D-H 22 S - 16.02.2002 / Vers.: 1
13
4.5 Checking the injector as blasting performance decreases
(See figures 2 and 4, on pages 6 and 14)
As the blasting performance of the unit decreases you should check the
injector (20) and/or the blasting nozzle (22) as well as the suction basket (31)
as follows:
1. Switch off the unit at the main switch (12) and pull the mains plug!
2. Unhinge the injector holder (19) and take it out of the blasting chamber.
3. Detach spring plug (21) laterally.
4. Pull out blasting nozzle (22) by turning it and by applying counter force to the
injector casing (20).
5. Check whether foreign matter is located in the nozzle bore and, if necessary,
remove it.
6. Worn-out jets (22) (diameter larger than 4,5 mm) should be removed (see fig. 4
page 14).
7. injector needle (23) should be level with the edge of the injector casing (24). If
due to wear and tear the injector needle has shortened by more than 1,5 mm
then you should replace the injector.
−
Remove screw (25), seal air hose (27) and take out the injector together
with the blasting agent suction hose (26).
8. Check the suction basket (31) in the lower part of the sand basin for dirt
particles and, if necessary clean it (for further details see “Letting out blasting
agent“, section “4.4“).
