Belarus 1221.2, Руководство оператора

Страница: 105 / 295

BELARUS-1221.2/1221 В .2/1221.3 Description and operation
104
“Wet” Brakes and Rear Axle Differential Lock Clutch (Option)
The tractors can be equipped with multi-
ple-disk service and parking brakes oper-
ating in an oil bath.
The rear axle differential lock clutch is
mounted in the brake casing and shares
a common oil bath; therefore it also made
as a “wet” one.
The arrangement of the brakes and lock
clutch is shown in Fig. E-21.2.
Fig. E-21.2. “Wet” brakes and differential lock
1 – brake casing; 2 – friction disk; 3 – intermediate disk; 4 – pedal axle; 5 – protective boot; 6 – pressure
disk; 7 – ball; 8 – parking brake; 9 – cover; 10 – gasket; 11 – parking brake shaft; 12 – drain plug; 13 – brake
casing; 14 – gasket; 15 – O-ring; 16 – final drive pinion; 17 – lock clutch; 18 – boss; 19 – adjusting bolt; 20 –
cover; 21 – adapter; 22 – inspection and filler plug; 23 – sealing boot; 24 – O-ring.
Service brakes
The service brakes are of 8-disk type. The
friction disks (2) are installed in splined
ends of the hub drive pinions (16). The
pressure disks (6) are similar in design to
those used in dry brakes, but with a re-
duced angle of gradient for balls, to en-
sure the required force of compression of
the packs of the friction and intermediate
packs.
Attention! The pressure disks of dry and
“wet” brakes have the same physical and
fixing dimensions, but they are not inter-
changeable. It is strictly prohibited to in-
stall the disks designated for dry brakes
on “wet” brakes or vice versa. Otherwise,
the safety of tractor operation could be
substantially jeopardized.
The intermediate disks (3) are fixed from
turning in their cases (1, 13) by means of
shoulders made over the outer profile. The
leak-proofness of the oil baths is ensured
by the O-rings (15, 24), gaskets (10, 14)
and rubber boots (5, 23). The cases are
provided with inspection (22) and drain
(12) plugs.