Trainee Guide TR-L2-M2000
Level 2 Maintenance Training – M2000 Dispensing Systems 3-2-44 P/N 73-0018-00 (Revision B)
Exercise Sheet 3-6-11
Cleaning the DJ-2000
Tools and Materials Needed:
 Solvent
 Ultrasonic Cleaner
 Kimwipes
 Cotton swabs (mid-size and mini)
 Spray Solvent
 Magnifying Glass
 Flashlight
 .050-inch hex key
 7/64-inch hex key
 Small spanner wrench
 Slotted screwdriver
 O-ring removal tool
 Pin vise
 Air gun
1. Submerge the nozzle in solvent.
2. Remove the nozzle from the solvent and use an air gun to clear the fluid passage. If an
ultrasonic cleaning system is available, use it to submerge the nozzle.
3. Use a magnifying glass to inspect the nozzle, and use a flashlight or other light source to
check that the inner surfaces are free of adhesive.
4. Use the pin vise to insert a cleaning wire through the nozzle, and slowly remove it to
clean the inner surfaces.
5. When the nozzle is free of adhesive, wipe it with a cotton swab to dry.
6. Use a 7/64-inch hex key to remove the two hex screws from the heater.
7. Slide the heater and extension off the DJ-2000.
8. Pull the heater and extension apart to separate them.
9. Use the o-ring removal tool to remove the black o-ring from the extension.
10. Wipe the o-ring with a Kimwipe

tissue and inspect for tears. Replace the
o-ring if necessary.
11. Use a slotted screwdriver to remove the two fillister screws from the lower body and
carefully slide it off the needle.
12. Check that there is no fluid in the upper body port to make sure that the seal does not
leak.
13. If fluid is visible, use a cotton swab dipped in solvent to clean it out.
14. Place the o-ring removal tool in the center of the white o-ring, which holds the seal in
place, and lift it out from the lower body.
15. Inspect the o-ring for damage, and replace if necessary.
16. If the o-ring is not damaged, wipe it with a Kimwipe tissue dipped in solvent.
17. Wipe off the needle with a Kimwipe tissue, using solvent if necessary.
(Continued on page 3-2-46)
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