BELARUS-1021/1021.3
Operating manual
20
Front driving axle
Type: portal.
Main drive: bevel pinions with circular-arc tooth.
Type of differential: self-locking, high friction.
Final drives: two-stage with cylindrical and planetary stages;
FDA drive: from a transfer case by two driveshafts with an intermediate bearing;
FDA control: mechanical by a lever under operator’s right hand. Has 3 operating modes:
- FDA off;
- FDA on/off automatically;
- FDA on forced
Power takeoff shaft (PTO) drive
Type: independent two-speed and synchronous.
Drive: mechanical, planetary reducer with control belt brakes.
Control: electrohydraulic, with a combination of switches on the right control panel.
PTO end speed at independent drive:
- I — 540 rpm at 2,040 rpm of diesel engine;
- I — 1,100 rpm at 2,160 rpm of diesel engine;
Synchronous drive:
- 4.17 revolutions per meter of travel with 16.9R38 tires installed.
- 4.33 revolutions per meter of travel with 18.4R34 F11 tires installed.
- 4.45 revolutions per meter of travel with 11.2R42 tires installed.
PTO change end:
- for 540 rpm — 8 slots according to GOST 3480 or 6 slots according to ISO 500
- for 1,000 rpm — 21 slots according to GOST 3480 and ISO 500
Direction of rotation: clockwise when viewed from the shaft end.
Hydraulic lift linkage (HLL)
Type: remote-cylinder type, with open center.
Maximum pressure in the hydraulic system: from 18.5…20 MPa
Distributor: section type, 3-valve with a spring-loaded neutral, with a fixed floating position,
forced lowering and lifting. Low force on the levers when controlling the distributor provides
precise movement of an implement. Oil flow and speed of the rod in the cylinder are linear and
proportional to the movement of the operator’s hand.
Hydraulic system outputs: left and right side, rear; free discharge.
The system provides the following hitch control modes: height, power, position, mixed (power +
position control).
Hydraulic lift: a device equipped with a regulator distributor and two plunger cylinders.
Rear hitch linkage (RHL):
Type: four-bar linkage of category 2
Lifting capacity at a distance of 610 mm from the suspension axle 27.5 kN (2,750 kgf)
min at a pressure of 16.7 MPa.
Towing coupler
Lift type TSU-3-V; a fork with a possibility of vertical travel in steps of 65 mm; a
crossbar at the ends of the lower rods and a draw bar
Distance from ground to horizontal axis of towing yoke on standard tires — (400 ± 10) mm
Opening — (70.0 ± 2.5) mm
