted
on the axles (7) pressed into the hous-
ing of the reduction gear (10).
The driving and driven gears have
splines holes through which they are
connected with the interchangeable tail-
pieces (15, 16) depending on the duty to
be performed: when in mesh with the
pinion (22), the rotational speed of 540
rpm is provided and when in mesh with
the pinion (23) – 1000 rpm.
The tail-pieces are supported in the ta-
per roller bearings (18) and locked
against axial displacement by means of
the thrust washer (13) and tail-piece
shoulder. To change the tail-piece, re-
move the washer (13), fit another tail-
piece and lock it. The marks “540” and
“1000”, respectively, are made at the tail-
piece ends. The PTO is engaged and
disengaged by the multi-disk friction
clutch and the PTO brake. Disks (3) fit-
ted with metal-ceramic liners are in-
stalled on the outer splines of the friction
clutch driving shaft (2) and steel disks
(4) are installed in cuts in the drum (5)
connected with the reducing gear driving
pinion (23) by means of splines. On en-
gaging the PTO, the piston (26) presses
the disks to one another under oil pres-
sure and connects in such a way the PTO
reduction gear with the driving shaft (2).
On disengaging the friction clutch, the
piston (26) returns to its initial position
under the force of the springs (7). The
independently controlled PTO brake
eliminates the tail-piece dragging and en-
sures its stopping. The brake is mounted
in the reduction gear housing (10) and
consists of a piston (24), friction plate
(6) and thrust plate (25). The friction
plate (6) is splined to the drum (5). On
applying pressure to the brake booster,
piston (24) presses the disks (6) and
(25) to one another and brakes the
drum and the PTO tail piece.
Note:
The axial clearance in the taper roller
bearings (18) shall not exceed 0.10 mm.
The adjustment shall be performed by
selecting the rings (19). The nuts (21)
shall be tightened with the torque of 220
N-m.
Rear PTO Control
The control is achieved by means of
handle (1) (see Figure “Rear PTO con-
trol”) of the switch located on the side
control panel. On moving the handle, the
lever (22) of the tap for controlling the oil
flow being fed to the PTO friction (26) by
means of the cable (6) and rod (12) (see
Figure “Rear power takeoff shaft”) and
PTO brake piston (24). To ensure the
smoothness of the PTO engagement,
the dumper (9) (see Figure “Rear PTO
control”) is installed at the friction input.
The handle (1) has two positions:
• foremost – “PTO Engaged”;
• rearmost – “PTO Tail-Piece Brake En-
gaged”;
The distributor lever (22) has two fixed
positions: the lower one “Brake applied”
and the upper fixed one “PTO en-
gaged”.
The PTO starts operation with the engine
running (if the transmission hydraulic
system is under working pressure).
To adjust the rear PTO controls, pro-
ceed as follows:
• Set the changeover handle (1) to the
rear position and the lever (22) of the
PTO control tap (13) to the bottom posi-
tion.
• Align the holes in the fork (3) and
switch lever (23) as well as in the rod
(12) and lever (22) of the PTO control
tap by changing the length of the cable