User`s guide

5-4
Maintenance and Troubleshooting 5
Troubleshooting
Hydraulic problems
Problem Possible cause Solution
Leaks from the hole at the Defective piston seal. Replace piston seal. Refer to
bottom of the pump head. User’s Guide for the pump head.
Low flow rate. Leaks. Check for leaks.
Plugged inlet filter. Clean or replace the inlet filter.
Refer to User’s Guide for the pump
head.
Defective check valve. Clean or replace the check valve.
Refer to User’s Guide for the pump
head.
Pump head not mounted Check that the pump head is
properly. properly mounted.
Air bubbles appear in both Loose connection of inlet Tighten the connection (but do inlet
and outlet tubing. tubing. not overtighten).
Worn flange of inlet tubing. Replace the inlet tubing.
Inlet filter partly clogged. Clean or replace the inlet filter.
Refill time is too long for the Decrease the refill time.
solvent.
Air bubbles appear only Loose connection of outlet Tighten the connection (but do not
in outlet tubing. tubing. overtighten).