Multiva FX300 SeedPilot, Operation And Maintenance Manual

Page: 208 / 208

Calculating the stability of the tractor - seed drill combination
The load may impact the steerability of the tractor. The dead weight of the machine and the materials
in the hoppers may result in the loss of the stability of the tractor - seed drill combination.
This Appendix provides a recommendation on how to ensure the stability of the tractor - seed drill
combination by means of calculation.
The following formula can be used to calculate the tractor’s minimum weight 𝐼
𝐹,𝑚𝑖𝑛
, which will allow
the load on the front axle to be 20% of the weight of an empty tractor:
𝐼
𝐹,𝑚𝑖𝑛
=
(𝐼
𝑅
×(𝑐+𝑑))−(𝑇
𝐹
×𝑏)+(0,2×𝑇
𝐸
×𝑏)
𝑎+𝑏
, in which
1) See the tractor manual
2) See the implement manual
3) To be measured
Figure 1. Calculating the stability of the tractor - seed drill combination
𝑇
𝐸
[kg] Tractor’s dead weight
1)
𝑇
𝐹
[kg] Front axle load of an empty tractor
1)
𝑇
𝑅
[kg] Rear axle load of an empty tractor
1)
𝐼
𝑅
[kg] Total weight of the implement or rear ballast installed in the rear
2)
𝐼
𝐹
[kg] Total weight of the implement or front installed in the front
2)
𝑎
[m]
Distance between the centre of mass of the implement or front ballast installed in
the front and the centre of the front axle
2) 3)
𝑏
[m] Tractor’s wheelbase
1)
𝑐
[m]
Distance between the centre of the rear axle and the centre of the connecting
point of the link arm
1) 3)
𝑑
[m]
Distance between the centre of the connecting point of the link arm and the
centre of mass of the implement or rear ballast installed in the rear
2)