Operating Instructions; Calculating Required Quantity Of Solution - Stihl SR 430 Instruction Manual

Operating Instructions

During break-in period
A factory-new machine should not be
run at high revs (full throttle off load) for
the first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During Operation
After a long period of full throttle
operation, allow the engine to run for a
short while at idle speed so that engine
heat can be dissipated by the flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Empty the fuel tank
and keep the machine in a dry place,
well away from sources of ignition, until
you need it again. For longer out-of-
service perionds – see "Storing the
Machine".
SR 430, SR 450
Calculating Required
Quantity of Solution
Determining surface area (m
In the case of ground crops, simply
multiply the length of the field by its
width.
The surface area of high-growing plants
is calculated approximately by
measuring the length of the rows and the
average height of the foliage. The result
is multiplied by the number of rows and
then by two if both sides have to be
treated.
The surface area in hectares is obtained
by dividing the number of square meters
by 10,000.
Example:
A field 120 meters long and 30 meters
wide has to be treated with a pesticide.
Area:
2
120 m x 30 m = 3,600 m
3,600 / 10,000 = 0.36 ha
Determining quantity of active
ingredient
Refer to the instructions supplied with
the active ingredient to determine:
– Required quantity of active
ingredient for 1 hectare (ha).
– Concentration of active ingredient
(mix ratio).
Multiply the required quantity of active
ingredient for 1 hectare by the area
determined in hectares. The result is the
quantity of active ingredient required for
2
) the area to be treated.
Example:
According to the maker's instructions,
0.4 liters of active ingredient are
required per hectare to obtain a
concentration of 0.1%.
Quantity of active ingredient:
0.4 (l/ha) x 0.36 (ha) = 0.144 l
Determining quantity of solution
The quantity of solution required is
calculated as follows:
T
W
x 100 = T
K
T = Quantity of active ingredient in l
W
K = Concentration in %
T = Required quantity of solution in l
W
Example:
The calculated quantity of active
ingredient is 0.144 liters. According to
the maker's instructions, the
concentration is 0.1%.
Quantity of solution:
0.144 l
x 100 = 144 l
0,1 %
Determining walking speed
Carry out a trial run with the machine
fueled and the container filled with
water. Operate the spray tube (swing it
English
B
17