Buhnen HB 710 - Cleaning the Nozzle; Nozzle Systems; Replacing the Cone Nozzle (HB 710); Replacing the Nozzle End (HB 710)

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6.2.1 Cleaning the nozzle
• Wipethenozzlewithaclothtoremoveslightexternaldirt.
• Toremoveblockagesinsertadrillbit,needleorwireofsuitablediameterintothe
nozzleorice.
Instubborncasesreplacethenozzle(seeSection6.3).
6.3 Nozzle systems
HB 710 HB 710 Spray
Valve seat (A6)
Nozzle foot (A5)
Protection cap (A4)
Washer (A3)
Locking ring (A2)
Cone nozzle (A1)
Nozzle block (B7)
Protection cap (B6)
Ball (B5)
Pressure spring (B4)
Swirl nozzle (B3)
Air cap (B2)
Cap ring (B1)
Fig 6.3/1: Nozzle systems in detail
6.3.1 Replacing the cone nozzle (HB 710)
Tools needed • 2open-endspannerssize19
• 1Seegercirclipringpliers
1. Disconnectthecompressedairsupply.
2. Letthedeviceheatupthoroughly.
3. Securethenozzlefoot(A5)andunscrewtheconenozzle(A1).
4. Screwonthenewconenozzle(A1)byhandrstandallowtoheatupfor2minutes.
5. Re-securethenozzlefoot(A5).Tightenthenewconenozzle(A1)withoutusingforce.
6. Assembletheremainingpartsinreverseorder.
6.3.2 Replacing the nozzle end (HB 710)
Tools needed • 2open-endspannerssize19
• 1open-endspannersize36orpipewrench
• 1Seegercirclipringpliers
Theremustbenomeltatallinthetankwhenthenozzleendisreplaced.
Thereforedischargethemeltcompletely,e.g.intoacollectingvessel.
1. First,proceedasdescribedinchapter6.3.1uptoPoint3(dismantlingthenozzle).
2. Removethelockingring(A2).
3. Removethewasher(A3)andtheprotectioncap(A4).
4. Securethevalveseat(A6)withtheopen-endspannersize36orthepipewrench.
Unscrewthenozzlefoot(A5).
5. Screwonthenewnozzlefoothandtight.Nowtightenlightly(withoutusingforce)with
theopen-endspanner.
6. Assembletheremainingpartsinreverseorder.
Servicing/maintenance