Application Of Rear Axle Differential Blocking; Doubling Of Wheels - Belarus 1822.3 Operator's Manual

Change of rated loading per tire depending on the speed is applied in cases when
the tire is not operated for a long time with high torque on the driving wheels. At field works
and other conditions of continuous operation under high torque you should use figures cor-
responding to the speed of 30 km/h. Tire pressure in excess of 0.16 MPa and under 0.09
MPa shall better not be used.

5.12.9 Application of rear axle differential blocking

The tractor rear axle differential provide means for driving wheels rotation with dif-
ferent rate that is necessary for moving along the curvilinear trajectory and along the rough
road, when right and left rear driving wheels travel over different distance for the same
time period.
The disadvantage of the differential is that it distributes the torque on the wheels in
inverse proportion to gripping abilities of the wheels. If one of the wheels gets in the area
with a low gripping ratio (to ice, for instance) it will skid, rotating with a higher speed
whereby the second wheel will rotate slowly. The tractor will move with a low speed. To
eliminate this drawback there is differential blocking (prevention from running) in an auto-
matic and positive modes.
Tractor operation with differential blocked on a firm and dry surface results in in-
creased loads of transmission components and chassis, and impedes maneuvering.
THE TRACTOR MUST NOT BE OPERATED WITH REAR AXLE DIFFERENTIAL
BLOCKING ENGAGED WHEN THE DRIVING SPEED IS IN EXCESS OF 13 KM/H!
THE TRACTOR MUST NOT BE OPERATED IN TRANSPORT POSITION ON THE
HARD-SURFACE ROADS WITH CONSTANTLY ENGAGED REAR AXIS DIFFERENTIAL
BLOCKING!

5.12.10 Doubling of wheels

To improve the passing ability and drawbar features during operation on boggy areas
on mellow soils (on waterlogged soils, in fields, prepared for seeding), doubling of the tractor
wheels is used. Doubling of wheels in combination with minimum ballasting in standard soil
conditions allows coupling with heavy-duty compound implements in fields with different slope.
ATTENTION: DOUBLE TIRES SHALL NOT BE USED FOR IMPROVEMENT OF LIFTING
AND DRAWBAR POWER AS THEY SERVE FOR PRESSURE RELIEVE DURING OPERATION
IN FIELD!
Effect of wheels doubling on the tractor drawbar dynamix on mellow soils appears as fol-
lows. In the area of the nominal drawbar power and at slow speed slipping is decreasing by 1.4
times and drawbar power is increasing. When operated with low hook drawbar power and at
high speed, the drawbar power of the double-wheeled tractor is less than of single-wheeled
tractor due to the increased rolling resistance.
ATTENTION: IT IS RECOMMENDED NOT TO USE TRACTOR COMPLETED
WITH DOUBLE WHEELS WITH TIRES FILLED WITH WATER SOLUTION AND WITH
HINGED BALLAST LOADS FOR OPERATION WITH THE IMPLEMENTS OF TRAILERS
AND SEMI-TRAILERS TYPE!
USE OF INDIVIDUAL BRAKES DURING OPERATION ON DOUBLED REAR
WHEELES IS FORBIDDEN!
Accumulated carrying capacity of dual tires shall not be 1.7 times larger than carry-
ing capacity of a single tire.
ATTENTION: DOUBLING OF FRONT WHEELS SHALL BE USED ONLY IN EX-
CEPTIONAL CASES. IN CASE OF DOUBLING OF FRONT WHEELS CONSULT YOUR
DEALER!
Note – Instructions on wheels doubling are set forth in subparagraph 4.2.10 "Rear
wheels doubling".
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