36
Maintenance and Service
6. Pull the dispensing cartridge out of the pump by gently pulling down on the nozzle.
7. Disconnect the 90-degree elbow fitting from the cartridge fitting.
8. Using a 1/4-inch wrench, unscrew the cartridge fitting from the cartridge.
9. Discard the cartridge fitting in accordance with MSDS recommendations.
10. While holding the cartridge body in one hand and the end of the feedscrew in the other, gently
pull the feedscrew out of the body.
!
The thrust collar should remain attached to the feedscrew.
11. Using your fingers, remove the lower bearing from inside of the cartridge body.
"
NOTE
If the cartridge does not have a seal, skip to Step 13.
12. Using a cotton swab, carefully remove the seal from inside of the cartridge body.
!
The seal is very fragile. If the seal is not damaged, it may be reused.
13. While holding the cartridge body, gently twist the needle retainer to remove it from the end of the
cartridge.
Figure 5-2 DV-8000 Cartridge Disassembly (typical)
14. Use MSDS recommended cleaning solution and a small bottle brush or cotton swab to
thoroughly clean the following parts making sure all fluid and residue is removed:
•
Thrust Collar/Feedscrew
•
Needle
Retainer
•
Lower
Bearing
•
Cartridge
Body
•
Seal (if present)
"
NOTE
If your DV-8000 is configured with a precision needle, perform Steps 15 through 17. If your
DV-8000 is configured with standard Luer needle, skip to Step 18.
Thrust Collar/
Feedscrew
Assembly
Lower Bearing
Seal (not present in DV-
8442 Series Cartridges)
Cartridge Body
Cartridge Fitting
(Luer)
Needle
(standard Luer)
Needle Retainer