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Ver. 01.2020
5
User Manual ST-73.1 / ST-73.2 Foam Lance
Artikel-Nr.: 200 073 ...
The flat steel nozzle at the ST-73.1
/ ST-73.2 foam lance can be rotated
to any position. For this you only
have to turn the nozzle guard in the
desired direction.
Cleaning / Changing filter pad, mesh strainer
and injector nozzle
If the foam pattern is not as desired, amongst other things the cause may lie with the
filter pad or injector nozzle. If this is the case carry out the following remedial steps:
Technical data
Modell ST-73.1 / ST-73.2
Max. pressure
300 bar
Min. pressure
70 bar
Weight
ca. 0.5 kg
Only ST-73.1
Max. flow 1.25 nozzle
12 liter/min
Max. flow 1.5 nozzle
17 liter/min
Max. flow 1.8 nozzle
27 liter/min
Max. flow 2.1 nozzle
30 liter/min
turnable
Cross recess
Cleaning / changing mesh strainer
ST-73.2
Both cylindrical pins (2) have to be hit off by means of a pin punch.
1. Remove the foam top (1) including the inner sieve (3) and the mesh strainer (5) from the
foam lance (4).
2. Take the sieve (3) and the mesh strainer (5) out of the foam top (1).
3. Rinse the sieve (part number: 040 001 791) and the mesh strainer (part number: 020
000 606) with clear running water. Please replace them if they are damaged or very
dirty.
4. When assembling please make sure that the mesh strainer is folded as it was at delive-
ry of the foam lance ST-73.2.
5. The assembly must be carried out in reverse order.
Cleaning / changing filter pad
ST-73.1
1. Loosen the locking screw (3) with a cross-head screwdriver.
2. Screw a component with a G ¼ external thread, e.g. a short tube, into the
injector unit (1).
3. Withdraw the injector unit slowly from the ST-73.1 foam lance (4).
4. From the injector unit (1), remove the foam pad (2).
5. Rinse the filter pad under clear running water and if the filter pad (2) is damaged re
-
place it (Product Code: 540 500 09).
6. Check to see, before reassembling the foam lance, whether all O-rings on
the injector unit are in serviceable condition and replace these if necessary (dealer’s
parts list).
7. Now reassemble in reverse order.
Cleaning / changing injector nozzle
ST-73.1 / ST-73.2
1. Unscrew the injector nozzle (1) from the ST-73.1 / ST-73.2 foam lance (2)
2. Check to see whether the injector nozzle (1) is only lightly soiled, in which case careful
cleaning by inserting a suitable piece of wire or the like will frequently solve the prob
-
lem. Note the corresponding bore of the injector nozzle (1) here! Otherwise this can get
damaged. It is also recommended to rinse the injector nozzle clean under running water
and the nozzle itself should be aligned with the direction of the water throughput.
3. In the event of high soiling and/or dirt often the only remedy is to exchange the injector
nozzle (1) (dealer’s parts list).
4. Check to see, before reassembling the foam lance, whether all O-rings on the injector
unit are in serviceable condition and replace these if necessary (dealer’s parts list).
