Waters HPLC - Page 109

Troubleshooting 3-25
Pump leaks solvent Loose fitting Tighten leaking fitting.
Salt crystals or debris
in fitting
Stop Flow; remove and
disassemble fitting;
rinse fitting
components with water;
reassemble fitting.
Damaged fitting
assembly
Stop Flow; remove and
disassemble fitting;
verify fitting
components; replace
ferrule and other
damaged parts.
Worn pump plunger
seals
Replace seals.
Loose pump head Tighten loose pump
head(s) with a 5/32-inch
hex-head wrench.
Loose pump inlet or
outlet check valve
Tighten loose check
valve(s).
Loose compression
screw(s) on the pump
head
Tighten loose
compression screw(s)
with a 5/16-inch
open-end wrench.
Pump troubleshooting (Continued)
Symptom Possible cause Corrective action