Filling The Container - Stihl SR 420 Instruction Manual

English
10.2 Metering knob
4
► The discharge rate can be infinitely varied by
turning the metering knob (2) on the noz‐
zle (3).
Position 1 = minimum flow rate
Position 6 = maximum flow rate
The numbers on the metering knob must be lined
up with the lug (4) under the knob.
10.3 Discharge rate without pres‐
sure pump
Standard metering knob
Discharge rate in l/min
Blower tube angle
Knob set‐ ‑30°
ting
1 0.384
2 1.062
3 1.947
4 2.848
5 3.471
6 3.844
ULV metering knob
Discharge rate in l/min
Blower tube angle
Knob set‐ ‑30°
ting
0.5 0.054
0.65 0.087
0.8 0.138
10.4 Discharge rate with pressure
pump (special accessory)
Standard metering knob
Discharge rate in l/min
Blower tube angle
Knob set‐ ‑30°
ting
1 0.654
1.6 1.666
2 2.928
16
2
3
0° +30°
0.290 0.257
0.908 0.782
1.614 1.336
2.402 1.903
2.993 2.413
3.251 2.526
0° +30°
0.041 0.043
0.077 0.064
0.117 0.098
0° +30°
0.651 0.636
1.747 1.700
2.896 2.864
ULV metering knob
Discharge rate in l/min
Blower tube angle
Knob set‐ ‑30°
ting
0.5 0.142
0.65 0.216
0.8 0.352
10.5 Checking metering unit
► Place the machine on the ground.
► Remove the baffle screen and pressure pump.
► Fill the container with water up to 10 liter mark.
► Set the metering knob to position 6.
► Start the machine.
► Hold the blower tube horizontally, run the
engine at full throttle, spray the contents of the
container down to the 5 liter mark and note the
time taken.
The time required to spray 5 liters fluid should be
between 140 and 170 seconds.
In case of deviations:
► Check the metering unit for contamination and
clean it if necessary.
► Check engine setting and correct if necessary.
If there is no improvement, contact your dealer
for assistance.

11 Filling the Container

► Stand the sprayer on a level surface.
► Close the stop cock.
► Fill up with thoroughly mixed spray solution –
do not exceed 13 liter mark (arrow).
11 Filling the Container
0° +30°
0.132 0.128
0.212 0.203
0.403 0.377
0458-372-0121-C