Owner`s manual

34 Maintenance and Service
10. Using your fingers, remove the lower bearing from inside of the cartridge body.
11. 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.
12. While holding the cartridge body in one hand and the needle retainer in the other, gently twist the
retainer to the left to remove it from the end of the cartridge.
13. Remove the needle from inside the needle retainer.
Figure 5-1 DV-7000 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:
• Feedscrew • Needle Retainer
• Thrust Collar • Cartridge Body
• Seal
! Use the reamer from the cleaning kit to remove any residual fluid from inside the
cartridge body.
"NOTE If your DV-7000 is configured with a precision needle, perform Steps 15 through 17. If the
pump is configured with a Luer adapter and standard needle, skip to Step 18.
15. Flush the large end of the needle with MSDS-recommended cleaning solvent.
Thrust Collar/
Feedscrew
Assembly
Lower Bearing
Seal
Cartridge Body
Cartridge Fitting
(Barbed)
Needle (footed
precision)
Nozzle Cap (Needle
Retainer)