GROOMING MOWERS - SGM Series - Models SGM 48-60-72-84
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4.3. TRACTOR-MOWER STABILITY
Before connecting the machine to the tractor is required to check the stability of the tractor-
machine system, in order to determine the ballast to apply to the front of the tractor, to ensure
adequate distribution of the weight on the axles when the implement is in lifted position (e.g. for
transportation).
In order to assure the stability it is necessary that the following relations are verified (see table be-
low for definitions):
1) M x (S1+S2) ≤ 0.2 x T x i + Z x (d+i)
2) M ≤ 0.3T
Consequently, the minimum ballast required is:
Zmin = (M x (S1+S2) - 0.2 x T x i)/(d+i).
To determine the appropriate characteristics of the ballast, refer to the manual of the tractor.
i =
d =
T =
Z =
M =
s1 =
s2 =
Tractor wheelbase (cm)
Distance between front axle and ballast center of mass (cm)
Weight of tractor + operator (75 kg)
Ballast weight (kg)
Implement weight (kg)
Distance between rear axle and lower hitch points (cm)
Distance between lower hitch points and implement center of mass:
51 cm (SGM 48) - 55 cm (SGM 60) - 60 cm (SGM 72) - 68 cm (SGM 84)
The weight of the implement modifies the stability of the system tractor-mower, resulting in loss of
steering control and braking.
5. OPERATING
Before operate the mower, make sure you have read and understood the operating manuals of the
mower, tractor and PTO shaft, and followed what is described in the section "Set Up".
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