Nordson NPE-LF10 Customer Product Manual

Contents

NPE-LF10 and NPE-HF10 Powder Spray Guns12Part 108191C 2003 Nordson CorporationRepairWARNING: Allow only qualified personnel to perform the following tasks.Follow the safety instructions in this document and all other relateddocumentation.See Figure 3.Gun Resistor ReplacementThe kit used to replace the gun resistor consists of a new resistor installedin an insulating tube packed with 12−14 cc of dielectric grease.1. Unscrew the cable retaining nut from the cable adapter (1) and pull thecable out of the spray gun. Clean the end of the cable with a clean,lint-free cloth and inspect it for damage.2. Unscrew the cable adapter from the cable well (5) and pull the oldinsulating tube (6) and resistor (7) out of the cable well. If necessary,remove the electrode assembly (10) and push the insulating tube out ofthe cable well.3. Clean the cable well and inspect it for signs of arcing or carbon tracking.Replace it if it is damaged. Apply a small amount of LoctiteSuperBonder 416 adhesive (8) on the front threads of the new cablewell before you install it into the front support (9). Do not use adhesiveon the rear threads of the cable well or rear support (2).4. Install a new resistor kit in the cable well as shown.5. Screw the cable adapter onto the cable well and tighten it securely.6. Insert the cable end through the cable adapter and into the insulatingtube. The cable end will act as a plunger, forcing the grease around theresistor spring and cable. Push the cable in until the resistor is pressingagainst the end of the electrode assembly.WARNING: Once the cable is embedded in the dielectric grease inside theinsulating tube, do not pull it out. The suction created by pulling the cableout of the tube will cause air pockets to form. The air pockets will allow thehigh voltage to arc within the tube. Refer to the Electrostatic CableReplacement procedure for instructions.7. Wipe any extruded dielectric grease off the cable. Thread the cableretaining nut onto the cable adapter and tighten it securely.Powder Tube Replacement1. Remove the nozzle (11) and loosen the tube clamp (14) screws.2. Slide the powder tube (13) out of the spray gun.3. Install new O-rings (12) on a new powder tube. The HF10 powder tubeuses two O-rings; the LF10 uses one O-ring.4. Slide the new powder tube into the spray gun until the O-ring at the inletend is against the rear support. The O-ring serves as a stop to positionthe tube in the spray gun.