NPE-LF10 and NPE-HF10 Powder Spray Guns
12
Part 108191C
E
2003 Nordson Corporation
Repair
WARNING:
Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
See Figure 3.
Gun Resistor Replacement
The kit used to replace the gun resistor consists of a new resistor installed
in an insulating tube packed with 12
−
14 cc of dielectric grease.
1. Unscrew the cable retaining nut from the cable adapter (1) and pull the
cable 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 old
insulating tube (6) and resistor (7) out of the cable well. If necessary,
remove the electrode assembly (10) and push the insulating tube out of
the 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 Loctite
SuperBonder 416 adhesive (8) on the front threads of the new cable
well before you install it into the front support (9). Do not use adhesive
on 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 insulating
tube. The cable end will act as a plunger, forcing the grease around the
resistor spring and cable. Push the cable in until the resistor is pressing
against the end of the electrode assembly.
WARNING:
Once the cable is embedded in the dielectric grease inside the
insulating tube, do not pull it out. The suction created by pulling the cable
out of the tube will cause air pockets to form. The air pockets will allow the
high voltage to arc within the tube. Refer to the
Electrostatic Cable
Replacement
procedure for instructions.
7. Wipe any extruded dielectric grease off the cable. Thread the cable
retaining nut onto the cable adapter and tighten it securely.
Powder Tube Replacement
1. 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 tube
uses 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 inlet
end is against the rear support. The O-ring serves as a stop to position
the tube in the spray gun.
