MTW BELARUS 952.5, Руководство оператора

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952.5-0000010 OM
134
4.12 Finding of total weight, loads on the front and rear axles, tires holding
capacity and required minimum ballast
Amount of load on the tractor axles in structure of MTU may be found by means of
proximate weighting on truck scales of the corresponding carrying capacity.
Tractor weighting allows possibility to consider weight distribution of MTU masses
along the tractor axles completed by you in different operating conditions: “main operation”
and “transport”. During load sensing on the tractor axles, the technological load weight, for
example weight of seeds, distributed by a seeder, must be considered.
ATTENTION: TO REDUCE OVERLOAD OF THE REAR WHEELS AND FDA DUR-
ING COMPOUND UNITS COUPLING TOGETHER WITH USE OF RLL AND FLL, IT IS
NECESSARY TO LIFT RLL WITH THE IMPLEMENT FIRST, AND FLL WITH THE IM-
PLEMENT NEXT. GROUNDING SHALL BE CARRIED OUT IN REVERSE ORDER.
For finding of a load on the tractor axis by means of weighting on truck scales, it is
necessary to place the measured axis wheels of the tractor on a weighing platform, and
other axis wheels shall be kept out of the area of weighting on a level with the platform.
The following formula is used for load sensing
, where
- Т is load, N;
- M is mass, kg, and
- g=9.8 is gravity acceleration, m/s2
Calculation of load on the front tractor axis
, where
- Т f is load on the front tractor axis, N;
- is amount of the tractor operating weight with ballast (unit installed), distrib-
uted on the tractor front axis, kg;
- g=9.8 is gravity acceleration, m/s 2.
Calculation of load on the rear tractor axis
, where
Т z is load on the rear tractor axis, N;
is amount of the tractor operating weight with unit installed (ballast), distributed
on the tractor rear axis, kg.
- g=9.8 is gravity acceleration, m/s 2.
Calculation of load acting on one front or one rear tractor wheel for selection of
pressure in tires:
а ) during operation of tires on single wheels
2
f
f
T
G
=
;
2
Z
Z
T
G
=
, where
f
G
and
Z
G
are loads, acting on one front or one
rear tractor tire accordingly.
b) during operation of tires on doubled wheels:
(considering a permissible load on a tire during operation of tires on doubled
wheels):
1.7
f
G
doubl.=
f
G
1.7
Z
G
doubl.=
Z
G
f
G
doubl.=
7 , 1
f
G
Z
G
doubl.=
7 , 1
Z
G