Front Driving Axle - Belarus 1221B.2 Operator's Manual

BELARUS-1221.2/1221В.2/1221.3
Rear axle
Main gear: a pair of bevel gears with
spiral tooth.
Final drives: a pair of spur gears for
each sideboard.
Rear-axle drives: planetary type.
Differential lock: Oil-actuated friction
clutch
Brakes
Service Brakes: on rear wheels: two-
disk or three-disk, dry with mechanical
servo drive. Disk diameter: 204 mm (or
eight-disk, operating in oil sump (on
order))
Parking brake:
through differential lock on final drives
and rear-axle drives. Dry-disk type with
mechanical hand control. Disk diame-
ter: 180 mm (or 4-disk, operating in oil
sump (on order))

Front driving axle

Type: two-point, portal
Main gear type: bevel gears with spir-
al tooth.
Differential type: self-locking, exces-
sive friction
Final gears type: planetary
Drive gear type: built in GB single pa-
rallel-shaft reduction gear unit with hy-
draulically operated multiplate clutch;
cardan shaft.
Hydraulic distributor of FDA control:
hydraulically operated,
electrically controlled
PTO drive
Type: independent, two-speed and
synchronous
Drive clutch: Planetary reduction gear
with band brakes
On rear wheels
spool-type,
Drive: Mechanical, by lever on control
panel
PTO end speed:
Independent drive
I — 540 rpm; N=60 kW (82 h. p.),
II — 1000 rpm; N=90 kW (123 h. p.)
Synchronous drive
4,36 rev/meter of travel when fitted
with tires 16,9R38.
4,17 rev/meter of travel when fitted
with tires 18,4R38.
Output shaft: SAE standard 6-spline
for 540 rpm and 21-spline for 1000
rpm.
Rotation: Clockwise
Steering
Type: hydrostatic (H.S.).
Feed pump: NSH14, gear-type, left-
handed rotation.
Volume constant — 14-16 сm
Metering pump type — gerotor type
models: Danfoss; Rexroth Hydraulic;
Lifam.
Volume constant – 160 сm
Relief valve pressure— 14 МPa (140
2
kgf/сm ).
Antishock valves pressure — 20 МPa
2
(200 kgf/сm ).
Actuating mechanism: two hydraulic
bilateral cylinders.
Bore — 50 mm,
Cylinder stroke— 200 mm
Steering wheel range of adjustment:
• in angle of slope - from 40° to 25°
with fixation on every 5°,
• in height – within the range of 100
mm.
Backlash in the steering wheel not
less than 25°.
19
Technical data
3
/rev.
3
/rev.