8 MAINTENANCE
0463 703 001
GB
-61-
8.2.1
Wire-feeder assembly cleaning
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!
WARNING!
Always use hand and eye protection when cleaning.
1. Disconnect the electrical power source from the unit.
2. Open the cover on the wire-bobbin side of the EMP unit.
3. Before moving the tension knob (1): note its numerical setting as indicated on its body right below the handle. Record
this number to reset the tension in its approximate range. Section "Setting wire-feed pressure" describes the fine adjust-
ment for this tension adjustment.
NOTE!
Since the wire-feed pressure adjustment must be disturbed to release this arm,
the tension on the rollers will have to be re-adjusted at the end of this procedure.
Recording the undisturbed scale number in the previous step facilitates the process
at the end of the procedure to accurately set the tension.
4. Release the tension from the pressure rollers by turning the tension knob on the tension arm counter-clockwise enough
to pull it first up (out of its detent slot) and then toward you (see 1 in illustration above). The tension arm will spring-up
as soon as the tension arm is released. This should free the wire movement to remove the wire in the next step.
5. Using (as needed) either soft-bristle brush or use a forced air source by blowing compressed air (max. 5 bar) to remove
all debris which may have accumulated in this space. WEAR EYE PROTECTION.
6. Inspect if the input wire-feed guides and the feed rollers for wear and need replacement. See "WEAR PARTS" section
for ordering wear-part numbers. See "Removing wire-feed roller" subsection in "Removing/Installing wire-feed roller"
section in the "OPERATION" chapter. If none need replacement – only cleaning – go to the next step.
CAUTION!
When removing the roller be careful not to lose the drive-shaft key on the motor
shaft. Failure to comply will render the entire unit useless until this part is replaced.
7. Clean the wire-feed roller with a soft brush.
8. Clean the pressure roller attached to the tension arm with a soft brush.
9. Close the tension arm on to the wire in its groove on the wire-feed rollers.
NOTE!
Verify that the wire is in its groove and not floating out of the groove on the roller
surface.
10. Visually verify that the wire appears as a straight line through the entire wire-feed assembly.
11. Visually verify that the wire protrudes per specification at the torch tip and has not been pulled into the torch head.
12. Adjust the wire-feed pressure by adjusting the tension on the wire at the wire-feed rollers by turning the tension knob
using the procedure in "Setting wire-feed pressure" section.
13. Close the cover on the wire-bobbin side of the EMP unit.
